Vibration Attenuation System Featuring Electro-Rheological Damper with Semi-active Static Output Feedback Fuzzy Sliding Mode Control

A semi-active static output feedback fuzzy sliding mode control strategy for the vibration attenuation was developed based on the fact that for multiple stage electro-rheological(ER) damper vibration suppression system, all state variables are hard to measure real time, the upper bounds for uncertainty external disturbance and the parameters perturbation are hard to estimate a priori, and the damping force of ER damper is controlled continuously. Sliding surface gradient parameters are chosen according to the reduced order sliding mode motion Hurwitz stability criterion. Fuzzy controller is designed in terms of the sliding mode reachable condition and the maximal damping force of ER damper. The optimal vibration attenuation of main mass is guaranteed due to the control rule that damping force only dissipates the vibrating energy of main object. The simulations results indicate that the performance of the semi-active static output feedback fuzzy sliding mode control strategy is remarkable.