Stable fuzzy controller for discrete event systems

In this paper, we present a new method for designing stable fuzzy controllers for discrete event systems which are modeled by max-plus algebra. The fuzzy controller has three types of inputs; such as number of elements in buffer, delay of each part types, and throughput of each machines and the output of the fuzzy system is the earliest time that the pat types are available. It is assumed that the system has uncertainty in its service times in each machine. The fuzzy controller can omit the uncertainty of the system, stabilize the closed loop system, and withheld the blocking effect. An example can illustrate the capability of the designed controller.