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A Position Control Method of High Response Servo Proportional Valve

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 stability, The effect of adapting to complex working conditions and flexible control

Active Publication Date: 2022-05-27
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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  • A Position Control Method of High Response Servo Proportional Valve
  • A Position Control Method of High Response Servo Proportional Valve
  • A Position Control Method of High Response Servo Proportional Valve

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Embodiment Construction

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] as attached Figure 1-3 As shown in the figure, a high-response servo proportional valve position control method proposed by the present invention, in one embodiment of the present invention, realizes a direct-acting electro-hydraulic proportional valve driven by a single electromagnet with valve core displacement feedback . The direct-acting high-response proportional valve consists of a valve body, a position controller and an upper computer. The valve body includes a single proportional solenoid, valve core, and valve sleeve. The proportional electromagnet receives the current output by the position controller to generate a thrust to the valve core. The electromagnetic thrust, spring force, hydraulic force and friction force work together with the valve core to control the valve core position. The position of the valve core is detected by the displac...

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Abstract

The invention discloses a high-response servo proportional valve position control method. Based on the proportional valve position control system, when a low-frequency signal is given, the position deviation is obtained by comparing the given displacement signal with the valve core displacement feedback signal. The position deviation range is divided into three sections, and the position PID controller parameters are adjusted for each position deviation respectively; at this time, the input current of the proportional electromagnet is determined by the output value of the displacement following part; when the given high frequency signal is given, the displacement following Part of it does not work. At this time, the input current of the proportional electromagnet is determined by the output values ​​of the speed following part, the feedforward part and the differential leading part. The invention has the advantages of rapidity and stability, can synchronously follow the valve core displacement when the given signal is low frequency and high frequency, and solves the problem that a set of PID parameters cannot adapt to high frequency and low frequency given signals at the same time.

Description

technical field [0001] The invention belongs to the technical field of electro-hydraulic control, and in particular relates to a position control method for a high-frequency response servo proportional valve. Background technique [0002] Electro-hydraulic proportional valve is the core and main power amplification element of electro-hydraulic proportional control technology, which represents 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-frequency response servo proportional valve at home and abroad. [0003] In an existing control method, by acquiring the positioning error of the system, it is judged wheth...

Claims

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Application Information

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Patent Type & Authority Patents(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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