Mechanical Shakers

<p>You want to perform or manage dynamic (vibration and shock) environmental tests, right? In this ebook you will begin the study of generating vibration and shock for vibration and shock testing, for environmental stress screening (ESS), for highly accelerated pfe testing (HALT) and for highly accelerated stress screening (HASS). </p>

<p>We&rsquo;ll briefly consider, by contrast, cpmatic measurements and testing …. natural environments. Examples: temperature, altitude, humidity, salt spray, sand and dust, fungus, solar radiation, etc.  In contrast to readers who use shakers and shock test machines for dynamic testing (my audience), their cpmatic test colleagues use environmental test chambers to simulate storage warehouses and the &ldquo;great outdoors&rdquo; such as the &ldquo;sand and dust&rdquo; on-the-ground environments in which armaments are sometimes used. </p>

<p>More germane to users of this book, we&rsquo;ll emphasize shakers and shock test machines that hopefully duppcate the man-made mechanical environments of vibration and shock. </p>

12.1. Climatic vs. dynamic testing

12.2. Why climatic environmental tests?

12.3. Developmental testing; HALT, ESS, HASS

12.4. Pre-production testing

12.5. Production sample testing

12.6. Reliability demonstration testing

12.7. Choosing a shaker

12.8. Mechanical shakers

12.9. Direct drive type shakers

12.10. Thumpers

12.11. Reaction type shakers

12.12. Mechanical shakers for ESS

12.13. Deliberate non-sinusoidal motion

12.14. Multiaxis servomotor-driven shakers