Abstract
This paper describes a method for estimating dynamic characteristics of a large space structure, such as a solar paddle. There is a problem in performing modal tests when the structure increases in size. In such a case, gravitational considerations may prevent a fully assembled ground modal test because the structure is not strong enough to withstand the force of gravity. Component modal test is one of methods to solve this problem. In component modal test, a tested component is selected, and the effect of untested component is considered as additional masses and stiffnesses. After the completion of a modal test, different tested components are subjected to modal tests. We consider identical frequencies obtained by component modal tests as frequencies of the structure. When using two additional masses and stiffnesses, this paper clarifies the effect of the order to select mass (stiffness) additive locations on predicting the dynamic characteristics of the structure.
