交流伺服系统的鲁棒性研究

he robustness design of the AC position servo system is presented in this paper. The AC position servo system is extensively used in the industrial control system. The disturbance is the main factor which influences the performance of the system, and a disturbance observer is used to compensate the disturbance generated by the variation in load, the change in operation condition and structure uncertainty in modeling in the AC servo system. The design methods and principles of the disturbance observer are discussed. When the model parameter of the actual plant exceeds the stability range, the on-line identification scheme is adopted first to identify model parameter of the servo system, and the nominal model of the disturbance observer is modified to the identification values. The research proves that the AC position servo system adopted by the disturbance observer and the parameter on-line identification scheme can provide strong robustness to the parameter variation.