惯性质量对齿轮齿条式作动器阻尼特性的影响

doi:10.13229/j.cnki.jdxbgxb20171291

Abstract

Abstract:

An actuator based on the structure of servo motor and rack and pinion is designed. The two components of actuator damping force are analyzed theoretically, which are mechanical friction damping force and inertia force, and their calculation methods are given respectively. Compared with the traditional passive damping force, the influence of the inertial mass on the damping characteristics of the actuator is analyzed through typical sinusoidal excitation, and further verified by bench test. The test results show that the calculation method of damping force is reasonable, can match the actual damping force of the actuator well. However, it is also found that the inertial mass of the actuator results in the rise of the maximum damping force and the nonlinear characteristic which goes against its active control. Moreover, the idle stroke of the structure leads to obvious fluctuation of the damping force in the process of high frequency reversing. So, in the process of actuator structure design, it should be considered to reduce the inertial mass and idle stroke by optimal design.

Key words: mechanical design, rack and pinion actuator, bench test, inertial mass, damping characteristic, mechanical friction force

CLC Number:

TH703

Xing⁃ye WANG,Jin⁃qiu ZHANG,Guo⁃qiang LI,Zhi⁃zhao PENG. Influence of inertial mass on rack and pinion actuator′s damping characteristic[J].Journal of Jilin University(Engineering and Technology Edition), 2019, 49(3): 881-887.

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参数	符号	数值
额定输出功率/W	P_me	1000
额定扭矩/（N·m）	T_me	3.18
额定转速/（r·min^?1）	n_me	3000
转动惯量/（kg·m^?2）	J_m	1.36×10^?4

参数	符号	数值
额定输出扭矩/（N·m）	T_re	130
额定输入转速/（r·min^?1）	n_re	3000
转动惯量/（kg·m^?2）	J_r	0.5×10^?4
减速比	i	16

Influence of inertial mass on rack and pinion actuator′s damping characteristic

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