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Aircraft braking antiskid control method and aircraft braking system

A control method and technology of a braking system, which is applied in the field of aircraft brake anti-skid control, can solve problems such as longer rolling distance, small combination coefficient between wheels and runway, and reduced braking efficiency, so as to reduce the control burden and psychological pressure, and reduce braking. Skill requirements, effects of addressing potential accident hazards

Inactive Publication Date: 2018-08-07
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a passive control idea, which is not conducive to ensuring safe use
When braking at high speed, due to the large lift of the aircraft, the combination coefficient between the wheels and the runway is small. If the brakes are applied with full pressure (maximum brake pressure) or higher pressure, it is easy to brake the wheels or burst the tires, which is very likely to cause accidents or accidents. Symptoms, threats to flight safety
Even if the anti-skid brake system is very reliable, frequent pressure relief adjustments reduce the braking efficiency and the rolling distance becomes longer

Method used

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  • Aircraft braking antiskid control method and aircraft braking system
  • Aircraft braking antiskid control method and aircraft braking system
  • Aircraft braking antiskid control method and aircraft braking system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment is a method for controlling anti-skidding of aircraft brakes.

[0038] The front landing gear wheels of modern aircraft generally do not have brakes, which are called brakeless wheels; the main landing gear wheels are equipped with brakes, which are called braked wheels or braked wheels. This embodiment proposes an aircraft anti-skid braking control method suitable for modern aircraft.

[0039] The concrete process of this embodiment is:

[0040] The first step: brake condition detection. Said braking conditions include aircraft speed, pressure and pilot braking commands.

[0041] The brakes start to detect braking conditions. The wheel speed sensor detects the aircraft speed when braking. If the wheel slips or locks up, the speed signal of the wheel speed sensor is abnormal; the aircraft speed is provided by the flight reference system. The driver's braking command is obtained through a pressure sensor.

[0042] Step 2: Aircraft speed judgment. Co...

Embodiment 2

[0053] This embodiment is an aircraft braking system proposed to implement the aircraft braking anti-skid control method described in Embodiment 1.

[0054] This embodiment includes a brake valve 1 , a pressure sensor 6 , a wheel speed sensor 4 , a control box 5 and an electro-hydraulic servo valve 2 . in:

[0055] The brake valve 1 is installed under the cockpit floor, and is operated by the driver by depressing the brake pedal to output the required brake pressure. The three hydraulic interfaces of the brake valve are the oil inlet of the brake valve, the brake port of the brake valve and the oil return port of the brake valve; the oil inlet of the brake valve is connected with the hydraulic source pipeline of the aircraft pressure supply system, and the brake port of the brake valve is connected with the electric The oil inlet pipeline of hydraulic servo valve 2 is connected, and the oil return port of the brake valve is connected with the aircraft oil return pipeline.

...

Embodiment 3

[0066] This embodiment is an aircraft fly-by-wire braking system proposed to implement the aircraft brake anti-skid control method described in Embodiment 1.

[0067] This embodiment includes a brake command sensor 8 , a wheel speed sensor 4 , a control box 5 , an electromagnetic hydraulic lock 7 and an electro-hydraulic servo valve 2 .

[0068] Wheel speed detection is done by the wheel speed sensor accessory. Antiskid control is done by the control box. The electro-hydraulic servo valve responds to the control current signal of the control box, outputs and adjusts the brake pressure output to the brake wheel.

[0069] The aircraft speed during braking is provided by the wheel speed sensor detection. If the speed signal is abnormal due to wheel slipping or locking, the aircraft speed will be provided by the flight reference system. The driver brake command pressure is provided by the brake command sensor.

[0070]The brake command sensor 8 is installed under the cockpit f...

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Abstract

The invention relates to an antiskid control method for an aircraft brake and an aircraft brake system. An active control concept is adopted, and through combination of aircraft speeds during braking, and through consideration of the influence of lifting force for the high-speed aircraft, actual brake pressure is gradually increased along with the decelerating of the aircraft, dangers that at the beginning of brake, ground attachment coefficients are small, so that the aircraft skids, and even tyres can be exploded due to brake are avoided; besides, requirements for braking skills of a pilot are further reduced, overcoming of human factors is facilitated, and using safety of the aircraft at high speed is guaranteed; the braking pressure is gradually enlarged along with the decelerating of the aircraft, so that potential accident hazards existing in brake of the aircraft at high speed are solved, but also the operating frequency of antiskid control is reduced, and the braking efficiency is improved. The antiskid control method of the aircraft brake and the aircraft brake system disclosed by the invention are suitable for development of a new aircraft, and are suitable for refitting of active service aircraft types.

Description

technical field [0001] The invention relates to an aircraft brake anti-skid control method and system, in particular to a brake anti-skid control method for improving aircraft high-speed braking performance and an aircraft brake system applying the method. Background technique [0002] The aircraft braking system is an integral part of modern aircraft landing gear. Its main function is to shorten the running distance after the aircraft lands, to stop the aircraft as soon as possible, and to prevent the tires from bursting. Over the past few decades, with the advancement of technology, the aircraft braking system has developed greatly, and the anti-skid braking control accuracy and efficiency are better, and many auxiliary functions have been added at the same time. Digital electronic anti-skid braking system is the representative of advanced aircraft application. However, existing technologies and systems also have deficiencies. The lift of an aircraft is closely related t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C25/46B60T8/34
CPCB60T8/341B64C25/46
Inventor 何永乐何文静王红玲
Owner XIAN AVIATION BRAKE TECH
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