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A position follow-up control method and system based on electromagnetic switch valve

A technology of electromagnetic switch valve and control command, applied in the direction of position/direction control, non-electric variable control, control/regulation system, etc., can solve the problems of control oscillation and large control error, and achieves the solution of control oscillation, novel design and solution. The effect of control accuracy is too low

Active Publication Date: 2016-06-22
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a position follow-up control method based on an electromagnetic switch valve and a system

Method used

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  • A position follow-up control method and system based on electromagnetic switch valve
  • A position follow-up control method and system based on electromagnetic switch valve

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Experimental program
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Effect test

Embodiment 1

[0030] see figure 1 , a position follow-up control method based on the electromagnetic switch valve, when the error between the position setting value and the actual position value of the actuator is large, a control command is issued to keep the electromagnetic switch valve in a fully open state; while in the actual position of the actuator When the position is approaching the set position, it is gradually approached to the set position by controlling the on-off time of the electromagnetic switch valve within a certain period of time, which specifically includes the following steps:

[0031] Step 10: Set the position setpoint S.

[0032] Step 20: Detect the actual position value F of the actuator in real time.

[0033] Step 30: Set the switching control mode error variable E1, set the system control allowable error variable e, set the time period T1, T2, set the forward electromagnetic switch valve opening time t1 within the time period T1, and set the time period T2 Revers...

Embodiment 2

[0050] A position-following control system using the position-following control method based on an electromagnetic switch valve as claimed in claim 1, comprising the following parts:

[0051] The position setting device is used to set the position setting value S; further, the position setting device includes a position handle.

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Abstract

A position follow-up control method and system based on electromagnetic switch valves. The method comprises the steps that a position setting value S is set; the actual position value F of an actuating mechanism is detected in real time; a time cycle T1 and a time cycle T2 are set; the opening time t1 of the forward electromagnetic switch valve in T1 and the opening time t2 of the reverse electromagnetic switch valve in T2 are set; a switching control mode error variable E1 is set, a system control allowable error variable e is set, the position setting value S and the actual position value F of the actuating mechanism are received in real time, the difference value E=S-F between the position setting value S and the actual position value F of the actuating mechanism is calculated in real time, and a control instruction is sent out according to the plus or the minus of the difference value E and the magnitude of the absolute value of the difference value E; the control instruction is adopted for controlling the actuating mechanism to achieve the motion displacement. The system comprises a position setting device, a detection sensor, a controller and a control actuating device. Accurate control over positions is achieved, and the control oscillation phenomenon in the electromagnetic switch valve follow-up control technology is effectively avoided.

Description

technical field [0001] The invention relates to a position follow-up control method, more specifically to a position follow-up control method and system based on an electromagnetic switch valve, and belongs to the technical field of electro-hydraulic control. Background technique [0002] Electro-hydraulic position follow-up control is a commonly used control method in electro-hydraulic control technology. Because electromagnetic switch valves have the advantages of low price, simple structure and convenient selection and maintenance, electromagnetic switch valves are usually used to realize position follow-up control at present; That is, the control device receives the position setting command and the actual position signal of the actuator and compares the two. When there is a deviation between the two, the control device immediately sends a control command to the forward electromagnetic switch valve or the reverse electromagnetic switch valve to drive The actuator runs for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/06
CPCG05D3/206
Inventor 赵丽雄胡军李霞林池飞飞
Owner WUHAN MARINE MACHINERY PLANT
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