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Journal of Jilin University(Engineering and Technology Edition)
ISSN 1671-5497
CN 22-1341/T
主　任：陈永杰
编　辑：张祥合　曹　敏 　程仲基
　　　　赵莹莹　赵浩宇
电　话：0431-85095297
E-mail：xbgxb@jlu.edu.cn
地　址：长春市吉林大学南岭校区
　　　　逸夫教育大楼B823室
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01 March 2008, Volume 38 Issue 增刊
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Control strategy and simulation for electronic differential
of vehicle with motorized wheels
Jin Li-qiang, Wang Qing-nian, Zhou Xue-hu, Song Chuan-xue
吉林大学学报(工学版). 2008, 38 (增刊):  1-0006.  DOI:
Abstract ( 2271 )   PDF (543KB) ( 950 )  
The present control strategy of the electronic differential for the electric vehicle(EV) with motorized wheels(MWs) was investigated and the deficiency of the electronic differential control by controlling the driving motor speed was revealed. By analyzing the forces on the MW system a selfadaptive differential control strategy by controlling the driving motor torque was suggested. The differential performance of the EV with MWs when the driving motor was controlled by torque mode was simulated under typical conditions by selfdeveloped simulation software of the EV with MWs. The simulation results show that it is possible to realize the selfadaptive differential performance by controlling the driving motor torque under all typical conditions.
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Analysis of regenerative brake system of hybrid bus
based on SimulinkAMESim cosimulation
Wang Peng-yu，Wang Qing-nian，Hu An-ping，Yu Yuan-bin
吉林大学学报(工学版). 2008, 38 (增刊):  7-0011.  DOI:
Abstract ( 2366 )   PDF (470KB) ( 650 )  
The methology to calculate the braking force distribution coefficient of the hybrid bus was studied. A strategy to control the vehicle friction braking force by controlling the pressure modulator of the air antilock braking system was suggested for the parallel regenerative brake system of the hybrid bus to improve its braking force distribution and braking stability, and increase the braking energy regeneration. A cosimulation model was built with the platform of SimulinkAMESim and the simulation was performed. The simulation demonstrated the positive and encouraging results.
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Rated power and efficiency matching of induction motor for parallel
hybrid electric vehicle based on vehicle drive cycle
Wang Wei，Wang Qing-nian，Wang Peng-yu，Yu Yuan-bin
吉林大学学报(工学版). 2008, 38 (增刊):  12-0017.  DOI:
Abstract ( 2188 )   PDF (671KB) ( 666 )  
A method for matching induction motor rated power of the parallel hybrid electric vehicle based on the vehicle drive cycle was proposed. The regular operational power range of the motor was decided by the required power of the vehicle drive cycle, and the rated power of the motor was determined considering the limitation of the motor overload capability. A method for calculating the overall efficiency of the motor based on the vehicle drive cycle was suggested. Taking the Beijing and London vehicle drive cycles for examples, a simulation was done to analyze the working of 40 kW motor in the second generation prototype of FAW hybrid electric bus. The results show that the electromotor matching the vehicle drive cycle can improve the fuel economy effectively.
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Influence of electronically controlled limitedslip differential
on vehicle dynamic performance
Wang Yun-cheng，Wang Jian-hua，Xie Fei, Zhang Bao-sheng
吉林大学学报(工学版). 2008, 38 (增刊):  18-0022.  DOI:
Abstract ( 2541 )   PDF (453KB) ( 539 )  
An electromotortype electronically limitedslip differential(ELSD) was developed and its structural composition and working principle were presented. The influence of the ELSD on the dynamic performance of a rearwheel drive vehicle on the splitμ road was simulated by a fourwheel vehicle dynamic model. The simulated results show that the ELSD decreases the accelerating time from the start and the accelerating time on the direct gear on the splitμ road and increases the maximal gradeability on the splitμ sloping road.
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Co-simulation platform with AMESim and MATLAB for traction control system
Zhu Bing, Zhao Jian, Li Jing, Li You-de, Liu Wei, Wei Qing
吉林大学学报(工学版). 2008, 38 (增刊):  23-0027.  DOI:
Abstract ( 2679 )   PDF (484KB) ( 675 )  
A co-simulation platform for the traction control system(TCS) was constructed based on MATLAB and AMESim. A dynamic model of the 4WD vehicle and the controller were developed using MATLAB, a dynamic response model for hydraulic brake system was built using AMESim hydraulic module, and the data exchange was realized through AMESim special interface module and MATLAB S function. The hydraulic brake system model was revised by the experimental research. The performance of TCS under the typical conditions was simulated by the cosimulation platform. It can be conducted that a practical cosimulation platform for R&D of TCS has been acquired.
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Environmental evaluation of vehicle cruise control
Li Xiang-yu,Gao Zhen-hai, Yuan Chang-bi, Qiao Yan-juan
吉林大学学报(工学版). 2008, 38 (增刊):  28-0031.  DOI:
Abstract ( 2281 )   PDF (423KB) ( 629 )  
A vehicle longitudinal dynamics model including a vehicle emission submodel was established by the quantitative analysis of the effects of the vehicle cruise control on reducing the fuel consumption and emission pollutants, and a new adaptive fuzzy PID control algorithm of vehicle cruise control was suggested based on the traditional cruise fuzzy controller. With these two control algorithms, the vehicle fuel consumption and exhaust emissions of CO,HC,and NOx were compared under the typical cruise conditions. Therefore, the effects of the vehicle cruise control system on the vehicle emissions can be analyzed quantitatively instead of qualitatively, and a new evaluation method was provided to the optimization of the vehicle cruise control algorithm.
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Modeling and experiment of stoke dependent shock absorber
Guo Kong-hui，Sun Sheng-li，Xing Yun-ming, Gao Shi-meng
吉林大学学报(工学版). 2008, 38 (增刊):  32-0036.  DOI:
Abstract ( 2445 )   PDF (640KB) ( 742 )  
Based on the working principle, the internal configuration, and the valve system behavior of the shock absorber(SA), a mathematical model for the stroke dependent SA was built using the software ADAMS/Hydraulics. The damping force of the stroke dependent SA depends on not only the retative movement velocity, but also its displacement. In this model, the relationship between the SA dynamic behavior and its internal configuration was established by the parameters describing the valve system behavior. The calculated results agree well with the test data. The suggested model can be used to study the effects of construction parameters and dynamic behavior of the SA on the vehicle performance.
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Identification method of urban road traffic conditions
based on inductive coil data
Jiang Gui-yan，Guo Hai-feng，Wu Chao-teng
吉林大学学报(工学版). 2008, 38 (增刊):  37-0042.  DOI:
Abstract ( 2519 )   PDF (692KB) ( 852 )  
A realtime method identifying the urban road traffic conditions and its evaluation approach were proposed based on the fuzzy clustering algorithm and the data from the inductive coil of the SCOOT traffic signal control system. A method to determine the idenlification time interval was also presented. A simulation was performed by software VISSIM to confirm the proposed methodology. A comparative analysis show positive and encouraging results.
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On-ramp metering control strategy of urban expressway
Chen Xue-wen, Wang Dian-hai, Jin Sheng, Wang Cai-xia
吉林大学学报(工学版). 2008, 38 (增刊):  43-0048.  DOI:
Abstract ( 2666 )   PDF (558KB) ( 683 )  
Taking Beijing urban expressway system as a research object, its traffic flow characteristics were analyzed based on the survey data collected from its representative sections, and a optimization control strategy for the onramp metering was suggested. A feedback control to the onramp was realized by the ime occupancy and the vehile speed as the control variables, and using the comprehensive control effect of both parameters to determine the onramp metering rate. The critical threshold in the model was calibrated using the linear discriminant function in the pattern recognition. The suggested strategy was verified by simulation with software VISSIM. The results show that compared with those of without signal control mode, the suggested strategy increases the average speed on the mainline upstream at onramp by about 8%, and decreases the travel time on the mainline section by 7.2%.
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Traffic flow model by simulating circuit at signalized intersections
Qu Zhao-wei，Liu Shi-xu，Wang Dian-hai，Wei Wei
吉林大学学报(工学版). 2008, 38 (增刊):  49-0052.  DOI:
Abstract ( 2055 )   PDF (345KB) ( 508 )  
The dissipation process of the traffic flow at the signalized intersection was studied based on the theory about the electric current model of the RLC circuit. By analogy of the similar pulsed characteristics of the electric circuit and the signalized intersection, a traffic flow dissipation model was built an verified by the practical traffic survey data at the typical intersections of Changchun city. The results show that the traffic flow model by simulating the electric circuit at the signalized intersections can describe quantitatively the dissipation process of the traffic flow at intersections.
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Phaseoffset optimization model and simulation of adjacent intersections
Gu Yuan-li，Yu Lei，Shao Chun-fu
吉林大学学报(工学版). 2008, 38 (增刊):  53-0058.  DOI:
Abstract ( 2221 )   PDF (613KB) ( 768 )  
The domestic urban traffic flow characteristics are different from abroad, so applying the imported coordinated traffic signal control system on the domestic urban arterial road can not obtain satisfactory effect. Taking the coordinated control system on the urban arterial road between two adjacent signaled intersections in Beijing as an example, considering the traffic flow dispersion and the delay on China road traffic, setting the minimal delay at the intersections as the optimization objective, an optimization model on the coordinated control on the phaseoffset between the adjacent intersections was built. The genetic algorithm was used to solve the problem to avoid the weakness of the traditional graphical or numerical method. The simulation results show that the new method is better than the traditional ones. The model is able to describe accurately the actual traffic flow and the control effect, to decrease the delay at the adjacent intersections.
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Optimization of production logistics process of automobile
manufacture enterprise based on Petri net
Wang Yun-peng, Li Shan-xing, Wang Zhan-zhong, Li Shi-wu, Dong Shengwu, Cui Li-xia
吉林大学学报(工学版). 2008, 38 (增刊):  59-0062.  DOI:
Abstract ( 2592 )   PDF (334KB) ( 602 )  
The production logistics process of the modern automobile manufacture is a complex, dynamic and stochastic process of logistics, information flow and capital flow. Taking the production logistics process of a domestic largescale automobile manufacture enterprise as research object, a model of production logistics process in the present environment was built using the Petri net technology, whose mathematical characteristis was analyzed, and the strong and weak points in the original and the optimized processes were discovered by the simulation using the software Exspect. The results show that the optimization of the original process flow by information technology reduces effectively the probability of mistake and fault in the system operation and enhances the system work efficiency.
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Public transport service level based on customer satisfaction
Jin Ning，Juan Zhi-cai
吉林大学学报(工学版). 2008, 38 (增刊):  63-0066.  DOI:
Abstract ( 1935 )   PDF (336KB) ( 593 )  
The behavior of accomplishing the transport of a great number of passengers by a few main public transport lines was analyzed applying the Pareto's law. It was revealed that on the basis of satisfying the basic service need of all passengers, enhancing the service level of the main public transport lines leads to improvement of the service level for the most passengers. A bus customer satisfaction index model was built and a corresponding survey scheme was proposed. The bus customer satisfaction index was used to analyze quantitatively the public transport service level to reflect the satisfaction degree of the people to the urban public transport service.
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System dynamics model describing the relation between
city landuse and traffic system
Liu Bing-en，Juan Zhi-cai，Jia Hong-fei
吉林大学学报(工学版). 2008, 38 (增刊):  67-0070.  DOI:
Abstract ( 2585 )   PDF (281KB) ( 520 )  
Since there are symbiosis characteristics of mutual connection and mutual influence between land use and traffic system, coordination must be emphasized in the process of a city's construction. Combining the actual data of Shanghai and based on the system dynamics theory, the quantitative influence relation and causeeffect affects between each factor of the system formed with traffic system and land use were studied utilizing the picture of causeeffect relation and the picture of systematic dynamics flow respectively, and further submodel partition and function fitting were carried out for the picture of systematic dynamics flow. A system dynamics model describing the relation between landuse and traffic system was developed in the end. The model verification result shows the model can be used to reflect relation between land use and traffic system relation.
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Design of a camless valvetrain for diesel engine
Wang Yun-kai，Yu Xiu-min，Guo Ying-nan，Liang Jin-guang，Liu Yue，Li Jing
吉林大学学报(工学版). 2008, 38 (增刊):  71-0074.  DOI:
Abstract ( 2520 )   PDF (370KB) ( 727 )  
An electrohydraulic camless variable valvetrain was developed for the 1105 type single cylinder diesel engine. The hardware design of the system was presented, the timedelays of its electromagnetic valves were calibrated, and the tentative tests of the system were done. The test results show that the developed valvetrain is characterized by good reliability and repeatability, it works well for the flexible control of the valve timing. Nevertheless, these are some shortcomings in it which should be overcome in the future.
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Cold start firing behavior of electronically controlled injection
methanol engine with LPG as ignition improver
Gong Chang-ming，Wang Shu，Deng Bao-qing，Yu Xiao-lu，Gao Qing，Liu Xun-jun
吉林大学学报(工学版). 2008, 38 (增刊):  75-0079.  DOI:
Abstract ( 2781 )   PDF (476KB) ( 628 )  
The transient firing behavior of a sparkignition engine fueled with methanol blended with LPG at cold start was investigated experimentally in a 125 mL single cylinder electronically controlled fuel injection engine. The effects of the blended LPG amount, the injection timings of the methanol and the LPG on the firing behavior and HC emission of the engine were studied by means of cycletocycle control technique. The results show that a propriety amount of LPG injected into the intake port promotes the cold start of the methanol engine and the LPG amount affects the cold start firing behavior significantly. Optimal control on the LPG injection timing improves the cold start reliability and reduces the HC emission at the cold start.
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Effect of methanol injection timing on methanoldiesel dualfuel
compression ignition engine performance
Fang Xian-zhong, Li Guo-liang, Yan Shu-fang, Liu Xun-jun
吉林大学学报(工学版). 2008, 38 (增刊):  80-0084.  DOI:
Abstract ( 2523 )   PDF (446KB) ( 517 )  
：Using methanol as the main fuel and diesel as the ignition fuel, the effect of the methanol injection timing on the performance of a methanoldiesel dualfuel compression ignition engine was studied experimentally. Test results show that when the injection timing of the ignition diesel keeps constant at 21 ℃A BTDC, the engine operates smoothly and economically with the injection timing of the methanol at 23 ℃A BTDC. Maximum statistical combustion pressure of dual fuel engine decreases with the advance of the methanol injection at small load conditions, and increases with the advance of the methanol injection at large load conditions. With the advance of the methanol injection, the engine operation becomes more and more unsteady, demonstrated by the high variation of the incylinder pressure. The power of the methanol compression ignition engine with diesel as ignition fuel is best when methanol fuel injection timing is 26 ℃A BTDC. When the methanol injection timing reaches 29 ℃A BTDC, the injected ignition diesel can not ignite the methanol reliably.
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Twophase three dimension flow field simulation in a cyclone separator
Gao Yin-han，Chen Wang-feng，Cheng Peng，Li Zhen-lei，Chi Juncheng，Li Qiang3
吉林大学学报(工学版). 2008, 38 (增刊):  85-0089.  DOI:
Abstract ( 1939 )   PDF (720KB) ( 416 )  
The k-ε double equation turbulent flow model of three cyclone separators with different inserting depth of ventpipe was built using commercial computational fluid dynamics (CFD) software STARCD, and the flow field in the cyclone separators was simulated. Through analyzing the effects on the flow field in the three cyclone separators, which is with different dimension ventpipe. The distribution of pressure and velocity, and moving track of SiO2 particles with dimension of 20 μm and 2 μm in the cyclone separators were obtained, which is an significant theoretic reference for cyclone separator design and optimization.
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Tribological behavior of SEBS-g-MA rubber particles
and organoclay reinforced PA66 Composite
Hu Hai-xia Yu Si-rong, Liu Zhao-zheng, Li Song
吉林大学学报(工学版). 2008, 38 (增刊):  90-0093.  DOI:
Abstract ( 2423 )   PDF (702KB) ( 471 )  

Abstract：The friction and wear behaviors of polyamide 66 (PA 66) and SEBSgMA rubber particles or organoclay or both reinforced PA 66 composites were investigated on an M200 model ringandblock contact type friction and wear tester under dry friction and water lubrication condition. In order to reveal the wear mechanisms, the worn surfaces and scraps were analyzed by scanning electron microscopy and differential scanning calorimeter. The experimental results indicat that the wear mass loss and the friction coefficient of PA 66+ (SEBSgMA+organoclay) ternary nanocomposite are the minimal compared with the other three samples. When service temperature reaches glasstransition temperature Tg, PA66 and PA66/SEBSgMA composite become soft, and adhesive wear is the main wear mechanism, which possibly happens under dry friction and high load conditions.
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Plastic zone at crack tip of connecting rod under static loading
and its effect on fracture splitting quality
Kou Shu-qing，Wang Yan-ju，Yang Shen-hua
吉林大学学报(工学版). 2008, 38 (增刊):  94-0098.  DOI:
Abstract ( 1923 )   PDF (461KB) ( 704 )  
The fracture splitting process of the connecting rod big end with the starting notches under static loading was numerically analyzed. The planar stress and strain states in the crack zones of the connecting rod were presented qualitatively by comparing the shape of the plastic zone at the crack tip of the connecting rod with an ideal plate, making it possible to analyze the fracture states on different areas. It was found that the plastic zone at the crack tip varies thicknesswise, and the fracture will start at the crack zone whoe planar strain state firstly reaches the deformation limit. The difference of the plastic zone at the crack tip leads to the scattering of the starting cracking points, crack spreading asynchronously and in different paths. All of these may result in the defects of the connecting rod splitting, such as the crack bifurcation unnormal crack joints, and the fracture disfigurements like the avulsion, corner collapse, step fracture surface, scrap inclusion, and dissilient exterior edge,etc.
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Engine assembly test and wear characteristics of automotive chain
Meng Fan-zhong，Zhang Jin-ping，Xu Shu-xin
吉林大学学报(工学版). 2008, 38 (增刊):  99-0102.  DOI:
Abstract ( 2455 )   PDF (548KB) ( 567 )  
The wear mechanism and the wear elongation ratio of the automotive chain were studied by means of the engine assembly test. The wear surface microtopography of the pin and bush and the metallographic structure of the roller material were analyzed. The plastic deformation of the main parts of the automotive chain and the cyclic characteristics of its wear surface were investigated. The fretting wear between the matched parts with interference fit and its cause were explained by the pressout force test of the connection frimness degree. The results show that the fatigue wear is the main wear mechanism of the pin and bush of the automotive chain, accompanied by the abrasive wear and the adhesive wear. After 3000 h highspeed test, the plates and rollers display great plastic deformation, the rollers are hardened cyclically, and the fretting wear between the matched parts appears severe.
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Dynamic behaviors of lever amplification type piezoelectric
directly driven servo valve
Shen Chuan-liang，Yang Zhi-gang，Cheng Guang-ming，Zeng Ping，Li Peng
吉林大学学报(工学版). 2008, 38 (增刊):  103-0106.  DOI:
Abstract ( 2344 )   PDF (366KB) ( 565 )  
A piezoelectric directly driven servo valve with a lever amplification mechanism was proposed. The valve is driven directly by a large strake multilayer piezoelectric stack, its displacement actuates the power cascade spool after amplification by a lever mechanism. A dynamic model for the spool motion system was built using an analytical approach and the simulation analysis was carried out. A prototype of the value was made and put to trial. The results show that the forward and backword step response times are 0.54 and 1.08 ms respectively, and the frenquency band width is about 1 kHz. The new type servo valve can be used in the vibration test bench, the fatigue test bench, and the various hydraulic control systems which need fast response characteristics.
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Characteristics of piezoelectric pump with optimal
for flow rate frequency 50 Hz
Wu Bo-da,Zhang Zhi-yu,Sun Xiao-feng,Yang Xu,Cheng Guang-ming,Yang Zhi-gang
吉林大学学报(工学版). 2008, 38 (增刊):  107-0110.  DOI:
Abstract ( 2683 )   PDF (361KB) ( 473 )  
A piezoelectric pump working at optimal for flow rate frequency 50 Hz was developed. The influences of the arrangement and diameters of inlet and outlet, the Oring layout, and the chamber height on the optimal for flow rate working frequency were studied experimentally. The developed piezoelectric pump can be driven directly by the utility electric power supply system and its flow rate can be adjusted by a resistor voltage divider. The test results show that the pump works steadily with water as working medium and 50 Hz,200 V power supply and the flow rate as high as 600 mL/min. The pump is characterized by simple structure and low cost becanse of no need of the special power source.
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Piezoelectric pump with active electromagnetic driven valve
Li Peng, Cheng Guang-ming, Dong Jing-shi, Yang Zhi-gang, Zeng Ping
吉林大学学报(工学版). 2008, 38 (增刊):  111-0114.  DOI:
Abstract ( 2125 )   PDF (382KB) ( 476 )  
A new type of piezoelectric pump with active electromagnetic driven valve was developed. Compared with the piezoelectric pump with the passive valve which is opened by the flowing fluid, the valve of this pump is opened by the electromagnetic force, so can save the energy consumption of fluid inside the piezoelectric pump chamber when the valve works. Moreover, according to the requirements of working condition, the value timing can be controlled by adjusting the duty cycle and phase of the control signal of the valve. This makes the pump not only be able to pump the liquid forward and backward actively, but also to control the flow rate accurately, which provides a new approach of improvement of the piezoelectric pump performance. The experimental results show that the maximum flow rate of the pump was 160 mL/min at frequency 30 Hz.
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Fault analysis for numerical control machine tools based on fuzzy logic
Xue Yu-ia，Shen Gui-iang，Zhang Ying-hi
吉林大学学报(工学版). 2008, 38 (增刊):  115-0118.  DOI:
Abstract ( 1908 )   PDF (488KB) ( 617 )  
A fault analysis method by combination of the fuzzy fault tree analysis and the fuzzy criticality analysis was proposed to consider the actual fault characteristics of the numerical control(NC) machine tools. Taking a certain type of NC machine tool as an example a quantitative analysis of the fault tree built on the basis of the onsite fault data was done to determine the fuzzy fault rate of the top fault event and the secondary fault events. Based on this analysis, the fuzzy criticality analysis was performed to find out the key components and the weak links, providing a theoretical basis for the reliability improvement of the NC machine tools.
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Failure analysis and reliability improvement measures of machining
center based on failure density proportion
Wang Gui-ping，Jia Ya-zhou，Shen Gui-xiang，Qiao Wei-wei
吉林大学学报(工学版). 2008, 38 (增刊):  119-0122.  DOI:
Abstract ( 1918 )   PDF (342KB) ( 797 )  
Based on probing into the traditional method of failure analysis, a new method to apply the concept of failure density proportion to analyze the reliability of the machining center was proposed. The method considers comprehensively the failure time duration and frequency, the importance level of the subsystems and the reliability indexes, can quickly and exactly decide the main direction of reliability enhancement. Taking a certain type of machining center as an example, its failure data were analyzed statistically and it was found that its cooling system, lubrication system and electrical system are the weak links of reliability. The causes of the failure of the weak links were analyzed and the corresponding measures to enhance the reliability were suggested. The results demonstrat that the proposed method is practical and reasonable.
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Fault mode and effect analysis of computer numerical control equipment
Zhang Ri-ming，Sun Da-wen
吉林大学学报(工学版). 2008, 38 (增刊):  123-0125.  DOI:
Abstract ( 1925 )   PDF (274KB) ( 410 )  
The relationships among the itemsets in the fault database of the computer numerical control(CNC) equipments were mined by the method of association rules, the association relationships among the fault causes, the fault modes and the fault sites of the CNC components or systems were obtained and explained in detail providing a valid and simple method for the fault mode and effect analysis(FMEA).
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Noise reduction mechanism of nonsmooth leading edge of owl wing
Ren Lu-quan，Sun Shao-ming，Xu Cheng-yu
吉林大学学报(工学版). 2008, 38 (增刊):  126-0131.  DOI:
Abstract ( 2468 )   PDF (690KB) ( 653 )  
The winging noise of the longeared owl was measured, and the results indicated that the circulararc tooth shaped nonsmooth leading edge of its wings has remarkable influence on its flight noise reduction. Applying the reverse reconstruction technique to quantify the geometry information about the nonsmooth leading edge shape of the longeared owl wing, a bionic analogy air foil model was built. A numerical simulation on the noise reduction characterstic of the bionic nonsmooth leading edge airfoil model by computational aeroacoustics method was performed. The airflow noise control mechanism of the bionic nonsmooth airfoil model was studied through the analysis of the influence of the bionic nonsmoothness on the model surface flow field. It was found that comparing with the smooth airfoil model, the bionic nonsmooth airfoil model can reduce the airflow noise level by 5~10 dB, and increase the lift of the airfoil. The reasoons may consist in that the nonsmooth leading edge of the airfoil can rectify the flow around the airfoil and control the boundary layer strippping, reduce the airflow noise from the airflow pressure fluctuation on the airfoil surface and the turbulence breakaway.
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Efficient method for computing highorder sensitivities of eigenvalues
Guo Rui，Chen Su-huan，Meng Guang-wei
吉林大学学报(工学版). 2008, 38 (增刊):  132-0136.  DOI:
Abstract ( 2057 )   PDF (581KB) ( 530 )  
The computation of the highorder sensitivities is a tedious and difficult job. The method for computing the highorder sensitivities of eigenvalues were developed，using the secondorder perturbation of eigenvalues of multiparameter structure, and the approximate method for computing the secondorder sensitivity matrix of eigenvalues, Hessian matrix, was obtained. A numerical example of a frame structure was given to illustrate the valid of the present method. The numerical results shown that the present method is efficient for computing the secondorder sensitivity matrix.
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Recursive procedure for designing the multiinput modal
controllers for the nearly defective systems
Chen Yu-dong
吉林大学学报(工学版). 2008, 38 (增刊):  137-0140.  DOI:
Abstract ( 2028 )   PDF (294KB) ( 449 )  
A recursive procedure for designing the feedback controller with multiinput for nearly defective systems was presented . For such system, we first transform it into a defective one, and apply the same method for the defective system to deal with. The proposed methods are based on the modal coordinate equations, to avoid the tedious mathematical manipulation. At the end of the paper, two numerical example are given to illustrate the procedure.
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Stochastic finite element method based on automatic differentiation
Ma Feng-lei,Zhang Yi-min,Jiang Zhen-hai
吉林大学学报(工学版). 2008, 38 (增刊):  141-0144.  DOI:
Abstract ( 2096 )   PDF (414KB) ( 421 )  
Based on the combination of the theory of automatic differentiation technique and the finite element analysis(FEA) method, a numerical module of stochastic FEA was proposed. A calculation module was compiled in language Frotran 90 which converts directly a general FEA program into a stochastic FEA program. By this module it is possible to calculate the responses such as the strees and the strain as well as their partial derivatives with respect to the stochastic parameters fast and precisely. Taking a highpressure naturalgas tank as an example, its stochastic stucture response analysis was done and the result coincided with the simulation result with Monte Carlo method on the whole. The proposed method can be used to analyze the stochastic structure not only when the loads and material properties are stochastic variables, but also when the structure geometry is stochastic, laying a foundation of engineering application of the stochastic FEA.
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Algorithm of graph matching based on mental imagery semantic nets
Zhao Hong-wei, Zhang Hai-long，Liu Ping-ping，Wang Hui, Xu Zheng-yu2
吉林大学学报(工学版). 2008, 38 (增刊):  145-0149.  DOI:
Abstract ( 2680 )   PDF (300KB) ( 599 )  
A new method for searching mental imagery in semantic nets is proposed. The problems of semantic nets of mental imagery are generally solved by graph matching. First a semantic net with variable nodes is constructed in accordance with the requirements of the problem to be solved. Then the graph matching algorithm is employed to match the already existed semantic nets of computer vision system. The enquiry part of the subsemantic network is the solution if it matches the semantic network graph successfully. The problem of map matching can be resolved by the construction of a data structure of associate graph. For two graphs, G=(V, A) and G′=(V′,A′), we can construct an associate graph G″=(V″,A″), in which V″ is of all possible matching set nodes, and A″ is of all compatible matching set nodes. It is equivalent to find a maximum clique in the associate graphs, clique is defined as a completely connected subgraph of Equates G″. The largest clique meets the criterion that its node sets are not of approximate subsets of any other clique.
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Call flow obfuscation technique for Java program
Zhang Xue-song, Lu Yi-nan, Cui Wei-li
吉林大学学报(工学版). 2008, 38 (增刊):  150-0155.  DOI:
Abstract ( 2329 )   PDF (471KB) ( 522 )  
A Java program obfuscation technique was proposed. It extracts the codes of some methods in user defined classes, and then embeds the codes into the methods of some other objects in the object pool. Since all objects in the class pool are upcast to their common base class, the polymorphism of the method leads to that which object method will be executed can only be ascertained at runtime. Thus, the program call flow can be drastically obscured to prevent static analysis. In cooperation with other enhanced mechanisms, this technique can even resist dynamic analysis to a certain extent. Experiments show that the influence of the transformed program on execution efficiency is insignificant.
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New method for simplification of 3D scattered points
Quan Yong，Li Wen-hui，Lu Yi-nan，Zhang Zhen-hua
吉林大学学报(工学版). 2008, 38 (增刊):  156-0162.  DOI:
Abstract ( 3011 )   PDF (604KB) ( 598 )  
A new method for removing redundant points from 3D scattered point sets is presented. A novel point primitive, referred as Spherical Patch Point, is employed to approximate a 3D point and its vicinity. Due to the property of curvature, this new method can deliver similar visual quality with much less primitives in comparison with other pointbased methods. Global illumination is used to render 3D models. The proposed simplification method is tested using largescale point data, and the results verify its effectiveness. Using the new method can reduce 40% of the original points, meanwhile, ensures the similar visual appearances.
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Assembly controller interface design of HEV based on MotorolaMPC565
Zheng Kai，Zhao Hong-wei，Zhang Xiao-lin，Chen Peng
吉林大学学报(工学版). 2008, 38 (增刊):  163-0167.  DOI:
Abstract ( 1991 )   PDF (385KB) ( 439 )  
The MotorolaMPC565, a 32 bits micro controller, is used in the hardware system design of HEV assembly controller. On the basis of the requisition analysis of the assembly controller, the overall design scheme and developing platform of the hardware system are built. In order to strengthen the reliability several antijamming measures are taken into consideration in the hardware design. Experiment results show that the designed controller works stably and its reliability and efficiency are higher than other similar products.
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Algorithm ROI extraction and encoding in infrared
videoguided missile searching target
Bai Xu，Zhang Zhong-zhao，Gao Yu-long，Ma Lin
吉林大学学报(工学版). 2008, 38 (增刊):  168-0171.  DOI:
Abstract ( 2176 )   PDF (496KB) ( 435 )  
A target searching scheme called ROI algorithm on the basis of automatic luminance value detection for video-guided missile was proposed. An implicit ROI coding algorithm in EBCOT was improved for better searching performance. The priority of background coefficient in ROI code block can be largely reduced when the improved algorithm was used. Therefore, the interest region can be encoded at a higher quality level which makes high quality images display at low channel rate possible and facilitates fast and accurate manual guide. And comparison of three coding schemes, EBCOT, implicit ROI, and the improved ROI method was conducted, which demonstrates that the proposed algorithm possesses higher compression efficiency, lower complexity as well as good reconstructed ROI images quality in lower channel capacity for videoguided missile in small target searching in wide background environment.
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An optimal design criterion for parameters OFDM
systems parameters under phase noise
Wang Yong, Ge Jian-hua, Nie Yuan-fei
吉林大学学报(工学版). 2008, 38 (增刊):  172-0176.  DOI:
Abstract ( 2302 )   PDF (678KB) ( 522 )  
Due to the fact that the intercarrier spacing in OFDM is relatively small, OFDM transceivers are somewhat more sensitive to phase noise compared to single carrier transceivers. Thus this problem must be carefully considered in designing an OFDMbased system since an accurate prediction of the tolerable phase noise can allow designer to relax system specifications. According to spectrum theorem, two components of phase noise were analyzed: common phase error and intercarrier interference. On the basis of the analysis, the performance of OFDM was given for the case where phase noise has been added to the signal, and an optimal design criterion for OFDM parameters was proposed that allows to improve the phase noise error correcting capabilities in OFDM receiver.
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Auditory filter bank model based on wavelet transform
Gao Yin-han, Xie Jun, Liang Jie, Li Qiang
吉林大学学报(工学版). 2008, 38 (增刊):  177-0181.  DOI:
Abstract ( 2004 )   PDF (528KB) ( 871 )  
The auditory filler bank models were studied. The Gammatone auditory filter bank model and the Gauss auditory filter bank model based on the wavelet transform were analyzed comparatively, their predicted hearing threshold curves were presented and compared with the standard one. It was found that the Gauss wavelet auditory filler bank is closer to the human ear filter result. The characteristic loudnesses predicted by the Gauss wavelet auditory filter bank model was compared with the results calculeted by the softwave Artemis of Head Acoustics Co., Germany, the differences were below 0.6 sone.
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Calibration method for CCD laser diffraction filament
diameter measurement system
He Li-qiao，Gao Yan，Wang Guo-guang
吉林大学学报(工学版). 2008, 38 (增刊):  182-0184.  DOI:
Abstract ( 3251 )   PDF (343KB) ( 653 )  
：Two new calibration methods for the charge coupled divice(CCD) laser diffraction system to measure the filament diameter in the range of 10~40 μm were proposed, and the systems with different calibration methods were tested comparatively. The results show that the system accuracy can reach 0.15 μm under appropriate calibration.
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SVM based large signal behavior modeling for RF power components
Hua Xiao-jie，Lin Mao-liu
吉林大学学报(工学版). 2008, 38 (增刊):  185-0189.  DOI:
Abstract ( 1885 )   PDF (692KB) ( 462 )  
Since single S parameter is not sufficient for the description and interpretation for large signal network analysis, A SVM based nonlinear scattering function was presented to describe large signal nonlinear characteristic and build accurate model of RF power components. Actual experimental results prove the validation of the model.
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Robust stabilization of uncertain sampleddata
system with timevarying delay
Xie Wei-nan，Qu Zhen-shen，Wen Qi-yong，Wang Chang-hong
吉林大学学报(工学版). 2008, 38 (增刊):  190-0194.  DOI:
Abstract ( 1876 )   PDF (555KB) ( 505 )  
Problem of robust stabilization for uncertain sampleddata systems with timevarying delay was studied. Through introducing a free variable, a new Lyapunov asymptotical stability criterion with less conservativeness was established. Based on the criterion, delaydependent sufficient conditions on robust stabilization for the systems were obtained by using linear matrix inequality technique. Compared with a previous result, one example was provided to show the reduced conservatism of the proposed approach.
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Attitude maneuvering intelligent control of flexible spacecraft
with dead zone input nonlinearity
Zhu Liang-kuan，Ma Guang-fu，Hu Qing-lei
吉林大学学报(工学版). 2008, 38 (增刊):  195-0200.  DOI:
Abstract ( 2030 )   PDF (722KB) ( 473 )  
An intelligent control algorithm combining variable structure control and neural network for attitude maneuvering of a threeaxis stabilized flexible spacecraft with dead zone nonlinear input induced by flywheel reaction was proposed. First, a variable structure output feedback control law was designed on the basis of nonlinear and lower order mode of the spacecraft dynamic model. Then an existing slide condition and closedloop asymptotical stability condition were given. Furthermore, network adaptive control technique was used to compensate system uncertainties and the stability analysis was conducted by using Lyapunov function. The introduction of intelligent control ensures the controller a good ability of selflearning and adaptation so that the influence of the uncertainty to the system was effectively reduced. Finally, the numerical simulations to the spacecraft were p
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EHV magnetically controlled reactor for suppressing interior
overvoltage and secondary arc current
Yao Yao, Chen Bai-chao, Tian Cui-hua
吉林大学学报(工学版). 2008, 38 (增刊):  201-0208.  DOI:
Abstract ( 1956 )   PDF (570KB) ( 499 )  
In order to solve the problem that fixed shunt reactors applied in extrahigh voltage transmission lines significantly restrict transmitted power and result in excessively low voltage, a scheme of using magnetically controlled reactor (MCR) was put forward. First, MCR structure and essential working principle were introduced, and its model was build based on small slope magnetization curve The analysis of the characteristics of MCR focusing on harmonic distribution, voltagecurrent property, control law and response time were conducted. Theoretical formulae were given for the selection of neutral grounding of MCR. By using Electromagnetic Transient Program (EMTP), simulation model of 500kV transmission line from Sanyou to Jiangling was built to study control effects on frequency overvoltage, switching overvoltage suppression and secondary arc current limitation. Simulation results indicate that MCR can smooth voltage and regulate reactive power, suppress power frequency and switching overvoltage, limit secondary arc current during single phase fault reclosing, which show the feasibility and effectiveness of MCR applications in extrahigh voltage transmission line.
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Antioxidant activity of Rhodiola extracts from different regions
Bi Hui-min，Zhang Shou-qin，Liu Chang-jiao
吉林大学学报(工学版). 2008, 38 (增刊):  209-0213.  DOI:
Abstract ( 2393 )   PDF (422KB) ( 444 )  
The flavone contents and antioxidant activities of the extracts of Rhodiola grown in Jilin, Shanxi and Yunnan provinces were compared. Results show that the Rhodiola from Yunnan has contains highest flavone content. It was found that when the concentration of the extracts reaches 0.05 mg/mL, the DPPH radial scavenging activities are in the order: Vc>Jilin Rhodiola>Yunnan Rhodiola>Shanxi Rhodiola>TBHQ. When the concentration reaches 1.0 mg/mL, the hydroxyl radical scavenging activities are in the order: Vc>Jilin Rhodiola>TBHQ>Shanxi Rhodiola>Yunnan phodiola, and the order of the reducing power is Vc>TBHQ>Sanxi Rhodiola>Jlin Rhodiola>Yunnan Rhodiola. When the concentration reaches 0.5 mg/mL, the liposome oxidation inhibitory activities are in the order: Jilin Rhodiola>Shanxi Rhodiola>Yunnan Rhodiola>TBHQ>Vc. The extract of Rhodiola is a potential natural antioxidant that can be used in food industry.
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Effect of extraction technology on the stability and antioxidant
activity of extract of Hedyotis diffusa willd
Yan Hong-sen，Zhang Shou-qin，Hou Li-li，Luo Xiao-pei1，Liang Qing
吉林大学学报(工学版). 2008, 38 (增刊):  214-0218.  DOI:
Abstract ( 1784 )   PDF (414KB) ( 526 )  
The effects of three extraction methods: reflux, ultrasonicassistant and high hydrostatic pressure on the yields of flavones and pcoumaric acid of Hedyotis diffusa willd were investigated. Results show that the yields of flavones are 1.305% by reflux, 1.301% by high hydrostatic pressure and 1.258% by ultrasonic extraction respectively; the yields of pcoumaric acid are 0.123% by ultrasonic, 0.111% by relux and 0.098% by high hydrostatic extraction respectively. In regard to the yields of flavones and pcoumaric acid, the effects of the three extraction methods show no significant difference, which is mainly the test error. The variations of pH value of the extracted liquid by the three methods were measured. It is shown that the extracted liquid by high hydrostatic pressure is stable and that by the other two methods are not stable. The assays of DPPH radical and hydroxyl radical scavenging activity show that the effects of the three methods on the antioxidant activity of the extracted liquid are in the order from high to low: high hydrostatic pressure, ultrasonic and reflux.
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Research of a new FPS agent performance
Li Yi-qiang，Duan Ya-jie，Meng Xiang-tai, Yu Yan-qing, Jiang Ji-shui
吉林大学学报(工学版). 2008, 38 (增刊):  219-0224.  DOI:
Abstract ( 2059 )   PDF (525KB) ( 565 )  
A new type of single component chemical displacing agent 108 twinned FPS was polymerized which grafts the specially designed and optionized functional groups on the polycrylamide hydrocarbon chain. Its emulsifying performance and viscosity aging stability were invertigated, and a laboratory physical simulation oil displacement experiment was perfrmed. The results indicat that the FPS is characterized by the strong saltresisting, antioxidating and antibiodegradation performances, being suitable to prepare with the oil field waste water. It also possesses the oil solubility, emulsifiability, and viscosity enhancement properties, has better oil displacement effect than common polymer and ASP system.
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