imported>Tschachim: New image

2007-06-06T18:58:15Z

New image

← Older revision		Revision as of 18:58, 6 June 2007
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	[[Image:IMU.~~gif~~\|thumb\|right\|Inertial Measurement Unit]]		[[Image:IMU.jpg\|thumb\|right\|Inertial Measurement Unit]]

	The '''[[w:Inertial Measurement Unit\|Inertial Measurement Unit (IMU)]]''' was gimbaled on three axes. The innermost '''stable member''', a 6 [[w:inch\|inch]] beryllium cube, had three [[w:gyroscope\|gyroscope]]s and three [[w:accelerometer\|accelerometer]]s mounted in it. Feedback loops including the resolvers used signals from the gyroscopes to control motors at each axis. This [[w:servo\|servo]] system kept the stable member fixed with respect to Inertial Space . The IMU was derived from the guidance system developed by Draper for the [[w:Polaris missile\|Polaris missile]].		The '''[[w:Inertial Measurement Unit\|Inertial Measurement Unit (IMU)]]''' was gimbaled on three axes. The innermost '''stable member''', a 6 [[w:inch\|inch]] beryllium cube, had three [[w:gyroscope\|gyroscope]]s and three [[w:accelerometer\|accelerometer]]s mounted in it. Feedback loops including the resolvers used signals from the gyroscopes to control motors at each axis. This [[w:servo\|servo]] system kept the stable member fixed with respect to Inertial Space . The IMU was derived from the guidance system developed by Draper for the [[w:Polaris missile\|Polaris missile]].

imported>Tschachim at 20:11, 4 February 2007

2007-02-04T20:11:18Z

New page

[[Image:IMU.gif|thumb|right|Inertial Measurement Unit]]

The '''[[w:Inertial Measurement Unit|Inertial Measurement Unit (IMU)]]''' was gimbaled on three axes. The innermost '''stable member''', a 6 [[w:inch|inch]] beryllium cube, had three [[w:gyroscope|gyroscope]]s and three [[w:accelerometer|accelerometer]]s mounted in it. Feedback loops including the resolvers used signals from the gyroscopes to control motors at each axis. This [[w:servo|servo]] system kept the stable member fixed with respect to Inertial Space . The IMU was derived from the guidance system developed by Draper for the [[w:Polaris missile|Polaris missile]].

Inertial guidance systems are not perfect and Apollo system drifted about one [[w:radian|milliradian]] per hour. Thus it was necessary to ‘‘realign’’ the inertial platform periodically by sighting on stars.

[[Category:Guidance and Control System]]

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Inertial Measurement Unit - Revision history

imported>Tschachim: New image

imported>Tschachim at 20:11, 4 February 2007