The Design of Nonlinear Servo System using Fuzzy Method

This paper presents the design of nonlinear servo system using fuzzy method. The idea behind this control method is to divide the operating region of nonlinear system into collection of local linear servo control system and apply fuzzy method for calculation the control input. The control input of each local linear servo system is calculated using Davison-Smith method and Hikita pole assignment method. We can prove that the all of states of the fuzzy servo system are bounded and output errors converge to zero using Lyapunov method. The simulations are done to nonlinear mass-spring-damper system to illustrate the effectiveness of the proposed method