1) time_varying modolfrequency identification
时变模态频率辨识
2) frequency identification
频率辨识
1.
Based on non-contact vibration measuring technique of blade tip-timing, "5 + 2" scheme of doublesam-pling rates is adoped to solve the under-sampling problem of asynchronous blade vibration, and by using frequency identification , blade s real vibration can be picked up.
基于非接触式叶尖定时测振原理,针对叶片异步振动的欠采样问题,采用"5+2"双采样速率方案进行采样,通过频率辨识技术来获得叶片的真实振动。
3) modal identification
模态辨识
1.
Experimental results show that the proposed model effectively eliminates the cross interference of oil/water emulsion modal,temperature and salinity content,overcomes the nonlinearity of sensor itself,realizes the modal identification of oil-water mixture via fuzzy reasoning and self-learning,and adjusts the model parameters by changing working conditions adaptively.
实验结果表明,该模型在很大程度上解决了油水乳化液模态、温度、矿化度等因素的交叉影响及传感器自身非线性的校正问题,可通过模糊推理与自学习实现油水混合模态辨识,并根据工况的变化调整测量模型参数,有效地提高了原油含水率宽量程在线智能测量的精度。
4) identification of mode frequency
模态频率识别
5) time-frequency resolution
时频分辨率
1.
Simulation results of several signal models demonstrate that NWST can reflect the spectral energy distribution of different frequency components while maintaining the good time-frequency resolution.
模型信号的分析表明,归一化窗S变换在不损失时频分辨率的前提下,更能客观地反映非平稳信号中不同频率成分的能量分布特征,并可通过参数调整其时频分辨率。
6) Time-frequency domain parameters identification
时频域参数辨识
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