順滑模態理論在混成式磁浮系統零電流控制上之應用

Abstract

磁浮系統具有無摩擦接觸、低磨損、且易維護之特性。 舉凡：大眾捷運 、馬達軸承、無塵室等，都是其應用範圍。 由於高磁能積永久磁鐵之突 破及商用化，使得吾人可藉由適當的控制，達到提高升力對磁鐵重量的比 值和近零功率損耗等目的。 此外，高溫超導、電子電力等技術的持續進 步，更加速了磁浮技術之進展。不穩定之吸引式磁浮系統，必須藉由迴授 控制來維持其懸浮。 本論文利用順滑模態理論來設計控制器；此控制器 具備高強健性且適用於非線性系統，相當合於磁浮系統的模式特點，因此 可預期達到控制上的效果。 此外，本論文提出模式追隨的順滑模態控制 法則，來改良其暫態響應，並以模擬之結果來做驗證。 Magnetic levitation system have these advantages such as friction-less, low rub, and maintain-free. Its applications can cover these field of mass transportation, motor bearing, etc. Due to the recent advent of the rare-earth high-energy-product permanent magnet, it has become feasible to control a MAGLEV system using hybrid magnet with near-zero current dissipation. This paper proposes a sliding-mode control algorithm applied to the zero-power control of a hybrid magnetic levitation system. The controller designed here is highly robust and suitable for control of systems with heavy nonlinearity, which characterizes the MEGLEV system. Therefore, expected control performance could be attained. In addition, model following sliding-mode control algorithm is proposed to improve the transient response and the effects are demonstrated by simulation results.