A Linear Cross-Coupled Control System for High-Speed Machining |
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Authors: | Q Zhong Y Shi J Mo S Huang |
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Affiliation: | (1) Department of Material Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, PR China, CN |
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Abstract: | We present a linear cross-coupled controller to improve highspeed contouring accuracy independently of tracking accuracy in
a biaxial machine tool feed drive servomechanism. Unlike conventional cross-coupled controllers, the cross-coupled controller
presented here is a linear system, so it is very easy to perform the stability and steady-state error analysis, and to optimise
the controller parameters. The proposed controller is evaluated experimentally on a CNC LOM machine and compared to an uncoupled
controller and a conventional cross-coupled controller. Controller performance is evaluated for a circular contour at a feedrate
of 30 m min _1 . The experimental results show that the proposed controller can greatly reduce the contour error at large feedrates. The
linear cross-coupled controller is simple to implement and is practical. |
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Keywords: | : Computer numerical control Contour error Highspeed machining PID algorithms |
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