J. J. Shah and M. T. Rogers. Assembly modeling as an extension of feature-based design. Research in Engineering Design, 5(3,4):218--237, 1993.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....OF RELATED WORK Assembly Representation: In order to use computeraided assembly design and planning systems, we need to have computer interpretable assembly representations. A number of di#erent techniques have been developed to represent assemblies (Lee and Gossard, 1985; Lin and Chang, 1990; Shah and Rogers, 1993; Seow and Devanathan, 1994) In many of these techniques, each individual part is represented by its geometric model, and the assembly is represented by the relative position and orientation of each individual part in the final assembled configuration. Most non geometric information such as fits, ....

J. J. Shah and M. T. Rogers. Assembly modeling as an extension of feature-based design. Research in Engineering Design, 5(3,4):218--237, 1993.

.... The optimal geometric representation for SFF is likely to remain a long term research issue, but such investigations can profit from recent diverse perspectives [22, 31, 37, 44] The use of tags [22] is representative of the possibility to augment local geometry with feature information [7, 9, 11, 13, 14, 15, 16, 17, 19, 21, 23, 24, 27, 28, 29, 30, 32, 33, 34, 35, 36, 38, 39, 40, 41, 42, 43]. The .STL representation is devoid of feature information, but it appears to be timely to consider including such feature information. The GSL is essentially a scripting language that calls an underlying geometric modeler to construct a model of the part. Some GSL specifications may be entirely ....

Shah, J. J., and Rogers, M. T., Assembly modeling as an extension of featurebased design, Research in Engineering Design, 1993, Vol. 5, No. 3 & 4, 218 - 237.

....both constraint approaches have been applied. References applying the algebraic numeric approach in assembly modelling are: AP75] PAB80] Pop87] LG85] LA85] KL87] and [Mul87] References applying to assembly modelling employing the geometry based approaches are: LN91] Kra92] AKC92] and [SR93]. In feature modelling and definition, constraints also play an important role. Most often, feature related constraints are related to dimensions and tolerances. These constraints are also most often transformed into numeric algebraic equations and solved by means of rules, numeric iterative ....

....to dimensions and tolerances. These constraints are also most often transformed into numeric algebraic equations and solved by means of rules, numeric iterative techniques etc. However, recently it has been proposed to use geometric domain knowledge when solving feature related constraints, e.g. [SR93], SBRU94] In this respect, Shah et al. distinguish a procedural and a declarative approach towards feature based design, where the procedural approach is the older approach and the descriptive approach the newer one based on using geometric domain knowledge. In the following we will focus on the ....

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Shah J.J., Rogers M.T., Assembly modeling as an extension of feature based design, Research in Engineering Design, Vol. 5, 1993, 218--237.

.... solved using domain knowledge of the geometry domain based on theory from kinematics based on the degrees of freedom theory by Kramer [KRA 92] and Liu and Nnaji [LIU 91] The approach in FROOM towards nominal geometric constraints is very similar to that of Anantha et al. ANA 92] and Shah et al. SHA 93a] SHA 94] which are also based on Kramer s previous work [KRA 92] With respect to translating all nominal geometric constraints into parameter constraints an approach often performed in today s CAD systems and referred to as parametric or variational modelling this domain knowledge based ....

Shah J.J., Rogers M.T., Assembly modeling as an extension of feature based design, Research in Engineering Design, Vol. 5, 1993, 218--237.

.... 2D sketcher (Brown Associates, 1993) Several academic systems are currently using the degrees of freedom analysis for other applications like assembly modeling (Anantha, Kramer Crawford, 1992) editing and animating planar linkages (Brunkhart, 1994) and feature based design (Salomons, 1994; Shah Rogers, 1993). GCE employs a set of specialized routines called plan fragments to create the assembly plan. A plan fragment specifies how to change the configuration of a geom using a fixed set of operators and the available degrees of freedom, so that a new constraint is satisfied while preserving all prior ....

Shah, J. J., & Rogers, M. T. (1993). Assembly modeling as an extension of feature-based design.

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Shah, J. J., and Rogers, M. T. (1993) Assembly modeling as an extension of feature-based design, Research in Engineering Design, 1993, 5, (3 & 4), 218 - 237.

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Shah J.J., Rogers M.T., (1993b) Assembly modeling as an extension of feature--based design, Research in Engineering Design, v. 5, 218--37.

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