Brief overview for management and participants
Classical approach to thermal environmental testing – simulation
Purpose of environmental testing during development
- Purpose of HALT – highly accelerated life testing
- Purpose of environmental stress screening (ESS) as production step
- Initially 100%; later sampling
- Commonly-used tools: thermal ramping and random vibration
- Importance of rapid thermal ramping
- Opportunity to determine and extend limits during product development
Classical sinusoidal vibration never observed in service; useful concept
- Introduction: terminology, importance of understanding resonant behavior
- Electrohydraulic and electrodynamic shaker systems
- Resonance searches and dwells
Introduction to random vibration
- Sources of random vibration in service and transportation
- Spectral density measurement and analysis – the frequency domain
- Probability density – the time domain
Random vibration test practice – simulation
- Interpreting, implementing, ignoring military standards, e.g. MIL-STD-810
- Recommended test practices, e.g. IEST
- Equalization before testing; methods and limits
Determining and extending limits – stimulation
- HALT – highly accelerated life testing during product development
- HASS – highly accelerated stress screening (post production)
- ESS – Environmental stress screening of electronics hardware production
- Philosophical differences from testing – stimulation vs. simulation Multiple- vs. conventional single-axis-at-a-time vibration
- Conventional single-axis
- Mechanical and pneumatic repetitive shock (RS) stimulators
Attachment fixtures; vacuum hold-downs
Additional climatic verification test methods: temperature, altitude, humidity, salt spray, etc. as time permits
Summary of course for management and participants
Contact us for pricing and information at:
(805) 456-4274 or
info@equipment-reliability.com
“Imperative information for anyone with any level of involvement in the industry”
“Nice overview of theories of vibration, shaker tables, shock and their application in real-world testing”