Stability of the Cone Probe Driven by Hydraulic Motor Based on Fuzzy PID

Abstract

In the test of mechanical properties of deep-sea sediments, hydraulic cylinders are often used to drive the probe into the sediment. However, due to the limitation of the stroke of the hydraulic cylinder, there is a limit to the depth of penetration of the probe. In order to solve the problem of limited travel, a penetration device that relies on hydraulic motor to drive the probe is designed. Through the co-simulation of AMESim and Simulink, the valve-controlled hydraulic motor system is analysed under the control of conventional PID control strategy and fuzzy PID control strategy. Simulation results: In terms of step response, the fuzzy PID control is 7.12% faster than the traditional PID control, and the overshoot is reduced by 44.4%. Under the step interference signal, the fuzzy PID control has an anti-interference ability improved by 60.7%compared with the traditional PID control. In terms of energy consumption, fuzzy PID control saves 1.08% energy compared to traditional PID control.