Quantitative control of inverse response processes

The Smith predictor, known as a dead time compensator, is extended to the control of a class of nonminimum phase processes called inverse response processes. An analytical design procedure is developed based on modern H_∞ control theory. The resulting controller can provide not only the suboptimal frequency domain performance, but also the quantitative time domain specifications for step response. The performance and robustness of the closed loop system are discussed. For illustration, an example is also given to compare the proposed controller previous ones