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Control method of aircraft carbon-ceramic wheel brake system with adjustable maximum brake pressure

A brake system and a technology of carbon ceramic wheels, which are applied in the field of aircraft carbon ceramic wheel brake systems, can solve the problem of no aircraft carbon ceramic wheel brake system control technology, and no use of aircraft drag parachute signals to control aircraft carbon ceramic wheel brake systems Technical reports and other issues

Active Publication Date: 2017-05-24
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After searching, there is no published control technology of aircraft carbon-ceramic wheel brake system in China, and there is no technical report on using aircraft drag parachute signal to control aircraft carbon-ceramic wheel brake system

Method used

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  • Control method of aircraft carbon-ceramic wheel brake system with adjustable maximum brake pressure
  • Control method of aircraft carbon-ceramic wheel brake system with adjustable maximum brake pressure
  • Control method of aircraft carbon-ceramic wheel brake system with adjustable maximum brake pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0065] This embodiment is a method for controlling the brake system of a certain type of carbon-ceramic machine wheel brake through a drag umbrella. The specific process is as follows:

[0066] Step 1: The anti-skid control box receives the drag parachute control command

[0067] When the aircraft is landing, it sends a drag parachute signal to the anti-skid control box.

[0068] There are two ways to slow down an airplane when it is landing, one is to release the drag parachute, and the other is to not release the drag parachute.

[0069] If the drag parachute is not released when the aircraft is landing, the anti-skid control box of the carbon-ceramic wheel brake system receives the control command as "0"; if the aircraft is landing, the anti-skid control box of the carbon ceramic wheel brake system receives the control command. Is "1".

[0070] The drag parachute signal sent out when the plane is landing is expressed by formula (1):

[0071]

[0072] In this embodiment, when the airc...

Embodiment 2

[0122] This embodiment is a method for controlling the brake system of a certain type of carbon-ceramic machine wheel brake when the drag parachute is not released, that is, when the drag parachute signal is "0", the specific process is:

[0123] Step 1, the control logic of the carbon-ceramic wheel brake system

[0124] When the aircraft is landing, turn on the anti-skid switch, the carbon ceramic wheel brake system works, the drag parachute signal sent by the aircraft and the control command received by the carbon ceramic wheel brake system control logic is determined by formula (1):

[0125]

[0126] When the aircraft is landing, do not release the drag parachute, the brake control box of the carbon ceramic wheel brake system receives a control command of "0"; when the aircraft is landing, the drag parachute is released, and the brake control box of the carbon ceramic wheel brake system receives a control command of " 1".

[0127] In this embodiment, the drag parachute is not relea...

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Abstract

The invention relates to a control method for an aircraft carbon-ceramic wheel braking system with adjustable maximum braking pressure. The braking pressure of the carbon-ceramic wheel braking system is controlled through a drogue chute signal, wherein when the drogue chute signal is 1, the friction coefficient of a carbon-ceramic composite brake pad is normal, and an aircraft is braked and stopped with rated braking pressure through the carbon-ceramic wheel braking system; and when the drogue chute signal is 0, the friction coefficient of the carbon-ceramic composite brake pad becomes lower, the maximum braking pressure braking instruction of the carbon-ceramic wheel braking system is output by an anti-skid control box, and the carbon-ceramic wheel braking system multiplies the rated braking pressure according to a preset proportionality coefficient so that the braking pressure can be maximum. A method for increasing the braking pressure of the carbon-ceramic wheel braking system is used for eliminating the influences caused by decrease of the friction coefficient of the carbon-ceramic composite brake pad on braking torque and braking efficiency, and the problem that the braking efficiency of the carbon-ceramic wheel braking system is low when the landing speed of the aircraft is high or the drogue chute signal is 0 is solved. The braking efficiency and the reliability in the landing process of the aircraft are guaranteed.

Description

Technical field [0001] The invention relates to an aircraft carbon-ceramic wheel brake system, in particular to a carbon-ceramic wheel brake system control method which is controlled by a drag parachute signal and realizes an adjustable maximum brake pressure. Background technique [0002] Carbon ceramic composite material is a new material used in aircraft brake wheels. Carbon ceramic composite material gathers the advantages of powder metallurgy materials and carbon / carbon composite materials. It has good oxidation resistance, strong corrosion resistance, mechanical properties and thermal physics Excellent performance and good friction and wear performance. [0003] However, in actual use, it is found that the friction coefficient of carbon-ceramic composite brake pads will also change correspondingly when the landing speed of the aircraft is different. When the landing speed of the aircraft is higher than a certain value, the friction coefficient of the carbon-ceramic composite ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C25/44
Inventor 刘忠平韩亚国张万顺刘辉
Owner XIAN AVIATION BRAKE TECH
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