Accession Number:

AD0684131

Title:

DISPERSION ANALYSIS BY A SINGLE APPLICATION OF SIMULTANEOUS TOLERANCES

Descriptive Note:

Rept. 1 Jun-1 Sep 1967

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA SYSTEMS ENGINEERING OPERATIONS

Personal Author(s):

Report Date:

1969-02-19

Pagination or Media Count:

28.0

Abstract:

The paper presents a new and simplified method of performing a dispersion analysis. The technique consists of performing a single analysis in which appropriately scaled system tolerances are applied simultaneously in the same direction. This contrasts with the popular and well-known root-sum-square approach, which requires conducting a series of analyses in which the system parameters are varied one at a time and the results are then root-sum-squared. The difference between the proposed approach and the conventional approach is on the order of 10 percent, usually in a conservative direction. An interesting corollary of the technique is the estimation of the number of standard deviations contained in a dispersion resulting from a number of parameters being displaced from their nominal values in a worst-on-worst fashion.

Subject Categories:

  • Statistics and Probability

Distribution Statement:

APPROVED FOR PUBLIC RELEASE