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We develop a unified approach for the optimization of closed-loop control systems, based on our earlier results on Euler-Langrange equation in Naidu, D. S. and Imura, Y. (2004) and open-loop optimal control in Imura, Y. and Naidu, D. S., (2006). The unified approach results are simultaneously applicable to both shift (q)-operator-based, discrete-time systems and the derivative (d/dt)-operator-based, continuous-time systems. It is shown that the optimal condition results that are now obtained separately for continuous-time and discrete-time systems can be easily obtained from the unified approach. An illustrative example is provided to demonstrate the results developed in this paper.
Date of Conference: May 30 2007-June 1 2007