What the Quality Engineer Needs to Know About Vibration Testing (Part 1 of 3)

Wayne Tustin
Wayne Tustin’s training and consulting (licensed Professional Engineer in the State of California) interests lie in the environments that can lessen equipment availability, that can cause equipment downtime. His particular concerns: dynamics, primarily the measurement, analysis and simulation (in environmental testing laboratories) of mechanical shock and vibration (particularly random vibration...read more


Wayne will sample, in 3 hours, his 3-day course. In the 3 hours, he will introduce the concept of resonant behavior of a wide range of structures (the Tacoma Narrows Bridge down to electronic circuit boards). Laboratory vibration tests on samples determine whether product design and manufacture have avoided or at least lessened resonant responses. Wayne will introduce sinusoidal as well as random vibration test standards. He will show, by slides and video clips, how we perform those standard tests by means of (1.) EH or electrohydraulic or servohydraulic shaker systems and (2.) ED or electrodynamic shaker systems, including their power amplifiers and their controllers. How does in-service vibr damage hardware? Animation of card flexing; show chip with damaged ball grid. Why is such weakness important to QE? How do we measure in-service vibr? Why re such measurements important to QE? Seismic & Land vehicles & Ships will use on-board accelerometer sensors & recorders; explain what accelerometer is, where place, how electrical signal is on-board recorded for later study, data becomes test spec. Air vehicles on-board accelerometer sensors & telemetry much the same but record to higher frequencies and telemeter signals to ground for recording, study & becomes test spec.

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