Novel Sliding Mode Control for Ball Screw Servo System
1 School of Information Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
2 Institute of Advanced Manufacturing Technology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Changzhou, Jiangsu, China
This paper presents a novel sliding mode control to achieve a high positioning accuracy for ball screw servo system. A two-degree-of-freedom (2-DOF) model with time-varying parameter uncertainties and disturbance is firstly built to describe the first axial mode resonance for the ball screw servo system. A novel nonlinear sliding mode control is designed for the system with better transient response of fast response and non-overshoot. The stability of the nonlinear sliding-mode surface and controller are verified based on the Lyapunov function. The frequency response experiment result indicates that the system modelling is accurate enough and the simulation result shows that the tracking accuracy for ball screw servo system is improved with the proposed controller.
Key words: ball screw servo system / sliding mode control / nonlinear sliding-mode surface / modeling
© Owned by the authors, published by EDP Sciences, 2016
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