An Heritage Approach to Aerospace Risk Based Design: With ...
An Heritage Approach to Aerospace Risk Based Design: With ...
An Heritage Approach to Aerospace Risk Based Design: With ...
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<strong>Design</strong> Definition<br />
Good Reliability and<br />
Operability Principles<br />
•Simplicity<br />
•Robustness<br />
•Ease Of Maintenance<br />
Performance<br />
Model<br />
Reliability Model<br />
Requirements<br />
Definition<br />
No<br />
Catastrophic Frequency<br />
Event Scenarios<br />
Top Level<br />
Criteria<br />
Reliability<br />
Criteria<br />
Criteria<br />
Met?<br />
Top Level Criteria<br />
• Performance<br />
– Thrust/ISP/Thrust <strong>to</strong> Weight<br />
• Reliability<br />
– Catastrophic/ Shutdown<br />
• Maintainability<br />
– <strong>Design</strong> features - RCM<br />
• Operability<br />
– Cost/ Time per Turnaround<br />
Yes<br />
Operability<br />
<strong>An</strong>alysis<br />
Eliminate Scenario, or Failure Mode<br />
No<br />
Mitigation<br />
Preferred<br />
Necessary<br />
Reliability Optimization <strong>Design</strong> Loop – Is it Reliable Enough?<br />
• Reliability model is based on heritage where possible<br />
• <strong>Heritage</strong> is extended using probabilistic stress analysis <strong>to</strong> determine robustness<br />
• Fault <strong>to</strong>lerance and redundancy are analyzed from system configuration<br />
• If reliability requirements are not met, increase design margins and re-calculate performance<br />
• If new design margins cause performance requirements <strong>to</strong> be overly compromised identify mitigation<br />
strategies<br />
28-29 Oc<strong>to</strong>ber 2002<br />
Slide 5 of 42<br />
A <strong>Heritage</strong> <strong>Approach</strong> <strong>to</strong> <strong>Aerospace</strong> <strong>Risk</strong> <strong>Based</strong> <strong>Design</strong>: <strong>With</strong> Application<br />
Day 1 Afternoon
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