Research on self-adaptive control method for improving positioning accuracy of asynchronous motor in automatic production line training station

The uncertainty exists in the sorting unit of YL-335 B automatic production line training and assessment equipment and in the effect on the sliding distance of three-phase asynchronous motor driving conveyor belt after braking by the frequency and time of frequency converter setting, which leads to the inaccurate stop of workpiece in pre-positioning. By collecting a large amount of gliding distance data and using polynomial curve fitting method, a mathematical model of gliding distance, running frequency and falling time is constructed, and an adaptive control method to improve the positioning accuracy of three-phase asynchronous motor is proposed. The experimental results show that the control method can self-adaptively control the stop position of the motor and locate the workpiece accurately according to the running frequency and falling time.