Study and Experimental Verification on Anti-Disturbance Control Strategy for Electro-Mechanical Servo Systems

被引:0
|
作者
Zheng, Shicheng [1 ,2 ]
Wang, Deyi [3 ]
Wei, Jingkun [4 ]
Yang, Yunjie [1 ,2 ]
Zhu, Jihong [1 ,2 ]
机构
[1] Tsinghua Univ, Dept Precis Instrument, Beijing 100084, Peoples R China
[2] State Key Lab Precis Space Time Informat Sensing T, Qinghua Garden, Chengfu Rd, Beijing 100084, Peoples R China
[3] Beijing Aerosp Automatic Control Inst, Natl Key Lab Sci & Technol Aerosp Intelligence Con, Beijing 100854, Peoples R China
[4] Beihang Univ, Sch Mech Engn & Automat, 37 Xueyuan Rd, Beijing 100191, Peoples R China
基金
中国国家自然科学基金;
关键词
electro-mechanical actuator; anti-disturbance control strategy; mathematical model; simulation analysis; experimental test; ACTUATOR; SIMULATION;
D O I
10.3390/act13090377
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
With technological advances and industrial upgrading, electro-mechanical actuators (EMAs) have gradually replaced traditional hydraulic actuation systems. During operation, force servo systems inevitably suffer from external force or position disturbances, thus affecting the output performance of the system. Therefore, it is of significant engineering application value to develop EMA anti-disturbance control strategies that exhibit strong robustness and are more easily applicable to engineering practice. In this study, an open-loop transfer function of the system with command signals and disturbance signals as inputs was established based on the nonlinear mathematical models built for the core components of EMAs. To overcome the impact of external position disturbances on the motion performance of the force servo system, a proportional integral derivative (PID) controller was introduced and a high-order transfer function associated with various parameters such as speed and acceleration was derived and obtained as feedforward compensation based on the mathematical model. By incorporating a three-loop PID controller, the impact of external disturbance forces on the motion performance of the position servo system was overcome and the tracking accuracy of the system was also improved. Finally, simulation models were built using AMESim software (AMESim 2020, LMS Imagine.Lab, Roanne, France) and a dual-channel EMA performance testing system was developed. Simulation and test results indicated that both anti-disturbance control methods exhibited strong robustness and excellent anti-disturbance performance, with the control accuracy and dynamic performance almost unaffected by disturbances. This verified the correctness of the single-channel EMA anti-disturbance control strategy and the usability of the simulation model.
引用
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页数:22
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