Design and analysis of robust controllers

In this paper, we address the problem of analyzing and designing robust controller given plants whose dynamic contains significant uncertainty. The proposed work comprises an H* controller design problem for a class of stable/unstable plants and selecting suitable weighting functions W₁ and W² which satisfies both robust performance and robust stability. We modify the above controller design by making use of the theory of H* parameter space method. And we compare the performance characteristics of the control system.