Patent ID: 11914763
Assignee: ROCKWELL COLLINS, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC B  G

Claim 7:
8. A method for conformal alignment of a headtracker for a head worn display (HWD) system, the method comprising:
defining, via a processor of the HWD system, one or more far-field features proximate to an aircraft, each far-field feature corresponding to a three-dimensional (3D) position relative to a navigational reference frame;
determining, via a positioning system of the aircraft, at least one feature pointing vector associated with each defined far-field feature, each feature pointing vector relative to a platform reference frame associated with the aircraft;
estimating a nominal head pose for aligning a display reference frame to the platform reference frame, the display reference frame associated with a display unit of the HWD system, the nominal head pose configured for positioning the one or more far-field features within a field of view (FOV) of the display unit;
rendering, via the display unit, the one or more far-field features based on the at least one feature pointing vector and the estimated nominal head pose;
aligning the one or more rendered far-field features to their corresponding 3D positions;
determining, via a processor of the HWD system, a latched headtracker pose associated with an optical-inertial headtracker of the HWD system, the latched headtracker pose corresponding to a successful alignment of the one or more rendered far-field features to their corresponding 3D positions;
determining, via the processor, an updated headtracker alignment associated with the optical-inertial headtracker, the updated headtracker alignment based on the nominal head pose, the latched headtracker pose, and an extrinsic calibration of the display unit relative to an optical reference frame of the headtracker;
and
updating, via the processor, a display alignment for aligning the at least one feature pointing vector to the display reference frame based on the updated headtracker alignment.