An elevator group supervisory controller is a control system that manages systematically two or more elevators in order to serve passengers as required. The elevator cars are assigned accordingly in response to hall calls, so as to optimize waiting time, riding time, power consumption, passengers’ comfort, etc. In this paper, the simplicity of ordinal structure fuzzy logic in making crucial sup...

We present a hierarchical control theory for supervisory automata based on state aggregation. Conditions are determined on state partitions which ensure that the control of transitions between blocks in a high level (i.e. aggregated) model, combined with local state-dependent controls, is eeective in the sense of achieving speciications given either for the high level model or for the low level...

A hierarchical control strategy consisting on a supervisory switching of PID controllers, simpli ed using the c-Means clustering technique, is developed and applied to the distributed collector eld of a solar power plant. The main characteristic of this solar plant is that the primary energy source, the solar radiation, can not be manipulated. It varies throughout the day, causing changes in pl...