Hierarchical decision maker in hybrid control systems

A hybrid control system is composed of three boxes which are analogous box, digital time box and decision maker box. A hierarchical structure of decision maker in hybrid control systems is presented in this paper, which is that decision maker consists of two components, i.e., policy decision and coordination. Policy decision can design coordination and digital time box. And policy decision consists of two parts, i.e., steady policy decision and transient policy decision. In general, steady policy decision corresponds to steady requirements and transient policy decision corresponds to transient requirements in systems. A chemical concentration control system severs an illustrative example to show the features of the hierarchical decision maker.