并对模态函数的正交性作了相关探讨。
Discussion is made about the orthogonality conditions of the modal functions.
振动信号被分解为一系列固有模态函数。
The vibration signal is decomposed into a sum of intrinsic mode functions.
单元的变形用符合几何边界条件的模态函数来表示。
The deflection of the element is represented by a series of mode functions that satisfy the conditions at the boundaries.
利用快速滤波建立了一种对信号进行本征模态函数分解的全新方法。
A new method is introduced to decompose a signal into a set of IMFs (Intrinsic Mode Function) by virtue of fast band-pass filtering.
而本方法只基于实验数据可以同时提取内波模态函数及其模态系数。
But in this part, internal waves' mode functions and mode coefficients are extracting from experimental data at the same time.
讨论了经验模态分解方法及其在获取固有模态函数过程中的自适应滤波特性。
The EMD method and its adaptive filtering property in the process of obtaining the intrinsic mode function(IMF) were discussed.
对透平机械常用的叶轮的固有振动问题给出了一种试验与计算相结合求取其精确振动模态函数的方法。
This paper gives a method of combining experiment with theoretical calculus, which can be used to obtain the precious vibration mode functions of disk bladed of turbine machinery.
该方法的另一个重要特点是分解所得各本征模态函数及非模态函数是严格正交的，不会产生模态混淆。
Another merit is that IMFs and non-IMFs decomposed by the method are orthogonal each other and can prevent IMFs from mode confusing.
文中阐述了框架结构有限单元各阶动约束模态函数的概念，并用它组成结构有限单元各阶动态形函数矩阵。
The concept of dynamic constraint mode functions for elements of a frame is introduced and it is used to form the dynamic shape function matrixes of each order for the finite elements of a frame.
本文介绍了经验模态分解的方法与原理，给出了由经验模态分解产生的固有模态函数重构组合滤波器的原理与详细算法。
Firstly, the theory of empirical mode decomposition (EMD) is introduced, and the reconstructing and filtering algorithm of intrinsic mode functions (IMF) from EMD is given in this paper.
在分析三相四桥臂逆变器工作模态的基础上，引入开关状态函数建立了四桥臂逆变器系统离散的、非线性的数学模型。
A discrete and nonlinear mathematical model of three-phase four-leg inverter is built up with the switch state functions based on the analysis of its working modes.
在分析三相四桥臂逆变器工作模态的基础上，引入开关状态函数建立了四桥臂逆变器系统离散的、非线性的数学模型。
A discrete and nonlinear mathematical model of three-phase four-leg inverter is built up with the switch state functions based on the analysis of its working modes.
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