Study on fuzzy-PID control system for energy recovery of pipe isolation tool

Intelligent plugging technology is a very important means of pipeline maintenance. Its work efficiency and reliability are restricted by energy problems. In the absence of new high-efficiency energy, the design of a possible amount of recycling intelligent in-pipe occluder can Effectively solve this problem. In this paper a method of adding an accumulator to form a dual power source in an electro-hydraulic system was proposed, and an electro-hydraulic energy recovery control system for the intelligent occluder in the tube was designed, and the fuzzy PID control for the vibration problem was propsed that may occur during the plugging process. In another, MATLAB-Simscape software was used to simulate the process. The simulation results showed that the improved fuzzy PID control electro-hydraulic energy recovery system can make the system work under safe working conditions with an error of less than 3%. When the storage pressure was 3.8 MPa, the energy recovery efficiency was 24.57%.