ISO 501 - Isolating Shipboard Electronic Equipment
Overview
- SV qualification of present and future shipboard electronic equipment
- Typical SV-induced damage – description, photos, history, functional problems
- Benefits of isolating COTS electronics – reduced cost, improved designs, reliability
- Shipboard and life cycle SV conditions - combat situations modeled by ship shock
- Typical SV levels vs. performance criteria
Shock and vibration (SV) awareness
- Basic theory of isolation; technical literature beyond that provided; references
- SV tests – standards, specifications, test labs – description and documentation
- MIL-STD-167, MIL-S-901D, MIL-STD-810G testing and requirements – photos & videos
- Examples of shipboard qualification tests and data - photos and videos - details of performing a test
- Interpreting procurement specifications and test requirements – emphasize need for agreement
- Analyzing SV test data – frequencies, accelerations, displacements and velocities
Damage caused by SV testing
- Characterizing SV tests - vibration, drop tower, barge, hammer tests - videos and photos
- Review of overstress, fatigue, deterioration, degraded performance of COTS
- Measurement and data acquisition during tests, data analysis - interpretation - relevance to damage prediction
Selecting and using SV isolators
- Equipment design levels – example: COTS in equipment enclosures
- Isolator performance – showing how isolators work – demonstration videos
- Emphasize commercial passive mounts – introduce semi-active and active designs
- Types of mounts – varieties of isolators – manufacturers
- Comparison of isolator properties – elastomer vs. cable, others - stiffness, damping and loads
- Isolation system design – guidelines for selecting and locating mounts
Designing isolation systems
- Shipboard applications – different locations throughout various ship types
- Examples, features and design guidelines – design drawings, single and multiple cabinets
- Computer analysis of isolation system performance – sample calculations
- Calculation methods – FEA and modeling – videos and animations
- Use of Shock Response Spectra (SRS) – typical barge shocks – inputs and responses
- Validating results – barge and vibration test vs. predictions
Selecting electronic enclosures
- Performance requirements – design objectives, allowable SV loads, multiple directions
- Interaction of isolators and enclosures (single and multiple enclosures, workstations)
- Related aspects – rotational stiffness, sway space, airflow, access to COTS
- Equipment maintenance - replacement, upgrading of systems may require new isolators
- Proof of performance – past mistakes, what not to do
Selecting isolators and isolation systems (details)
- Matching isolator system to expected SV levels
- Isolator effectiveness – enclosure dynamics – non-linearity
- Isolators can exacerbate the problem – discussion and animations
- Examples of problems and solutions – photos, drawings
- SV analysis and examples – qualification by extension
- Avoiding retest and extra costs
Discussion of participants’ applications and projects
Design review by technical specialists
Course summary
Award of certificates
