Intelligent active force control with piezoelectric actuators to reduce friction induced vibration due to negative damping

In this paper, a novel approach to reduce the effect of negative damping that causes friction induced vibration (FIV) is proposed by applying an intelligent active force control (AFC)-based strategy employing piezoelectric actuators with hysteresis effect to a simplified two degree-of-freedom mathematical model of a friction induced vibration system. At first, the model is simulated and analyzed using a closed loop pure proportional-integral-derivative (PID) controller. Later, it is integrated with the intelligent AFC with fuzzy logic (FL) estimator and simulated under similar operating condition. After running several tests with different sets of operating and loading conditions, the results both in time and frequency domains show that the PID controller with the intelligent AFC is much more effective in reducing the vibration, compared to the pure PID controller alone.