Affiliation:
1. College of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China
Abstract
Aiming at the output torque error of a steering gear electric load simulator caused by excess torque and backlash interference, an electric load simulator based on double-motor loading is designed. The double-motor loading mode is adopted in the structure, the mathematical model is established, and the sources of excess torque and backlash interference are analyzed. In the control strategy, firstly, a torque controller is designed as a feedback controller based on the improved error symbol robust integral control method, and then a backlash interference compensator is designed as a feedforward controller based on the drive redundancy strategy. Finally, a dual motor speed synchronization controller is designed based on the improved cross coupling control method to ensure the stable operation of the torque controller and backlash compensator in the dual-motor system. The simulation results show that the compound control method can reduce the tracking error to 1.13%, 4.44% less than the PID control method. The tracking error is only 1.54% in the case of redundant torque, backlash, and different parameters of dual motors. The method proposed in this paper can still output loading torque with high accuracy.
Funder
Tianjin Natural Science Foundation
Reference28 articles.
1. Model Error Analysis of Load Simulator System;Zheng;J. Phys. Conf. Ser.,2020
2. Robust hybrid control based on PD and novel CMAC with improved architecture and learning scheme for electric load simulator;Yang;IEEE Trans. Ind. Electron.,2014
3. Mechanism and suppression of extraneous torque of motor driver load simulator;Li;J. Beijing Univ. Aeronaut. Astronaut.,2006
4. Estimation for performance of load simulator;Jiao;Chin. J. Mech. Eng.,2002
5. Research of a dynamic measuring method of moment of inertia and an elimination method of plus torque in electric loading system;Gao;Comput. Meas. Control,2005