Two parts, each with two holes, are to be pinned together by some type of fastener. Nominally the holes on part 1 are to match the holes on part 2 and the fastener diameters should be smaller than the hole diameters. Due to variation in hole diameters, fastener diameters and hole center positions loose pinning of the two parts may no longer be possible. The problem considered here is to define ...

This paper introduces an analytical method to calculate segment-level wavefront error tolerances in order enable the detection of faint extra-solar planets using segmented telescopes space. study provides a full treatment spatially uncorrelated segment phasing errors for telescope coronagraphy, which has so far only been approached ad hoc Monte-Carlo simulations. Instead describing tolerance gl...

The focus of this paper is concerned with the practical aspects of designing optical instruments which are intended for production in large or even small quantities . Certain aspects of performance are required of an instrument which is its reason to exist . It is usually expedient, plus fiscally and ecologically sound, to strive for an overall efficient use of resources in the life cycle of th...

This paper describes the Linear Parametric Model of Geometric Uncertainty (LPMGU). The model, based on our previous work on shape and position uncertainties, describes the worst-case first-order approximations of the uncertainty zones of basic geometric entities. It is general and expressive, allows for parameter dependencies typical of tolerance specifications, and can be uniformly used to stu...

A profile is a relationship between a response variable and one or more independent variables being controlled during the time. Process Capability Indices (PCI) are measured to evaluate the performance of processes in producing conforming products. Despite frequent applications of profile and a variety of available methods to monitor its different types, little researches have been carried out ...