Multi-wheel-train brake system and control method thereof

Abstract

Disclosed are a multi-wheel-train brake system and a control method thereof. An antiskid control box conducts logical operation on brake pressure state signals output by hydraulic pressure relays and speed state signals of an airplane, and whether the airplane is in a low-speed and low-energy state or other states is determined; when the airplane is in a low-speed and low-energy state, the antiskid control box controls electro-hydraulic pressure servo valves not to output the brake pressure to a left front airplane wheel set and a right front airplane wheel set, and the left front airplane wheel set and the right front airplane wheel set are forbidden from braking; and under the other conditions, the left front airplane wheel set, the right front airplane wheel set, a left rear airplane wheel set and a right rear airplane wheel set carry out braking. The characteristic of the large brake torque of brake main airplane wheels of a carbon brake disc in the low-speed and low-energy stage of the airplane is fully utilized, under the premise that the using requirements of the airplane for the brake system are met, and the brake times of the brake airplane wheel sets are decreased by decreasing the number of the airplane wheel sets, so that the problem of serious abrasion of the carbon brake disc in a low speed is solved, and accordingly the service life of the brake main airplane wheels is prolonged.

Description

technical field [0001] The invention relates to the field of aircraft brakes, in particular to a multi-wheel brake system and a design method thereof for prolonging the service life of aircraft carbon brake discs. Background technique [0002] C / C composite brake material has the advantages of good friction characteristics, strong heat absorption capacity, and long service life; however, under the low-speed and low-energy conditions of the aircraft, the carbon brake disc wears a lot, resulting in a short service life. [0003] The prior art discloses a multi-wheel system brake system with eight main brake wheels. The schematic diagram of a multi-wheel train aircraft anti-skid braking system is shown in figure 1 . The system consists of decompression valve 1, electro-hydraulic pressure servo valve 2, conversion valve 3, quantifier 4, speed sensor 5, anti-skid control box 6, fault light 7, anti-skid light 8 and anti-skid switch 9. Among them, the carbon brake wheels are ins...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of large wear and short service life of carbon brake discs in the prior art, the present invention proposes a multi-wheel system brake system and its control method

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