Control Systems Design for Linear Dynamic Systems Using Simple Models: Some Case Studies. Part 1: The Single-Input/Single-Output Case

摘要

Controller design for an unknown plant using simple models so that the closed loop stability, asymptotic tracking of step input occurs is considered. Using first and second order differential-delay plant models, a highly satisfactory design can be achieved for most monotonic and for large numbers of non-monotonic stable plants. The predicted stability region is a substantial part of the actual stability region and frequently includes Ziegler-Nichols tuning points and standard closed-loop damping conditions. Time domain methods permit higher gains to be used than frequency domain methods. For a differential-delay model, the Smith predictor scheme is better than a standard feedback scheme.