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Optimal control synthesis of a class of nonlinear systems using single network adaptive critics

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3 Author(s)
Padhi, R. ; Dept. of Mech. & Aerosp. Eng., Missouri Univ., Rolla, MO, USA ; Unnikrishnan, Nishant ; Balakrishnan, S.N.

Adaptive critic (AC) neural network solutions to optimal control designs using dynamic programming has reduced the need of complex computations and storage requirements that typical dynamic programming requires. In this paper, a "single network adaptive critic" (SNAC) is presented. This approach is applicable to a class of nonlinear systems where the optimal control (stationary) equation is explicitly solvable for control in terms of state and costate variables. The SNAC architecture offers three potential advantages; a simpler architecture, significant savings of computational load and reduction in approximation errors. In order to demonstrate these benefits, a real-life micro-electro-mechanical-system (MEMS) problem has been solved. This demonstrates that the SNAC technique is applicable for complex engineering systems. Both AC and SNAC approaches are compared in terms of some metrics.

Published in:

American Control Conference, 2004. Proceedings of the 2004  (Volume:2 )

Date of Conference:

June 30 2004-July 2 2004

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