提出研究一种适用于旋转机械频率可在线连续调节的笼式调谐质量阻尼器(Tuned Mass Damper,TMD),通过在线改变其悬臂杆有效长度可连续改变TMD的刚度,从而实现TMD频率的调节。该笼式TMD具有结构紧凑、刚度调整范围大等优点。建立转子-TMD...提出研究一种适用于旋转机械频率可在线连续调节的笼式调谐质量阻尼器(Tuned Mass Damper,TMD),通过在线改变其悬臂杆有效长度可连续改变TMD的刚度,从而实现TMD频率的调节。该笼式TMD具有结构紧凑、刚度调整范围大等优点。建立转子-TMD的有限元模型,设计基于转速的分段控制策略实现对该TMD的频率调节控制,仿真对比分析TMD在频率可控及不可控情况下对柔性转子过临界及在工作转速下的不平衡振动抑制效果,并设计相应的实验平台进行验证分析。仿真及实验结果均表明:基于转速的分段控制策略能实现在线控制TMD频率调节,有效控制柔性转子过临界及工作转速的不平衡振动,相对于被动型频率不可调TMD更具有优势,其减振效果明显,降幅高达90.8%。展开更多
The aim of this work is to analyze and design a control system for vibration reduction in a rotor system using a shear mode magnetorheological fluid(MRF)damper.A dynamic model of the MRF damper-rotor system was built ...The aim of this work is to analyze and design a control system for vibration reduction in a rotor system using a shear mode magnetorheological fluid(MRF)damper.A dynamic model of the MRF damper-rotor system was built and simulated in Matlab/Simulink to analyze the rotor vibration characteristics and the vibration reduction effect of the MRF damper.Based on the numerical simulation analysis,an optimizing control strategy using pattern search method was proposed and designed.The control system was constructed on a test rotor bench and experiment validations on the effectiveness of the proposed control strategy were conducted.Experimental results show that rotor vibration caused by unbalance can be well controlled whether in resonance region(70%)or in non-resonance region(30%).An irregular vibration amplitude jump can be suppressed with the optimization strategy.Furthermore,it is found that the rapidity of transient response and efficiency of optimizing technique depend on the pattern search step.The presented strategies and control system can be extended to multi-span(more than two or three spans)rotor system.It provides a powerful technical support for the extension and application in target and control for shafting vibration.展开更多
A control system aims at vibration reduction in a two-span rotor system with two shear mode magnetorheological （MRF） dampers is designed. A finite element model of the MRF damper- rotor system is built and used to a...A control system aims at vibration reduction in a two-span rotor system with two shear mode magnetorheological （MRF） dampers is designed. A finite element model of the MRF damper- rotor system is built and used to analyze the rotor vibration characteristics. Based on Hooke and Jeeves algorithm and the numerical simulation analysis, an optimal appropriate controller is proposed and designed. Experimental results show that rotor vibration caused by unbalance is well controlled （ first critical speed region 37% , second critical speed region 42% ）. To reflect advantages of optimi- zing strategy presented and validate the intelligent optimization control technology, detailed experi- ments were developed on a two-span rotor-vibration-control platform. The influence on accuracy, rapidity and stability of optimizing control for rotor vibration are analyzed. It provides a powerful technical support for the extension and application in target and control for shafting vibration.展开更多
文摘提出研究一种适用于旋转机械频率可在线连续调节的笼式调谐质量阻尼器(Tuned Mass Damper,TMD),通过在线改变其悬臂杆有效长度可连续改变TMD的刚度,从而实现TMD频率的调节。该笼式TMD具有结构紧凑、刚度调整范围大等优点。建立转子-TMD的有限元模型,设计基于转速的分段控制策略实现对该TMD的频率调节控制,仿真对比分析TMD在频率可控及不可控情况下对柔性转子过临界及在工作转速下的不平衡振动抑制效果,并设计相应的实验平台进行验证分析。仿真及实验结果均表明:基于转速的分段控制策略能实现在线控制TMD频率调节,有效控制柔性转子过临界及工作转速的不平衡振动,相对于被动型频率不可调TMD更具有优势,其减振效果明显,降幅高达90.8%。
基金Supported by the National Program on Key Basic Research Program(″973″Program)(2012CB026000)the Ph.D.Programs Foundation of Ministry of Education of China(20110010110009)
文摘The aim of this work is to analyze and design a control system for vibration reduction in a rotor system using a shear mode magnetorheological fluid(MRF)damper.A dynamic model of the MRF damper-rotor system was built and simulated in Matlab/Simulink to analyze the rotor vibration characteristics and the vibration reduction effect of the MRF damper.Based on the numerical simulation analysis,an optimizing control strategy using pattern search method was proposed and designed.The control system was constructed on a test rotor bench and experiment validations on the effectiveness of the proposed control strategy were conducted.Experimental results show that rotor vibration caused by unbalance can be well controlled whether in resonance region(70%)or in non-resonance region(30%).An irregular vibration amplitude jump can be suppressed with the optimization strategy.Furthermore,it is found that the rapidity of transient response and efficiency of optimizing technique depend on the pattern search step.The presented strategies and control system can be extended to multi-span(more than two or three spans)rotor system.It provides a powerful technical support for the extension and application in target and control for shafting vibration.
基金Supported by the National Program on Key Basic Research Project(973Program)(2012CB026000)Ph.D Programs Foundation of Ministry of Education of China(20110010110009)
文摘A control system aims at vibration reduction in a two-span rotor system with two shear mode magnetorheological （MRF） dampers is designed. A finite element model of the MRF damper- rotor system is built and used to analyze the rotor vibration characteristics. Based on Hooke and Jeeves algorithm and the numerical simulation analysis, an optimal appropriate controller is proposed and designed. Experimental results show that rotor vibration caused by unbalance is well controlled （ first critical speed region 37% , second critical speed region 42% ）. To reflect advantages of optimi- zing strategy presented and validate the intelligent optimization control technology, detailed experi- ments were developed on a two-span rotor-vibration-control platform. The influence on accuracy, rapidity and stability of optimizing control for rotor vibration are analyzed. It provides a powerful technical support for the extension and application in target and control for shafting vibration.
