A development of sequential estimation method for position and shape of acoustic scatterers by the time-domain boundary element method

Abstract

This study proposes an inverse analysis method to estimate the position and shape of scatterers from profiles of sound pressure measured at prescribed observation points. We describe each scatterer with NURBS patches and manipulate their control points (CPs). Then, we cannot move each CP largely because the resulting CPs can cause self-intersections of the NURBS patches. To avoid the issue, we estimate the position and shape of each scatterer sequentially. Further, we perform a global search of the initial position of each scatterer at first. This can avoid the to fall in a local optimal solution.