无刷直流电动机的滑模变结构控制算法研究

Research on Variable Structure Sliding Mode Control System of Brushless Direct Current Motor

论述了滑模变结构控制算法的基本理论,设计了无刷直流电动机的滑模变结构控制模型,并将其转化为状态方程形式,滑模线的选取,采用了等速趋近于零的比例控制,给出了滑模存在的条件。将所设计的滑模变结构控制应用于某无刷直流电动机调速系统中,进行了系统的仿真与实验,与传统的PI控制相比较,该设计提高了系统的性能。

The basic theory of variable structure sliding mode control （VSSMC） is discussed.The model of VSSMC of Brusbless DC motor is designed and verified by emulation,and directed to the form of state equation.The line of variable structure sliding mode is selected according to proportional control run to zero with fixed speed.The exsisting conditions of variable structure sliding mode are given.The design is used in a BLDCM timing system.The simulation and experiment is finished. Compare with the traditional PI control,the VSS is proved that the system performance is improved.