Fundamentals of Random Vibration and Shock Testing, HALT, ESS, HASS, Measurements, Analysis and Calibration Training Course.

Today and in the near future we protectively install commercial-off-the-shelf (COTS) equipment in our flight, land vehicles and shipboard locations where vibration and shock can be severe. We laboratory test the protected equipment
(1) to assure twenty years equipment survival and possible combat, also
(2) to meet commercial test standards, IEC documents, military standards such as STANAG or MIL-STD-810G, etc.
Few if any engineering schools teach about such protection or such testing.
Hence this specialized training course.

Training Course description

Discussion, supported by projected visuals and video clips.

Commencing with a review of basic vibrations, sources and causes, we will explore vibration measurements, analysis and calibration. We’ll compare sinusoidal vs. random vibration testing systems, specifications, standards and procedures. We will discuss ESS, HALT and HASS.

We’ll emphasize vibration and shock test fixture design, fabrication, experimental evaluation and usage. Also shock measurement, shock response spectrum (SRS) and shock testing. Review of modal testing. We emphasize topics you will use immediately.

Objectives

After this short training course, you will be able to

• measure vibration and shock,
• calibrate vibration and shock measurement systems,
• convert field measured data into a test program,
• interpret vibration and shock test requirements,
• supervise vibration and shock tests,
• specify and experimentally evaluate vibration and shock test fixtures,
• perform ESS, HALT and HASS.

When you visit a lab or review a test program, you will have a good understanding of the requirements and execution of a dynamics test and so be able to ask meaningful questions and understand the lab’s responses.

For whom intended

• I need practical knowledge about mechanical vibration and mechanical shock test, measurement, analysis, designing for dynamics also calibration and/or control because my work requires me to:
• a) instrument land, sea and air vehicles as well as fixed-based equipment, in order to measure mechanical vibration and/or shock in service and during transport.
• b) analyze dynamic responses to mechanical vibration and shock inputs during normal and abnormal transport.
• c) My title may be mechanical engineer, mechanical designer or packaging engineer. I design (ruggedize) products that must withstand factory handling + transport + normal and abnormal usage. I design products to dynamic requirements, which I don't fully understand. Then I send a prototype to our lab for testing. I really don't understand what our lab does. I'd better find out.
• d) write contracts for procuring high-rel equipment. I need to understand HALT, ESS and HASS. When do these acronyms apply? How do I ensure that potential contractors will appropriately implement the random vibration requirements of these acronyms? What is g²/Hz?
• e) work in an environmental test lab. We perform vibration and shock tests on prototype hardware. These tests may be part of developing a new product, of determining vibration levels for future production ESS (environmental stress screening) or production tests, or of investigating in-service or transport failures.
• f) calibrate various vibration and shock sensors (including accelerometers) and analyze vibration and/or shock.
• g) design to control (reduce) the intensity of vibration and/or shock, which otherwise may damage equipment that cannot be made sufficiently rugged to survive all inputs.
• h) maintain machinery whose vibration signature can warn of approaching failure.

If you thought, "aha - that's what I'm supposed to do" to any of the job descriptions listed above, then the instructor says, "This training course is intended for you." It will help you move up your own "learning curve."

A smaller group, for whom the instructor also intends this training course:

• supervisors of any of the above listed activities.
• Perhaps you were thrust into this responsibility without adequate training.
• Maybe your predecessor had no opportunity to alert you to potential difficulties.
• You certainly need to know what your people are talking about.
• Possibly you had no formal training for your present responsibilities.
• You need to explain your department's activities to your superiors in the technically correct language.
• Perhaps you need to decide between "in house" and "outside" testing.

Text Materials

Each participant receives a copy of Wayne's 2005 text 'A minimal-mathematics Introduction to the Fundamentals of Random Vibration and Shock Testing, HALT, ESS & HASS, also Measurements, Analysis & Calibration', including a CD containing a number of video clips pertaining to sine and random vibration and shock behavior and testing.

Sharing

There will be an opportunity, sometime during the three days, for each participant to show the others what his activity is currently working on. Participants might bring a model, a photo, a drawing or 1 or 2 digitized photos or drawings on a CD-ROM or a USB-port memory device for display on the instructor's PC and video projector. Participants are invited to bring a USB-port memory device to duplicate 1 or 2 of the lecture slides for their own use in passing to colleagues what they have learned at the course.

About the Lecturer

Wayne Tustin
Wayne's first involvement in vibration and shock, measurement and testing was at Boeing/Seattle in 1948. Boeing was not only measuring in-flight vibrations but also pioneering (on the XB47 and XB52 bombers) the use of (homemade) electrodynamic shakers for what much later came to be known as modal testing. Wayne used that practical experience while heading field service and technical training at a pioneer shaker system manufacturer (MB Electronics, later reorganized as MB Dynamics) 1954-61.
From 1962-90 he directed a small, specialized engineering school. Since 1990, Equipment Reliability Group (ERG - now a subsidiary) has provided consulting services.
Resuming teaching in 1995, he organized Equipment Reliability Institute (ERI) to provide specialized technical education, mainly onsite, at the facilities of companies and agencies, for test personnel and designers.
He currently teaches a short course "Automotive Vibration and BSR (Buzz, Squeak and Rattle) Testing," several times per year, for the Society of Automotive Engineers (SAE). Also a few "open" courses and individualized "distance learning" for individuals, via CD-ROM and e-mail..

Testimonials

Registration

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