Advanced Stirling Radioisotope Generator (ASRG)

Develop the Advanced Stirling Radioisotope Generator (ASRG)

Lockheed Martin Space Systems

Services Performed:
PEI provided design and structural analysis for the ASRG housing and internal components from preliminary design phase through fabrication of qualification test units.

Structural Analysis:

  • Generate system level finite element model using FEMAP software
  • Model analysis performed using NX/NASTRAN
  • Random vibration analysis with force limiting
  • Sine pulse analysis
  • Acoustic analysis on radiator fins and prototype shunt radiator
  • Modal analysis and model tuning and test correlation
  • Modal transient response analysis and study of Stirling engine synchronization
  • Fatigue and fracture analysis
  • Structural analysis of ceramic thermal insulation

Engineering Design (PTC Creo):

  • Mass model design
  • Preliminary design of spacecraft interface adapter
  • ASRG housing modifications to meet structural requirements
  • Stirling engine interface tube