Michael R Mercier

US Patent:

D679320, Apr 2, 2013

Filed:

Apr 12, 2012

Appl. No.:

29/418157

Inventors:

Roy Whitson - Franklin NH, US
Jonathan Wesley Morris - Grand Prairie TX, US
Alan Kenneth Stratton - Milford NH, US
Michael William Mercier - Chicago IL, US

Assignee:

Fellowes, Inc. - Itasca IL

International Classification:

1804

US Classification:

D18 345

US Patent:

20210262801, Aug 26, 2021

Filed:

Apr 27, 2021

Appl. No.:

17/241833

Inventors:

- Nashua NH, US
Austin J. Dionne - Chester NH, US
Michael N. Mercier - Nashua NH, US

International Classification:

G01C 21/18
G01C 23/00
G01C 21/20

Abstract:

An alignment system for sensor or other electrical device filters rate data from gyroscopes and integrates the same to determine an alignment error state that is populated into a direction cosine matrix that pre-rotates measurement from a first electrical device into an estimated coordinate frame to determine a static alignment between first and second electrical devices or sensors. The system may be part of a countermeasure system on an aircraft. A first electrical device may be an inertial navigation system (INS), and a second electrical device may be an inertial measurement unit (IMU). The attitude of the IMU is used to translate the detected threats from the countermeasure system into a common reference frame of the INS.