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...

In current tolerancng practice, designers have to manually specify tolerances: either on a drawing or in a CAD system. Different designers will possibly arrive at different tolerance specifications for the same nominal geometry. ,The paper demonstrates that this situation can be avoided in the case of functional tolerancing with a focus on the geometry relevant for functioning. Under this restr...

A computer aided tolerance analysis tool is presented that assists the designer in evaluating worst case quality of assembly after tolerances have been specified. In tolerance analysis calculations, sets of equations are generated. The number of equations can be restricted by using a minimum number of points in which quality of assembly is calculated. The number of points needed depends on the ...

YU DING,1 JIONGHUA JIN,2 DARIUSZ CEGLAREK3 and JIANJUN SHI4 1Department of Industrial Engineering, Texas A&M University, College Station, TX 77843, USA E-mail: [email protected] 2Department of Systems and Industrial Engineering, The University of Arizona, Tucson, AZ 85721, USA E-mail: [email protected] 3Department of Industrial Engineering, University of Wisconsin—Madison, Madison, WI ...

The submacrogeometric (tolerance) variations of mechanical components have an important impact on product function. The problem of combining tolerance assignment in engineering design with tolerance control in manufacturing and quality assurance presents a continuing challenge to researchers. This paper illustrates the feasibility of using fractal-based methods for the problem of tolerance spec...

We present a new method for numerical propagation through Lyot-style coronagraphs using finite occulting masks. Standard methods for coronagraphic simulations involve Fast Fourier Transforms (FFT) of very large arrays, and computing power is an issue for the design and tolerancing of coronagraphs on segmented Extremely Large Telescopes (ELT) in order to handle both the speed and memory requirem...

This paper introduces a new approach for the optimal geometric design and tolerancing of multibody systems. The approach optimizes both the nominal system dimensions and the associated tolerances by solving a reliability-based design optimization (RDBO) problem under the assumption of truncated normal distributions of the geometric properties. The solution is obtained by first constructing the ...

We describe two different, double-sided interferometer designs for measuring material stability. Both designs are balanced interferometers where the only optical path difference is the sample and the reference beams are located within the interferometer. One interferometer is a double-pass design, whereas the other is a single-pass system. Based on a tolerancing analysis, the single-pass system...