LoopyLuci Aerospace Systems Engineering
Overview
Design, develop, and validate safety-critical aerospace systems using systems engineering, risk management, and certification processes. Covers requirements engineering, system architecture, safety analysis (FMECA/HAZOP), testing/validation, and aerospace standards (DO-178C, DO-254, ARP4754A).
When to Use
- "Design aerospace flight control system"
- "Perform safety analysis for aircraft systems"
- "Plan DO-178C software certification"
- "Manage aerospace requirements traceability"
- "Test aerospace systems with fault injection"
Systems Engineering V-Model (ARP4754A)
V-Model: System Requirements → Architecture → Design → Implementation → Testing ← Verification ← Validation
Requirements Traceability
class AerospaceReqTraceability:
def __init__(self):
self.traceability_matrix = {}
def add_requirement(self, req_id, safety_level, source="DO-178C"):
"""
Add aerospace requirement with safety level (A-E)
"""
self.traceability_matrix[req_id] = {
"safety_level": safety_level, # A=Catastrophic, B=Hazardous, C=Major, D=Minor, E=None
"source": source,
"design_elements": [],
"test_cases": [],
"verification_method": None
}
Safety Analysis Methods
Functional Hazard Assessment (FHA)
| Condition | Level | Description |
|---|---|---|
| Catastrophic | A | Multiple fatalities |
| Hazardous | B | Serious injury |
| Major | C | Minor injury |
| Minor | D | Passenger discomfort |
Common Pitfalls
- Insufficient requirements traceability — no linkage from req to design to test
- Not addressing all hazard conditions — incomplete FHA analysis
- Wrong DO-178C level assignment — safety level misidentified
- Insufficient test coverage — especially MC/DC for Level A
- Poor configuration management — lost changes during development
- Not conducting peer reviews — required for all levels per DO-178C
- Inadequate safety margins — hardware margins too tight
- Not planning contingencies — off-nominal conditions not tested
- Skipping fault injection testing — latent failures undetected
- Not maintaining certification artifacts — audit trail gaps
Verification Checklist
- Requirements traceable per DO-178C
- FHA/FTA completed for all safety levels
- Test coverage meets software level (MC/DC for Level A)
- Configuration management system active
- Peer reviews documented per DO-178C
- Fault injection testing completed