Airplane brake control method based on pedal deceleration rate control
A technology of brake control and deceleration rate, applied in aircraft braking arrangement, brakes, brake regulators, etc., which can solve problems such as low versatility, difficulty in compensating for individual differences in servo valves, and poor pilot interaction.
Active Publication Date: 2019-09-27
XIAN AVIATION BRAKE TECH
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[0018] In order to overcome the shortcomings in the prior art that the brake control process is difficult to compensate for the individual differences of the servo valve, the interaction with the pilot is poor, and the versatility is low, the present invention proposes an aircraft brake control based on pedal deceleration rate control method
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[0048] This embodiment is an aircraft braking control method based on pedal deceleration rate control, and the applicable anti-skid braking system adopts a conventional fly-by-wire anti-skid braking system or a conventional all-electric anti-skid braking system. The anti-skid braking system adopts a fly-by-wire anti-skid braking system.
[0049] This embodiment includes the following steps:
[0050] Step 1, preset deceleration rate a p adjustment of:
[0051] The anti-skid brake system is based on the pedal stroke command voltage U b Determine the preset deceleration rate a by formula (6) p :
[0052] a p = kU b (6)
[0053] In the formula (6), k is the calculation coefficient of the preset deceleration rate.
[0054] The calculation coefficient of the preset deceleration rate k=1.2; the pedal stroke command voltage U b =0~4.2VDC.
[0055] In this embodiment, the preset deceleration rate a p 0~5.04m / s 2 .
[0056] A preset deceleration rate tolerance n is set for ...
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The invention provides an airplane brake control method based on pedal deceleration rate control. The pedal travel instruction voltage Ub and the preset deceleration rate ap are associated, wherein the larger the pedal travel instruction voltage Ub is, the larger the preset deceleration rate ap is; or otherwise, the preset deceleration rate ap is smaller. The real-time deceleration rate av is determined according to the preset deceleration rate ap. When the real-time deceleration rate av is smaller than the preset deceleration rate ap, the brake current Ib is increased; or otherwise, the brake current Ib is reduced; and when the real-time deceleration rate av is equal to the preset deceleration rate ap, the brake current Ib is kept unchanged. The process compensates for the individual differences between parts such as servo valves, and accurate deceleration rate control is achieved by adjusting the brake current Ib. During control, the expectation of a pilot can be well perceived, when a runway is slippery, the small preset deceleration rate ap is set, and the situation that a brake system frequently slips is avoided; and when the runway is dry and urgent, the large preset deceleration rate ap is set, and the situation that the brake distance of an airplane is long, and even the airplane rushes out of the runway is avoided.
Description
technical field [0001] The invention relates to the technical field of aircraft brake control, in particular to an aircraft brake control method. Background technique [0002] During the landing process of an aircraft, the braking system is very important, and the control method of the anti-skid braking system determines the reliability, comfort and braking efficiency of the braking process. Excellent control methods can improve aircraft landing reliability, comfort and braking efficiency. [0003] At present, most aircraft braking systems use constant deceleration rate control, and the pedal stroke is used to adjust the braking pressure, not the deceleration rate. The constant deceleration rate control method makes the aircraft braking process poor adaptability and low efficiency, often causing adverse consequences in emergency situations, such as rushing off the runway. The pedal stroke is used to adjust the brake pressure. The constant deceleration rate control method a...
Claims
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IPC IPC(8): B64C25/46B60T8/17B60T8/172
CPCB64C25/46B60T8/1703B60T8/172
Inventor 张仲康张思涵
Owner XIAN AVIATION BRAKE TECH