A Novel Adjustable Parameters PID Control of Dual-motor Driving Servo System

In order to reduce the adverse effect of backlash nonlinearity on dual-motor driving servo system, the system model is firstly described. Then a novel adjustable parameters PID control algorithm combining fuzzy RBF neural network control with PID control is proposed for the first time, and analyzed its stability. In the simulation analysis, the system track step signal, ramp signal and sine signal respectively. Simultaneously, different interference signal were applied to system output when system tracking different signal. Simulation results show that the proposed control algorithm has smaller tracking error and better anti-interference ability than that of mere PID control, because PID parameters can automatically be adjusted as the system tracking error changes. In the end, white noise interference signal are applied to system output in the experiment analysis. The experiment results also validate the higher tracking accuracy and stronger robustness of the proposed control algorithm than that of PID control.