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Airplane turning limitation control method through differential braking

A brake control and aircraft technology, applied in the direction of aircraft brake arrangement, brake regulator, etc., can solve the problem of safety hazards that cannot meet the requirements of fast turning

Inactive Publication Date: 2015-08-19
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art that cannot meet the requirements of fast turning and have potential safety hazards, the present invention proposes a method of using differential braking to control the extreme turning of the aircraft

Method used

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  • Airplane turning limitation control method through differential braking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] This embodiment is a method for a certain type of aircraft to achieve extreme turning control only through differential braking when the maximum allowable friction coefficient μ between the tire and the runway is 0.3 under the current taxiing conditions. The specific process is:

[0086] Step 1, determine the maximum allowable friction coefficient under the current taxiing condition of the aircraft. The maximum allowable coefficient of friction μ is comprehensively determined according to the runway conditions, the pilot's control experience, the urgency of the turning task, tire conditions and weather conditions. Maximum allowable coefficient of friction μ = 0.3 ~ 0.6.

[0087] In this embodiment, there is water on the runway, and the pilot's control experience is average, so it is determined that the maximum allowable friction coefficient μ between the tire and the runway is 0.3 under low-speed taxiing conditions.

[0088] Step 2, set up the motion and dynamics equat...

Embodiment 2

[0137] In this embodiment, when the maximum allowable friction coefficient μ between the tire and the runway is 0.4, a certain type of aircraft realizes extreme turning control only through differential braking, and the specific process is the same as that of Embodiment 1. specifically is:

[0138] Step 1, determine the maximum allowable friction coefficient under the current taxiing condition of the aircraft. The maximum allowable coefficient of friction μ is comprehensively determined according to the runway conditions, the pilot's control experience, the urgency of the turning task, tire conditions and weather conditions. Maximum allowable coefficient of friction μ = 0.3 ~ 0.6.

[0139] In this embodiment, the runway is relatively wet and the experience level of the pilot is average, so it is determined that the maximum allowable friction coefficient μ between the tire and the runway is 0.4 when taxiing at a low speed.

[0140] Step 2, establishing the motion and dynamic ...

Embodiment 3

[0147] This embodiment is a method for a certain type of machine to realize extreme turning control only through differential braking when the maximum allowable friction coefficient μ between the tire and the runway is 0.5, and the specific process is the same as that of embodiment 1. specifically is:

[0148] Step 1, determine the maximum allowable friction coefficient under the current taxiing condition of the aircraft. The maximum allowable coefficient of friction μ is comprehensively determined according to the runway conditions, the pilot's control experience, the urgency of the turning task, tire conditions and weather conditions. Maximum allowable coefficient of friction μ = 0.3 ~ 0.6.

[0149] Although the runway in this embodiment is relatively good, the experience level of the pilot is average. In order to ensure safety, the maximum allowable friction coefficient μ between the tire and the runway is determined to be 0.5 when taxiing at a low speed.

[0150] Step 2,...

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Abstract

Disclosed is an airplane turning limitation control method through differential braking. The ground friction is utilized to the utmost extent, on the premise of guaranteeing the stable and safe airplane turning process, according to different turning requirements, the engine thrusting force and braking torque state parameters controlling the airplane turning most efficiently are provided to pilots correspondingly, the airplane turns in the highest turning speed, the airplane operating potential is played to the utmost extent, the front and main wheel wearing is reduced during turning, the engine oil consumption is low, and the airplane is prevented from skidding and tipping. Thus, the maximum friction coefficient of the wheels and runway is of the input amount, and the method has the advantages of high turning speed and stability, safety and efficiency of the turning process.

Description

technical field [0001] The invention relates to a control method for controlling the aircraft to turn at the maximum limit speed under the premise of ensuring safety by using different braking pressures on the left and right wheels when the pilot is taxiing at a low speed on the ground. Background technique [0002] Most of the early aircraft did not have an active front wheel turning control device. When taxiing on the ground and needing to turn, especially when taxiing at low speeds, the rudder basically has no control over the direction of the aircraft, so it is up to the pilot to control the left and right. Different braking pressures are applied to the wheels to control the turning of the wheels. When taxiing on the ground, the front wheel is in the swing-reduced state, that is, it follows the nose for yaw, but in the yaw process, it is subjected to the damping force exerted by the shock absorber installed on the front landing gear. The damping force generated by the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C25/48
Inventor 张谦张颖姝
Owner XIAN AVIATION BRAKE TECH
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