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High-performance tracking controller for discrete plant using nonlinear sliding surface
Published in
Volume: 56
Issue: 9
Pages: 3628 - 3637
A nonlinear sliding surface is proposed to improve the transient response for general discrete multiple-input-multiple-output linear systems with matched perturbations. The tracking case is analyzed, and it is shown that the scheme is able to achieve low overshoot and low settling time simultaneously; this is not possible with a linear sliding surface. The control law is based on the discrete-time sliding mode equivalent control and thus eliminates chattering. The control law is proposed based on two approaches: 1) reaching-law-based approach which needs only disturbance bounds and 2) disturbance-observer-based approach. Multirate output feedback is used to relax the need of the entire state vector for the implementation of the control law. A magnetic tape position control application is used to show the effectiveness of the proposed scheme. © 2009 IEEE.
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JournalIEEE Transactions on Industrial Electronics