摘要
研究了磁悬浮轴承柔性转子系统的振动控制。建立五自由度磁悬浮轴承转子系统的数学模型,提出了根据转子在固有频率处的振幅选择加权函数的方法,采用混合灵敏度H∞控制策略设计鲁棒控制器,利用matlab软件对系统进行了仿真分析,并通过系高速旋转试验进行验证。结果表明,在H∞控制器控制下,系统能稳定悬浮,并平稳越过前二阶临界转速,具有较强的鲁棒稳定性和抑制转子振动的能力。
The vibration control of an active magnetic bearing (AMB) flexible rotor system was studied. A 5-DOF mathematic model of the AMB rotor system was established firstly. Method for selecting weighted functions based on the vibration amplitude of the rotor at its natural frequencies was put forward. The H∞ controller of the system was designed according to the mixed-sensitivity method. The simulation analysis and the high rotating speed tests of the system were performed to validate the influence of the H∞ controller on the dynamic characteristics of the system. The results showed that the H∞ controller can reduce the vibration amplitude of the rotor and the system is robust.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第23期115-120,共6页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51275238)
航空科学基金资助项目(2011ZB52025)
江苏省高校优势学科建设工程资助
