Optimal Control of Technological Processes

The paper formulates conditions under which the roots closest to imaginary axis (critical roots) of characteristic equation a linearized system are real for maximum possible degree stability closed-loop control technological process with pure delay. For parameters controllers corresponding stability, these multiples. Their multiplicity order is one more than number coefficients in transfer function controller. It demonstrated that typical object, satisfied all “serial” laws. This allowed obtaining analytical expressions optimal settings and limiting degrees as functions object dynamic characteristics processes. considers problem robust systems an containing has been proven problem, operations maximizing over controller minimizing set can be interchanged. Therefore, selecting amounts determining minimum parameter values. Controllers such suitable, without modification, whole class