1993 are studied extensive numerical experiments on

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Unformatted text preview: periments is conducted and the results show a significant reduction in computation time and an improvement in the accuracy of the tolerance evaluation process. 2. BACKGROUND Coordinate Measuring Machines (CMM) and/or non-contact scanning equipment are used to sample discrete points from the manufactured surfaces. The number and locations of measurements are among the most important parameters that affect the accuracy and validation of the whole inspection process. Unfortunately, no standard procedure or guideline has been developed to determine the optimum number and ideal sample location. After a surface point measurement, the conformance of the actual surface to the desired tolerance is evaluated by fitting a substitute geometry to the measured points. Fitting is achieved by minimizing an error function between the acquired points and the substitute geometry. Linearization and approximation methods are utilized by most fitting algorithms to simplify the problem and to speed up computat...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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