Control method of speed regulator of servo system of flat knitting machine

A technology of speed regulator and servo system, which is applied in the field of control algorithm of AC servo system, and can solve problems such as difficult to meet control requirements

Inactive Publication Date: 2012-08-01
HANGZHOU DIANZI UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

The computerized flat knitting machine in actual engineering, the control algorithm of its servo system adopts the traditional PID control, but the PID control is based on the mathematical model control

Method used

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  • Control method of speed regulator of servo system of flat knitting machine
  • Control method of speed regulator of servo system of flat knitting machine
  • Control method of speed regulator of servo system of flat knitting machine

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Embodiment Construction

[0038] Such as figure 1 shown. The control method of the speed regulator of the flat knitting machine servo system proposed by the present invention comprises the following steps:

[0039] Step 1. Determine the input and output variables of the fuzzy controller

[0040] The present invention takes the running speed of the transmission mechanism of the computerized flat knitting machine as the control object, and calculates the difference between the actual reference speed and the feedback speed value and the rate of change of the difference As the input of the fuzzy controller, the variation of the parameters of the traditional PI controller , as output.

[0041] Step 2. Select the input and output membership function and its domain

[0042] 1) Select the membership function

[0043] input bias and the rate of deviation change , and output and The universe of variable fuzzy set is [-6, 6], and its membership function adopts triangular function, as shown in F...

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Abstract

Aiming at the defects in the prior art, the invention discloses a control method of a speed regulator of a servo system of a flat knitting machine. A system in the prior art has low adaptability and low stability. According to a fuzzy proportional-integral (PI) control algorithm of the control method, the running speed of a transmission mechanism of the computerized flat knitting machine is used as a control object; the difference value between the practical reference speed and the feedback speed and the change rate of the difference value are served as input of a fuzzy controller; the input quantity is fuzzified through selecting an appropriate universe of discourse and an appropriate membership function; appropriate fuzzy rule tables are set by utilizing the practical tuning strategies of PI parameters; and after a Mamdani fuzzy reasoning algorithm and defuzzification processing are adopted, the variable quantities of parameter values of the PI controller are output, thereby realizing on-line correction of the PI parameters. By adopting the control method, the disadvantages of a traditional manual correction method for the PI parameters are overcome, and on-line real time correction of the PI parameters is realized, thereby improving the adaptability and the stability of the system.

Description

technical field [0001] The invention belongs to the technical field of control algorithms of an AC servo system, in particular to a control method for a speed regulator of a flat knitting machine servo system. Background technique [0002] With the continuous development of the garment industry, especially the rapid development of the knitting industry, it has become one of the pillar industries of the textile industry. In recent years, my country's knitting industry has been growing steadily, especially in Zhejiang Province and other regions, there are already a number of relatively concentrated knitwear production and sales bases. [0003] The computerized flat knitting machine is a double-needle bed weft knitting machine. It has always been the main machine for the production of cashmere and knitted sweaters. Computerized flat knitting machine is a kind of mechatronics equipment, its structure is complex, it involves power electronics technology, motor technology, microe...

Claims

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Application Information

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IPC IPC(8): G05B13/04D04B15/99
Inventor 刘栋良武瑞斌张瑶郑谢辉
Owner HANGZHOU DIANZI UNIV
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