大型水电机组轴系统的MRD模糊振动控制  

MRD fuzzy vibration control of the large-scale hydro-generator shafting

作　　者：孙万泉[1] 张宁[1] SUN Wan-quan;ZHANG Ning(School of Water Resources and Hydropower Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学水利与水电工程学院,北京102206

出　　处：《振动工程学报》2020年第6期1263-1271,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51579100)。

摘　　要：为减小水电机组振动和提高整个系统运行的稳定性,提出利用磁流变液阻尼器(MRD)开展对大型水电机组的主动振动控制研究。在相关磁流变液阻尼器实验研究和理论研究的基础上,利用模糊控制处理复杂系统的优越性,建立了机组轴系统的MRD模糊振动控制模型。并通过将自适应机构与模糊逻辑控制器相结合,提出了一种基于系统振幅的变量化因子的自适应模糊控制策略,利用MATLAB模拟验证了其有效性。结果证明:该控制策略有效抑制了水电机组轴系统的非线性振动,降低了不同运行工况下的系统振幅。与恒定电流下的MRD被动控制相比,自适应模糊控制的MRD阻尼器的能量耗散能力更高,对系统振幅的控制效果更为显著。In order to reduce the vibration of the hydropower unit and improve the stability of the whole system operation,the active vibration control of the large hydropower unit is proposed by using magnetorheological fluid damper(MRD).Based on the experimental and theoretical research of related magnetorheological fluid dampers,the fuzzy control of complex systems is used to establish the MRD fuzzy vibration control model of the unit shaft system.An adaptive fuzzy control strategy based on the variable factor of the system amplitude is proposed by combining the adaptive mechanism with the fuzzy logic controller,and its effectiveness is verified by MATLAB simulation.The result shows that the control strategy effectively suppresses the nonlinear vibration of the hydropower unit shafting system and reduces the system amplitude under different operating conditions.Compared with the passive control using MRD under constant current,the energy dissipation capacity of the adaptive fuzzy control MRD is more improved,and the control effect on the system amplitude is more significant.

关 键 词：振动控制 水电机组 磁流变液阻尼器(MRD) 自适应模糊控制 非线性振动 

分 类 号：TB535[理学—物理] TK730.32[理学—声学]