The Proportion Of Electro-hydraulic Radial Piston Pump Displacement Control

The radial piston pump with boot slider is a kind of new type hydraulic pump, which is developed by Germany Bosch CO. in 1980s and have lots of advantages, such as long life, low noises, high pressure, facile manipulate, high performance of oil-suction, high rotate speed, using special oil easily, multi-pump combination and so on. Electro-hydraulic proportional controlling radial piston pump, which can achieve constant pressure, constant flow and sensitive-load performance and has the advantages of both electronic technology and hydraulic technology.In 1990s, radial piston pump starts to be developed in China. My tutor ameliorated the structure of hydraulic servo controlling radial piston pump in existence. In this paper, their parameters have been calculated and directional proportional pressure reducing valve is designed which can proportionally control the discharge of radial piston pump. At last the simulation with MATLAB and analysis is made.In this paper, the means of frequency-domain analysis is adopted to linearize the system's parameters. Although there is limitation, which can't be overcome in the method and the simulation result is quiet different with the fact, but the method is very effective to analyze electro-hydraulic proportional system. At same time, using the MATLAB software, concrete noun-SIMULINK, makes computer's real time simulation. This method has lots of advantages, such as intuitionistic flow, changing parameter easy and so on.By the actuality of electro-hydraulic proportional controlling radial piston pump, some research efforts as follows are practiced:(1) In this paper, the structure and the parameters of each element of the electro-hydraulic proportional controlling radial piston pump are studied. The mathematical model is set up and simulated with MATLAB/Simulink.(2) Based advanced controlling strategy now, self-adapting fuzzy PID controller is designed. Simulated with MATLAB/Simulink, system responses tracking step signal are reproduced.Simulation results show that the dynamic characteristic of electro-hydraulic proportion controlling radial piston pump using this self-adapting fuzzy PID controller is very good.