TWICE OPTIMUM CONTROL FOR A KIND OF FIRST ORDER SYSTEMS WITH DEAD-TIME

In this paper, we'll discuss twice optimum control (TOC) for G_a(p)=K/1+Tp^e-LP and G_b(p)=K/p^e-LP, and give an experience formula for decreasing amount of work looking for the optimum parameters of TOC bv CAD. Because,TOC have both advantage for Smith compensating control and state feed back control,it has not only good performance, but also strong robustness. Although,G_a(p)is different from G_b(p), but they have got same performance almost:σ₁%=1;σ₂%≤2%;σ₃%≤3.3%;σ₄≤5.5%.Finally,anexample is given, and the result shows the TOC is an effective design method for the engineering.