Patent · US Expired

Desensitizing helicopter control response to inadvertent pilot inputs

US4279391A · kind A · utility

18Cited by

7References

2Claims

0Family size

Assignee

UNITED TECHNOLOGIES CORPORATION · US

Inventors

Don L. Adams · Bartlesville, US
Richard D. Murphy · Silver Spring, US
William C. Fischer · Monroe, US

Key dates

Filing date	Jan 24, 1979
Grant date	Jul 21, 1981
Priority date	—
Expiry date	Jan 24, 1999

Classification

Technology area (CPC G)Physics
CPC primaryG05D1/0061
WIPO fieldControl
WIPO sectorInstruments

Abstract

A helicopter having an automatic flight control system including an inner, stability loop is rendered less sensitive to short-term, inadvertent pilot inputs by applying a washed-out derivative of a stick position signal to the inner stability loop in a sense to countermand the pilot action. Using a washed-out signal countermands only short-term rapid stick motions, which may be induced by the pilot actively, but inadvertently, or inactively due to coupling between the pilot or the stick and motion of the fuselage, while permitting purposeful, long-term stick positions to have the full, intended effect.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.