The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2015
Filed:
Jul. 15, 2011
Kevin Thomas Christensen, Plano, TX (US);
Shyhpyng Jack Shue, Grapevine, TX (US);
Troy Sheldon Caudill, Burleson, TX (US);
Kevin Thomas Christensen, Plano, TX (US);
Shyhpyng Jack Shue, Grapevine, TX (US);
Troy Sheldon Caudill, Burleson, TX (US);
Bell Helicopter Textron Inc., Fort Worth, TX (US);
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.