platform with high frequency and fast response

ZHENG Bin, SHI Weimin, YANG Liangliang

(School of Machinery and Automatic Control, Zhejiang SciTech University, Hangzhou 310018, China)

Abstract: Aiming at the problem of resonance of the platform of the motion control with high frequency and fast response driven by linear motor, research on the servo control system model, the model of the servo dynamic stiffness, quality of moving parts, online identification algorithm and resonance suppression method of integral resonant control (IRC), a control scheme based on online identification model of recursive least squares identification algorithm and resonance suppression of IRC was proposed. The servo control system model and the model of the servo dynamic stiffness were constructed, based on the simulation, the platform of the motion control with high frequency and fast response driven by linear motor was studied considering the influence of quality change of moving parts on the servo dynamic stiffness and the influence of the servo dynamic stiffness of the control system on the resonance, IRC was designed to suppress resonance on the base of utilizing parameters of resonance model from online identification. The results indicate that the control scheme has a good effect on suppressing resonance which is caused by insufficient of the servo dynamic stiffness, and can greatly improve the dynamic performance of system.

 

Key words: linear motor; resonance; integral resonant control (IRC); servo dynamic stiffness; quality of moving parts; suppress