Part location algorithms for an intelligent fixturing system Part 2: Algorithm testing and evaluation

Citation
D. Chakraborty et al., Part location algorithms for an intelligent fixturing system Part 2: Algorithm testing and evaluation, J MANUF SYS, 20(2), 2001, pp. 135-148
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering Management /General
Journal title
JOURNAL OF MANUFACTURING SYSTEMS
ISSN journal
0278-6125 → ACNP
Volume
20
Issue
2
Year of publication
2001
Pages
135 - 148
Database
ISI
SICI code
0278-6125(2001)20:2<135:PLAFAI>2.0.ZU;2-M
Abstract
An Intelligent Fixturing System (IFS) is currently being developed to hold a family of cylinder heads for machining operations. This system incorporat es a Part Location System (PLS) to locate the workpiece reference frame of a cylinder head relative to a pallet. This two-part paper describes the dev elopment and evaluation of various part location algorithms that have been created for this application. Part 2 of this paper describes a series of si mulation experiments that was carried out to assess the accuracy and comput ation speed of the SeQuential Least Squares (SQLS) algorithm, the SiMultane ous Least Squares (SMLS) algorithm, and the SQLS-SMLS (fixed cd) algorithm. The results of this study reveal that the SQLS algorithm is fast to execut e, but its accuracy is very sensitive to random variations in the coordinat e data. Alternatively, the SMLS algorithm is insensitive to random variatio ns in the coordinate data but is computationally more expensive to execute. Furthermore, its accuracy is sensitive to bias errors in the chordal dista nce between the dowel holes. Only the SQLS-SMLS (fixed cd) is insensitive t o both types of variations.