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Title:
ROTOR CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/1999/012809
Kind Code:
A1
Abstract:
A rotor control system which includes a blade (10) fitted to a main rotor shaft (1) in such a fashion that the pitch angle is variable, a flap (20) fitted to the rear edge side of the blade (10) in such a fashion that the pitch angle is variable, a first link mechanism for controlling the pitch angle of the blade (10) and a second link mechanism for controlling the pitch angle of the flap (20). The first link mechanism includes a swash plate (14) comprising a rotation portion (12) connected to the blade (10) by a link mechanism and a control portion (13) undergoing displacement in accordance with the operation quantity. The second link mechanism includes a swash plate (31) comprising a rotation portion (29) connected to the flap (20) by a link mechanism and a control portion (30) undergoing displacement by actuators (36a and 26b), and a harmonic controller (37). According to this construction, a flap driving mechanism capable of exploiting effectively the flap performance can be accomplished, and the noise and vibration of a helicopter can be reduced.

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Inventors:
YAMAKAWA EIICHI (JP)
KAWAKAMI KOUJI (JP)
GOI TATSUHIKO (JP)
Application Number:
PCT/JP1997/003183
Publication Date:
March 18, 1999
Filing Date:
September 10, 1997
Export Citation:
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Assignee:
INST ADV TECH HELICOPTER LTD (JP)
YAMAKAWA EIICHI (JP)
KAWAKAMI KOUJI (JP)
GOI TATSUHIKO (JP)
International Classes:
B64C27/00; B64C27/605; B64C27/615; (IPC1-7): B64C27/615
Foreign References:
JPH09240594A1997-09-16
US3589831A1971-06-29
US4461611A1984-07-24
JPH06270894A1994-09-27
JPH08230794A1996-09-10
JPH072187A1995-01-06
US5409183A1995-04-25
JPS3816376B1
US3077934A1963-02-19
JPS4748152B1
US3521971A1970-07-28
JPH06107293A1994-04-19
JPH08258795A1996-10-08
JPH06107293A1994-04-19
US3077934A1963-02-19
US3129769A1964-04-21
US3589831A1971-06-29
US4461611A1984-07-24
Other References:
See also references of EP 0936140A4
Attorney, Agent or Firm:
Saikyo, Keiichiro (2-6 Bingomachi 3-chome, Chuo-k, Osaka-shi Osaka 541, JP)
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