“The energy-harvesting devices are efficient at providing electrical power from arbitrary, non-periodic vibrations,” said the University. “This type of vibration is a by-product of traffic driving on ...

For example, a random-on-random vibration specification may be equivalent to a random excitation with a carefully designed kurtosis. Either of these approaches could be equivalent to excitation ...

At very low frequencies, for example, seismologists could pick up the random vibrations from distant earthquakes to obtain local stratigraphic information without setting off directed explosives.

Random Vibration Test Profiles Courtesy of NASA Dryden Flight Research Center Curve A is the easiest to understand. The rectangular portion of this curve extends from 15 Hz to 1,000 Hz with a psd ...

Mini generators make energy from random ambient vibrations. ScienceDaily . Retrieved June 3, 2025 from www.sciencedaily.com / releases / 2010 / 03 / 100323105952.htm ...

ANN ARBOR, Mich.---Tiny generators developed at the University of Michigan could produce enough electricity from random, ambient vibrations to power a wristwatch, pacemaker or wireless sensor. The ...

Random-vibration analysis and overall rms values • In the FEA model of the 2-DOF spring-mass system, we selected a range of frequencies limited to ±10% on either side of the two resonant ...