Patent · US Active

Flight control laws for automatic hover hold

US9162752B2 · kind B2 · utility

3Cited by

10References

20Claims

0Family size

Assignee

Bell Helicopter Textron Inc. · US

Inventors

Kevin Thomas Christensen · Plano, US
Shyhpyng Jack Shue · Grapevine, US
Troy Sheldon Caudill · Burleson, US

Key dates

Filing date	Jul 15, 2011
Grant date	Oct 20, 2015
Priority date	—
Expiry date	Jun 2, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG05D1/102
WIPO fieldControl
WIPO sectorInstruments

Abstract

A system and method to control hovering flight of a rotary aircraft. The system including a lateral speed hold loop, a longitudinal loop, a vertical control loop, and a directional loop. The method includes defining a first flight envelope having a first groundspeed threshold; defining a second flight envelope having a second groundspeed threshold, the second flight envelope being defined within the first envelope; engaging a hover hold with a control law hover hold architecture as the aircraft enters the first flight envelope; and engaging a position hold with a control law position hold architecture as the aircraft enters the second flight envelope.

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