Discrete-time proportional and integral observer and observer-based controller for systems with both unknown input and output disturbances

Zhiwei Gao, Tim Breikin, Hong Wang

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

In this paper, a novel discrete proportional and integral observer is proposed for estimating the system state, input and output disturbances at the same time. Compared with the previous results, the proposed observer has an advantage in handling output disturbances. A simulated numerical example is given to demonstrate the efficiency. By using the estimates of the state and disturbance, an observer-based controller with disturbance accommodation is designed to ensure the system stability and to satisfy the specified performance index. A simulated study of a reduced-order gas turbine discrete model is given to illustrate the design approach, and encouraging simulation results are obtained. Copyright q 2007 John Wiley & Sons, Ltd
Original languageEnglish
Pages (from-to)171-189
JournalOptimal Control Applications and Methods
Volume29
Issue number3
DOIs
Publication statusPublished - 2008

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