US 10,890,463 B2
Takeoff pitch guidance system and method
Luc Tremblay, L'ile Bizard (CA); Marc-Antoine Delarche, Seattle, WA (US); and Jean-François Chretien, Laval (CA)
Assigned to AIRBUS CANADA LIMITED PARTNERSHIP, Mirabel (CA)
Filed by C SERIES AIRCRAFT LIMITED PARTNERSHIP, Mirabel (CA)
Filed on Jun. 27, 2018, as Appl. No. 16/19,837.
Claims priority of provisional application 62/525,876, filed on Jun. 28, 2017.
Prior Publication US 2019/0003853 A1, Jan. 3, 2019
Int. Cl. G01C 23/00 (2006.01); B64D 43/00 (2006.01); G05D 1/08 (2006.01); G08G 5/00 (2006.01)
CPC G01C 23/005 (2013.01) [B64D 43/00 (2013.01); G05D 1/0808 (2013.01); G05D 1/0816 (2013.01); G08G 5/0021 (2013.01); G08G 5/0065 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for providing takeoff pitch guidance for an aircraft, the method comprising:
providing takeoff pitch guidance for the aircraft in a pitch target mode at a time of takeoff, the pitch target mode corresponding to determining a target pitch as a function of aircraft operating parameters;
detecting a transition event while in the pitch target mode, wherein the transition event corresponds to when a weight-off-wheels condition of the aircraft is met,
transitioning the takeoff pitch guidance for the aircraft from the pitch target mode to an airspeed error mode after the transition event is detected and after a time delay that starts when the weight-off-wheels condition is met, the airspeed error mode corresponding to determining the target pitch based on a difference between an actual speed and a target speed of the aircraft; and
providing the takeoff pitch guidance in the airspeed error mode,
wherein the method further comprises providing a minimum pitch limit and a maximum pitch limit when in the airspeed error mode.