Magnetic levitation train relative positioning sensor signal processing method and device

Abstract

The invention discloses a magnetic levitation train relative positioning sensor signal processing method and device. The method includes the following steps that S100, a real-time original output signal, disturbed by a joint, of a relative positioning sensor is obtained as a to-be-processed input signal; S200, the input signal is processed through a slip form differentiator, and a tracking signaland a differential signal of the input signal are obtained; and S300, a magnetic pole phase angle signal used for magnetic levitation train motor traction is generated through the tracking signal andthe differential signal of the processed input signal. The method and device have the beneficial effects that distorted signal processing capacity is high, the tracking accuracy is high, the processing speed is high, the calculated amount is small, and the occupied storage space is small. The signal generated when a magnetic levitation train passes a stator rail especially the relative positioningsensor on the portion of the rail joint is processed so that accurate position information of the magnetic levitation train can be supplied to a magnetic levitation train traction system to guide andguarantee safety operation of the magnetic levitation train.

Description

technical field [0001] The invention relates to the field of maglev control, in particular to a signal processing method and device for a relative positioning sensor of a maglev train. Background technique [0002] In order to realize the safe operation, precise positioning and speed closed-loop control of the traction direction of the maglev train, a sensor system for measuring the speed and position of the train must be installed on the maglev train. The relative position sensor in the speed measurement and positioning system converts the relative position information in the cogging into 0~60° magnetic pole phase angle output, and the traction control system of the maglev train needs 0~360° magnetic pole phase angle for motor traction, so the magnetic pole The phase angle processing unit needs to synthesize a 0~360° magnetic pole phase angle signal based on the 0~60° magnetic pole phase angle information output by the relative position sensor and the cogging number. In ac...

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Problems solved by technology

There are also many methods for signal prediction, usually forward linear prediction, backward linear prediction, etc. In addition, discrete forms of Kalman filter, adaptive filter, etc. also have the function of signal prediction, among which the adaptive filter based The signal prediction method has been successfully used in the seam switching of the current positioning and speed measurement system, but there is a common problem in these signal prediction methods, that is, it needs to store a large amount of signal data at the previous time, occupying valuable storage space, and the amount of calculation Larger, which is not ideal for the maglev train positioning and speed measurement system with high real-time requirements

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