John H Raab

US Patent:

6895321, May 17, 2005

Filed:

Jul 29, 2003

Appl. No.:

10/604529

Inventors:

Ray F. Campbell - Newport Beach CA, US
Joan D. Wada - Anaheim CA, US
John P. Raab - Placentia CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G01P015/125
G01C019/00

US Classification:

701 70, 701 1, 701220, 7350402, 7351401, 7351432, 324658

Abstract:

An accelerometer system includes a rigid plate system coupled to an inertial platform. A first flexure plate defines a first flex axis and is adjacent to the rigid plate system a first distance from the spin axis. The first flexure plate generates a first frequency signal in response to acceleration of the first flexure plate. A second flexure plate defines a second flex axis and is adjacent to the rigid plate system a second distance from the spin axis. The second flexure plate generates a second frequency signal in response to acceleration of the second flexure plate. A controller including receives the first frequency signal and the second frequency signal and generates an angular acceleration signal from a difference of the first frequency signal and the second frequency signal. The controller also generates a linear acceleration signal in response to an average of the first frequency signal and the second frequency signal. The controller also controls a missile system in response to the first frequency signal and the second frequency signal.

US Patent:

7310577, Dec 18, 2007

Filed:

Sep 29, 2004

Appl. No.:

10/953726

Inventors:

Ray F. Campbell - Newport Beach CA, US
Joan D. Wada - Anaheim CA, US
John P. Raab - Placentia CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

G06F 19/00
G01C 21/16

US Classification:

701220, 701 4, 701116, 701221, 702150, 702153, 73 178

Abstract:

An inertia control system includes an integrated inertial measurement unit coupled to an inertial platform. The integrated inertial measurement unit includes three accelerometer gimbals/axes (first, second, and third) respectively, each including a pair of flexure plate accelerometers. First and second accelerometers are coupled to the first gimbal, third and fourth accelerometers are coupled to the second gimbal, and fifth and sixth accelerometers are coupled to the third gimbal. The system further includes a processor utilizing outputs from the inertial measurement unit in three processor modes, including a leveling mode, a compass mode, and an operational mode.