Aaron D Kahn

US Patent:

8560234, Oct 15, 2013

Filed:

Apr 30, 2009

Appl. No.:

12/432897

Inventors:

Aaron D. Kahn - Arlington VA, US

Assignee:

The United States of America, as represented by the Secretary of the Navy - Washington DC

International Classification:

G01C 21/00
G01C 21/10
G01S 1/00
G01S 5/02

US Classification:

701480, 701468, 701470, 701479, 701500, 701509, 701510, 701534, 701535, 701536

Abstract:

Embodiments include systems and methods of navigation. In on embodiment, a plurality of position and motion states of a vehicle are estimated. The states may be estimated based on information received from a satellite receiver and an inertial measurement sensor. Estimating the states comprises performing one or more of a plurality of update steps at the rate that information is received from the satellite receiver. The states are estimated at a rate greater than the rate at which the update steps are performed. In one embodiment, the states are estimated using a stepped extended Kalman filter.

US Patent:

20070027688, Feb 1, 2007

Filed:

Jul 31, 2006

Appl. No.:

11/461124

Inventors:

Aaron Kahn - Arlington VA, US

International Classification:

G10L 15/04

US Classification:

704251000

Abstract:

Apparatus includes a reference model unit operable to generating a reference model state signal and a reference model state acceleration signal, the reference model state signal being based, at least in part, on a command control signal. The apparatus includes a reference model limiter including a minimum reference model acceleration value and a maximum reference model acceleration value, and bounding the reference model state acceleration signal by the minimum reference model acceleration value and the maximum reference model acceleration value. Optionally, the apparatus further includes a pseudo-control hedge unit including the reference model limiter and outputting a hedge signal to the reference model unit.

US Patent:

20080125880, May 29, 2008

Filed:

Sep 25, 2006

Appl. No.:

11/534739

Inventors:

Aaron D. Kahn - Arlington VA, US

International Classification:

G05B 13/04

US Classification:

700 30

Abstract:

Apparatus includes a reference model unit operable to generating a reference model state signal and a reference model state acceleration signal, the reference model state signal being based, at least in part, on a command control signal. The apparatus includes a reference model limiter including a minimum reference model acceleration value and a maximum reference model acceleration value, and bounding the reference model state acceleration signal be the minimum reference model acceleration value and the maximum reference model acceleration value. Optionally, the apparatus further includes a pseudo-control hedge unit including the reference model limiter and outputting a hedge signal to the reference model unit.

US Patent:

20090299494, Dec 3, 2009

Filed:

Apr 30, 2009

Appl. No.:

12/432809

Inventors:

Aaron D. Kahn - Arlington VA, US

International Classification:

G05B 13/02
G06F 17/18

US Classification:

700 28, 702179

Abstract:

Embodiments include systems and methods of estimating at least one state of a modeled dynamic system. In particular, in one embodiment, an observer such as an extended Kalman filter is used to estimate the state of a modeled dynamic system. A covariance matrix associated with state variables of the observer is periodically checked for compliance with a specified condition, e.g., positive definiteness. If the matrix deviates from the specified condition, the matrix is set to a specified value.

US Patent:

20190129449, May 2, 2019

Filed:

Nov 1, 2018

Appl. No.:

16/178296

Inventors:

- Arlington VA, US
Aaron David Kahn - Alexandria VA, US

International Classification:

G05D 1/10
G05D 1/00
G08G 5/00
G06F 17/16
B64D 43/02
B64C 39/02

Abstract:

A technique for finding and estimating the locations of atmospheric thermals for the purpose of exploiting the updraft energy to enable the aircraft to remain aloft while reducing or eliminating the need to expend fuel or energy and operational regardless of whether the aircraft is under powered flight or is gliding.