In response to the problems of high cost

insufficient driving force of existing driving equipment for plant-like growth soft robots

and failure to collect tiny flow signals due to excessive range of flow sensors

a design of a scheme hydraulic drive system based on a syringe pump is proposed.The system takes a microcontroller unit as the control core and uses a fuzzy PID algorithm to control the pressure and flow signals in closed loop.The rotational speed of the stepper motor is measured by the encoder and indirectly reflects the flow rate

effectively avoiding the range limitation problem of traditional flow meters under micro-flow conditions.The dynamic response

control accuracy and stability of pressure and flow control are tested.The experimental results show that the system’s pressure control accuracy reaches 0.04kPa

and the flow control error is controlled within approximately 5%.In response to the problem of braking slip caused by liquid inertia in the soft hose

a braking strategy is proposed.This strategy generates reverse hydraulic pressure to offset the inertial impulse of the liquid through instantaneous negative pressure

thereby achieving rapid braking and precise positioning of the mechanism.