Problems in High-Shock Measurement
Engineers and scientists for years have struggled trying to improve the quality of high-g shock measurement. The biggest challenge has always been to pinpoint the source(s) of the problem. This paper discusses a major source of errors - the shock accelerometer, and suggests a practical solution.
The input spectrum of high-g shock, be it mechanical or pyrotechnic, has always been underestimated by practitioners in the measurement industry, leading to improper test equipment selections. Furthermore, most transducer manufacturers have very limited experience in high-g shock test, and it is reflected in the design approaches of many so called "shock" accelerometers. This author suggests that, in close-range (near-field) high-g shock measurement, the accelerometer must be protected from all ultra high frequency input energy in order to avoid sensor resonance, which is the root cause of many problems in high-g shock measurement. This paper also outlines the ingredients of a true shock accelerometer.
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