Tension control systems are special servo systems where the input varies according to an adjustable attenuation law. Therefore, the design must be approached from the perspective of the rolling process. It has been found that the object model parameters for tension closed-loop control vary significantly with different tension settings, sheet cross-sectional area, material, and especially rolling speed and reduction rate. This variation range can be quite large, making it difficult to maintain tension control accuracy across the entire range using a tension regulator with fixed parameters.
Increasing the rolling speed makes tension unstable and prone to strip breakage. While this problem is related to many factors, it is generally considered to be closely related to the accuracy of the tension control system. Therefore, using a tension regulator to adapt to the actual process parameters can essentially maintain constant tension accuracy. The tension control system obtains the object model through online calculations based on the process conditions, and then the tension regulator parameters are adjusted online.