Study On Inner Control Pattern Variable-Speed Pumping Souse Of Hydraulic Actuator

Hydraulic actuator is mainly used in long-distance missile for its fine dynamic performance, high precision and high power level output. The missile develops in the direction of high pressure, high maneuverability and high reliability, consequently high pressure and high power level is the trend of the hydraulic, However, this will inevitably bring the negative results such as an increase of ineffective power of the system, then the system temperature will increase urgently. Adoption of so called Intelligent Hydraulic Power System whose pressure rate output is adjusted based on real time load of hydraulic system provides a radical and effective solution to the problem. Aiming at the object, here studies are performed on equipping a variable-speed pumping source on the missile-loaded hydraulic actuator.Firstly, the working principle of variable piston pump is analyzed, its mathematical model is set up on the basis of the analysis and its system diagram is described in the Simulink, then we carry dynamic characteristics simulation through the step signal. Under the reasonable condition, we change the parameter of the components in the system, and then analyze the influence on dynamic performance of the system. Secondly, the basic elements, the operating principle and the control strategy based on DSP of the direct current motor is analyzed.The dynamic mathematic model of the hydraulic actuator equipping a variable-speed pumping source is built on the basis of the analysis of variable piston pump model and the direct current motor model. Lastly, the hardware of the DC control system based on DSP is designed. The result demonstrates that the method in this paper can solve the problem present and the DSP technique let the system become more precise and reliable and it simplify the system framework.