Abstract
It is difficult to tune parameters of fuzzy controller (FC), and control rules and membership functions of FC are hard to obtain optimization too.Therefore, the control results show strong overshoot and oscillation often.The authors propose a chaos optimal design method based on annealing strategy.According to random and ergodic features of chaos dynamics, the chaotic variables are applied to searching for parameters of FC, the optimal variables are transformed into chaotic variables by carrier-wave, the global search process is done using ergodic features of chaotic motion, and then an approximate global optimal solution is obtained. After that, the chaos local searching and optimization based on annealing strategy is cited, the parameters are optimized again within the limits of the approximate global optimal solution, which is realized by means of combination of global and partial chaos searching, which can converge quickly to global optimal value.Finally, simulations of third order and nonlinear system show that control result of the method is good.
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