Computer program, system and method to specify sinusoidal vibration tests for product durability validation
US5847259A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M7/022
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An application program and computer system for determining the testing profile for accelerated laboratory sinusoidal vibrational testing of a product, includes the application program steps of (i) selecting the type and rate for the frequency sweep, (ii) developing a simplified composite Power Spectral Density function PSD.sub.j representing expected field vibration levels, (iii) developing the acceleration force function G.sub.T (f) corresponding to the PSD function, (iv) determining the stress response curve H(f) for the product, (v) selecting the number of frequency sweeps N.sub.W based on the testing equipment, the testing time available, and the range of acceleration forces required for implementing G.sub.T (f) from the relationship ##EQU1## where K is a constant, (vi) recalculating the acceleration forces G.sub.u, and then (vii) testing the product using the selected variables to validate the required performance lifetime for the product when no test failures are observed over all of the N.sub.W test sweeps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.