Feed-forward-fuzzy proportion integration differentiation (PID) control-based control method for paper cutting machine

Abstract

The invention relates to a feed-forward-fuzzy proportion integration differentiation (PID) control-based control method for a paper cutting machine. The method comprises the following steps of: setting a paper cutting length and the frequency of a cutter after system initialization, cutting paper under the control of a single-closed loop control and ratio control system, and stopping the paper cutting machine after the cutting of the paper is finished. The speed V of a paper feeding roller is controlled in a fuzzy PID control way on the basis of the conventional single-closed loop control andratio control over the speed of the cutter, so that the dynamic response and steady-state characteristics of a system are improved; namely, a fuzzy control mode is adopted, and a fuzzy controller is additionally arranged on a PID regulator, takes an error value E and an error change rate DeltaE as input language variables, and takes a proportional gain coefficient KP, an integral gain coefficientKI and a differential gain coefficient KD as output language variables, so that the PID regulator is controlled; and in addition, a feed-forward controller is arranged behind an execution mechanism, so that the problem that the speed V of the paper feeding roller is fluctuated by load disturbance is solved, and the fluctuation of the rotating speed n of the cutter is also alleviated.

Description

technical field [0001] The invention relates to a paper cutter control method based on feedforward-fuzzy PID control. Background technique [0002] The main structure of the on-site cylinder cutter paper cutter is as follows: figure 1 As shown, there are paper unwinding roller 1, longitudinal cutter 2, first paper feeding roller 3, first transverse cutter 4, second paper feeding roller 5, second transverse cutter 6, paper guide roller 7, tension sensor 8 and so on. When working, firstly, after the base paper comes out of the paper roll on the unwinding roller 1, the wide-width paper is cut into two or several narrow-width papers that meet the requirements through the longitudinal cutter 2, and then passes through the first paper feeding roller 3 to move forward. One of the paper strips is directly sent to the first transverse cutter 4, and the other paper strip continues forward through the second paper feed roller 5 to the second transverse cutter 6, and then the paper is...

AI Technical Summary

Problems solved by technology

Due to the existence of external disturbances, the linear velocity V of the paper feed roller is easy to change, so the cutter control is a follow-up control system, and the cutter speed n has a certain hysteresis, so it is difficult to guarantee the accuracy of the cutting length L

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