EEVblog 1443 - They Don’t Teach This in School! (Coherence)

A follow-up video to the Electrodynamic Shaker, showing you the critical importance of Coherence measurement. Something you’ll only get taught in the school of hard knocks! Using the Ling Electrodynamic shaker, a measurement accelerometer, and a Dynamic Signal Analyser to set up a vibration test system. 00:00 - Electrodynamic Shaker 01:20 - The most inportant thing in vibration measurement 03:56 - What is a Dymanic Signal Analyser? 06:28 - It’s all about the system response 08:12 - Your expensive calibrated setup is worthless! 08:44 - What is Coherence? 12:17 - If you’ve got a really crappy shaker 13:10 - Let’s set up a vibration test jig 13:54 - How to power and accelerometer 16:44 - What happens if you leave it flapping around in the breeze? 20:14 - Traps for young players 22:39 - Let’s sweep this sucker 26:50 - Tighten your nuts! 28:22 - Show me your coherence plot or GTFO! Previous Video: Forum: !-why-coherence-measurement-is-important/ Subscribe on Odysee: @eevblog:7 EEVblog Web Site: The 2nd EEVblog Channel: EEVdiscover: Support the EEVblog through Patreon! AliExpress Affiliate: Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! T-Shirts: #ElectronicsCreators #Vibration #Measurement Теги: eevblog,video,Dynamic Signal Anlyser,vibration measurement,vibration measurement using accelerometer,accelerometer,pcb piezotronics,electrodynamic shaker,coherence measurement,coherence function,measurement tutorial,vibration response spectrum,electrodynamic shaker working principle,electrodynamic shaker system,electrodynamic vibration shaker working principle