Abstract A novel iterative learning algorithm is proposed for the identification of linear time-varying (LTV) output-error (OE) systems that perform tasks repetitively over a finite-time interval. Conventional LTV system identification normally relies on recursion algorithms in time domain, which are unable to follow fast changing parameters because of an inevitable estimation lag. To overcome this problem, an extra iteration axis is introduced besides the time axis in the parameter estimation process, and identification algorithm performed in iteration domain is proposed. Firstly, a norm-optimal identification approach is presented to balance the tradeoff between convergence speed and noise robustness. Then a bias compensation algorithm is further proposed to improve the estimation accuracy. Finally, numerical examples are provided to validate the algorithm and confirm its effectiveness. The algorithm is effective to estimate both slow and abrupt parameter changes with high accuracy without estimation lags.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Iterative Learning Identification with Bias Compensation for Stochastic Linear Time-Varying Systems


    Contributors:
    Song, Fazhi (author) / Liu, Yang (author) / Yang, Zhile (author) / Yang, Xiaofeng (author) / He, Ping (author)


    Publication date :

    2017-01-01


    Size :

    9 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




    New Compensation Method of Magnetometer Time-varying Bias for UAV

    No, Heekwon / Cho, Am / Kee, Changdon | British Library Conference Proceedings | 2018



    A high-order internal model based iterative learning control scheme for discrete linear time-varying systems

    Zhou, W. / Yu, M. / Huang, D. Q. | British Library Online Contents | 2015


    Observer-based adaptive iterative learning control for nonlinear systems with time-varying delays

    Chen, W. S. / Li, R. H. / Li, J. | British Library Online Contents | 2010


    On Iterative Learing Control of Time Varying Systems

    Ji, Xiaoqiang / Longman, Richard W. | AIAA | 2018