Research and Implementation of UHPLC Pump Dual-axis Cooperative Control

摘要

UHPLC pump has the features of high flow accuracy and low pulsation. It needs to ensure the quick response of controller command and the precise cooperation of dual-axis motors. In this paper, firstly the coordinated control curve of the dual-axis motor is determined according to the UHPLC pump flow output constraint. Secondly, the high-precision command triggering and high-speed CAN-bus data communication are used to ensure the fast and stable response of the single-axis motor. Finally, the fuzzy PID speed compensator is designed to ensure the dual-axis coordinated motion has better cooperative precision and certain anti-interference ability. The actual operation results show that the single-axis motion delay time is 1ms, and the dual-axis coordinated motion has certain anti-interference. This method provides a new idea for implementing similar coordinated motion control applications.