To insure the reliability of a 20 kHz, AC power system on spacecraft, it is essential to analyze its behavior under many adverse operating conditions. Some of these conditions include overloads, short circuits, switching surges, and harmonic distortions. Harmonic distortions can cause malfunctions in equipment that the power system is supplying, and during extreme distortions such as voltage resonance, it can cause equipment and insulation failures due to the extreme peak voltages. HARMFLO, a power flow computer program, which was capable of analyzing harmonic conditions on three phase, balanced, 60 Hz, AC power systems, was modified to analyze single phase, 20 kHz, AC power systems. Since almost all of the equipment used on spacecraft power systems is electrically different from equipment used on terrestrial power systems, it was also necessary to develop mathematical models for the equipment to be used on the spacecraft. The results are that (1) the harmonic power now has a model of a single phase, voltage controlled, full wave rectifier; and (2) HARMFLO was ported to the SUN workstation platform. Kraft, L. Alan Unspecified Center NAG3-1254...

NASAが紡ぐ本作は、極限の宇宙環境において「調和」を追求する執念が詰まった至高のドキュメントです。電力システムの歪みというカオスに立ち向かうその姿勢には、科学の枠を超えた一種の叙事詩的な重みが宿っています。数式とコードの連なりの中に、人智の及ばぬ暗闇で秩序を維持しようとする人類の果てなき知性への信頼が、冷徹なまでの筆致で刻まれています。 地上の常識を脱ぎ捨て、未知の物理条件に合わせて数学的モデルを再構築していくプロセスは、さながら過酷な異世界に適応していく生命の進化を思わせる凄みがあります。実用性の極致にあるテキストだからこそ、宇宙という巨大な空白に一本の確かな回路を通そうとする技術者たちの情熱と、静謐なまでのストイシズムが読む者の心を激しく揺さぶるのです。