Wheel speed collection system and method for airplane braking system

Abstract

The invention discloses a wheel speed collection system and method for an airplane braking system, and the method comprises the following steps: S1, collecting a dual-redundancy wheel speed signal in a collection period; S2, converting the collected dual-redundancy wheel speed signal into two square wave signals, and respectively carrying out the counting; S3, respectively reading the two counting numbers, and determining whether the two counting numbers are the same or not through comparison: determining that the wheel signal collection is normal if the two counting numbers are the same, or else repeatedly carrying out the step S3, wherein the number n of repeated times of step S3 is n, and n is not greater than 10. The system comprises a dual-redundancy wheel speed signal collection module, a wheel speed signal conditioning module, a counting module, a reading module, a comparison module, a circulating module, and an obtaining module. According to the invention, the collected dual-redundancy wheel speed signal is read in one collection period for many times, and the dual-redundancy wheel speed signals are compared, thereby preventing the interference and time delay from causing the wrong obtaining of the wheel speed signals, and guaranteeing the collection accuracy of the wheel speed signals of the system.

Description

technical field [0001] The invention relates to aircraft brake technology, in particular to a wheel speed acquisition system and a wheel speed acquisition method of the aircraft brake system. Background technique [0002] The wheel speed signal is the most important feedback signal of the aircraft braking system. The aircraft ABS system detects the rolling state of the wheel by collecting and calculating the wheel speed signal, judges its slippage, and decides whether the braking system needs to loosen the brakes to make full use of the ground. The friction force provided shortens the braking distance, improves tire wear, and improves braking stability and safety. [0003] Generally, the redundancy form of the dual-signal wheel speed sensor is used to improve the safety and reliability of the system. For the dual-redundancy signal, the usual way to choose which one is normal is to choose whichever is normal. If it is normal, choose according to experience. If it is not norma...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, to propose a wheel speed acquisition system and a wheel speed acquisition method for the aircraft braking system, and to solve the technical problem that wheel speed signal acquisition is prone to misacquisition in the prior art, resulting in low-speed walking and jittering

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