Random vibration testing of a single test item with a multiple input control system
This paper develops an algorithm for a multiple shaker random vibration control system. The system is designed for several shakers driving a single test item with full cross-coupling control. The method allows for cross-coupled mechanical systems with partially coherent control points. This report extends a previous paper in the following respects. The algorithm corrects both the auto spectra and the cross spectra of the control points in closed loop. Multiple-shaker control systems require the inversion of the system frequency response function matrix. When this matrix is singular or near singular, large errors can result. Under these conditions, procedures are developed for calculating a pseudo inverse. This paper also includes a discussion of the time randomization procedure used to provide a true random output.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5187352
- Report Number(s):
- SAND-81-2011C; CONF-820411-1; ON: DE82005687
- Resource Relation:
- Conference: Institute of Environmental Sciences conference, Atlanta, GA, USA, 20 Apr 1982
- Country of Publication:
- United States
- Language:
- English
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