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Reduced-Order Observer Design for Servo System Using Duality to Discrete-Time Sliding-Surface Design

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3 Author(s)
Mehta, A.J. ; G.H. Patel Coll. of Eng. & Technol., Vallabh Vidhyanagar, India ; Bandyopadhyay, B. ; Inoue, A.

This paper presents a design method of a discrete-time reduced-order observer using the duality to discrete-time sliding-surface design. First, the duality between the coefficients of the discrete-time reduced-order observer and the sliding-surface design is established, and then, the design method for the observer using the Riccati equation is explained. A discrete-time sliding-mode controller based on the proposed observer is designed and tested on a laboratory-type experimental servo system. The results show the efficacy of the reduced-order observer designed by the duality concept.

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Industrial Electronics, IEEE Transactions on  (Volume:57 ,  Issue: 11 )