独立成分分析法を用いた車両振動の解析(<特集>D&D2009)

抄録

The paper introduces the new method to estimate vertical road roughness from accelerations and suspension strokes of the automobile using ICA (Independent Component Analysis), and examines the performance through the numerical simulation. The authors propose to apply ICA to monitor the automobiles. ICA only presumes the independency of source signals, so it is expected that ICA can identify the road roughness without specifications of a car. To simplify the discussion, only vertical and pitch motions are considered. The integral of strokes, velocities, and differential accelerations are calculated by integrating and differentiating the measured accelerations and suspensions strokes, respectively. They are treated as parts of the observed data sets as well as the accelerations. By using ICA, the similar shape to the input road is estimated.