Research On Active Vibration Control Using Combined Fuzzy-PID Control Approach

This thesis focuses on the development of active vibration control (AVC) approaches for suppressing dangerous low-frequency resonant vibration of the wind tunnel aerodynamic model system at high angles of attack. The principles of several control schemes have been exploited to minimize low-frequency resonant responses of the simulation testing system in the form of the cantilever structure. This system is capable of offering the dynamic characteristics identical with practical one. To cancel the effect of the resonant excitation for reduced vibration responses in the AVC system, the PID control algrorithm and the fuzzy algorithm is studied respectively, and a combined fuzzy-PID control strategy is proposed based on the PID control and the fuzzy control. The described control algorithms are studied by simulation design under the software of MATLAB and experimental research to minimize the structural vibration correspondingly. The simulational and experimental results have demonstrated the effectiveness and feasibility of the presented fuzzy-PID control algorithm and it can enhance the performance of vibration control for the cantilever structure as well as protecting the actuator. These impressive results pave the way for their potential applications in the AVC system for practical wind tunnel aerodynamic models.