Pitch stick force inhibit of aircraft automatic outer loop

US4387430A · kind A · utility

Assignee

• UNITED TECHNOLOGIES CORPORATION · US

Inventors

• David J. Verzella · Guilford, US
• William C. Fischer · Monroe, US
• Don L. Adams · Bartlesville, US
• Stuart C. Wright · Woodbridge, US

Key dates

• Filing date: Mar 30, 1981
• Grant date: Jun 7, 1983
• Expiry date: Mar 30, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D1/0061
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In an aircraft automatic flight control system, a flight path controlling, full authority outer loop actuator (37) operated in response to the integral (41) of commands thereto, is shutdown (111, 113-115) in response to the sensing (31, 32) of force on the related pilot control member (27). After removal of force (118), the outer loop is continued to be shut down for a time interval (119) to allow the aircraft to resettle toward the trim point before building up error in the integrator, unless high input demand (122) is indicated.