JOHN EDWARD STARR
Engineers in Minneapolis, MN
License number
Pennsylvania PE020914E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Minneapolis, MN 55447
Pennsylvania
Pennsylvania
Professional information
Computer Program And Method For Determination Of Electronic Circuit Card Product Life Capability Under Exposure To Vibration
US Patent:
6678627, Jan 13, 2004
Filed:
Jul 30, 2001
Appl. No.:
09/918180
Inventors:
John E. Starr - Plymouth MN 55447
International Classification:
G01L 124
US Classification:
702119
Abstract:
An application program and method for determining the fatigue life of electronic products exposed to vibration, including application program steps of (i) describing the mechanical configuration of the electronic product; (ii) describing the vibration profiles representing environmental exposure; (iii) calculating natural response modes of the circuit card; (iv) calculating stress functions for each component, each response mode; (v) calculating normalized fatigue damage of each component; (vi) removing computer calculation error by comparing the normalized fatigue damage for all components to the expectations; (vii) expectations numerically defined by performing equivalent analyses on test experience results; (viii) for the case of accelerated life testing, using the expectations to determine the adequacy of the design or for the case of product reliability testing, using the expectations to determine the effectiveness of the environmental screen; (ix) for the case of design development, repeating previous steps on design concepts to obtain design configurations capable of meeting design goals.
Computer Program And Method For Determination Of Electronic Circuit Card Durability Under Exposure Mechanical Shock Loading
US Patent:
2006016, Jul 20, 2006
Filed:
Oct 25, 2004
Appl. No.:
10/972682
Inventors:
John Starr - Plymouth MN, US
International Classification:
G01L 5/00
US Classification:
703014000, 702042000
Abstract:
An application program and method for determining the strength of electronic products exposed to mechanical shock, including application program steps of (i) describing the mechanical configuration of the electronic product; (ii) describing the stock response; (iii) calculating natural response modes of the circuit card; (iv) calculating stress functions for each component, each response mode; (v) using stress functions to determine modal component stresses at peak response; (vi) removing computer calculation error by comparing the stresses for all components to expectations; (vii) expectations numerically defined by performing equivalent analyses on test experience.