吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (2): 583-590.doi: 10.13229/j.cnki.jdxbgxb201702033

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Design of nonlinear reduced-order observer for ammonia coverage based on urea-SCR systems

ZHAO Jing-hua1, 2, 3, HU Yun-feng1, 3, GAO Bing-zhao1, CHEN Hong1, 3   

  1. 1.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;
    2.College of Computer, Jilin Normal University, Siping 136002, China;
    3.College of Communication Engineering, Jilin University, Changchun 130022, China
  • Received:2016-01-04 Online:2017-03-20 Published:2017-03-20

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Abstract: For ammonia coverage of urea-SCR systems, whose state is not measurable, a reduced-order observer method based on Input-to-state Stability (ISS) is proposed. The errors of sensor measurement including temperature, exhaust gas flow rate are considered as additional disturbance inputs. The observer is designed in order that the error dynamics is input-to-state stable, and the guideline for selecting the controller parameters is given. The transient performance of the proposed observer is tested on an validated enDYNA diesel model with urea-SCR aftertreatment systems. Comparing with common mechanism observer, the proposed observer has better performance.

Key words: artificial intelligence, reduced-order observer, nonlinear, input-to-state stability(ISS), ammonia coverage estimator

CLC Number: 

  • TP273
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