Vibration evaluation of a precision inertial reference unit

Joseph Friel; Brian Spanbauer; Paul Merritt; Reese Sturdevant; Robert Bradford; Nicole Tekell; Richard Walter; Jed Donaldson

doi:10.1117/12.722043

7 May 2007 Vibration evaluation of a precision inertial reference unit

Joseph Friel, Brian Spanbauer, Paul Merritt, Reese Sturdevant, Robert Bradford, Nicole Tekell, Richard Walter, Jed Donaldson

Author Affiliations +

Proceedings Volume 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI; 65690U (2007) https://doi.org/10.1117/12.722043
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

Inertial Reference Units (IRUs) are the basic reference for a precision pointing system. These units must provide an inertially stable light source to be used as the reference to align the outgoing laser beam and to reject beam train jitter due to vibrations. The IRU will be subjected to 6 degrees of freedom motion during operation. The correct operation of an IRU requires it to measure the angular motion and not be affected by the linear input vibration. Testing of these units is difficult, since the vibration input motion may be perfectly correlated between the angular inputs and the linear inputs. This correlation makes it impossible to separate the angular and linear IRU responses during a test, even with perfect measurements of the input vibrations. The solution to this problem is to obtain a vibration test station that can provide linear motion without any angular motion, and angular motion without linear motion. This paper will describe the evaluation of the test tables and show test data from an IRU that indicates how these tests can be beneficial in identifying performance problems.

Citation Download Citation

Joseph Friel, Brian Spanbauer, Paul Merritt, Reese Sturdevant, Robert Bradford, Nicole Tekell, Richard Walter, and Jed Donaldson "Vibration evaluation of a precision inertial reference unit", Proc. SPIE 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI, 65690U (7 May 2007); https://doi.org/10.1117/12.722043

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