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 frequency response function. The method is very useful although it requires the information of location of force acting. In this study, the identification method is improved such as to apply the case with no information of location of force. The method is numerically checked and it was shown that the method was useful in the case with and without noise in the measured data. Moreover it is checked by experiment.
