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Dimensional Analysis for the Front Chassis Module in the Auto Industry  

이동목 (경북대학교 대학원 기계공학과)
양승한 (경북대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.8, 2004 , pp. 50-56 More about this Journal
Abstract
The directional ability of an automobile has an influence on driver directly, and hence it must be given most priority. Alignment factors of automobile such as the camber, caster and toe directly affect the directional ability of a vehicle. The above mentioned factors are determined by the pose of interlinks in the assembly of an automobile front chassis module. Measuring the position of center point of ball joints in the front lower arm is very difficult. A method to determine this position is suggested in this paper. Pose estimation for front chassis module and dimensional evaluation to find the rotational characteristics of front lower arm were developed based on fundamental geometric techniques. To interpret the inspection data obtained for front chassis module, 3-D best fit method is needed. The best fit method determines the relationship between the nominal design coordinate system and the corresponding feature coordinate system. The least squares method based on singular value decomposition is used in this paper.
Keywords
Front chassis module; Dimensional analysis; Pose estimation; Absolute orientation problem; Least Squares;
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