Precise Compound Control of Loading Force for Electric Load Simulator of Electric Power Steering Test Bench

被引：0
作者：
Changhua Dai
Guoying Chen
Changfu Zong
Buyang Zhang
机构：
[1] Jilin University,College of Automotive Engineering
[2] Jilin University,State Key Laboratory of Automotive Simulation and Control
来源：
Chinese Journal of Mechanical Engineering | 2022年 / 35卷
关键词：
Electric load simulator; Electric power steering; Extra force; Compound control;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Electric load simulator (ELS) systems are employed for electric power steering (EPS) test benches to load rack force by precise control. Precise ELS control is strongly influenced by nonlinear factors. When the steering motor rapidly rotates, extra force is directly superimposed on the original static loading error, which becomes one of the main sources of the final error. It is key to achieve ELS precise loading control for the entire EPS test bench. Therefore, a three-part compound control algorithm is proposed to improve the loading accuracy. First, a fuzzy proportional–integral plus feedforward controller with force feedback is presented. Second, a friction compensation algorithm is established to reduce the influence of friction. Then, the relationships between each quantity and the extra force are analyzed when the steering motor rapidly rotates, and a net torque feedforward compensation algorithm is proposed to eliminate the extra force. The compound control algorithm was verified through simulations and experiments. The results show that the tracking performance of the compound control algorithm satisfies the demands of engineering practice, and the extra force in the ELS system can be suppressed by the net torque corresponding to the actuator’s acceleration.
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