Symmetrical Control Method of Asymmetrical Hydraulic System Based on Output Feedback
A hydraulic system, output feedback technology, applied in the direction of fluid pressure actuating system components, fluid pressure actuating devices, mechanical equipment, etc., can solve the problems of difficult design and maintenance, complex control procedures, and difficulty in wide application, etc. Realize the effects of high-precision position tracking control, improved reliability and response characteristics, and easy control of system debugging
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[0063] Take a zero-opening valve-controlled cylinder with an inertial load as a typical example of an asymmetric hydraulic system, such as figure 2 As shown, the oil supply of the hydraulic pump controls the movement of the hydraulic cylinder through the servo valve, and the driving inertia of the hydraulic cylinder is F l The load, the mass of the load is m, x v is the displacement of the spool, because the servo valve plays a major role in the dynamic characteristics of the system, the hydraulic resistance of the valve port should be considered, in the process of continuous operation, when the oil supply pressure does not change much. In order to simplify the mathematical model of the system, the influence of the overflow valve on the dynamic characteristics of the system can be ignored, so the oil source can be regarded as a constant pressure source P S . The pressure in the left chamber of the valve-controlled cylinder is P 1 , the pressure in the right chamber of the ...
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