Dynamic simulation method of using differential braking to control aircraft turning process

A braking control and dynamic simulation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of difficult and accurate calculation of the aircraft turning process.

Active Publication Date: 2015-12-02
XIAN AVIATION BRAKE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deflection of the front wheel is also affected by some complex inertial forces, making it difficult to accurately calculate the seemingly simple turning process of the aircraft

Method used

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  • Dynamic simulation method of using differential braking to control aircraft turning process
  • Dynamic simulation method of using differential braking to control aircraft turning process
  • Dynamic simulation method of using differential braking to control aircraft turning process

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Embodiment 1

[0112] This embodiment is a dynamic simulation method for controlling the turning process of an aircraft by using differential braking.

[0113] In this embodiment, when the aircraft taxis in a straight line, the initial speed of turning is 20Km / h; the engine thrust controlled by the pilot continues to maintain 24000N; the pilot only applies brake pressure to the left wheel, so that the brake torque output by the wheel remains 6000N , and the calculation method of the dynamic process of the aircraft turning in the case of free rolling of the right wheel, specifically:

[0114] Step 1, establish the motion and dynamic equations of the aircraft:

[0115] The motion and dynamic equations of the aircraft refer to the motion and dynamic equations for the aircraft to achieve stable turning when taxiing at low speeds, including the aircraft rotation moment balance equation, the aircraft's turning moment equation around the instantaneous center of rotation A, and the aircraft's turnin...

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PUM

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Abstract

The invention discloses a dynamic simulation method of using differential braking to control an aircraft turning process. The method comprises: by changing a structural parameter of an aircraft, an initial turning state parameter, torque applied by a pilot to braking, an engine thrust control parameter, and by using Matlab simulation software, and in a Simulink environment, calculating a turning angle of each time, a turning angular velocity of each time, a turning radius of each time, a turning linear speed of each time, as well as a lateral force applied by the ground to a front and a main wheel in the aircraft turning process; and checking the lateral force subjected by the wheels by using of a peak friction coefficient between the wheels and a runway according to the condition of the runway. The method provided by the invention can be applied to design the capability of using differential braking to control the aircraft turning process; a simulation tool is used to optimize the design in each step; and a ground maneuvering capability in the condition of using only differential braking to control the aircraft turning is accurately predicted.

Description

technical field [0001] The invention relates to the field of aircraft braking control, in particular to a dynamic simulation method for controlling the turning process of an aircraft by using differential braking. Background technique [0002] Xi'an Aviation Technology Brake Co., Ltd. proposed a method of using differential braking to control the extreme turning of the aircraft in the invention with the application number 201510219404.4. The aircraft that this method is aimed at is an aircraft that does not have an active front wheel steering control system. The state parameters and control parameters of this aircraft to achieve continuous and stable turning under various working conditions and turning requirements are studied, and it is pointed out that the aircraft is in various conditions. Steady and stable steering method in cornering state. In the invention with the application number 201510428031.1, a method of using differential braking to control the minimum turning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张谦张颖姝
Owner XIAN AVIATION BRAKE TECH
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