Application of Roll-Isolated Inertial Measurement Units to the Instrumentation of Spinning Vehicles

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Description

Roll-isolated inertial measurement units are developed at Sandia for use in the instrumentation, guidance, and control of rapidly spinning vehicles. Roll-isolation is accomplished by supporting the inertial instrument cluster (gyros and accelerometers) on a single gimbal, the axis of which is parallel to the vehicle's spin axis. A rotary motor on the gimbal is driven by a servo loop to null the roll gyro output, thus inertially stabilizing the gimbal and instrument cluster while the vehicle spins around it. Roll-isolation prevents saturation of the roll gyro by the high vehicle spin rate, and vastly reduces measurement errors arising from gyro ... continued below

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33 p.

Creation Information

BEADER,MARK E. December 1, 2000.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Roll-isolated inertial measurement units are developed at Sandia for use in the instrumentation, guidance, and control of rapidly spinning vehicles. Roll-isolation is accomplished by supporting the inertial instrument cluster (gyros and accelerometers) on a single gimbal, the axis of which is parallel to the vehicle's spin axis. A rotary motor on the gimbal is driven by a servo loop to null the roll gyro output, thus inertially stabilizing the gimbal and instrument cluster while the vehicle spins around it. Roll-isolation prevents saturation of the roll gyro by the high vehicle spin rate, and vastly reduces measurement errors arising from gyro scale factor and alignment uncertainties. Nine versions of Sandia-developed roll-isolated inertial measurement units have been flown on a total of 27 flight tests since 1972.

Physical Description

33 p.

Notes

OSTI as DE00772048

Medium: P; Size: 33 pages

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  • Other Information: PBD: 1 Dec 2000

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  • Report No.: SAND2000-3070
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/772048 | External Link
  • Office of Scientific & Technical Information Report Number: 772048
  • Archival Resource Key: ark:/67531/metadc717642

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  • December 1, 2000

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 12, 2017, 1:29 p.m.

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BEADER,MARK E. Application of Roll-Isolated Inertial Measurement Units to the Instrumentation of Spinning Vehicles, report, December 1, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc717642/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.