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Deviation-balancing-based lifting synchronization control method and apparatus of tundish car

A tundish truck and synchronous control technology, which is applied to fluid pressure actuators, servo motors, servo meter circuits, etc., can solve the problems of low control accuracy, unfavorable stability and dynamic performance of tundish trucks, and high equipment maintenance costs

Active Publication Date: 2015-08-12
中冶赛迪电气技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above that in the continuous casting tundish car platform lifting system, there are still problems such as high equipment maintenance cost, low control accuracy, and slow system response speed, which have a negative impact on the stability and dynamic performance of the tundish car

Method used

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  • Deviation-balancing-based lifting synchronization control method and apparatus of tundish car
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  • Deviation-balancing-based lifting synchronization control method and apparatus of tundish car

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Embodiment 1

[0060] figure 1 It is a schematic flow chart of the method of the present invention, as shown in the figure, the method of the present invention specifically includes:

[0061] Step 1) Determine the dead zone of the proportional valve corresponding to the four oil cylinders, calculate the dead zone compensation amount of the proportional valve and output it.

[0062] figure 2 It is a structural diagram of the method control system of the present invention, image 3 It is a schematic diagram of the internal algorithm of the method control system of the present invention. This step is used to eliminate the dead zone of the proportional valve, so that the final control value can cross this range, and try to keep the linear relationship between the flow rate of the proportional valve and the moving speed of the piston rod of the oil cylinder.

[0063] When the tundish truck platform rises, assign the initial value 0 to the dead zone compensation amount CV1(1) at the first mome...

Embodiment 2

[0086] Figure 4It is a hardware structure diagram of the device described in the present invention, which only shows a hardware structure diagram of a dedicated controller for a hydraulic cylinder, and the hardware structure of the remaining three hydraulic cylinder controllers is the same as that of the hydraulic cylinder, and only shows the same as that of this hydraulic cylinder for convenience of description. For the parts related to the embodiment of the invention, this embodiment provides a synchronous control device for lifting and lowering tundish trucks based on deviation balance. The device is a dedicated controller and includes the following units:

[0087] The dead zone compensation unit is used to judge the dead zone of the proportional valve corresponding to the four oil cylinders, and calculate the dead zone compensation amount of the proportional valve;

[0088] The single-cylinder deviation control unit calculates the single-cylinder closed-loop control amoun...

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Abstract

The invention, which belongs to the technical field of the continuous casting process, relates to a deviation-balancing-based lifting synchronization control method and apparatus of a tundish car. The method comprises the following steps: (1), determining proportional valve dead zones corresponding to four oil cylinders, and calculating dead zone compensation dosages of proportional valves and carrying out outputting; (2), according to deviation of a position setting value and an actual position value, calculating a single cylinder closed-loop controlling quantity and carrying out outputting; (3), on the basis of deviation of a synchronization target value and an actual position, calculating a synchronization closed-loop controlling quantity and carrying out outputting; and (4), calculating a final controlling quantity and outputting the quantity information to the four proportional valves. According to the invention, dead zone compensation is carried out automatically based on the actual parameter change and response speeds of controlled oil cylinders corresponding to the proportional valves are improved. A single-cylinder deviation controller and a synchronous deviation balancer are used for limiting a single-cylinder error and a synchronous error; and thus the control precision is improved and rapid and stable operation of the lifting platform of the tundish car can be guaranteed. Problems of large synchronization deviation of the lifting system of the tundish car, unstable operation, slow hydraulic component speed, and high maintenance cost and the like can be solved.

Description

technical field [0001] The invention belongs to the technical field of continuous casting technology in the metallurgical industry, and relates to a method and device for synchronous control of lifting and lowering of a tundish car based on deviation balance. Background technique [0002] In the continuous casting process, the tundish car is the key equipment to ensure the continuous production of the continuous casting process, mainly used to support and transport the continuous casting tundish. In continuous production, in order to quickly and accurately control the depth of the nozzle inserted into the crystallizer, the lifting platform of the tundish truck is required to be able to move up and down smoothly and synchronously under heavy load, and can stop at any position to keep the tundish level during casting. [0003] In the prior art, the continuous casting tundish car lifting platform has two modes of electric worm gear drive and hydraulic drive. The former is comp...

Claims

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Application Information

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IPC IPC(8): F15B21/02F15B11/22
CPCB22D11/18F15B11/22F15B21/001F15B2211/71F15B2211/78
Inventor 岳洪亮徐祉娟何茂松
Owner 中冶赛迪电气技术有限公司
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