The Design of a New Double Fuzzy Controller

Many controlled plant has time-variable and non-linear properties in actual.It is hard to control when used normal control methods.Fuzzy controller is based on personal experiences and has good robustness.It can control linear or nonlinear system well.A new kind of double fuzzy controller is designed based on fuzzy controller to control a typical nonlinear system.The result shows double fuzzy controller can reduce steady-state error of the plant,other characteristic such as settling time,speed of response and overshoot is also prior to normal PID controller and fuzzy controller.