Multi-point transient modal testing

Recent advances in modal testing have made possible the measurement of frequency response functions using multiple uncorrelated random signals. This paper extends these concepts to multiple input transient testing. To allow the use of deterministic inputs, the theory of multiple input testing is first expanded and the conditions for the existence of a solution are examined. It is then shown that the addition of random delays to the inputs will satisfy the conditions for a solution. Finally, the technique is evaluated in two experiments.