Braking pressure correction method for braking system

A technology of braking system and correction method, which is applied to vehicle parts, brakes, transportation and packaging, etc., can solve the problems of quantification, lack of control accuracy, and no proposed method of braking pressure correction of braking system, so as to improve consistency and prevent yaw. , the effect of reducing the pressure difference

Active Publication Date: 2016-06-08
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this utility model only connects the systems, that is, it does not quantify the control

Method used

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Examples

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Example Embodiment

[0060] Specific implementation method

[0061] This embodiment is a pressure correction method proposed based on the required value of the brake pressure of an aircraft's anti-skid brake system as 10±0.5MPa. Through pressure correction, the wheel brake pressure deviation of the anti-skid brake system is controlled within ±0.25 MPa to ensure the aircraft heading, avoid yaw, and meet the aircraft braking distance requirements.

[0062] The details of this embodiment are as follows:

[0063] Step 1: Determine the oil return pressure P of the anti-skid brake system 0

[0064] The oil return pressure of the aircraft brake system is the pressure of the pressurized fuel tank of the aircraft hydraulic system, generally not greater than 2MPa.

[0065] Step 2: Determine the pressure gain K of the electro-hydraulic pressure servo valve 1 And dead zone current I F0

[0066] After the system gives the return pressure, the pressure gain K of the electro-hydraulic pressure servo valve is determined ac...

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PUM

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Abstract

The invention discloses a braking pressure correction method for a braking system. The braking pressure determined through a braking command signal Vs serves as the standard braking pressure. The braking pressure of airplane wheels is output to an anti-skid braking control box, the standard braking pressure is compared with the braking pressure output through an anti-skid braking system, and after comprehensive controlling is conducted, a braking command signal which is subjected to pressure correction is output. The command signal subjected to pressure correction controls an electro-hydraulic pressure servo valve to output the braking pressure, and braking pressure correction is achieved; accordingly, the difference value between the standard braking pressure and the actual braking pressure is decreased, and meanwhile the pressure difference value of the actual braking pressure of two side airplane wheels of an airplane is decreased. By means of the braking pressure correction method, the braking pressure of the left airplane wheel and the braking pressure of the right airplane wheel of the airplane are made to be consistent, and the braking pressure of the airplane anti-skid braking system and the control current output through the anti-skid braking control box are made to be consistent; the airplane is prevented from off-course and even runway excursion, and the safety of airplane braking is ensured.

Description

technical field [0001] The invention relates to the field of digital fly-by-wire braking systems of aircraft, in particular to a method for calibrating the braking pressure of the braking system. Background technique [0002] The anti-skid brake control box in the digital fly-by-wire anti-skid brake system receives the brake command signal output by the brake command sensor. The anti-skid brake control box processes the brake command signal and outputs a control current to drive the electro-hydraulic pressure servo valve. The output of the electro-hydraulic pressure servo valve and The brake pressure P corresponding to the control current output by the anti-skid brake control box. [0003] The output control current signal of the anti-skid brake control box is determined by formula (1): [0004] I F =K 2 (V s -V s0 -V F )+I F0 V s >V s0 [0005] I F = I F0 V s <V s0 (1) [0006] In the formula: I F is the output control current of the anti-skid brake co...

Claims

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Application Information

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IPC IPC(8): B60T13/74
CPCB60T13/74
Inventor 刘忠平韩亚国亢敏
Owner XIAN AVIATION BRAKE TECH
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