Thomas A Frewen

US Patent:

20160216377, Jul 28, 2016

Filed:

Jun 30, 2015

Appl. No.:

14/755784

Inventors:

- Stratford CT, US
Thomas A. Frewen - West Hartford CT, US

International Classification:

G01S 17/93
G01C 21/20
G01S 7/481
G01S 17/02

Abstract:

A method of operating an obstacle data model construction system of an aircraft is provided. With a vehicle moving through a vehicle obstacle space from a first to a second position, the method includes scanning the vehicle obstacle space at the first and second positions, generating first and second boundary data sets from results of the scanning at the first and second positions, respectively, and deriving first and second shrouded regions from the first and second boundary data sets, respectively. The method further includes identifying a high confidence occupancy region from intersecting portions of the first and second shrouded regions or identifying an occupancy region from a union of the first and second shrouded regions.

US Patent:

20150356875, Dec 10, 2015

Filed:

Jun 2, 2015

Appl. No.:

14/728660

Inventors:

- Stratford CT, US
Thomas A. Frewen - West Hartford CT, US
Brendan J. Englot - New York NY, US

International Classification:

G08G 5/00

Abstract:

A method of route planning for a vehicle proceeding from a current location to a destination in a planning space is provided. The method includes generating a destination-rooted tree from global information that provides cost-to-go routing to the destination from multiple locations in the planning space, generating a vehicle-rooted tree using local information from the current location out to a sensing horizon and determining a local destination at the sensing horizon. The local destination corresponds to minimal cost-to-go routing obtained from the destination-rooted tree.