Helicopter integrated fire and flight control having azimuth and

Details Helicopter integrated fire and flight control having azimuth and Helicopter integrated fire and flight control having azimuth and

1992-05-19

1994-07-26

Johnson, Stephen M.

Ordnance

Mounts

Training mechanisms

89 4106, 364423, F41G 322

Patent

active

053318811

ABSTRACT:
A fire control system (55) azimuth command and elevation command provides a flight control system attitude reference in response to operation of the flight control system in a coupled aiming mode. The coupled aiming mode is engaged in response to the continuous operation of a pilot switch (920) the azimuth command and elevation command being below respective threshold magnitudes (940, 941), and the operation of the fire control system (55). During operation in the coupled aiming mode, the azimuth command and elevation command replace the yaw attitude feedback error signal and pitch attitude error signal, respectively, as the aircraft attitude reference. During integration of the fire control system and the flight control system, the flight control system is made less sensitive to small pilot command stick inputs below a stick input threshold magnitude, so that small or inadvertent pilot commanded yaw and pitch maneuvers will not affect the yaw and pitch attitude reference commanded by the fire control system azimuth and elevation commands. However, intended pilot commanded yaw and pitch maneuvers (70) maintain full authority at all times.

REFERENCES:
patent: 2979289 (1961-04-01), Abzug
patent: 4012989 (1977-03-01), Hunt et al.
patent: 5001646 (1991-03-01), Caldwell et al.
McDonnell Douglas Helicopter Company, Integrated Air-to-Air Weapon (INTAAW) Evaluation System Definition Report, Final Issue, 23 Jan. 90, pp. 6-1 to 6-31.
"A Simulator Investigation of Parameters Affecting Helicopter Handling Qualitites in Air Combat (HAC II)", pp. 1-18, by Michael S. Lewis and M. Hossein Mansur, Aerospace Engineers, Ames Research Center; and Robert T. M. Chen, NASA Ames Research Center.
IFEE AES Systems Magazine, Jan. 1992, "Integrated Flight/Fire Control for Attack Helicopters", pp. 17-23, by Stephen Osder of McDonnell Douglas Helicopter Company.
Chief Engineer, vol. 6, No. 4, Jul.-Aug. 1983, "Design and Analysis of a Digitally Controlled Integrated Flight/Fire Control System", pp. 251-257, by John H. Blakelock, Applications Research Corporation.

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