Noise qualification approval equivalent test flight method of large transport-category aircraft

Abstract

The invention belongs to the aircraft test flight technology, and particularly relates to a noise qualification approval equivalent test flight method of a large transport-category aircraft. The noise qualification approval equivalent test flight method of the large transport-category aircraft includes the steps of symmetrically setting three noise measurement points in the direction perpendicular to the center extension line of an airport ground track, carrying out an airworthiness noise flight test with a flight path plunge method, after the aircraft takes off, entering flight path plunge points to set the engine power, the flight height and the flight speed, carrying out the flight test according to a reference flight path, measuring noise when the aircraft reaches the preset height above the noise measurement points, going around to pull up the aircraft after noise measurement is completed, and repeatedly carrying out a next flight test, wherein in the whole test process, the aircraft keeps flying all the time. According to the noise qualification approval equivalent test flight method, the noise measurement points are greatly reduced, required noise test devices and required test persons are greatly reduced, cost is reduced, the test flight efficiency is improved, the test flight cycle is greatly shortened, the service life of an engine is prolonged, a test site is flexibly selected, and flight tasks of aircrafts in other types in the site can not be influenced.

Description

Technical field: [0001] The invention belongs to aircraft flight test technology, in particular to an equivalent flight test method for noise qualification certification of large transport aircraft. Background technique: [0002] The noise certification test flight of large transport aircraft has not yet been carried out in China. The original test method needs to arrange 12 noise measurement points near the airport. During the flyover and lateral noise measurement, the aircraft takes off at the maximum takeoff weight and maximum takeoff power each time. During the test and approach noise measurement, the aircraft must perform a landing test at the maximum landing weight. Moreover, this method needs to fly at the test airport itself, which will affect other flying characters at the airport. Twelve noise measurement points need to be arranged in the test, and each noise measurement point requires basic construction and testing instrument personnel, which wastes a lot of manp...

AI Technical Summary

Problems solved by technology

[0002] The noise certification test flight of large transport aircraft has not yet been carried out in China. The original test method needs to arrange 12 noise measurement points near the airport. During the flyover and lateral noise measurement, the aircraft takes off at the maximum takeoff weight and maximum takeoff power each time. During the test, the approach noise measurement, the aircraft must perform the landing test at the maximum landing weight

And this method needs to fly at the test airport itself, which will affect other flying characters at the airport

Twelve noise measurement points need to be arranged in the test, and each noise measurement point needs to be constructed and equipped with test instrument personnel, which wastes a lot of manpower and material resources

In the test, it is required that the aircraft must take off at the maximum take-off weight or land at the maximum landing weight, and conduct a noise measurement, which wastes a lot of flight sorties, and the flight test cycle is long

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