| Pump-controlled motor, due to its peculiarities of high-efficiency, low heat, long lifespan, small moment of inertia and quick response, is applicable for the field of high speed and huge power. By the scientific development, Electro-hydraulic proportional technique, as the joint of computer and electro-hydraulic proportional pump-controlled motor velocity system, has been widely used in the industry. For raising the working capacity of pump-controlled motor, the author investigates the system structure and the Control Strategy from the perspective of Control theory in the present thesis.The author firstly introduces the situation and advantage of Electro-hydraulic proportional technique and summarizes the application of electro-hydraulic proportional pump-controlled motor velocity system. Later, the author analyzes the Regulate-speed Principle and the Physical laws of the electro-hydraulic proportional pump-controlled motor velocity system, and also builds up mathematical model. Through setting up hydraulic experimental stand, by the means of Curve approximation based on least-square, the author tests characteristic of frequency response and the System identification of the Electro-hydraulic proportional Pump-Motor System. Combined with the application of the Electro-hydraulic proportional Pump-Motor System, the author, with regard to the linear time-invariant continuous system, puts forward the PID Control Strategy based on the LQR. As for the linear time-varying system, the author proposes the Control Strategy of self-tuning minimal variance adaptive control. According to the system mathematical model, through the systematical Simulation model in Matlab and Simulink, the author simulates the PID Control Strategy and self-tuning minimal variance adaptive control. The simulation process suggests the dynamic characteristics is improved to the greatest extent, which aims at the standard of Control purpose and proves the rationality and feasibility of the Control Strategy.
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