What the quality engineer needs to know about vibration testing part1of3
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. Part 1: 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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What the quality engineer needs to know about vibration testing part1of3
- 1. What the Quality Engineer y g needs to know about Vibration Testing Part 1 of 3 Part 1 of 3 Wayne Tustin ©2011 ASQ & Presentation Wayne Tustin Presented live on Sep 06th, 2011 http://reliabilitycalendar.org/The_Re liability_Calendar/Short_Courses/Sh liability Calendar/Short Courses/Sh ort_Courses.html
- 2. ASQ Reliability Division ASQ Reliability Division Short Course Series Short Course Series The ASQ Reliability Division is pleased to present a regular series of short courses featuring leading international practitioners, academics, and consultants. academics and consultants The goal is to provide a forum for the basic and The goal is to provide a forum for the basic and continuing education of reliability professionals. http://reliabilitycalendar.org/The_Re liability_Calendar/Short_Courses/Sh liability Calendar/Short Courses/Sh ort_Courses.html
- 3. What the Quality Engineer needs to know about Vibra7on Wayne Tus7n Equipment Reliability Ins7tute Santa Barbara, California www.equipment-‐reliability.com 805-‐564-‐1260 September 6, 2011
- 5. Figure 1-4 Naval Helicopter in Flight courtesy US Navy
- 6. Figure 14-18 “Four Poster” Shaking for Buzz, Squeak and Rattle Investigation
- 8. Figure 1 Resonance can be Fun! Courtesy Fotosearch
- 11. ff = fn
- 12. Figure 2
- 13. Figure 3
- 14. Figure 4
- 15. Figure 5
- 16. Figure 6
- 17. Make sure your designers DON’T STACK THEIR RESONANCES!
- 18. Natural frequencies? Resonances? What is Wayne talking about?
- 19. Figure 2
- 20. Figure 7
- 21. Video Clip 10-5 Second Mode Bending
- 22. Figure 8 Stroboscopic light courtesy Monarch Instrument
- 23. Video Clip 10-6 Second Mode, with Strobe
- 24. Video Clip 10-7 Sprinkling Salt to Identify Nodes
- 25. Video Clip 10-8 Salt Migrates to Two Nodes
- 26. Video Clip 10-9 Arrows Identify Nodes
- 27. Video Clip 10-10 More Salt, Seeking More Resonances
- 28. Video Clip 10-11 Three Nodes means Resonance #4
- 29. Video Clip 10-12 More Salt, Seeking More Resonances
- 30. Figure 10 8 Nodes, 9th Mode
- 31. Video Clip 20-6 Detroit Street
- 32. Figure 10 Card Cage
- 33. Animation 10-1 courtesy John Starr
- 34. Figure 11 Underneath a chip
- 35. In service, don’t let it receive much excita7on at 174, 258 or 341 Hz. DON’T STACK YOUR RESONANCES!
- 36. More commonly, your know the fns of your customer’s hardware. If you don’t know, ask him. Tell your PWA designers to avoid those frequencies. Shake test the PWA.
- 37. Make sure your designers DON’T STACK THEIR RESONANCES!
- 38. Figure 12 courtesy Endevco
- 39. Figure 13 Compression Piezoelectric Accelerometer
- 40. Figure 14 Data Acquisition Front-end Courtesy Dewetron America, Inc.
- 41. Figure 15 Courtesy Sound & Vibra7on magazine
- 42. Figure 16 g2/Hz frequency - Hz
- 43. What the Quality Engineer needs to know about Vibra7on Wayne Tus7n Equipment Reliability Ins7tute Santa Barbara, California www.equipment-‐reliability.com 805-‐564-‐1260