混合轴承多跨转子多频轴承传递力自适应控制  

Adaptive control of multi-frequency bearing transmission force of multispan rotors with hybrid bearings

作　　者：徐晖 祝长生[1] XU Hui;ZHU Chang-sheng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《振动工程学报》2021年第1期166-175,共10页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(11632015);国家基础预研项目(302030116-0659-001)。

摘　　要：介绍了一种基于电磁执行器动力特性可控的混合轴承结构;用有限元法建立了多跨转子系统的动力学模型,分析了转子通过轴承给基础的传递力及传递力控制的原理;基于自适应最小均方算法,提出了一种基于误差信号子带滤波,由多个单频力控制器并联而成的变步长自适应轴承传递力控制器;以双轴多跨转子系统为例对轴承传递力主动控制器的有效性进行了理论仿真。结果表明,提出的多跨转子系统多频轴承传递力主动控制方法可以有效地抑制转子系统对基础的传递力。When a rotor of a rotating machinery rotates,a multi-frequency force transmitted to the base of the bearings will be produced by electromagnetic,fluid and mechanical excitations.In order to control the multi-frequency bearing transmission force of the rotor system,a hybrid bearing with controllable dynamic characteristics by using an electromagnetic actuator is introduced.A dynamic model of a multi-span rotor system is built by the finite element method,the bearing transmission force and the control principle of bearing transmission force are discussed.Then a sub-band filtering through error signal and parallel implementation for every controlled frequency based variable step-size adaptive iterative transmission force controller is proposed to the FxLMS algorithm.Finally,numerical simulation in a two shaft multi-span rotor system is carried out to demonstrate the effectiveness of the variable step-size adaptive iterative transmission force controller.It is shown that the variable step-size adaptive iterative transmission force controller proposed can effectively suppress the multi-frequency bearing transmission force by adjusting the control force of electromagnetic actuators in real time.

关 键 词：多跨转子 自适应控制 电磁执行器 混合轴承 多频轴承传递力 

分 类 号：O347.6[理学—固体力学] TB535[理学—力学]