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High-frequency response servo proportional valve position control method

A servo proportional valve and control method technology, applied in servo motor components, fluid pressure actuating devices, mechanical equipment, etc., can solve the problem that PID parameters cannot adapt to high-frequency and low-frequency given signals at the same time, to ensure rapidity, Flexible control and the effect of adapting to complex working conditions

Active Publication Date: 2021-02-05
NANJING INST OF TECH
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Problems solved by technology

This control method has the advantages of rapidity and stability, and can synchronously follow the spool displacement when the given signal is low frequency and high frequency, which solves the problem that a set of PID parameters cannot adapt to high frequency and low frequency given signals at the same time

Method used

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  • High-frequency response servo proportional valve position control method
  • High-frequency response servo proportional valve position control method
  • High-frequency response servo proportional valve position control method

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Embodiment Construction

[0028] The present invention is described in further detail now in conjunction with accompanying drawing.

[0029] as attached Figure 1-3 As shown, the present invention proposes a high-response servo proportional valve position control method. In one embodiment of the present invention, its implementation is based on a single electromagnet driven direct-acting electro-hydraulic proportional valve with spool displacement feedback. . The direct-acting high-response proportional valve consists of a valve body, a position controller and a host computer. The valve body includes a single proportional electromagnet, a valve core and a valve sleeve. The proportional electromagnet receives the current output by the position controller to generate a thrust on the spool, and the electromagnetic thrust, spring force, hydraulic force and friction force work together on the spool to control the position of the spool. The position of the spool is detected by the displacement sensor, and...

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Abstract

The invention discloses a high-frequency response servo proportional valve position control method. The method is based on a proportional valve position control system, when a low-frequency signal isgiven, a displacement given signal is compared with a valve element displacement feedback signal to obtain position deviation, the position deviation is divided into three sections according to the position deviation range, and position PID controller parameter setting is carried out on each section of position deviation; at the moment, the input current of a proportional electromagnet is determined by the output value of a displacement following part; and when a high-frequency signal is given, the displacement following part does not work, and at the moment, the input current of the proportional electromagnet is determined by the output values of a speed following part, a feedforward part and a differential leading part. The method has the advantages of rapidity and stability, the displacement of a valve core can be synchronously followed when the given signals are low-frequency and high-frequency, and the problem that one set of PID parameters cannot adapt to the high-frequency and low-frequency given signals at the same time is solved.

Description

technical field [0001] The invention belongs to the technical field of electro-hydraulic control, and in particular relates to a position control method of a high-response servo proportional valve. Background technique [0002] The electro-hydraulic proportional valve is the core and main power amplification component of electro-hydraulic proportional control technology, representing the development direction of fluid control technology. With the continuous development of engineering technology, higher requirements are put forward for the position control accuracy and frequency response of proportional valves. Therefore, it is urgent to develop a high-precision, high-response proportional valve position control method. At present, there are a series of researches on the position control of high-response servo proportional valves at home and abroad. [0003] In an existing control method, by obtaining the positioning error of the system, it is judged whether it has reached ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/044F15B13/16
CPCF15B13/044F15B13/16F15B2013/0409
Inventor 陈立娟彭泽钦高伟艾超俞奇张苏南
Owner NANJING INST OF TECH
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