Title:
SYSTEM FOR DETECTING ANGLE OF ELEVATION AND ANGLE OF SIDESLIP
Document Type and Number:
Japanese Patent JP3671216
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To rapidly estimate an angle of elevation and an angle of sideslip with high accuracy even in case of the large angle of elevation in a system for detecting the angle of elevation and the angle of sideslip of an aircraft.
SOLUTION: The arrangement PA, PB of pressure holes formed of five holes are provided at a pitot boom tip 53a of the aircraft. Pressures P1-P5, P3', P4', P5' are respectively measured by pressure sensors 12a-12d, 13a-13d, converted into digital signals by A/D converters 14, 15 and inputted to a computer 16. In the computer 16, a matrix A is obtained from the vertical and lateral pressure difference of five holes for each of the arrangement PA, PB, and a coefficient matrix is obtained from the relation between the pressure difference and α, β previously obtained in a calibration test. The matrix A is multiplied with the coefficient matrix to easily obtain the angle of elevation and the angle of sideslip. Since the angle of elevation and the angle of sideslip are estimated from the arrangement PA of a center part when the angle of elevation is small, and from the arrangement PB when the angle of elevation is large, they can be rapidly estimated with high accuracy.
Inventors:
Yumiko Yamaguchi
Hisako Yasui
Hisako Yasui
Application Number:
JP2002034428A
Publication Date:
July 13, 2005
Filing Date:
February 12, 2002
Export Citation:
Assignee:
Director General, Technical Research Division, Defense Agency
International Classes:
G01B13/18; B64D43/02; G08G5/00; (IPC1-7): B64D43/02; G01B13/18; G08G5/00
Domestic Patent References:
| JP2001242190A | ||||
| JP5288761A | ||||
| JP10332728A | ||||
| JP2000275269A |
Attorney, Agent or Firm:
Takashi Murai