离散系统变结构控制理论及其在电力电子装置中的应用

【作者】 周靖林；

【导师】 肖雁鸿；

【作者基本信息】 湖南大学 ， 电力电子与电力传动， 2002， 硕士

【摘要】 本文探讨了离散系统的变结构控制及其在电力电子装置中的应用。论文首先简要地回顾了连续系统的变结构控制，然后分析了将连续系统的变结构控制离散化后应用在离散系统时采样时间选取的问题；论述了直接针对离散系统的变结构控制的一些常用的方法，改进了离散变结构控制的等式到达条件；在此基础上，提出了一类新的离散系统的趋近律方法——衰减变速趋近律，并从理论上证明了它是一种无抖振的趋近律，通过仿真验证理论的正确性。同时，阐述了离散系统变结构无抖振控制的设计方法。论文重点讨论了离散系统鲁棒变结构控制方法，特别是应用离散衰减变速趋近律实现的鲁棒控制策略。最后讨论了离散变结构控制在电力电子装置中的应用实例及对离散变结构控制的发展方向作了展望。更多还原

【Abstract】 Variable structure control of discrete-time systems and its applications in power electronic apparatus are discussed in this paper. At first, variable structure control of continuous-time systems is reviewed briefly. After that, the problem of choosing sample time in the discretized variable structure control of continuous-time systems is analyzed. Some common methods of variable structure control for the discrete-time system are dissertated, and the discrete equation reaching conditions are improved . A new reaching law based on attenuating variable rate control which is verified as a chattering-free reaching law in theory is presented and its’ correctness is validated by simulation. Meanwhile, design methods of chattering-free in the discrete-time systems are expounded and the strategies of robust control for the discrete-time variable structure control systems are discussed in emphasize, especially the robust discrete-time variable structure control strategy with the reaching law based on discrete attenuating rate control . In the end, some applications in the power electronic apparatus with the discrete-time variable structure control are introduced. The future development for the discrete-time variable structure control systems is also provided.更多还原