Hybrid robust output tracker design for sampled-data systems using digital redesign of sliding mode control

Jiunn Shiou Fang, Jason Sheng Hong Tsai, Jun Juh Yan, Chiao Hsin Huang, Shu Mei Guo

Research output: Contribution to journalArticlepeer-review

Abstract

This paper is mainly concerned with the design of a hybrid robust output tracker for a class of systems with a direct feed-through term and bounded matched nonlinear disturbances. First, we present a continuous-time linear quadratic analog tracker (LQAT) based on sliding mode control (SMC), and the existence of sliding manifold is guaranteed with the proposed controller in the continuous-time domain. After designing the continuous-time SMC-based tracker, a digital redesign approach using Euler's approximation method is newly proposed to directly obtain a discrete-time SMC-based tracker from the continuous-time SMC-based tracker, and the hitting condition is also satisfied such that the existence of sliding manifold is guaranteed in the hybrid controlled systems. Therefore, the output tracking performance with the proposed discrete-time SMC-based tracker can be also satisfied as the continuous-time SMC-based tracker. Illustrative examples are given to demonstrate the success of the proposed digital-redesign-based SMC algorithm.

Original languageEnglish
JournalAsian Journal of Control
DOIs
Publication statusAccepted/In press - 2020

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering

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