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A data processing method for aircraft polar curve test flight

A technology of flight test data and processing methods, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of increasing flight test costs, achieve the effect of reducing aircraft test subjects, reducing the amount of parameters, and good practicability

Active Publication Date: 2021-04-27
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the flight test data processing for the polar curve of the aircraft is mainly to obtain the calculation formulas of the lift coefficient and drag coefficient of the aircraft through the dynamic equations of the constant speed climb motion and the constant speed level flight motion of the aircraft, and use the constant speed climb and constant speed level flight To solve the flight test data, it is necessary to arrange the flight test subject of the polar curve of the aircraft separately, which increases the cost of the test flight

Method used

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  • A data processing method for aircraft polar curve test flight
  • A data processing method for aircraft polar curve test flight
  • A data processing method for aircraft polar curve test flight

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Embodiment 1

[0038] A method for processing aircraft polar curve flight test data, mainly comprising the following steps:

[0039] (1) Without considering the side slip, the dynamic equation of the constant speed climbing motion of the aircraft with a slope is as follows:

[0040]

[0041] Among them, m aircraft mass, P available thrust, L lift, D drag, α angle of attack, γ roll angle, θ track inclination, Engine installation angle, g is gravity acceleration.

[0042] (2) Relatively speaking, the engine installation angle and the angle of attack α are generally small, and it is approximately regarded as 0, then α≈0.

[0043] (3) On the basis of 2), the dynamic equation of climbing with a slope in (1) is as follows:

[0044]

[0045] (4) The formula for calculating the lift L of the aircraft is as follows:

[0046] L=qSC L

[0047] Among them, q is the dynamic pressure, S is the wing reference area, C L is the lift coefficient.

[0048] (5) The formula for calculating the ...

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Abstract

The invention discloses a method for processing aircraft polar curve test flight data. The invention does not consider sideslip, and ignores engine installation angle and attack angle α. The invention processes the plane polar curve data through normal overload and longitudinal overload. The invention does not need to separately arrange aircraft polar curve flight test subjects, reduces the cost of test flight, reduces the parameter amount of aircraft polar curve test flight data processing in the prior art, reduces aircraft flight test subjects, and has better practicability.

Description

technical field [0001] The invention belongs to the technical field of aircraft flight test data processing, and in particular relates to a method for processing aircraft polar curve flight test data. Background technique [0002] Aircraft performance test flight involves take-off and landing, climb, ceiling, flight time, altitude-speed characteristics and maneuverability, etc., which is an important test content. Among them, flight test data processing is an important part of performance test flight. Through the processing of flight test data, the flight test results can be obtained, which can be used as the basis for aircraft certification. At the same time, the polar curve of the aircraft obtained through the flight test data can be used to verify and correct the results of the wind tunnel test, and the corrected polar curve can be used for calculation. Climb gradient, cruise performance and other data. [0003] At present, the flight test data processing for the polar ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F119/14
CPCG06F30/15G06F2119/14
Inventor 刘志林苗文中杨海庆曹放华郑权刘永兵
Owner CHENGDU AIRCRAFT INDUSTRY GROUP