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Gap differential signal extraction method and system for high-speed maglev train

A differential signal and gap signal technology, applied in the direction of electric vehicles, vehicle components, electric traction, etc., can solve problems such as unfavorable control systems, amplified noise, etc., and achieve good control effects

Active Publication Date: 2022-03-11
湖南凌翔磁浮科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the suspension control systems directly use the conventional differential algorithm to obtain the gap differential signal, but it will amplify the noise, which is not conducive to the control system.

Method used

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  • Gap differential signal extraction method and system for high-speed maglev train

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Experimental program
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Embodiment 1

[0032] This embodiment discloses a method for extracting gap differential signals of high-speed maglev trains, which has a differential effect on signals in a lower frequency range (such as signals within 50 Hz), and has a filtering effect on signals with higher frequencies, so In the required signal frequency range, due to the low frequency of the gap signal, a more accurate gap differential signal can be obtained, and at the same time, it has a filtering effect in the high frequency band, so it can suppress the high frequency noise in the signal to a certain extent. The suspension control system of high-speed maglev train can achieve better control effect. The signal extraction method in this embodiment is mainly implemented based on the constructed gap differential signal extraction model. Specifically, the gap differential signal extraction model is:

[0033] the y n = a x n -b·x n-1 +c·y n-1 -d·y n-2

[0034] In the formula, y n is the differential value of the cu...

Embodiment 2

[0039] This embodiment also discloses a gap differential signal extraction system of a high-speed maglev train. The signal extraction system uses the signal extraction method in Embodiment 1 to obtain the gap differential signal of the high-speed maglev train. Specifically, the signal extraction system includes an information acquisition unit, an information storage unit, an information processing unit, an information extraction unit and a signal output unit. Wherein, the information acquisition unit is used to acquire the gap signal of the current step of the two gap sensors; the information storage unit is connected with the information acquisition unit, and is used to store and obtain the gap signal and the gap differential signal of the historical steps of the two gap sensors; the information processing unit Respectively connected to the information acquisition unit and the information storage unit, used to obtain the gap differential signal of the current step of the two g...

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Abstract

The invention discloses a gap differential signal extraction method and system for a high-speed maglev train, and the method comprises the steps: arranging two gap sensors on each suspension controller in a suspension control system, and enabling the distance between the two gap sensors to be greater than the width of a track joint; based on a gap differential signal extraction model, gap signal differential values of the two gap sensors in the current step are obtained respectively, and the gap signal differential value with the smaller absolute value in the two gap signal differential values is selected as a gap differential signal of the suspension control system in the current step. The method is applied to the technical field of signal extraction, has a differential effect on signals within a relatively low frequency range, and has a filtering effect on signals with relatively high frequency, so that relatively accurate gap differential signals can be obtained, and meanwhile, high-frequency noise in the signals can be inhibited to a certain extent; a good control effect can be achieved in a suspension control system of the high-speed maglev train.

Description

technical field [0001] The invention relates to the technical field of signal extraction, in particular to a method and system for extracting gap differential signals of high-speed maglev trains. Background technique [0002] In the suspension control system of high-speed maglev trains, the suspension controller receives the information of the sensor and the command of the on-board control system, and through the suspension control algorithm, fuses the information of related sensors such as: suspension gap, electromagnet current, acceleration value, etc., and calculates the control amount , use the control amount to control the current in the levitation electromagnet, so as to control the magnetic force between the electromagnet and the track, so as to achieve the purpose of stable levitation. [0003] When designing the control algorithm, the differential signal of the levitation gap is an indispensable state quantity. The gap differential signal cannot be directly measured...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L13/06
CPCB60L13/06
Inventor 刘恒坤
Owner 湖南凌翔磁浮科技有限责任公司