Comparison testing of shock versus vibration ESS systems
It is well known that environmental stress screening (ESS) is a very effective tool for improving product reliability; however, because of the high cost and long duration required for this process, most people still choose not to utilize this great tool in the manufacturing process. This author has developed a new ESS approach and equipment that will greatly reduce the time and cost for the ESS process. This approach is to screen the complete product/system once to find significant structural and interconnection problems and correct them, then to take the P.C. boards out of the chassis to screen them independently on a skewed (angled) fixture to achieve 3-directional input1. Since this system uses a controlled random vibration profile on an electro-dynamic shaker, it will not have the shock input problems of the pneumatic hammer system, which has very high energy at frequencies not normally seen by the product and not enough energy at low frequencies to screen out problems encountered during shipping, handling and operation. A direct comparison test is conducted on several different types of products; the effectiveness, screen time, and cost, as well as vibrational intensity needed for the process, are reported in detail.
Hongsun Liu Larry Foshee Ron Weglinski Susan Mercovich Greg Wilterdink
Quanta Laboratories Motion Engineering Transistor Devices Inc
国际会议
第六届国际振动工程会议(The 6th International Conference on Vibration Engineering)(ICVE’ 2008)
大连
英文
2008-06-04（万方平台首次上网日期，不代表论文的发表时间）