Automotive Vibration & BSR Testing

A seminar entitled "Automotive Vibration and BSR Testing" will be offered on February 23-25, 2000 in Troy, Michigan at the SAE Professional Engineering Education Center. During this seminar, you will review vibration and acoustics theory, then move into discussion of measuring structure-borne vibration and air-borne (buzzes, squeaks, and rattles) sounds. A major subject: shaker selection and tradeoffs, shaker capabilities and shaker limitations will be discussed. Primary emphasis will be given to (1) a clear explanation of why random vibration testing has largely replaced sine testing, to (2) the benefits of multi-axis shaking, to (3) the role of random vibration in environmental stress screening (ESS) and (4) in buzz, squeak and rattle (BSR) testing. Mathematics is minimized. If your firm is new to vibration, this workshop can help you to avoid such expensive mistakes as buying the wrong shaker. Audience participation is encouraged. Lectures are supported by numerous 35mm slides, overhead transparencies and videotapes.

Attendees are requested to bring calculators with them to the seminar.

Objective

This seminar focuses on:

• The use of accelerometer systems for measuring vibration
• Microphone systems for measuring unwanted BSR sounds
• Shaker systems for simulating the effect of engine and drive train vibrations as well as road inputs on various automobile, truck and bus components and systems
• Environmental stress screening (ESS) of automotive electronics production

Who Should Attend

The seminar will benefit you if you are a(n) automotive test engineer or technician who performs vibration or BSR investigations or tests or if you head a dynamics lab. Also, if you are a quality or reliability specialist who interfaces with testing, or a designer whose products will be tested. This minimal-theory, minimal-mathematics short course is intended for all those who need to speak the specialized language of vibration.

Seminar Content

• Review of Vibration Fundamentals
• Introduction to Buzz, Squeak, Rattle (BSR); Why Has it Become a Problem?
• Vibration and Acoustic Instrumentation and Measurements
• Proliferation of Sound Quality Metrics
• Calibration of Sensors and Systems; Traceability to NISTS
• Shakers Systems-Their Principles, Features and Automotive Test Limitations
• Mechanical (very brief)
• Electrohydraulic shaker systems vibrate major assemblies,
• entire vehicle
• Electrodynamic shaker systems vibrate sub assemblies and parts
• BSR tests require quiet shaker in quiet location
• Controls for Classical Sinusoidal Vibration Testing, Emphasizing Automotive Tests
• Analog controls
• Digital controls
• Specifications for Sine Vibration Tests and for BSR Test Sine Inputs
• Introduction to Random Vibration, Particularly Road Inputs to Automotive Vehicles
• Measurement and Analysis of Automotive Random Vibration - PSD/ASD
• Specifications for Random Vibration Tests
• Controls for Random Vibration Testing, Emphasizing Automotive Tests
• Analog Signal Sources and Equalization
• Digital Signal Sources and Spectrum Shaping
• Fixtures for Attaching Automotive Components and Systems to Shakers
• Road Simulation - NVH (Noise, Vibration, Harshness) Tests
• Interpreting and Implementing BSR Standards, e.g. ISO 532B of Electronics Production, Aimed at Increased Reliability of Vehicle Systems
• Current Interest in HASS (Highly Accelerated Stress Screening) and HALT (Highly Accelerated Life Testing) During Buzz, Squeak and Rattle (BSR) Testing
• Identifying BSR Sources and Paths
• Combining Thermal Stressing with Vibration and with BSR Testing
• Environmental Stress Screening (ESS) of New Product Development

Instructor: Wayne Tustin

Mr. Wayne Tustin received the BSEE degree from the Univ. of Washington, Seattle. His introduction to environmental testing, including vibration and shock, was at Boeing Co. in Seattle. He directed field service and technical training activities at MB Electronics (a pioneer supplier of electrohydraulic and electrodynamic shakers), New Haven, CT. Mr. Tustin founded and was a director of a private engineering school for 30 years. During that period, he personally taught many vibration courses in the USA and abroad. The majority of his Detroit courses were taught at Ford Motor Co. He currently teaches and consults through Equipment Reliability Institute. He is a Fellow of the Institute of Environmental Sciences and a member of the Society of Environmental Engineers (Great Britain).

Fee $995; SAE members - $895
1.8 Continuing Education Units

For additional information or to register, please contact SAE Professional Development at 724-772-7148, Email: profdev@sae.org, Website: www.sae.org.

Edited by Paul O'Shea