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Constant tension control system based on fuzzy PID (Proportion Integration Differentiation)

A control system and constant tension technology, applied in the field of machinery, can solve the problem that the system cannot obtain the control effect, and achieve the effect of improving the control effect, good adaptability and fast dynamic response speed.

Inactive Publication Date: 2018-03-09
李福霞
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The traditional PID controller has a simple structure and strong robustness, but there is a contradiction between tracking the set value and the ability to suppress disturbances, so that the system cannot obtain the best control effect

Method used

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  • Constant tension control system based on fuzzy PID (Proportion Integration Differentiation)
  • Constant tension control system based on fuzzy PID (Proportion Integration Differentiation)

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with drawings and embodiments.

[0013] Such as figure 1 , The control system is mainly composed of a variable pump, a flow control valve, a proportional flow control valve, a hydraulic motor, a tensiometer, and a programmable controller. To keep the tension constant, the ratio of the pressure difference between the oil inlet and outlet of the hydraulic motor to the radius of the reel should be kept constant, and the oil return pressure of the hydraulic motor is equal to zero, so the strip can be accurately controlled only by controlling the oil inlet pressure of the motor. The magnitude of the tension, so that the control tension F is always maintained at a constant value. The tension of the rolled strip is checked by a tension sensor to detect the tension of the strip. And the feedback signal of the tension sensor is sent to the PLC, so that the control system constitutes a closed-loop control sys...

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Abstract

The invention relates to a constant tension control system based on fuzzy PID (Proportion Integration Differentiation), which is mainly formed by a variable pump, an overflow valve, a proportion overflow valve, a hydraulic motor, a tensiometer and a programmable logic controller. The control system adopts a fuzzy PID control algorithm to control the system, so that a PID control parameter is self-tuned online; and compared with a conventional PID control system, the fuzzy PID control system is fast to react, high in adjusting ability, good in robustness, and beneficial to effectively improvinga control effect.

Description

Technical field [0001] The invention relates to a constant tension control system based on fuzzy PID, which is suitable for the mechanical field. Background technique [0002] In the production process of strip pressing and crimping, the processed strip or wire is always placed on the machine in rolls, and then the strip is carried to the processing place for continuous processing. In the process of processing, the warp of the raw material is continuously reduced, resulting in the reduction of the traction torque, and the spring pressure needs to be adjusted continuously, and the tension fluctuates greatly, which has a great impact on the processing quality and precision. In order to ensure that the tension of the strip is maintained at a given value, its tension must be detected during the production process. In order to improve the quality and quality of products, it is very important to choose a suitable control system. The traditional PID controller has a simple struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H23/182
CPCB65H23/182B65H2515/31B65H2557/2644B65H2220/01
Inventor 李福霞
Owner 李福霞
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