Control of large model mismatch systems using multiple models

Document Type

Article

Publication Date

8-1-2017

Abstract

H∞ control is an effective approach to handle model uncertainties. However, when modeling mismatch is large, it tends to be challenging to meet the desired requirements of both stability and performance by only using a single H∞ controller. This study presents a switching method to enhance the robust stability and performance of H∞ control by dividing the range of dynamics into multiple uncertain models. The candidate robust controllers are designed by solving a set of linear matrix inequalities for each uncertain model. A structural scheduling logic that selects the most proper controller into closed-loop is proposed. The selected controller can ensure bounded exponentially weighted H∞ norm of the closed-loop switching systems. This work analyses their robust stability and disturbance attenuation performance via a linear fractional transformation by using the small gain theorem. The effectiveness of this method is validated with a fist-order inertial system with pure time delay.

Identifier

85025164618 (Scopus)

Publication Title

International Journal of Control Automation and Systems

External Full Text Location

https://doi.org/10.1007/s12555-016-0093-8

e-ISSN

20054092

ISSN

15986446

First Page

1494

Last Page

1506

Issue

4

Volume

15

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