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A discrete iterative learning control for a class of nonlinear time-varying systems

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1 Author(s)
Chiang-Ju Chien ; Dept. of Electron. Eng., Hua Fan Univ., Taipei, Taiwan

A discrete iterative learning control is presented for a class of discrete-time nonlinear time-varying systems with initial state error, input disturbance, and output measurement noise. A feedforward learning algorithm is designed under a stabilizing controller and is updated by more than one past control data in the previous trials. A systematic approach is developed to analyze the convergence and robustness of the proposed learning scheme. It is shown that the learning algorithm not only solves the convergence and robustness problems but also improves the learning rate for discrete-time nonlinear time-varying systems

Published in:

IEEE Transactions on Automatic Control  (Volume:43 ,  Issue: 5 )