磁悬浮储能飞轮振动状态监测研究
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摘要
针对磁悬浮储能飞轮系统的不平衡振动会影响转子稳定运转和系统正常工作的问题,对其扰动原因进行研究。通过建立含有转子不平衡量的广义干扰方程和磁悬浮飞轮动力学方程,对不平衡振动中的同频、倍频及模态分量进行理论分析。设计并实现了一套基于Lab VIEW-DAQ的磁悬浮飞轮振动状态监测系统,完成对储能飞轮振动信号的实时采集、处理和显示,实现了飞轮的振动状态监测,并对一台300 k W储能飞轮进行试验验证。针对储能飞轮工作的强电环境引起的信号噪声,对原始信号进行小波阈值消噪处理。对消噪后的振动信号进行频域分析,获取某一转速下飞轮的振动频谱图和不同转速下飞轮振动信号的三维瀑布图。试验结果表明,该飞轮振动频谱中存在稳定的飞轮旋转频率成分及其倍频分量。该系统操作简单,通用性强,具有一定的市场前景和应用价值。
In magnetic levitation energy storage flywheel system,the unbalanced vibration may influence the stability of the rotor and the normal operation of system; aiming at these problems,the reasons of the disturbance are studied. Through establishing the generalized disturbance equation containing unbalance quantity of rotor,and the dynamics equation of magnetic levitation flywheel,the theoretical analysis of the same frequency,double frequency and modal components in the unbalance vibration is carried out. A vibration condition monitoring system based on Lab VIEW-DAQ for the magnetic levitation flywheel is designed and implemented. With this system,real-time acquisition,processing and display of the flywheel vibration signal can be completed,and the vibration condition monitoring of flywheel is implemented,and the experimental verification for a certain300 k W energy storage flywheel is conducted. Aiming at the signal noise caused by the strong electric working environment of flywheel,the original signals are processed with wavelet threshold denosing,and the frequency domain syslysis is accomplished for the vibration signal after denoising,to obtain the vibration spectrum of the flywheel at a certain speed; and the three dimensional waterfall diagram of flywheel vibration signal under different speeds. The experimental results show that in the vibration spectrum of the flywheel,both the stable flywheel rotating frequency component and the double frequency component exist. The system is simple and versatile,so it has good market prospect and application value.
In magnetic levitation energy storage flywheel system,the unbalanced vibration may influence the stability of the rotor and the normal operation of system; aiming at these problems,the reasons of the disturbance are studied. Through establishing the generalized disturbance equation containing unbalance quantity of rotor,and the dynamics equation of magnetic levitation flywheel,the theoretical analysis of the same frequency,double frequency and modal components in the unbalance vibration is carried out. A vibration condition monitoring system based on Lab VIEW-DAQ for the magnetic levitation flywheel is designed and implemented. With this system,real-time acquisition,processing and display of the flywheel vibration signal can be completed,and the vibration condition monitoring of flywheel is implemented,and the experimental verification for a certain300 k W energy storage flywheel is conducted. Aiming at the signal noise caused by the strong electric working environment of flywheel,the original signals are processed with wavelet threshold denosing,and the frequency domain syslysis is accomplished for the vibration signal after denoising,to obtain the vibration spectrum of the flywheel at a certain speed; and the three dimensional waterfall diagram of flywheel vibration signal under different speeds. The experimental results show that in the vibration spectrum of the flywheel,both the stable flywheel rotating frequency component and the double frequency component exist. The system is simple and versatile,so it has good market prospect and application value.
引文
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[2]润章,朱熀秋,朱利东.磁悬浮飞轮轴向混合磁轴承参数设计及分析[J].机械设计与研究,2015,31(1):39-43.
[3]TANIWAKI S,OHKAMI Y.Experimental and numerical analysis of reaction wheel disturbances[J].JSME International Journal,2003,46(2):519-526.
[4]OH H S,CHEON D I.Precision measurements of reaction wheel disturbances with frequency compensation process[J].Journal of Mechanical Science and Technology,2005,19(1):136-143.
[5]陈峻峰,刘昆,梁文杰,等.磁悬浮飞轮储能系统机电耦合非线性动力学研究[J].动力学与控制学报,2013,11(3):225-234.
[6]刘彬,房建成,刘刚,等.磁悬浮飞轮不平衡振动控制方法与试验研究[J].机械工程学报,2010,46(12):188-194.
[7]王全武,虎刚.飞轮振动频谱特征的初步理论分析和验证[J].空间控制技术与应用,2008,34(4):42-46.
[8]臧孝华,王全武.振动测试技术在飞轮动平衡调整中的应用[J].新技术新工艺,2013(1):51-53.
[9]王光军,胡万明.高速回转机械振动产生的原因、测试标准与防治[J].氯碱工业,2006(5):44-44.
[10]王平,杨涛,侯守全,等.Lab VIEW中DAQ数据采集系统设计[J].自动化仪表,2015,36(7):31-33.
[11]朱希安.小波分析及其在数字图像处理中的应用[M].北京:电子工业出版社,2012:88-95.
[12]刘小群,周云波.基于Matlab的DFT及FFT频谱分析[J].山西电子技术,2010(4):48-49.
[13]梅海青,冯毅.基于振动信号频谱分析的回转机械故障诊断方法[J].流体机械,2003,31(1):29-31.