Spacecraft Power Systems Spacecraft Power Systems Power Source
- Slides: 7
Spacecraft Power Systems
Spacecraft Power Systems • Power Source – Table 11 -33 compares common s/c power sources – Photovoltaic Cells • • Cell types Sizing (Peak and Average Power) Radiation Environment Thermal Environment Shadowing Mission life Degradation characteristics
Spacecraft Power Systems • Power Source – Radioactive Power Sources • Radioisotope Thermoelectric Generators (RTGs) • Nuclear Reactor – Dynamic Power Sources • Brayton, Stirling, Rankine cycles – Fuel Cells • Energy from oxidation reactions • High efficiency, short duration missions
Spacecraft Power Systems • Energy Storage – Physical Constraints • • Size Mass Operating position Static and dynamic environments – Programmatic Constraints • Cost • Mission – Power required, eclipse frequency and length • Reliability • Maintainability
Spacecraft Power Systems • Energy Storage – Electrical Constraints • • • Voltage Current Loading Duty cycles (length and frequency) Depth of discharge Activation time
Spacecraft Power Systems • Power Distribution – Cabling • 10 -25% of power system mass • Volume and location constraints – Fault Protection • Detection • Isolation • Correction – Switching • Subsystems require different amounts of power at different times • Power from batteries, arrays, RTG’s etc.
Spacecraft Power Systems • Power Regulation and Control – Peak Power Tracking (PPT) • Non-dissipative • DC-DC converter in series with solar arrays – Direct Energy Transfer (DET) • Dissipative • Shunt regulator in parallel with arrays
Spacecraft requirements management
Ac power formula
Etl metadata
Decision support systems and intelligent systems
Principles of complex systems for systems engineering
Embedded systems vs cyber physical systems
Engineering elegant systems: theory of systems engineering
Ibm power systems technical university
