Robust Controller Design for Plant Uncertainty

This paper demonstrates how robust nominal model following control (RNMFC) motivated by the adaptive model following concept is developed and proposed in this paper. The control structure of RNMFC is quite different from and much simpler than those of adaptive model following control schemes. RNMFC has three main features: the use of a nominal model of the plant as a reference model, the design of a model controller which fulfills the reference tracking requirement and the inclusion of a simple PID correction mechanism which copes with all dynamic deviations of the real plant from its nominal model. With its robust control structure, RNMFC separates the reference tracking and robustness fulfillment into two independent problems. The results illustrate the robustness of RNMFC that can be manipulated parametric uncertainty of motor servo system