Abstract
The force acting on a machine or a structure must be identified when they are designed or in case of condition monitoring and diagnosis. One of the force identification methods is based on the equation of motion, in which the responses of all degrees of freedom are estimated from the measured response data using modal analysis technique. The method is very useful for rotor systems but there is a problem that the identified force is distributed over the structure in case of unique structure. In this study, the identification method is improved, in which the accurate responses can be obtained under some constraints. The method is numerically and experimentally checked and it was shown that the method was useful for actual application.
