碩士生: 黃丙翰
畢業年月: 2023年1月
論文名稱: 並列電極陣列式真空陰極電弧推進器之研發、設計與測試 / The development, design and demonstration of vacuum cathode arc thruster with parallel electrode array
中文摘要:
本研究開發適用於立方衛星的電力推進系統；因立方衛星體積小、重量輕且電力有限，故選擇真空電弧推進器進行研發與改良。研究提出「並列電極陣列式真空陰極電弧推進器」新概念，由多個推進單元組合，預期由誘發電極放電觸發主電極放電，並已成功點火。此概念改善傳統推進器因導電石墨層反覆附著而導致效率下降的問題，同時提出利用「三相點」現象的「多層絕緣層」，取代石墨層與絕緣體，使擊穿電壓低於真空條件並提升穩定性與耐久性。研究亦改善電感儲能裝置，並以快速法拉第杯與示波器量測各項參數。所製推進器每發衝量達50.867 μN·s、比衝849.51 s、效率22.8%、推力功率比57.6 μN/W。
英文摘要:
This thesis develops an electric propulsion system for CubeSats, whose small volume, low mass, and limited power favor a vacuum arc thruster. A new "parallel electrode array" vacuum cathode arc thruster combines several propulsion units, with discharge of the inducing electrode expected to trigger the main electrode, and tests confirm that it ignites successfully. The concept counters the efficiency loss caused by conductive graphite repeatedly redepositing in conventional thrusters, and a "multi-layer insulation" design exploiting the triple-point effect replaces the graphite layer and insulator, lowering breakdown voltage compared with vacuum while improving stability and durability. The inductive energy storage unit was also improved, and a fast Faraday cup and oscilloscope were used for diagnostics. The thruster delivered an impulse bit of 50.867 μN·s per pulse, a specific impulse of 849.51 s, an efficiency of 22.8%, and a thrust-to-power ratio of 57.6 μN/W.
