摘要
磁悬浮轴承-转子系统在高速工作时,多种工况均会对系统存在外部引入的低频正弦干扰。针对此类问题,设计干扰观测器对外部干扰进行抵消,设计H_(∞)对系统中存在的未建模动态、参数和结构的不确定性进行抑制,使得系统具有更好的鲁棒性和抗干扰性能。建立磁悬浮轴承-转子系统的数学建模,设计基于H_(∞)和干扰观测器的复合控制器。仿真与实验结果表明:干扰频率在20 Hz~50 Hz范围内,相比于传统的H_(∞)控制器,复合控制器具有更好的抗干扰性能。
Aimed at the external low-frequency sinusoidal disturbance of magnetic bearing rotor system working at high speed under various working conditions,the disturbance observer is designed to counteract the external disturbance,and the H_(∞)is designed to suppress the uncertainties of unmodeled dynamics,parameters and structure,obtaining better robustness and anti-interference performance of the system.The mathematical model of the magnetic bearing rotor system is established,and the composite controller based on H_(∞)and disturbance observer is designed.The simulation and experiment results show that the composite controller,with the disturbance frequency within 20 Hz-50 Hz,has better anti-disturbance performance than the traditional H_(∞)controller.
作者
周衡
金超武
ZHOU Heng;JIN Chaowu(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《机械制造与自动化》
2022年第3期149-151,158,共4页
Machine Building & Automation
基金
国家自然科学基金项目(5187051379)。
