Braking pressure correction method for braking system

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...

AI Technical Summary

Problems solved by technology

However, this utility model only connects the systems, that is, it does not quantify the control accuracy, nor does it propose a method for correcting the braking pressure of the braking system.