本文提出了一种“谐波组清除算法”来估计周期信号的参数。
In this paper, we present a "harmonic group clean algorithm" to obtain the estimation of the parameters of the periodic signal.
利用FFT变换进行谐波分析，非整周期采样会带来较大的误差。
Non integer period Sampling leads to large error in harmonic analysis by FFT.
采用变异率指标与谐波分析法研究了1978-2000年水产品年度收购价格波动的周期性。
The fluctuation circle of aquatic products price between 1978 and 2000 via ratio of variation and harmonic wave was researched.
本文研究了用与受迫力谐波共振的周期摄动抑制含二次非线性项受迫振动系统中的混沌。
In this paper, suppression of chaos in a forced vibration system with a square term by resonant periodic perturbations is studied.
数值计算得到了转子系统在特定参数范围内的分叉图，系统存在亚谐波、概周期和混沌等非协调运动。
The diagrams of bifurcation, sub-harmonic, quasi-periodic and chaotic motion with typical parameters are numerically created.
但是，如果改进谐波的数据则在一个周期内可以形成多次打开关闭。
However, if turned on several times in a cycle an improved harmonic profile may be achieved.
快速傅里叶变换在非同步采样和非整数周期截断的情况下存在较大误差，无法获得较精确的间谐波参数值。
The fast Fourier transform (FFT) will bring on higher error under nonsynchronous sampling and truncated non-integral period, thus more accurate interharmonic parameter values cannot be obtained.
基于周期性槽孔结构的空间谐波的分析，讨论了抑制高次谐波以拓展使用频带的方法。
Based on the analysis of spatial harmonics of periodically slotted structure the method for extending operation frequency-band through suppressing higher-order harmonics is discussed.
提出了一种精确有效的数值算法，用以确定谐波激励下的分段线性振子的周期运动。
This paper presents an efficient numerical scheme for calculating the periodic motion of a harmonically forced piecewise linear oscillator very accurately.
在整周期采样的FFT算法的基础上，提出了确定基波周期的总谐波畸变(THD)最小的方法，并作了误差分析。
Based on the integer period sample FFT algorithm, a lowest total harmonic distortion (THD) method for determining the base period is proposed in this paper, and the derivation is theoretically given.
还指出了在非正弦周期性激励下，可结合“谐波分析”运用此法。
Furthermore, that the method may be used for non-sinusoidal periodic excitation is indicated.
研究结果发现，组合共振区域内发生两种不同的拟周期运动和组合周期运动，而且第一振型次谐波共振曲线延伸到组合共振区域。
The results obtained show that several motions may occur in the region of combination resonance, including two kinds of quasi-periodic vibrations and combined periodic motion.
利用谐波平衡法研究了局部非线性系统在周期激励下的稳态响应问题。
In this paper, the harmonic balance method has been developed for calculating the steady state response of locally nonlinear dynamic systems under periodic excitation.
在语音信号序列中影响语音表达速度的是浊音，它是基音，是由多次谐波构成的准周期信号。
Expressing speed of speech is influenced by a voiced sound in a vocal signal sequence. A vocal signal sequence is treated as that is formed by piling up pitch periods after varying integer delay time.
在分析周期运动的稳定性时，采用谐波平衡方法，得到转子周期运动的稳定条件，为工程设计提供了一定的依据。
To study the stability of periodic motions the harmonic balance method is used. The condition for the stability of periodic motions can provide a theoretical basis for the design of rotor systems.
在分析周期运动的稳定性时，采用谐波平衡方法，得到转子周期运动的稳定条件，为工程设计提供了一定的依据。
To study the stability of periodic motions the harmonic balance method is used. The condition for the stability of periodic motions can provide a theoretical basis for the design of rotor systems.
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