Abstract:

A new indirect T-S (Takagi-Sugeno) adaptive fuzzy control based on niche of ecosystems is presented． Regarding the approach degree function of niche with unknown parameters as the consequent of fuzzy rules, the zero-order T-S fuzzy control based on niche is constructed. The controller is designed by using the method of Lyapunov’s synthesis and the consequent parameters are determined by using a gradient descent method. Finally, the adaptive law of consequent parameters is gotten. The fuzzy system based on niche embodies biological individual’s self-adaptivity, namely the individual is evolving in a direction that favors its development. So the proposed fuzzy T-S fuzzy system has better adaptivity, such as obtaining a smaller fluctuant tracking error, and the global stability of the closed-loop system can be assured. Simulation of two-dimensional predator system tracking is carried out to verify the design approach．