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Electro-hydraulic servo valve feedback controller

An electro-hydraulic servo valve and controller technology, applied in the direction of program control, computer control, general control system, etc., can solve problems such as insufficient performance, high output pressure, excessive vibration of servo valve output pressure, etc., to improve stability and accuracy, response speed improvement, and the effect of solving the output pressure swing

Inactive Publication Date: 2016-06-01
SHAANXI ALLIANCE LOGISTICS
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  • Abstract
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Problems solved by technology

However, due to the interference of the external environment or the insufficient performance of the electro-hydraulic servo valve itself, the output pressure of the servo valve fluctuates too much, and the output pressure is too high or too low.

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  • Electro-hydraulic servo valve feedback controller

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Embodiment Construction

[0012] An electro-hydraulic servo valve feedback controller is characterized in that it includes a controller, a pressure sensor and a peripheral circuit; wherein the peripheral circuit includes an input signal acquisition circuit, a current signal output circuit and a fault switching circuit; an input signal acquisition circuit, a current signal output circuit Both the controller and the failover circuit are connected to the controller; the controller is a single-chip microcomputer based on ATmega16, and ATmega16 adopts an advanced RISC structure, and the code execution speed is high, and the work is reliable and stable.

[0013] In the feedback controller of an electro-hydraulic servo valve according to the present invention, the input signal acquisition circuit includes an I / V conversion circuit and an A / D acquisition circuit, so as to convert a 4-40mA current into a 0-5V that can be collected by a single-chip microcomputer Voltage. The current signal output circuit include...

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Abstract

The invention relates to an electro-hydraulic servo valve feedback controller and belongs to the field of automatic control. The electro-hydraulic servo valve feedback controller is characterized by comprising a controller, a pressure sensor, and a peripheral circuit, wherein the peripheral circuit includes an input signal acquiring circuit, a current signal output circuit, and a fault switching circuit which are all connected with the controller; the controller is a single-chip microcomputer based on ATmega16; and the ATmega16 uses advanced RISC structure, has high code execution speed and reliable and stable operation. The electro-hydraulic servo valve feedback controller obviously enhances the stability and the accuracy of an electro-hydraulic servo valve in application, enables the electro-hydraulic servo valve to stably and accurately output pressure, solves problems of unsteady, insufficient or over-high output pressure of the electro-hydraulic servo valve, enables the electro-hydraulic servo valve to operate reliably by means of a fault determining and fault automatic removing function, and increases response speed.

Description

technical field [0001] The invention belongs to the field of automatic control, in particular to an electro-hydraulic servo valve feedback controller. Background technique [0002] With the rapid development of the economy, my country's industry has also developed rapidly. Electrohydraulic servo valves are widely used in engineering systems. Although the hydraulic system has disadvantages such as difficult maintenance, leakage, and high noise ratio, for high-power automatic control systems, hydraulic control cannot be replaced by other control forms. With the expansion of the application field of the electro-hydraulic servo system, higher requirements are put forward for the electro-hydraulic servo valve, such as high control precision, fast dynamic response, and low cost. However, due to the interference of the external environment or the insufficient performance of the electro-hydraulic servo valve itself, the output pressure of the servo valve fluctuates too much, and t...

Claims

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Application Information

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IPC IPC(8): G05B19/042
Inventor 刘秋丽
Owner SHAANXI ALLIANCE LOGISTICS
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