Precision peristaltic pump drive system with flow-pressure dual closed-loop PID coordinated control

Abstract

This invention discloses a precision peristaltic pump drive system with flow-pressure dual closed-loop PID collaborative control, comprising: a first feedback signal acquisition module and a second feedback signal acquisition module; a flow demand torque component generation module, used to generate a flow demand torque component based on the deviation E1 between the first feedback signal and the flow setpoint; a pressure compensation torque component generation module, used to generate a pressure compensation torque component based on the deviation E2 between the second feedback signal and the dynamic target pressure; and a coupled drive command generation module, used to calculate the dynamic coupling weight factor of the peristaltic pump based on E1 and E2, dynamically weight and fuse the flow demand torque component and the pressure compensation torque component to generate a coupled drive command for dynamic control of the drive mechanism. The system has a pressure sensor and a flow meter installed at the rear end of the pipeline, and adjusts the drive mechanism through a dual closed-loop PID algorithm to achieve real-time stable control of the output flow and pressure. This invention features convenient structural replacement, high pumping accuracy, and good operational stability, making it suitable for high-precision liquid transportation applications.

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