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The Scientific World Journal - Volume 2014 2014, Article ID 658497, 8 pages -

Research Article

Faculty of Electronics Engineering, GIKI, Topi, Pakistan

Sultan Qaboos University, Muscat, Oman

Received 4 August 2013; Accepted 27 October 2013; Published 19 January 2014

Academic Editors: S. Berretti and D. K. Iakovidis

Copyright © 2014 Muhammad Amir Shafiq et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In direct adaptive inverse control DAIC, parameters of the controller are estimateddirectly in the feed-forward loop. In this paper, we propose a closed loop direct adaptive inversecontrol CDAIC scheme which improves tracking, error convergence, and disturbance rejectionproperties of DAIC. CDAIC is applicable to stable or stabilized, minimum or nonminimumphase linear plants. CDAIC and DAIC are compared using computer simulations for disturbancefree and disturbed discrete type nonminimum phase linear plants. CDAIC shows better resultscompared to DAIC in terms of mean square tracking error and disturbance rejection.

Autor: Muhammad Amir Shafiq, Muhammad Shafiq, and Nisar Ahmed



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