Study Of Semi-physical Simulation And Parameter Optimization Of Servo System Speed Loop

Permanent magnet synchronous motor and its controller are the core components of a CNC machine. The controlling and optimizing involve a lot of complicated issues such as electricity and magnetic. Research on servo system model and parameter optimization is an effective way to solve the multi-objective control of CNC machine tools. In this paper, the servo system model and parameter optimization of speed loop were studied systematically.This paper discussed the mathematical model of mechanical and electrical servo system in the semi-physical simulation environment. The semi-physical simulation model was built with the controlling of interrupt based on modeling of servo system and controlled object.The software and hardware of this semi-physical simulation platform were discussed in-depth. Based on this platform, the consistency verification of the rotate speed and quadrature axis current has been fulfilled by regression analysis and TIC(Theil’s inequality coefficient) method. The results show that the model worked well in both simulation and actual control. The simulation and experiment of rectilinear servo axis has proved that the simulation model was a common resolution.On the premise of the model consistency verification, a parameter optimization method of speed loop which based on the servo system model was put forward. First of all, the original value was calculated using the mathematical mode of speed loop. Then the parameter optimizing of speed controller was fulfilled based on the original value.