SOLID MODELING BASED SERVO SYSTEM DESIGN FOR A HIGH SPEED MICRO GRINDING MACHINE

The flourishing hi-tech industry development has prompted the need to carry out high performance servo design and testing without actually having to construct a prototype system. However, the complicated mechanical structure and the nonlinear effects in many of the high performance systems have made it very difficult to carry out the design without a suitable model. In recent years, the software advances has achieved very accurate dynamic simulation result. It is also possible to integrate the control synthesis with the dynamic simulation. This study examines the possibility of performing the servo design within the system design environment and then applies the result to a realistic platform model. The robust sliding mode controller is employed to deal with the nonlinear characteristics in the grinding machine. The dynamic model included the multi-degree of freedom behavior and the friction effects. The simulation results also show that the sliding mode controller is able to suppress the structure resonances and achieve high accuracy control under plant uncertainties. Finally, we apply the sliding mode controller to the realistic platform to replace the traditional PDF controller, and get the satisfied achievement.