The non-closed parts optimal fitting method based on curvature Hausdorff distance using 3D non-contact measurement points
The non-closed parts optimal fitting method based on curvature Hausdorff distance using 3D non-contact measurement points
- New search for: Wang, Hua
- New search for: Yu, Junyang
- New search for: Wang, Hua
- New search for: Yu, Junyang
The front appearance of a car is very important for the first impression of the customer. Auto-body panel fitting quality is an efficient way to improve dimensional quality and to give a better impression to the customer. A new non-closed parts fitting model based on curvature Hausdorff distance (CHD) has been developed to obtain the optimal fitting position. The correlation between CHD and fitting quality, that is, the validity of the minimal CHD corresponding to optimal fitting quality, has been verified by a practical demonstration of three curves fitting. A practical fitting case of the hood, headlight and fender of a car has been conducted and good fitting quality has been achieved. To get a good auto-body panel fitting quality, scanning point cloud data was employed. The B-spline curve fitting was employed to obtain fitting boundaries. The curvature calculation methods and the offset algorithm were developed according to the requirements of non-closed parts fitting. Finally, through the estimation of a part's fitting curve's curvature, the optimal fitting model of non-closed parts based on CHD was established. The constrained optimization model can not only satisfy the design requirements on gap and flushness, but also found the optimal solution easily. The results of this research will enhance the understanding of the optimal fitting of spatial curves, and help systematically adjust non-closed fitting parts.
Document information
The non-closed parts optimal fitting method based on curvature Hausdorff distance using 3D non-contact measurement points
2013
12 Seiten, 19 Bilder, 3 Tabellen, 16 Quellen
Article (Journal)
English
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