Flight Test Method for Aircraft Engine Characteristic Identification and Balance Pole Curve Identification

Abstract

The invention relates to the field of aviation technology, in particular to a flight test method for aircraft engine characteristic identification and balance pole curve identification, comprising the following steps: according to different flight test methods, by solving the adjustment coefficient b of the thrust, the drag factor A of the lift, and the fuel consumption rate C. Total temperature ratio correction factor TT T And total pressure, total temperature correction factor PT T , solve the engine characteristics at the target altitude, and then solve the drag coefficient CD, lift coefficient CL and shape drag CD 0 , through linear fitting, the aircraft balance pole curve at the altitude and speed is obtained, and by changing the speed or altitude, the aircraft balance pole curve in the range of altitude-speed full envelope is finally obtained. Through this method, the indirect and poor accuracy of aircraft engine characteristic identification in the prior art can effectively solve the data deviation and error, which ultimately affects the limitation and incompleteness of aircraft balance polar curve identification, and can solve the problem of The risk of adding sensors to the engine.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a flight test method for aircraft engine characteristic identification and balance pole curve identification. Background technique [0002] Aircraft test flight is an important link in the aircraft design process, accounting for one-third of the new aircraft development cycle. At the same time, the test flight is a risky process, facing various difficulties and problems in actual flight, and the risks come from many aspects. Among them, the accuracy of the engine data is very important, it is the data basis of the aircraft scheme design stage, and it is more directly related to the flight safety of the subsequent flight test. The identification of the balance pole curve of the aircraft is also an important research content in the process of aircraft type test flight, which is directly related to the correction of aircraft wind tunnel test data in the design stage, as well as t...

AI Technical Summary

Problems solved by technology

[0016] In order to solve the above-mentioned technical problems, the present invention proposes a flight test method for aircraft engine characteristic identification and balance pole curve identification, which can effectively solve the deviation and error of data caused by the indirect and poor accuracy of aircraft engine characteristic identification in the prior art, and finally Affects the limitations and incompleteness of the identification of the balance pole curve of the aircraft, and can solve the risk of adding sensors to the engine

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