多跨转子系统多频传递力主动控制  

Active control with multi-frequency transmission force of multi-span rotor system

作　　者：徐晖 祝长生[1] XU Hui;ZHU Chang-sheng(College of Electrical Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310058

出　　处：《浙江大学学报（工学版）》2020年第3期597-605,共9页Journal of Zhejiang University：Engineering Science

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

摘　　要：设计一种用于传递力控制的电磁执行器与滑动轴承组合的混合轴承,分析混合轴承的工作原理.采用有限单元法建立一个多盘多跨转子系统的动力学模型,分析圆盘处的扰动力和轴承处控制力对轴承传递力的影响.基于误差信号子带滤波理论提出一种由多个单频力控制器并联而成的变步长自适应控制算法.在MATLAB/Simulink平台上建立双跨转子系统传递力主动控制仿真模型并进行数值仿真.结果表明,提出的多频力控制方法可以对误差信号进行有效地滤波,能够对多跨转子系统的多频传递力进行有效地抑制.Firstly, a hybrid bearing, combining the electromagnetic actuator and journal bearing, was designed to control the multi-frequency transmission force in multi-span rotor system, and the operation principle was analyzed.Then, a dynamic model of the multi-span rotor system with multi-disc was built by the finite element method, and the influence of the disturbance force at the disc and the control force at the bearing on the transmission force was analyzed. Next, an iterative algorithm with variable step size was proposed based on sub-band filtering of error signal. Finally, the numerical model of multi-frequency forces transmitted to the base in two-span rotor system was built in MATLAB/Simulink platform and numerical simulations were carried out. The simulation results indicate that the proposed algorithm can effectively extract the error signal at different frequencies and suppress the multifrequency transmission force of multi-span rotor system.

关 键 词：多跨转子 混合轴承 多频传递力 子带滤波 变步长迭代 

分 类 号：TB535[理学—物理]