适用于磁悬浮轴承系统的多桥臂开关功放控制策略、故障预测及容错控制研究

适用于磁悬浮轴承系统的多桥臂开关功放具有结构集成、低成本等特点，是现代磁悬浮轴承技术研究的重点和发展趋势。本项目从控制策略、故障预测及容错控制三个方面，对磁悬浮轴承的多桥臂开关功放控制系统开展研究。研究内容包括：研究先进有效的多桥臂开关功放数字控制方法，解决负载相电流间的耦合问题；在理想与实际工作条件下，对系统的故障特征参数的提取方法开展研究，研究系统的故障预测算法，改进系统性能；研究新型的具有容错能力的拓扑结构，研究多桥臂开关功放容错控制的方法，提高系统可靠性。本项目将研制具有容错特性的五相六桥臂开关功放原理样机，探索和实现先进控制策略、故障预测及容错控制算法。

Because of the advantages of structure integration, low cost and so on, the multi-leg switching power amplifier system (SPAS) is the key and research trend for Magnetic Bearing. This proposal focuses on SPAS research from three categories of control strategy, fault prognostics and fault-tolerant control. Firstly the digital control method for SPAS is explored for decoupling the load-current loops. Secondly based on the recognition of fault symbols the algorithm for fault prognostics is developed to improve the SPAS property. Lastly method and topology of fault-tolerant control are put forward to improve the system reliability. This project will design and manufacture the prototype of five-phase six-leg SPAS with fault-tolerant capability, explore and advance control strategy, implement fault prognostics and fault-tolerant control.