Application of Backstepping nonlinear PID Compound Control to Servo System

Considering wide variations in loads and moment of inertia of machine tool position servo system,backstepping nonlinear PID compound control is presented.The online parameter adjustments of the proportion,integral and differential of the conventional PID controller were realized by the nonlinear PID,achieving the adjustment control of the system.The backstepping algorithm guarantees convergence quickly as highly error and improves the tracking ability.Simulation results show that the compound control strategy has better stabilization and dynamical tracking accuracy.