Estimation delay compensation in high-gain observer-based parameter identification

Xuewu Dai, Zhiwei Gao, Tim Breikin, Hong Wang

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    In this paper, the properties of the disturbance estimation in a high gain observer are analyzed, and a time delay calculation method is proposed to improve the performance of parameter identification. This paper shows that the estimation delay depends on the observer gain, but has nothing to do with the parameter variation. Then, a novel algorithm is proposed to calculate the delay according to the phase response of disturbance estimation transfer function. Hence, in terms of system identification, this delay is compensated by lagging the state estimate by the same amount of delay. This technique, on one side, improves the performance of parameter identification accuracy, and, on the other side, gives a new insight into the high-gain observer design. ©2009 IEEE.
    Original languageEnglish
    Title of host publicationProceedings of the IEEE Conference on Decision and Control|Proc IEEE Conf Decis Control
    Pages8212-8217
    Number of pages5
    DOIs
    Publication statusPublished - 2009
    Event48th IEEE Conference on Decision and Control held jointly with 2009 28th Chinese Control Conference, CDC/CCC 2009 - Shanghai
    Duration: 1 Jul 2009 → …

    Conference

    Conference48th IEEE Conference on Decision and Control held jointly with 2009 28th Chinese Control Conference, CDC/CCC 2009
    CityShanghai
    Period1/07/09 → …

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