PRISM Forum

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Posted by: Thomas Urbanczyk (thomas.urbanczyk@systema-gmbh.de )
Organization:Systema Engineering
Date posted: Thu Nov 4 9:52:14 US/Eastern 2004
Subject: How to calculate failure rates for PCBs
Message:
Is it possible to model PCBs in PRISM?
What method would you suggest to model PCBs in PRISM? In other prediction tools like Isograph Workbench (MIL-HDBK-217F) it is possible to use a "Interconnetion Assembly" to take thermal interaction between components and PCB into account. Best regards Thomas Urbanczyk

Replies:
Calculating failure rates of PCB's
David Dylis Thu Nov 4 13:59:14 US/Eastern 2004

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Posted by: vallon (jerome.vallon-renexter@renault.com )
Organization:renault
Date posted: Wed Nov 3 10:15:31 US/Eastern 2004
Subject: Power MOSFET reliability data
Message:
I search some reliability data about power semiconductor like Power MOSFET (70V, 100A) or power IGBT (600V, 100A). these kind of device was used in power inverter (DC-AC converter)and work in switching mode (ON-OFF).
Thank

Replies:
IGBT Failure Rates
David Dylis Thu Nov 4 14:36:27 US/Eastern 2004

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Posted by: Fargneil Ausenhaus
Date posted: Thu Jul 29 15:15:49 US/Eastern 2004
Subject: Prism
Message:
I am wondering how one is to use this software to account for several stages of a products life span. We must incorporate shelf time, transport, launch, and operation of a device but I see no way to do this all in one system. Furthermore, how do we accomodate the proper proportions of the overall life span for each stage, ie how do I make the travel time 1/20 of the overall lifetime? Thank you for whomever's assistance.

Replies:
Assessing Multiple Usage Profiles
David Dylis Mon Aug 9 10:01:13 US/Eastern 2004

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Posted by: Giovanni Luciani (giovanni.luciani@galileoavionica.it )
Organization:Galileo Avionica
Date posted: Tue Apr 13 10:05:36 US/Eastern 2004
Subject: Duty cycle assessment/Operating hours conversion
Message:
Hello
Suppose to have an item with 360 yearly operating hours distributed among 240 yearly operating days, the duty cycle will have to be assessed dividing the annual operating hour by 240*24 or 365*24? Thank you in advance for your support Thank you for your support

Replies:
Duty cycle assessment/Operating hours conversion
Nathan Holzhauer Tue Apr 13 11:04:40 US/Eastern 2004

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Posted by: Cong Nguyen (cong.nguyen@drs-ss.com )
Organization:DRS Technologies-Signal Solutions
Date posted: Thu Apr 8 15:59:12 US/Eastern 2004
Subject: PRISM
Message:
Dear RAC,
What electronic components PRISM does not support, e.g., Inductor, Oscillator? Is there a way to import failure data from other software (Relex) to compensate for these 'not-supporting' components? Thanks

Replies:
PRISM component models
David Dylis Fri Apr 16 9:03:33 US/Eastern 2004

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