Automatic longitudinal pitch trim in aircraft combat simulation

Details Automatic longitudinal pitch trim in aircraft combat simulation Automatic longitudinal pitch trim in aircraft combat simulation

2007-10-23

2007-10-23

Pezzuto, Robert E. (Department: 3714)

Education and demonstration

Vehicle operator instruction or testing

Flight vehicle

C434S028000, C434S037000, C434S051000, C434S059000

Reexamination Certificate

active

10410704

ABSTRACT:
An AutoTrim function automatically adjusts the trim of the elevator of a simulated aircraft to compensate for pitching moments that are not caused by a user affirmatively controlling the elevator. A flight simulator program determines a sum of the pitching moments acting on the simulated aircraft, excluding the user setting of the elevator. The sum of the longitudinal pitching moments is then set equal to zero to solve for a desired position for setting the AutoTrim control. A time lag is applied in setting the AutoTrim control to the desired position, to provide greater realism. Use of the AutoTrim control provides enhanced control authority to the user in controlling the longitudinal pitch of the aircraft. The AutoTrim control functionality is stopped as the angle of attack of the aircraft approaches a stall condition, but resumes when the plane is flying in a substantially safer flight condition.

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patent: 4463605 (1984-08-01), McDowell et al.
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patent: 4646255 (1987-02-01), Ebert et al.
patent: 5571953 (1996-11-01), Wu
patent: 6236914 (2001-05-01), Kaloust
patent: 6763325 (2004-07-01), Stone

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