SRC Forum - Message Replies


Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

Back to message list Topics List About this forum
Original Message:

Posted by: Glen Hanington (ghanington@elgar.com )
Organization:Elgar Electronics Corp.
Date posted: Thu Feb 17 14:00:36 US/Eastern 2005
Subject: Accelerated Life Testing
Message:
I am looking to prove a 50,000 hour MTBF for a power supply design in as short a time and most cost effective way possible. The product is rated to 50degC. Each one is large and bulky, and costs several thousand dollars to produce, so having a large quantity of units on an accelerated life test at constant temperature would be prohibitive in both cost and temperature chamber availability. I would like to be able to increase my rate of failure precipitation by employing both input power and temperature cycling. While I understand that the Arrhenius equation can only be used to accomodate a single constant acceleration factor, has anyone ever been able to justify this approach to speed up the process? What would be required in order to justify this technique? How does it affect confidence level determination? What would be your recommendation?


Reply:

Subject: Accelerated Testing
Reply Posted by: bwd (bdudley@alionscience.com )
Organization: RAC
Date Posted: Mon Feb 21 11:12:04 US/Eastern 2005
Message:
The RAC Tool Box has a descriptive assessment and formula for a number of accelerated testing techniques. One of these techniques might interest you in your search for alternate accelerated test other then the Arrhenius model. This information is located on the RAC home page by accessing the following site: http://rac.alionscience.com/cgi-rac/toolboxsearch.cgi?query=accelerated+testing&x=12&y=15


Back to message list Topics List About this forum
Reply to this message