摘要
以8极结构的径向电磁轴承为研究对象,为了提高多绕组回路运行的整体可靠性,避免转子因悬浮失控而引发事故,提出了8极径向电磁轴承绕组容错控制方法。首先,当一个或多个绕组回路发生故障时,该方法遵循最小功耗的分配策略,将故障绕组的电磁力分配到其他正常绕组,维持转子基本的悬浮状态,为转子安全降速赢得时间,从而消除或减轻转子在高速悬浮失控造成事故的损失;其次,对可以实现容错控制的故障形式进行归类,每一种故障类型只需求解一个基本电流分配矩阵;最后,通过坐标变换矩阵和绕组重映射矩阵实现多绕组回路不同故障形式的容错控制。数值分析结果表明,该容错方法能有效减少绕组电流的能量消耗,简化容错控制过程,提高系统的可靠性。
The radial electromagnetic bearing with eight-pole structure was chosen as the research object. In order to improve the overall reliability of multi-winding loop operation and avoid the accident caused by the suspension out-of-control of the rotor, a fault tolerant control method for radial electromagnetic bearing with eight-pole structure was proposed. Firstly, in the event of a fault in one or more of the winding loops, the method follows the distribution strategy of minimum power dissipation and distributes electromagnetic force of faulty winding to other normal windings to maintain basic suspension state of rotor and gain time for safe speed reduction of rotor so as to eliminate or relieve the loss caused by uncontrolled suspension at a high speed. Secondly, all the failure modes that can achieve fault tolerant control are categorized. Each fault type only needs to solve one basic current distribution matrix. Finally, the fault tolerant control of different fault modes in a multi-winding loop can be achieved through coordinate transformation and winding remapping matrix. Numerical analysis results show that the fault tolerant method can effectively reduce energy consumption of winding current, simplify the fault tolerant control process and improve the system reliability.
作者
赵文洁
蒋科坚
ZHAO Wenjie;JIANG Kejian((School of Information Science and Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2019年第2期187-195,共9页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(11272288)
浙江省自然科学基金项目(LY18E050017)
关键词
主动电磁轴承
容错控制
电流分配矩阵
坐标变换
绕组重映射矩阵
active electromagnetic bearing
fault tolerant control
current distribution matrix
coordinate transformation
winding remapping matrix
