High-precision tension control system and control method

Abstract

The invention relates to the tension control field, particularly to a high-precision tension control system and control method. The system is composed of an upper computer control system, a tension control servo driver, a spindle servo driver, a spindle motor, a tension sensor and a reeling/unreeling motor. The tension control servo driver consists of a rolling diameter filtering module, a layer thickness compensation module, a rolling diameter PI adjustment module and a rolling diameter evaluation module; and the rolling diameter filtering module, the layer thickness compensation module, and the rolling diameter PI adjustment module output a rolling diameter filter signal, a layer thickness compensation signal, and a rolling diameter value needing to be increased to the rolling diameter evaluation module to carry out rolling diameter evaluation, thereby obtaining an electronic gear ratio. According to the invention, the rolling diameter evaluation function is added and is used for calculating a rolling diameter of a material precisely. Meanwhile, the control capability of the tension adjusting device is weakened; the tension fluctuating range is reduced substantially; and the tension control stability is improved.

Description

technical field [0001] The invention relates to the technical field of tension control, in particular to a high-precision tension control system and a control method. Background technique [0002] The current tension control technology is divided into three categories. The first category is the tension control technology composed of magnetic powder clutch and tension controller. The disadvantages of this technology are that the price is high, the system life is short, the function is relatively single, and there is basically no expandability. The advantage is that the control method is mature and easy to maintain; the second type is the tension control technology composed of frequency converter and asynchronous motor. The disadvantage of this technology is that the response speed of the asynchronous motor is slow. Large, the advantages are convenient maintenance and simple debugging; the third type is a tension control system composed of a servo driver and a servo motor. The...

AI Technical Summary

Problems solved by technology

[0002] The current tension control technology is divided into three categories. The first category is the tension control technology composed of magnetic powder clutch and tension controller. The disadvantages of this technology are that the price is high, the system life is short, the function is relatively single, and there is basically no expandability. The advantage is that the control method is mature and easy to maintain; the second type is the tension control technology composed of frequency converter and asynchronous motor. The disadvantage of this technology is that the response speed of the asynchronous motor is slow. Large, the advantages are convenient maintenance and simple debugging; the third type is a tension control system composed of a servo driver and a servo motor. The disadvantage of this technology is that the tension fluctuates greatly and even tension divergence occurs when the roll diameter estimation is inaccurate. In the situation, the advantage is that the tension response speed is fast, the robustness is strong, and there is a large optimization space

At present, there are also tension control servo system products on the market. The technical defect of them is that when the roll diameter is uncertain, the tension fluctuates greatly, and even the tension diverges.

In addition, when the tension is set at a low level or the spindle has a large acceleration and deceleration, large tension fluctuations are also prone to occur.

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