This paper undertakes the problem of Design Centering and Tolerancing (DCT). This subject plays important role in design of analog circuits. Practically it is impossible to obtain the optimum solution by mathematically described computational methods, and the problem is numbered to NP-difficult category. Optimum nominal values and tolerances of analog circuit parameters such as resistance, capa...

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Students often have difficulty grasping the principles of dimensional tolerances and frequently fail to recognize that dimensioning practice has a significant impact on the tolerance of part features. This observation may be attributed to several factors, not the least of which are changes in prior student education and life experiences and increasing pressure in academia to add course content ...

A significant amount of research efforts has been given to explore the mathematical basis for 3D dimensional and geometric tolerance representation, analysis, and synthesis. However, engineering semantics is not maintained in these mathematic models. In this paper, a new semantic tolerance modeling scheme based on modal interval is introduced to improve interpretability of tolerance modeling. W...

This paper proposes a study of a milling process planning to determine the tolerancing for manufacturing using statistical tool. The deviation between the machined surface and the surface corresponding to the nominal one due to combined errors is expressed in terms of the small displacement torsor parameters. These parameters are considered as random variables, displacements are expresses as va...

A new approach for the metrology on Coordinate Measuring Machine (CMM) is presented. It is based on the utilization of virtual gauges. The originality of the presented virtual gauge model is the notion of «fitter gauge» which develops the traditional possibilities of gauges. This model allows the verification of functional specifications of the geometrical tolerancing. An example of inspection ...

This paper describes the development of a prototype software package for solving functional dimensioning and tolerancing (FD&T) problems in a Concurrent Engineering environment. It provides a systematic way of converting functional requirements of a product into dimensional specifications by means of the following steps: firstly, the relationships necessary for solving FD&T problems are represe...