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Control method for aircraft carbon-ceramic wheel braking system with adjustable maximum braking pressure

A braking system and a carbon-ceramic machine wheel technology are applied in the field of aircraft carbon-ceramic machine wheel braking systems, and can solve the problem of not using aircraft drag umbrella signals to control the aircraft carbon-ceramic machine wheel braking system. Technical report, no aircraft carbon-ceramic machine wheel braking system control technology, etc.

Active Publication Date: 2015-12-16
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 for aircraft carbon-ceramic wheel braking system with adjustable maximum braking pressure
  • Control method for aircraft carbon-ceramic wheel braking system with adjustable maximum braking pressure
  • Control method for aircraft carbon-ceramic wheel braking system with adjustable maximum braking pressure

Examples

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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 parachute. The specific process is:

[0066] Step 1, the anti-skid control box receives the control command of the drag parachute

[0067] When the aircraft lands, a drag parachute signal is sent to the anti-skid control box.

[0068] There are two ways to decelerate the plane when it lands, one is to put the drag parachute, and the other is not to put the drag parachute.

[0069] If the aircraft lands without a drag parachute, the anti-skid control box of the carbon-ceramic wheel brake system receives the control command as "0"; if the aircraft lands with a drag parachute, the anti-skid control box of the carbon-ceramic wheel brake system receives the control command to "1".

[0070] The drag parachute signal sent when the aircraft lands is expressed by formula (1):

[0071]

[0072] In this embodiment, the drag parachute is released...

Embodiment 2

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

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

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

[0125]

[0126] When the plane lands without a drag parachute, the brake control box of the carbon-ceramic wheel brake system receives a control command of "0"; when the plane lands with a drag parachute, the brake control box of the carbon-ceramic wheel brake system receives a control command of "0". 1".

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

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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 a carbon-ceramic wheel brake system of an aircraft, in particular to a control method for a carbon-ceramic wheel brake system 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 combines the advantages of powder metallurgy materials and carbon / carbon composite materials. It has good oxidation resistance, strong corrosion resistance, mechanical properties and thermophysical properties. Excellent performance and good friction and wear properties. [0003] However, in actual use, it is found that the friction coefficient of the carbon-ceramic composite brake pad will change accordingly when the aircraft landing speed is different. When the aircraft landing speed is higher than a certain value, the friction coefficient of the carbon-ceramic c...

Claims

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Application Information

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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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