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A Data-Driven Constrained Norm-Optimal Iterative Learning Control Framework for LTI Systems

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3 Author(s)
Janssens, P. ; Dept. of Mech. Eng., Katholieke Univ. Leuven, Leuven, Belgium ; Pipeleers, G. ; Swevers, J.

This brief presents a data-driven constrained norm-optimal iterative learning control framework for linear time-invariant systems that applies to both tracking and point-to-point motion problems. The key contribution of this brief is the estimation of the system's impulse response using input/output measurements from previous iterations, hereby eliminating time-consuming identification experiments. The estimated impulse response is used in a norm-optimal iterative learning controller, where actuator limitations can be formulated as linear inequality constraints. Experimental validation on a linear motor positioning system shows the ability of the proposed data-driven framework to: 1) achieve tracking accuracy up to the repeatability of the test setup; 2) minimize the rms value of the tracking error while respecting the actuator input constraints; 3) learn energy-optimal system inputs for point-to-point motions.

Published in:

Control Systems Technology, IEEE Transactions on  (Volume:21 ,  Issue: 2 )

Date of Publication:

March 2013

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