Tension control method

Abstract

The invention discloses a tension control method which comprises the steps: 1, unreeling a tape coil by an unreeling roll, and winding the unreeled tape coil onto a reeling roll through a tension roll; 2, acquiring the original roll diameters of the unreeling roll and the reeling roll; 3, acquiring time-varying real-time roll diameter(s) of the unreeling roll and / or the reeling roll in a tape coil winding process; 4, integrating input information in the steps 2 and 3, carrying out an interpolation operation on the input information, respectively working out rotation positions of motors of the unreeling roll and the reeling roll once the tape coil is wound by a distance L, and respectively outputting the rotation positions to the motor of the unreeling roll and the motor of the reeling roll through an information output unit; and 5, running the motor of the unreeling roll and the motor of the reeling roll according to the position information output in the step 4, wherein the interpolation operation in the step 4 is that an interpolator carries out calculation on pulses required by the rotation of the motors or a bus controller carries out the calculation on the positions of the rotation periods of the motors. The tension control method disclosed by the invention is simple in control manner, easy to realize, high in control precision and good in system operation stability.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a tension control method. Background technique [0002] Tension control is widely used in the actual production of all walks of life, generally used in the existing technology: [0003] 1. DC control (DC speed regulation, DC braking), which is characterized by adjusting the tension output by adjusting the braking amount of the unwinding motor. The disadvantage is that the synchronization performance of DC mechanical transmission is not ideal, and it is impossible to achieve constant line speed and constant tension, especially for large packages. [0004] 2. Hydraulic control (hydraulic station, flow proportional valve), which is characterized by adjusting the tension output by adjusting the flow proportional valve of the unwinding motor. Existing problems First, the sealing performance and reliability of domestic hydraulic parts are poor. Second, although the quality of import...

AI Technical Summary

Problems solved by technology

Existing problems 1. Poor sealing performance and reliability of domestic hydraulic parts

Second, although the quality of imported products is reliable, the price is high and spare parts are difficult

[0005] 3. The frequency conversion control has high precision, but it is a speed control, and many variable factors are considered, especially in the process of acceleration and deceleration due to the addition of physical quantities such as angular acceleration and inertia, which change nonlinearly, increasing the The control difficulty of the system requires real-time monitoring of the acceleration and deceleration process of the system, correction of theoretical parameters, and constant tension within the error range can only be achieved after many tests

[0006] 4. At present, most of the tension control is that the unwinding roller and the winding roller are both cylindrical. In practical application, it cannot deal with many situations and has certain limitations.

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