In this paper , there are introducing the analysis and calculate of the rotor vibration theory . the shaft kinetic analysis of pm15 - gm ( rice mill ) is done by ansys 5 . 7 , its structural dynamic character and vibration state is calculated 本文首先综合介绍了分析、计算转子振动及振动机理的方法，并利用临界转速的有限元法，采用ansys软件对pm15 ?抛光米机主轴进行了动力学分析，得出了该机型主轴的动力特性及振动状态。
Combined with a virtual simulation system of peripheral milling process and cutting force signal obtained in cutting trials , an optimal bp neural network model with 1 - 20 - 1 structure that can be used rapidly to predict vibration in peripheral milling process is trained and established 摘要结合研制的立铣加工过程虚拟仿真系统和实验测量铣削力信号，训练并建立优化的1 - 20 - 1型bp神经网络模型，快速实现铣削加工过程刀具工件系统振动状态的预估。
In this thesis , the necessity of exerting the condition monitoring of the high voltage circuit breaker is discoursed , and the vibrant condition monitoring is researched and discussed . stft ( short - time fourier transform ) method is utilized to analyze the vibrant signal comparing with other analysis methods 本文论述了实施高压断路器状态监测的必要性，对断路器振动状态监测做了探讨和研究，通过分析比较，选用短时傅立叶变换作为振动信号的分析方法。
The realization of the long - distance monitoring condition and diagnosing fault depends on the network communication , database technique , and web technique and software development tools , so chapter three discusses the computer technology relative to the long - distance monitoring condition and diagnosing fault . six mam aspects of system of long - distance monitoring condition and diagnosing fault are presented in chapter four 大型汽轮发电机组振动状态远程监测与故障诊断系统的实现必须依靠网络通信、数据库技术、 web技术以及系统开发平台等技术，所以本文的第三章就主要讲述与远程监测和故障诊断系统相关的计算机技术。
With the increasing capacity of steam turbine generator - set and the complexity of its structure , the relations among components are getting closer than ever . although the causes resulting in a machine set ' s vibration become more various and complex , the vibrant state is still a very important indication to judge the working conditions of machine set 随着汽轮发电机组容量不断增大，结构越来越复杂，各个零部件之间的联系更加紧密，虽然引起机组振动的原因也更趋多样化，复杂化，但振动状态仍是衡量机组运行状况好坏的一个重要标志。
The estimation results of vibration displacement obtained from the bp neural network model have a good agreement with the experimental results , which reveals that neural network technique combined with the virtual simulation system can be used effectively to predict and monitor vibration in peripheral milling process under different cutting parameters 对比神经网络模型预估的振动结果与实验测量振动信号可以看出，二者数据吻合较好，表明铣削虚拟仿真系统与神经网络技术的结合能够高效低耗地用于不同铣削加工条件下铣削振动状态的快速预估和加工过程监测。
The paper studied controlling rotor vibration with the super - elasticity of sma and sfd , set up the new equation of sys tern vibration according to the stress - strain curve of sma in super - elasticity state , used the nonlinear theory and the dynamic stability theory to study the vibration of rotor controlled by sma , discussed the stability condition of the system , obtained the relationship of system parameters when bifurcation was appeared , supposed a method that improves the stability of rotor system and restrains vibration amplitude though changing parameters , and finally validated the effect of restraining vibration of the improved system through emulation 摘要研究利用形状记忆合金的超弹性和挤压油膜阻尼器控制转子振动，利用形状记忆合金在超弹性状态下的应力应变曲线，建立了新的系统振动方程，运用非线性理论和运动稳定性理论研究转子在形状记忆合金控制下的振动状态，讨论了系统的稳定性条件，获得系统发生分岔时系统参数之间的关系；并提出了通过改变参数来提高系统稳定性和抑制振幅的方法，最后通过仿真验证了改进后的系统振动抑制效果。
In this thesis the development of noncontact monitoring blade vibration in china and other countries is summarized , the mathematical model of measuring blade vibration is presented , the monitoring system of blade vibration parameters in steam turbine is manufactured , and the theory of fuzzy diagnosis and the technology of multi - scale analysis are used to research fault blade 本文综合国内外叶片振动非接触测量技术的发展，给出了叶片动态测量的数学模型，研制了汽轮机叶片振动状态监测系统，用模糊诊断理论和多分辨率小波分析技术对叶片故障机理进行了研究。
In order to get the vibration information of computerized embroidery machine , failure - energy theory and perpendicular wavelet package method are applied to the modal ga920 , the character energy vector is gotten and a new method of failure identification is found 摘要为得到电脑刺绣机在不同振动状态的准确信息，应用“故障能量”的理论和正交小波包变换的方法对ga920型电脑刺绣机主横梁的振动信号进行分析，得到了不同振动状态的能量向量，为电脑刺绣机的故障诊断提供了一种新的解决方法。
In view of the deviation problem existed in the measurement of inclinationangle sensed by the servoaccelerometer in vibration state , two different methods of antivibration are utilized to reduce the measurement deviations . the experimental work shows that the application of some soft foaming material in the antivibration of sercoaccelerometer is quite effective 针对伺服加速度计在振动状态下倾角传感测量出现偏差的问题,采用了两种减振方案来减少这个测量偏差.实验研究表明,使用软性发泡材料减振是一种行之有效的方法
