Title:
ACTIVE HELICOPTER NOISE SUPPRESSION APPARATUS INTEGRATING ACOUSTIC ARRAY AND IN-BLADE CONTROL
Document Type and Number:
WIPO Patent Application WO/2023/103168
Kind Code:
A1
Abstract:
An active helicopter noise suppression apparatus integrating an acoustic array and in-blade control. The apparatus comprises an annular loudspeaker array (101), a plurality of force exciters (102), an error microphone (103), an active noise cancellation (ANC) controller (104), a cockpit sensor (105) and an onboard computer (106). By means of providing the annular loudspeaker array (101) on a rotor blade hub and arranging the unsteady force exciters (102) on the rear edges of blades, a sound field, the sound waves in which are in an inverted phase with respect to an original sound field, is constructed by using the ANC control principle, such that noise is canceled, thereby achieving noise cancellation of universal helicopter noises of all types.
Inventors:
SHI YONGJIE (CN)
MA TAIHANG (CN)
HU ZHIYUAN (CN)
XU GUOHUA (CN)
LIU YANG (CN)
MA TAIHANG (CN)
HU ZHIYUAN (CN)
XU GUOHUA (CN)
LIU YANG (CN)
Application Number:
PCT/CN2022/073718
Publication Date:
June 15, 2023
Filing Date:
January 25, 2022
Export Citation:
Assignee:
UNIV NANJING AERONAUTICS & ASTRONAUTICS (CN)
International Classes:
G06F30/15; G06F30/28; G10K11/178; G06F119/10
Foreign References:
| CN107230472A | 2017-10-03 | |||
| CN107220412A | 2017-09-29 | |||
| CN112487730A | 2021-03-12 | |||
| CN113421537A | 2021-09-21 | |||
| CN108216617A | 2018-06-29 | |||
| CN113257214A | 2021-08-13 | |||
| CN108382606A | 2018-08-10 | |||
| US20180366007A1 | 2018-12-20 | |||
| US20190088244A1 | 2019-03-21 | |||
| JPH07160273A | 1995-06-23 |
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
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