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

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