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Sensorless tension identification method for two-motor speed regulating system

A technology of motor speed regulation and identification method, which is applied in multiple motor speed/torque control, electronic commutator and other directions, can solve the problems of difficult installation, many material and environmental constraints, and high-precision tension sensors are expensive. Achieve the effect of wide application range, high application value, enhanced approximation and anti-interference ability

Active Publication Date: 2015-12-23
JIANGSU UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a sensorless tension identification method for a two-motor speed control system, which is used to overcome the disadvantages of high-precision tension sensors, which are expensive, difficult to install, and have many material and environmental constraints, and realize the tension of the two-motor speed control system. sensorless high-precision identification

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  • Sensorless tension identification method for two-motor speed regulating system

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0042] The present invention is as figure 1 The two-motor speed control system platform shown is implemented on the basis. The system includes two frequency converters and two induction motors. The induction motor is connected to the driving roller through a reducer. The two driving rollers are connected by a belt. The belt is equipped ...

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Abstract

The invention discloses a sensorless tension identification method for a two-motor speed regulating system. The method comprises the following steps: deducing a tension sub-system left-inverse model according to a mathematical model of a speed regulating system that two frequency converters drive two induction motors; adding two inputs of a tension set value F<s> and a tension error e<F> to form a six-input left-inverse system on the basis of an original left-inverse system to enhance the approximation capability and the anti-jamming capability of a neural network; carrying out characteristic quantity extraction on inputs of the neural network by wavelet analysis in advance; training the neural network with a novel function, and restraining the weight of the neural network; and achieving the complete set of neural network algorithm in a programmable logic controller (PLC), and achieving soft measurement of the tension of a two-motor speed regulating system platform. According to the sensorless tension identification method, a high-precision tension sensor with high price is reduced; other extra hardware is not increased; the system cost can be reduced; and in addition, the sensorless tension identification method is wide in application range, is not limited by material and environment factors, and has relatively high application value.

Description

technical field [0001] The invention relates to a sensorless tension identification method for a two-motor speed control system, specifically using a neural network left inverse method to realize tension identification, which is suitable for tension detection in a speed control system driven by two frequency converters and two induction motors, and belongs to soft measurement and The technical field of soft instrument construction. Background technique [0002] Multi-motor speed control systems are widely used in metallurgy, papermaking, textile, printing and other modern industrial fields. This type of system requires multiple motors to convey and grab materials. The stability of tension is an important factor to ensure the efficiency of conveying and grabbing. Stable tension can not only ensure that the material will not be broken due to excessive tension, but also can ensure that the material will not accumulate due to slack. The traditional method is to realize the dete...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/04H02P6/18
Inventor 赵文祥陈杰刘国海周华伟张多袁俊
Owner JIANGSU UNIV
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