rss correction factor for tolerance stack-up analysis
 

rss correction factor for tolerance stack-up analysis
all,
i came across an equation for a correction factor for rss tolerance analysis and was wondering if someone here could ellaborate on it for me. i have typically used a 1.5 times the rss tolerance stack type of adjustment as compared to using a worst case tolerance stack. but, a customer recomended i use a modified correction factor instead of the 1.5 times the rss using the following equation:
{.5*(rss-wc)/[rss*sqrt(# of dimensions)-1]}+1
where rss is the root square mean of tolerance stack-up and wc is the worst case tolerance stack.
the correction factor computed when then be multiplied by the rss of the data to find the adjusted rss. i was wondering where this equation came from so i could use it for other future programs... thanks
j-mo
posting in the eng-tips forums is a member-only feature.
promoting, selling, recruiting and student posting
are not allowed in the forums.
(add stickiness to your site by linking to this professionally managed technical forum)
title: drafting standards,
description: drafting standards, gd&t & tolerance analysis technical support forum and mutual help system for engineering professionals. selling and recruiting forbidden.