車両特性を考慮した独立成分分析による複数点の加速度計データを用いた路面形状推定

抄録

Road profile affects to the vehicle. Vehicle ride comfort and control stability are depending on it. So, the road profile information is available for a vehicle to improve them. The road profile estimation for each vehicle are required form this point. Accelerometer is one of a suitable device for a vehicle to measure its motion. Vehicle motion includes effects of road profile. They also includes another motion effects. Effects caused by road profile should be separated to estimate it. Toward to this problem, Independent Component Analysis (ICA) seems to be available. In this case, ICA can provide estimated road profile displacements from measured acceleration signals. However, estimated road profiles do not include displacement unit since this method is strongly depending on statistic theory. It means estimated signals from ICA should be modified based on mechanical point of view. So, estimated signal should be added mechanical meaning from other signal that are measured in same time. In this paper, the adding method is also introduced as a part in proposed method. Then, shaking table test was carried out to validate proposed methods. In this test, real vehicle was sat on it. The shaking table inputs displacement oscillation to vehicle each tire. And, accelerometer were set on vehicle body and chassis. The proposed methods have estimated shaking table input displacement from acceleration signal measured on a vehicle.