Adaptive Fuzzy Pid-based Radial Piston Pump With Electro-hydraulic Servo 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 servo 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, is utilized widely in engineering machinery, mine machinery, rolling mill, injection shape machinery, and so on.In 1990s, radial piston pump starts to be developed in China, which performance is reached international level. In this paper, electro-hydraulic servo controlling radial piston pump with electro-hydraulic servo valve tracking step signal and some other signals is designed, and simulated with MATLAB/Simulink.By the actuality of electro-hydraulic servo controlling radial piston pump, some research efforts as follows are practised:(1) In an electro-hydraulic servo system, the electro-hydraulic servo valve is both the electro-hydraulic transition element and the power magnifier, which plays an important part. In this paper, the structure and the parameters of each element of the electro-hydraulic servo valve 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, square wave signal, sine signal, triangle signal and saw tooth signal are reproduced.Simulation results show that the dynamic characteristic of electro-hydraulic servo controlling radial piston pump using this self-adapting fuzzy PID controller is very good.