A magnetic levitation projectile shuttle precision weft insertion control method and system, and information processing terminal

A control method, magnetic levitation technology, applied in general control systems, control/regulation systems, textiles and papermaking, etc., can solve problems such as low speed

Active Publication Date: 2020-03-31
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The projectile loom has technological characteristics such as wide width, low speed, high weft insertion rate, wide variety adaptability, and controllable weft tension. At present, other shuttleless looms cannot completely replace it.

Method used

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  • A magnetic levitation projectile shuttle precision weft insertion control method and system, and information processing terminal
  • A magnetic levitation projectile shuttle precision weft insertion control method and system, and information processing terminal
  • A magnetic levitation projectile shuttle precision weft insertion control method and system, and information processing terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] In the dynamic weft insertion mathematical model of the maglev projectile shuttle provided by the present invention, the maglev system uses a magnetic field as a medium to realize energy transfer and transformation. In most cases, magnetic fields are generated by electrical energy. With the change of the gap between the maglev projectile and the weft insertion track in the magnetic field, the strength of the magnetic field generated by the electromagnet also changes accordingly, and the levitation system thus established is an unstable equilibrium point. Through proper feedback, the excitation current changes, resulting in a corresponding change in the magnetic field strength, transforming the unstable equilibrium point into a stable equilibrium point, and ensuring the real frictionless high-speed weft insertion of the suspension gripper.

[0137] The electromagnetic levitation system uses the magnetic field as a medium to realize the transfer and conversion of energy. ...

Embodiment 2

[0188] Adding a correction network to the system changes the entire system, optimizes the given performance indicators, and adds a suitable correction device to make the system's performance fully meet the design requirements.

[0189] System calibration is to add mechanisms or devices to the system to change the frequency characteristics of the system to meet the above-mentioned given performance indicators. The correction device is generally equipped in the forward channel of the system, and the access location depends on the physical characteristics of the correction device itself and the structure of the original system. In general, small and light-weight correction devices are often added to places where the system signal capacity is small and the power is low, that is, in the forward channel closer to the input signal.

[0190] In the design of the control system, the design methods adopted are generally determined according to the form of performance indicators, mainly ...

Embodiment 3

[0193] An embodiment of the present invention provides a lag-lead correction parameter setting method with series correction, which includes the following steps:

[0194] (a) Identify the open-loop frequency response of the controlled object.

[0195] (b) Determine the expected phase margin, amplitude margin and open-loop frequency response of the controlled object according to the actual requirements of the system overshoot, response time, peak value, etc., and change the parameters of the lag-lead-lag corrector to A unary function with the system open-loop cutoff frequency as an argument

[0196] (c) Calculate the lag-lead control parameters. In the present invention, the structural parameter of lag lead correction is:

[0197]

[0198] The frequency parameters of the correction system are selected based on the initial system bode diagram.

[0199] (d) According to design indicators such as steady-state accuracy (error coefficient), phase margin (overshoot) and adjustm...

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PUM

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Abstract

The invention belongs to the technical field of magnetic suspension automatic control, and discloses a magnetic suspension projectile shuttle precision weft insertion control method, a magnetic suspension projectile shuttle precision weft insertion control system, and an information processing terminal. The magnetic suspension projectile shuttle precision weft insertion control method is characterized in that: an exciting winding arranged along a guide rail is supplied with a control current to form a magnetic field distributed along a weft insertion plane; a magnetic suspension shuttle body is equipped with a control module, a permanent magnet sheet array is arranged at the bottom part, the magnetic suspension shuttle body is suspended under the action of the magnetic field, a traveling wave magnetic field changes with the alternating current, and the forward weft insertion / reverse shuttle braking of a projectile shuttle is driven through inputting frequency, amplitude and direction of the alternating current, so as to realize non-contact type weft insertion; the continuous acceleration of the projectile shuttle is controlled by means of a sequential conversion energy storage module; and the projectile shuttle is clamped by a brake after being decelerated by means of a multi-stage electromagnetic drive system, and the forward weft insertion is completed after yarns are snippedoff by means of shearing devices on both sides. The magnetic suspension projectile shuttle precision weft insertion control method and the magnetic suspension projectile shuttle precision weft insertion control system correct a dynamic model of the magnetic suspension projectile shuttle through correcting a network, can effectively improve the operating stability of the projectile shuttle, shorten the response time to be within 0.001 second, control the overshoot to be less than 10%, and increase the steady state error precision to 0.1%.

Description

technical field [0001] The invention belongs to the technical field of magnetic levitation automatic control, and in particular relates to a method and system for controlling weft insertion of a magnetic levitation projectile shuttle, and an information processing terminal. Background technique [0002] At present, the closest existing technology: automatic control is to use the control device to make the working state of the controlled object run according to the predetermined law. In the automatic control system, the reference signal is input to the control device, and the control device controls the controlled object according to the input reference signal, so that the controlled object generates an output signal, and the output signal is fed back to the input terminal of the control device through the feedback link, and compared with the reference Signals are compared, and the control device adjusts its control on the controlled object according to the comparison result....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02D03D47/24
CPCD03D47/24G05B17/02
Inventor 朱里
Owner WUHAN TEXTILE UNIV
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