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- The rotor-stator contact problem can be detected by monitoring the torsional vibration signals. 提出了从转子扭转振动的变化来诊断转静碰摩故障的方法,并探讨了此方法的可行性和有效性。
- Spectrum peaks were found in the lower frequency area of the vibration signals obtained from the compressor set. 摘要分析某压缩机组振动信号的频谱发现低频处具有较高的谱峰。
- Vibration signals collected from an automobile gearbox with an incipient tooth crack areused in the investigation. 研究中用到了从带初始齿裂纹的汽车变速箱中采集的震动信号。
- The experimental research results show that the method under discussion can effectively diagnose the vibration signals of a centrifugal pump. 实验研究结果表明,该方法可以有效地对离心泵振动信号进行诊断。
- Considering rotation machines like a motor, the vibration signals are of universal nonstationarity and the fault samples are usually very limited. 旋转机械如电机振动信号普遍存在非平稳性,同时对于某台设备已有的故障样本往往非常有限的。
- In complicated frequency components domain, wavelet scalogram and assigned wavelet scalogram were used to further analyze vibration signals. 在频率成分较复杂的地方,利用小波尺度图和再分配小波尺度图进行细化分析。
- This paper introduces a full period sampling method based on the resampling technology used in the sampling of rotor system vibration signals. 介绍了一种应用重采样技术的旋转机械振动信号的整周期采样方法。
- As a new method, VQ is introduced to vibration detecting method of slag on the basis of the ananysis of large amount of vibration signals. 在分析大量浇铸机构振动信号的基础上,创造性地把矢量量化技术引入钢水浇铸的下渣识别中。
- I also make the turbogenerator rubbing type of fault mechanism and the characteristics of vibration signals a certain understanding. 同时也使我对汽轮发电机组碰摩类故障的机理及其振动信号的特征有了一定的了解。
- Extensive experiments on rotor laboratorial platform show that the implementation meets the requirement of vibration signals analysis. 在转子实验台上的实验证明,该方法能够完全满足振动信号分析的要求,是非常有效和切实可行的。
- The power spectral density of gearbox vibration signals is estimated by the periodogram from which original feature sets are derived. 为了使诊断结果更好地可视化,利用遗传编程结果的固有随机性,提取两个新特征指标。
- The result of the application indicates that the characteristics of gear fault vibration signals can be extracted by EMD method efficiently. 研究结果表明,EMD方法可以有效地提取齿轮故障振动信号的特征。
- The AE signals from rolling bearing were processed by high-pass filter and demodulation and compared with vibration signals. 把声发射信号与振动信号作对比,通过高通滤波后再进行包络解调,结果表明声发射信号可以较早地诊断出故障,抗干扰性好。
- The feature extraction and separation of vibration signals from mechanical faults are the most important and key steps in mechanical vibration diagnosis. 在机械故障的振动信号分析诊断中,故障特征信号的分离和提取是最重要和最关键的步骤之一。
- As for some of the unsteady vibration signals of diesel engine, false result may be provided by using Fourier analysis, thus error diagnosis would be induced. 传统的振动分析常采用傅立叶分析法,对于柴油发动机某些非平稳振动信号,傅立叶分析可能给出虚假的结果,从而导致错误诊断。
- Based on the correlation principle, an algorithm to decomposite the damped free vibration signals of a two degrees of freedom system with close natural frequencies is put forward. 摘要基于单一频率成分的自由衰减振动响应信号的相关性原理,提出了一种频率密集成分的两耦合振子自由衰减振动响应信号的解耦算法。
- The deconvolution between cylinder pressure signal and head bolt vibration signal was analyzed. 摘要研究了发动机气缸压力信号与表面振动响应信号之间的反卷积关系;
- In this method, vibration signals are decomposed by wavelet packet, and the wavelet packet coefficient is dc-noised by singular value decomposition again. 该方法将输入信号进行一次小波包分解,利用奇异值分解方法对分解后的幅值量化系数进行降噪。
- Base on that,the application of wavelet transformation in fault diagnosis to analyse nonstationarity of roller bearing vibration signals with Daubieches wavelet is introduced. 针对轴承振动的非平稳性特点和频谱成分的混杂性,提出了基于小波的信号自适应阈值降噪法。
- The piecewise self-affine fractal model was explored for data coding and reconstruction of vibration signal. 提出了用于对振动信号进行编码及重构的分段自仿射模型。