Power Subsystem Trade Studies for a 5 kW MEO Application.
Abstract
A technology trade study for a large generic MEO spacecraft has been carried out. The objective of the study was to address the main factors related to a modern, but not cutting edge, spacecraft power system capable of acceptable reliability over a 10-year mission. A typical MEO orbit mission passes through the earth's radiation belts and exposes the spacecraft to high levels of natuaal radiation. This affects the power system in two ways: (1) the solar array wili be large and heavy, and (2) the power system electronics (as well as other onboard electronic systems) must use radiation-hard parts. Radiation-hard electronics are expensive. The spacecraft was assumed to have onboard control functions with ground control as a backup. Where feasible, hardware items were recommended and manufacturers identified that already have an established ground-based data base, and where applicable, also have an established flight history. Following a review of the issues and trades, recommendations are presented, along with supporting data. The technology issues and options related to modern nickel hydrogen cell and battery designs are reviewed. Solar cell and array trades are carried out and recommendations made, as affected by radiation considerations. Mission optimization was not performed as part of this study, although The Aerospace Corporation regularly performs this task for U. S. Air Force satellite programs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1995
- Accession Number
- ADA302375
Entities
People
- Albert H. Zimmerman
- B. J. Carter
- L. F. Halle
- L. H. Thaller
Organizations
- The Aerospace Corporation