High speed tracking control of ball screw drives

5th Asia Conference on Mechanical and Materials Engineering

机械制造;材料科学

Liu, Chao-Yi^1 ; Huang, Ruei-Yu^1 ; Lee, An-Chen^1

National Chiao Tung University, Department of Mechanical Engineering, Hsinchu

30010, Taiwan^1

关键词: Ball-screw drives;    Coprime factorizations;    Disturbance observer;    Feed-forward controllers;    High speed tracking controls;    Position controller;    Structural damping;    Tracking performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/241/1/012030/pdf
DOI  :  10.1088/1757-899X/241/1/012030

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper presents a new method to achieve the requirement of high speed and high precision for ball screw drive. First, a PI controller is adopted to increase the equivalent structural damping in the velocity loop. Next, the design of the position controller is implemented by a two-stage method. The Doubly Coprime Factorization Disturbance Observer (DCFDOB) is developed to suppress disturbance and resist modelling error in the inner loop, while the outer loop is then designed based on method to extend the system bandwidth over first resonant frequency so that high speed and high accuracy can be achieved. Finally, a feedforward controller is implemented to improve tracking performance. The experiment results showed that the proposed method has smaller tracking error and better performance for suppressing disturbance when compared to the conventional cascaded P-PI control.