Simulation analysis of hydraulic system of parachute drill based on PID parameter optimization control

ZHANG Lei
(School of Mechanical and Electrical Engineering, Henan University
of Science and Technology, Zhoukou 466000, China)

Abstract: Aiming at the problem that at the traditional drilling positioning of hydraulic parachute drill, human factors had great influence on positioning accuracy, adjustment time, level of automation and efficiency, taking YSJZ4.8 full hydraulic four arm umbrella drill as the research object, PID algorithm was used to optimize the hydraulic system of the hydraulic parachute drill. The closedloop control was adopted in the hydraulic cylinder. PID parameters were optimized based on genetic algorithm, and the system was simulated and analyzed by step signal. The dynamic simulation model of virtual prototype was established to obtain the change of piston rod displacement and hydraulic cylinder load during the change of position and orientation. The variable load was applied to the optimization system to compare and analyze the difference between the real displacement of piston rod and the theoretical value. The results indicate that the optimization system has high stability and fast response, and has high position control accuracy for variable load, which meets the requirements of umbrella drilling.

Key words: hydraulic umbrella drill; hydraulic system; piston rod displacement; ADAMS; simulation analysis