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Controlling device of flash butt welding position servo system

A servo system, flash butt welding technology, applied in the direction of digital control, electrical program control, etc., can solve the problem of low tracking accuracy

Inactive Publication Date: 2009-12-02
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a flash butt welding position servo system control device, apply a quadratic optimal control linear feedback to its hydraulic position servo system control loop, and calculate the pre-filter function and disturbance feed-forward compensator function, which overcomes the shortcomings of low tracking accuracy of the traditional PID control method

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  • Controlling device of flash butt welding position servo system
  • Controlling device of flash butt welding position servo system
  • Controlling device of flash butt welding position servo system

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Embodiment Construction

[0034] figure 1 The illustrated embodiment shows that the hardware part of the flash butt welding position servo system control device of the present invention includes an industrial control computer (1), a 16-channel programmable gain control single-ended A / D sampling board (2), and an 8-channel optically isolated D / A conversion board (3), photoelectric isolation module bottom board (4), D / A conversion board terminal board (5), man-machine interface (6), printer (7), DC24V power supply (8), hydraulic cylinder displacement input wiring Terminal board (9), hydraulic cylinder displacement speed input terminal board (10), hydraulic cylinder displacement acceleration input terminal board (11), electro-hydraulic servo valve current input terminal board (12), hydraulic cylinder pressure input terminal board (13), Electro-hydraulic servo valve output terminal board (14), servo amplifier (15), electro-hydraulic servo valve (16), hydraulic cylinder (17), load (18), servo amplifier curre...

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Abstract

The invention discloses a controlling device of a flash butt welding position servo system and relates to a program controlling system. The device consists of a hardware part and a program control part, wherein the program control part is that: the linear feedback of quadratic optimal control is applied to a control loop of a hydraulic position servo system of the controlling device of the flash butt welding position servo system and a prefilter function and a disturbance feedforward compensator function are calculated on the basis of the linear feedback. The quadratic optimal controlling method with disturbance feedforward is applied to the hydraulic position servo system of a flash butt welding process, so that the hydraulic position servo system has rapider response speed, shorter regulating time, higher tracking precision and stronger antijamming capacity than a conventional PID controlling method; the problem of low tracking precision of the prior PID controlling method is solved; the error of real-time dynamic position tracking precision is increased to 2.2 percent from 13.3 percent of the PID controlling method; and the requirement of the tracking precision of the hydraulic position servo system is met.

Description

Technical field [0001] The technical scheme of the present invention relates to a program control system, specifically a flash butt welding position servo system control device. Background technique [0002] The flash butt welding process of large cross-section thin plates and billets is divided into five stages: preheating, flashing, upsetting, holding and recovery. The steel to be welded can be divided into low carbon steel, low alloy steel, high carbon steel, high alloy steel and austenitic steel. [0003] In order to improve the welding quality of flash butt welding, many studies have been carried out in the prior art. CN00101672.5 discloses the "flash butt welding method", which is an improvement of the traditional welding device from the perspective of hardware. It improves the flash welding by strengthening the heating of the welded workpiece, reducing the flash reserve and stabilizing the welding quality Efficiency; CN200610038107.0 discloses the "method and device for fu...

Claims

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Application Information

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IPC IPC(8): G05B19/18G05B19/414G05B19/19
CPCY02P70/10
Inventor 王宏文祖丽楠刘冉柳溪
Owner HEBEI UNIV OF TECH
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