Responses of a Highly Accelerated Life Test System to Impacts from Different Designs of Hammers

Abstract

The response of a table to the impact of its driving hammer in the highly accelerated life test (HALT) system depends on, among other things, the location of the hammer, the presence of multiple hammers, and the angle at which the hammer is mounted to the table. The present study investigated the response of a table to a variety of impacts from different combinations of hammers. It began with a theoretical analysis of the forces of impact exerted by hammers which led to the calculation of the corresponding displacement. These theoretical calculations revealed the mechanics of the HALT system to help explain the working principles behind this complex system. Then a simulation model was built to check the accuracy of the theoretical results. Finally, the accelerations of a table in a real HALT system were measured. These data showed good agreement with the experimental results and computer simulation. The responses of HALT systems have not been investigated thoroughly to date. The current study can help equipment designers and end users better understand the working principles of this kind of systems. It can be considered a breakthrough in terms of improving the performance of reliability testing with this kind of system.