1204 3次元可変形状トラスの連続体モデルに基づく可変幾何特性を用いた自己同定(J01-1 逆問題解析手法の開発と最新応用(1),J01 逆問題解析手法の開発と最新応用)  [in Japanese] 1204 Self-identification Using Variable Geometric Properties Based on Continuum Models of a Three-dimensional Variable Geometry Truss  [in Japanese]

This study presents experimental results of parameter identification of a conceptual variable geometry truss model, which consists of nine variable length members for changing geometry of truss structure. All the variable members are changed uniformly so that the total length of the truss is changed, and the first natural frequency is changed accordingly. The change of the natural frequency due to geometry changes indicate that the structural parameters can be identified using the relation between the length of the variable members and natural frequency of the truss, thus the system has an capability of self-identification. Basic experiments are conducted using the variable geometry truss to investigate the feasibility of the present method, and the results show that unknown structural parameters such as additional mass attached at the end module of the truss can be identified by using the first natural frequencies corresponding to some different geometries.