Pros and Cons of HALT Compared to Electrodynamic (ED) Shaker Testing

Alec Feinberg
Dr. Alec Feinberg is the founder of DfRSoft. He has a Ph.D. in Physics and is the principal author of the book, Design for Reliability. Alec has provided reliability engineering services in all areas of reliability including solar, thin film power electronics, defense, microelectronics, aerospace, wireless electronics, and automotive electrical systems. He has provided training classes in Design more


There are two main types of Random vibration used in testing today, these are repetitive shock which is used mainly in HALT chambers and electrodynamic vibrations used for ED shakers. Each stimulus can produce high intense vibrations that can test and screen your product. Why then should we use one method over the other? How does the quality of repetitve shock compare to electrodynamic vibration? How are these test methods different? Are we actively using one tool too much due to limited options? As the saying goes, “If you only have a hammer, everything begins to look like a nail.” Also, is there a difference from an analytical view point or is the bottom line simply vibration exposure? We need to understand our analytical limits as well. It is important to understand the differences since vibration equipment is very expensive and we need to make wise investments and decisions. In this seminar we will address these concerns. We will look at our options and when these tests can actually overlap and when they do not. We will provide insight to help guide one in smart test choices.

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