Research On Control Algorithm Of High-performance Servo System Based On DSP56F805

An emulation software of a fully digital PMSM servo system with DSP as its kernel controller is studied in this paper. To improve the performance of the system, an observer using Kalman filter is also proposed.The paper first introduces the research work that has been done home and abroad on the servo system. Fully digital system has always been the goal to pursue in the field of servo system and provided fundamental impetus to the research work done in this paper.To achieve a good performance both statically and dynamically, closed loop control method has to be applied. Using permanent magnet synchronous motor as the controlled object, this paper establishes two-closed-loop model of the PMSM servo system by computer simulation based on the selection of the control theory and the control method.Being the most state-of-the-art single-chip microprocessor, DSP exhibits a superior functionality, high processing speed and reliable performance, and therefore has a wide application prospect in the field of servo system. This paper illustrates the emulation software architecture of the system based on DSP56F805. The design and implementation of the speed and current feedback loop are described in detail.Some information of the position is lost during the data sampling due to the optical encoder. As the result, the smooth of the rotation is degraded, so it is necessary to deal with the data. This paper uses Kalman filter to process the signal. At the same time, the recursive extended least squares (RELS) parameter identification method identifies the variations of mechanical parameters, and the estimated parameters are used to modify the gain of the speed controller.Computer simulation and experimental results are presented, from which the algorithm is proved to be feasible. Moreover, the study of the paper has a certain role on promoting the performance of the servo drivers.