Method for controlling operations of shaker of computerized flat knitting machine

Abstract

The invention belongs to the technical field of computerized flat knitting machines, in particular to a method for controlling operations of a shaker of a computerized flat knitting machine. The method comprises the following steps: collecting real-time operation information of a servo motor; inputting the obtained operation information of the servo motor into an information processor to calculate; calculating an offset value in the step (2) by adopting an adaptive fuzzy PID control algorithm so as to obtain current revised data and then inputting the revised data into a program controller; calculating current Kp, Ki and Kd values by utilizing a fuzzy self-tuning rule and carrying out discretization processing through an incremental PID calculation; and outputting control signals to the servo motor by the program controller according to a control program to realize the automatic operation error correction and the precise operation control of the shaker. The invention can avoid needle transferring and connecting deviations and ensure that the computerized flat knitting machine works in an optimal state all the time, thereby solving the problem of unstable precision of the shaker inan operation process of the computerized flat knitting machine.

Description

technical field [0001] The invention belongs to the technical field of computerized flat knitting machines, in particular to a method for controlling the operation of a shaker in a computerized flat knitting machine. Background technique [0002] In the prior art, the knitting process of a computerized flat knitting machine needs to be completed by the coordinated work of a needle selector, a pressure plate, a yarn feeder, a machine head, a needle pressing motor, a cloth rolling motor and a shaking table mechanism. In the computerized flat knitting machine, the shaker motor and the ball screw are connected by a synchronous toothed belt, and the needle bed traverse is generally realized by a servo or stepping motor—the ball screw and nut auxiliary transmission, and the control system sends out electric power according to the displacement. The pulse signal is fed back by the photoelectric encoder at the rear end of the motor, and driven by the synchronous pulley and the screw ...

AI Technical Summary

Problems solved by technology

Insufficient accuracy of the shaker will lead to the deviation of the stitches, so that the computerized flat knitting machine cannot complete the pattern or leave flaws on the knitted clothes

Domestic and foreign counterparts generally use open-loop control of the shaking table. This method is simple and easy to implement, but it is not accurate.

In addition, due to wear, aging and other reasons, its mechanical characteristics will also change. This complex and changeable characteristic is difficult to describe with a mathematical model. It is one of the urgent problems that people need to solve to control the accuracy of the shaking table.

Images