624 時間-空間周波数が相互に関連する非定常振動データのリアルタイム処理法

抄録

The tendency by which the budget assigned to construction of an infrastructure is reduced continues in our country in recent years, and it increases in the importance of the maintenance for life prolongation of existence structures. It is also increasing in the importance of the roadability of a vehicle and something such as maintenances for comfort securement in conformity with the user's needs as well as maintenances for safety on the freeway. The smoothness of the pavement surface is concerned with the comfort which is at the time of a vehicle run on the freeway, and IRI(International Roughness index) is set as the index to estimate from the viewpoint of the ride quality of the vehicle which runs a road surface. Authors have developed the IRI instrumentation system in which algorithm by sequential processing methods on the time axis was included. In this paper describes real time processing methods for non-stationary vibration which has mutual conversion between time and spatial frequency, to estimate the special quality about the running through road surface profile in a run road surface from vibrational data of an included run vehicle there.