Aircraft APU air inlet channel sound source simulation device and simulation method

A simulation device and simulation method technology, applied in electrical components, sound-generating equipment, geometric CAD, etc., can solve problems such as long test time, high efficiency requirements of feedback algorithm, and convergence cannot be guaranteed, and achieve the effect of wide application range

Pending Publication Date: 2022-07-29
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is that this feedback mechanism takes a certain amount of time, especially for an array composed of multiple speakers, which has extremely high requirements for the efficiency of the feedback algorithm, and there is no guarantee that it will converge
In the test of a large number of working conditions, it takes a long test time to complete the test

Method used

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  • Aircraft APU air inlet channel sound source simulation device and simulation method
  • Aircraft APU air inlet channel sound source simulation device and simulation method
  • Aircraft APU air inlet channel sound source simulation device and simulation method

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Embodiment Construction

[0077] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

[0078] The terms "first", "second", etc. in the description and claims of the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein can, for example, be practiced in s...

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Abstract

The invention discloses an aircraft APU air inlet channel sound source simulation device and simulation method, and belongs to the technical field of aircraft noise testing. The aircraft APU air inlet channel sound source simulation device comprises a loudspeaker, a waveguide tube, a fixed connection assembly, a measurement microphone and an electrical and signal control assembly, wherein the measurement microphone and the waveguide tube are fixed on the fixed connection assembly; the loudspeaker is fixed on the waveguide tube; one end of the electrical and signal control assembly is connected to the measuring microphone, and the other end of the electrical and signal control assembly is connected to the loudspeaker; the aircraft APU air inlet channel sound source simulation method comprises a sound mode sound source simulation method and a broadband noise / single-frequency noise simulation method. The method aims at an acoustic mode generation device and a control method part in a rectangular pipeline of the APU air inlet channel, and an equation set formed by response functions of the acoustic mode generation device and the control method part has great innovation.

Description

technical field [0001] The invention belongs to the technical field of aircraft noise testing, relates to a sound source device used in the research and development test of an aircraft APU air inlet sound lining and is required in a laboratory test stage, and more particularly relates to an aircraft APU air intake Channel sound source simulation device and simulation method. Background technique [0002] The aircraft's APU (auxiliary power unit) comes into operation when passengers are picked up and dropped off at the airport and is a major source of tarmac noise. Similar to an aircraft's engine, acoustic linings can be installed in its air intakes to reduce noise. The intake duct noise of the APU propagates outward in the form of duct sound modes. In the research and development test of the APU air inlet acoustic lining, a sound source device is required to generate the acoustic mode of the APU. Different from the air inlet of the aircraft nacelle, the APU air inlet duct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20G06F17/12G10K11/162H04R3/00H04R9/06
CPCG06F30/15G06F30/20G06F17/12H04R9/06H04R3/00G10K11/162
Inventor 张涛张颖哲林大楷张伟光
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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