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Definition
This essay presents feed drive control systems used in modern CNC machine tools. Considering the rigid body motion of the feed drive, widely used control algorithms such as P-PI and PID control are being introduced. At last, the sliding mode control algorithm is presented, and its performance against the conventional PID control is shown.
Theory
In general context, a control system is a device to manage, command, or regulate the behavior of another device or a system. In CNC machine tool systems, the objective of the control system is to regulate the actual position of the feed drive to follow the reference motion trajectory programmed by the user. Hence, the control law on a machine tool tries to minimize deviation of the drive position xm(t) from the commanded position xr(t).
Dynamic Model of Feed Drive
Considering a widely used ball screw feed drive design, the system consists of...
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© 2019 CIRP
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Sencer, B. (2019). Control. In: Chatti, S., Laperrière, L., Reinhart, G., Tolio, T. (eds) CIRP Encyclopedia of Production Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-53120-4_6525
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DOI: https://doi.org/10.1007/978-3-662-53120-4_6525
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-53119-8
Online ISBN: 978-3-662-53120-4
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