Aircraft roll-yaw fault protocols

US4484283A · 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
• Byron Graham, Jr. · Easton, US

Key dates

• Filing date: Mar 30, 1981
• Grant date: Nov 20, 1984
• 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, automatic shutdown (42) of the roll axis thereof (FIG. 1) as a consequence of faults detected therein also provides automatic shutdown of the yaw axis thereof (180) in the same fashion as detection of faults in the yaw axis (171, 167) provides shutdown of the yaw axis. Coupling of the roll axis shutdown into the yaw axis shutdown allows determining which of three axes cause lighting of a single trim shutdown indicator by resetting the yaw shutdown register (145) and simultaneously resetting both the pitch and roll shutdown registers by means of a single cyclic pitch control switch. Automatic yaw trim outer loop and yaw inner loop stability systems are disclosed (FIG. 2).