Multiple shaker excitation using coherent signals
Abstract
This paper describes a technique by which multiple shakers can be used to obtain transfer functions of a structure. This technique differs from those currently being used in that it requires that the input signals to the shakers be coherent with respect to each other rather than stochastically uncorrelated. The big advantage of using this technique is that a standard dual channel spectrum analyzer can be used to obtain the transfer functions rather than the more costly multi-channel ones. In addition, the same curve fitting algorithms that are used with dual channel data can still be used.
- Publication:
-
IN: International Modal Analysis Conference
- Pub Date:
- 1985
- Bibcode:
- 1985imac....1..117W
- Keywords:
-
- Electromagnetism;
- Mechanical Oscillators;
- Shakers;
- Spectrum Analysis;
- Structural Vibration;
- Transfer Functions;
- Excitation;
- Fourier Transformation;
- Matrices (Mathematics);
- Engineering (General)