1) frequency coupling feature
频率耦合特征
1.
Quadratic frequency coupling feature radiated by actual nonlinear vibration system can be extracted using third order cumulants.
非线性振动系统产生的二次频率耦合特征能用三阶累积量提取,三次频率耦合特征、双对频率耦合特征能用四阶累积量提取,高于三次的频率耦合特征的提取,未见报道。
2) higher order frequency coupling feature
高次频率耦合特征
1.
For extracting higher order frequency coupling feature radiated by actual nonlinear vibration system via odd-order cumulants(OOC),quartic frequency coupling and quadratic-to-cubic frequency coupling were firstly defined,OOC features analyzed,the relation between OOC calculation method and its computational load was studied.
为了用奇数阶累积量提取非线性振动系统的高次频率耦合特征,定义了四次频率耦合、二三对频率耦合等高次耦合新概念,分析了奇数阶累积量特征,研究了奇数阶累积量计算方法与计算量间的关系,提出了奇数阶累积量计算优化算法,该算法将奇数阶累积量的直接估计变为递推估计,将奇数阶累积量的多维运算转化为一维运算,大幅度减小了计算量,在工程上具有可实现性。
3) frequency coupling
频率耦合
1.
Using FFT (fast Fourier transfer) to study the frequency coupling effect, we get the results about coupling effects of the frequency of vorticity naturally shedding and the frequency of circular cylinder rotationally oscillating at low Reynold number.
进而说明了在不同频率耦合区域流场涡形成、发展和脱落的规
4) coupling frequency
耦合频率
5) characteristic frequency
特征频率
1.
Reasonable choice of characteristic frequency in eddy current detection for pressure pipeline;
涡流检测压力管道时特征频率的合理选择
2.
Calculation of characteristic frequency for inspection of pressure pipeline by spot probe;
压力管道在采用放置式探头探测时的特征频率选取
3.
The characteristic frequency of the elastic random medium models;
弹性随机介质模型的特征频率
6) Eigenfrequency
['aiɡən,fri:kwənsi]
特征频率
1.
In addition, it explicated how to calculate the eigenfrequency based on a wavelet transform.
广义的小波分析包括多分辨率分析和小波包分析,本文采用小波分解和信号重构的方法,提起了噪声掩盖下滚动轴承振动信号中的故障信息,并计算出 406滚动轴承外圈故障下的故障特征频率,通过对比由公式求取的故障特征频率,从而对滚动轴承的故障进行诊断。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条