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Electro-hydraulic proportional control system based on digital controller

A digital controller and control system technology, applied in fluid pressure actuating devices, servo motor components, mechanical equipment, etc., can solve problems such as high cost, limited application of servo valves, inability to accurately control the loading rate and force value accuracy, etc. Achieving the effect of stable process and satisfying loading requirements

Inactive Publication Date: 2017-06-20
李晓波
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Problems solved by technology

If an ordinary pressure adjustment system is used, the loading rate and force value accuracy cannot be accurately controlled, and cannot meet the technical requirements of the national standard test method; the servo valve has high control accuracy and can meet the control accuracy requirements of the hydraulic loading system, but its system is complicated. High cost, poor anti-fouling ability, and difficult maintenance greatly limit the application of servo valves

Method used

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  • Electro-hydraulic proportional control system based on digital controller
  • Electro-hydraulic proportional control system based on digital controller

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with drawings and embodiments.

[0012] Such as figure 1 , the electro-hydraulic proportional loading control system based on a digital controller is mainly composed of a control system and a hydraulic loading system. The control system includes a single-chip microcomputer system, a proportional amplifier, and a pressure sensor, which mainly realizes the control of the loading process of the loading system. The hydraulic loading system includes a hydraulic source, an electro-hydraulic proportional valve, and a hydraulic cylinder. It mainly executes the commands of the control system to complete the loading of the specimen.

[0013] According to the technical requirements of the testing machine for test loading, a digital controller with constant loading speed and automatic adjustment is designed. It has the function of pressure tracking and follow-up. According to the feedback signal of the pressure ...

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Abstract

An electro-hydraulic proportional control system based on a digital controller is mainly composed of a control system and a hydraulic loading system. The system adopts force value closed-loop real-time control, which improves the control of loading rate and force value accuracy during the loading process of the testing machine, and has high dynamic performance and automatic adjustment. The electro-hydraulic proportional loading system based on the digital controller can better meet the loading requirements of the testing machine, the loading process is stable and there is no overshoot, and the force value control accuracy can be within the allowable range.

Description

technical field [0001] The invention relates to an electro-hydraulic proportional control system based on a digital controller, which is suitable for the mechanical field. Background technique [0002] The mechanical strength characteristic test of the material is done on the material testing machine. When the loading force is large, the loading of the material testing machine generally adopts hydraulic loading. According to the national standard, the test should be carried out under the condition of constant boost rate to ensure the test accuracy. If an ordinary pressure adjustment system is used, the loading rate and force value accuracy cannot be accurately controlled, and cannot meet the technical requirements of the national standard test method; the servo valve has high control accuracy and can meet the control accuracy requirements of the hydraulic loading system, but its system is complicated. High cost, poor anti-fouling ability, and difficult maintenance greatly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 李晓波
Owner 李晓波
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