Abstract
The inverse analysis procedure using the modal parameter of 1st vibration mode as observation data was proposed to put the damage detection technique to practical use. Number of components of the state and observation vector must be equal to make up sensitivity matrix as square matrix. Therefore, natural frequency and ratio for displacement of each stories based on 1st vibration mode shape were specifically. The projection filter which was the simplest form was used as inverse analysis method. In this paper, characteristics of the inverse analysis method proposed are made clear through some numerical calculation from viewpoints of change caused by iterative calculations of determinant and singular value for the sensitivity matrix.
