Hydraulic cylinder frictional compensation control method study

Abstract

The invention relates to a hydraulic cylinder frictional compensation device and a control method, and belongs to the field of hydraulic control systems. The device comprises a motor, a pump, a filter, an electro-hydraulic servo valve, an amplifier, a controller, a position instruction device, a displacement sensor, a hydraulic cylinder, a load, an overflow valve and the like; a motor control pumpsupplies oil to the electro-hydraulic servo valve through the filter, one end of the filter passes through an overflow valve oil returning box, the other end of the filter supplies oil to the hydraulic cylinder through an oil inlet of the electro-hydraulic servo valve, a hydraulic cylinder piston rod is pushed to move, the position instruction device receives an instruction, signal current is input to the electro-hydraulic servo valve through the controller and the amplifier, the load aim is achieved, displacement of the piston rod is converted into current through the displacement sensor tobe compared with an input signal, and a hydraulic feedback system is formed. Through the control process, the system tracking precision is improved, and the higher system dynamic and static response performance can be achieved.

Description

Technical field [0001] The invention relates to a hydraulic cylinder friction compensation device, which belongs to the field of pressure control systems. Background technique [0002] The electro-hydraulic servo system is used in aerospace, artillery, aircraft control systems and other devices due to its good servo performance, high control precision and fast speed, and has become an important aspect of the automatic production line. Many researchers have done a lot of research on the accuracy of hydraulic control, mainly focusing on the hardware control of the external system. There is very little research on the controller. Hardware friction compensation has especially unavoidable defects, such as flow control and loss of hydraulic oil, Oil spill etc. In the soft control of the controller, although there are certain defects, its control performance is good. Compared with hardware control, it has strong dynamic and static response performance, and has become the main meth...

AI Technical Summary

Problems solved by technology

Many researchers have done a lot of research on the accuracy of hydraulic control, mainly focusing on the hardware control of the external system. There is very little research on the controller. Hardware friction compensation has especially unavoidable defects, such as flow control and loss of hydraulic oil, oil spill etc.

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