Adaptive control method for current loop of magnetic levitation system

An adaptive control and magnetic levitation technology, which is applied in the direction of adaptive control, general control system, control/adjustment system, etc., can solve the problems affecting the overall performance of the magnetic levitation system, affecting the current loop current rise time and gain, etc., to overcome the levitation system Unstable performance, stable and reliable suspension performance, simple and convenient effect

Inactive Publication Date: 2012-03-28
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] In the actual operation process, the temperature of the electromagnet will change. With the change of the temperature of the electromagnet, the resistance and inductance of the magnet coil will change greatly, which will affect the current rise time and gain of the current loop. Will affect the overall performance o

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  • Adaptive control method for current loop of magnetic levitation system
  • Adaptive control method for current loop of magnetic levitation system
  • Adaptive control method for current loop of magnetic levitation system

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Embodiment Construction

[0030] Such as image 3 As shown, the implementation steps of the current loop adaptive control method of the magnetic levitation system in the embodiment of the present invention are as follows:

[0031] 1) After the maglev system is levitated, judge whether the maglev system is stable or not;

[0032] 2) If the suspension is stable, then collect the suspension stabilization current I and the suspension stabilization voltage U of the magnetic levitation system coil, and obtain the suspension stabilization resistance R of the coil according to the suspension stabilization current I and the suspension stabilization voltage U in combination with R=U / I;

[0033] 3) Superimpose the high-frequency current that does not change the levitation gap of the magnetic levitation system to the coil, and collect the current I of the coil multiple times during the coil current change process i (i=1, 2, 3...) and voltage U i (i=1, 2, 3...), according to the current I collected by the coil du...

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Abstract

The invention discloses an adaptive control method for a current loop of a magnetic levitation system. The method comprises the following steps of: 1) judging whether the magnetic levitation system levitates stably after the magnetic levitation system levitates; 2) if the magnetic levitation system levitates stably, collecting the levitation stable current and levitation stable voltage of a coil of the magnetic levitation system, and obtaining a levitation stable resistor R of the coil; 3) superposing high-frequency current to the coil, collecting the current and voltage of the coil multiple times in the current change process of the coil, obtaining multiple inductance values in the current change process of the coil, and averaging the multiple inductance values to obtain a stable-state average inductance value L; and 4) obtaining a feedback gain Kb and a forward gain Kf of the coil, and applying the feedback gain Kb and forward gain Kf to the current loop as current loop control parameters. The method disclosed by the invention has the advantages that: the current rise time in the coil and the gain of the current loop are always kept unchanged, the levitation performance is not influenced by the change of the resistance and inductance of the coil, and the levitation performance is stable and reliable.

Description

technical field [0001] The invention relates to current loop control of a magnetic levitation system, in particular to a current loop self-adaptive control method for the magnetic levitation system. Background technique [0002] Suspension control technology is one of the core technologies of the maglev system, such as figure 1 As shown, the basic structure of the maglev system consists of a levitation magnet 1 , a levitation sensor 2 , a levitation controller 3 and a power amplifier 4 . Among them, the levitation magnet 1 is composed of a coil and an iron core, and the levitation magnet 1 is used to provide power for the maglev train; the levitation sensor 2 is used to detect the state of the levitation magnet 1, which includes a gap sensor and a current sensor, wherein the gap sensor obtains the levitation gap signal x, the current sensor obtains the current signal i. The function of the suspension controller 3 is the same as that of other similar systems. It is used to ...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 刘恒坤李云钢张晓程虎龙娟弥柱
Owner NAT UNIV OF DEFENSE TECH
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