栅栏效应

采用快速傅立叶变换（FFT）进行电力系统谐波分析时，需要对采样信号截断并离散化，从而导致频谱泄漏和栅栏效应。

Fast Fourier Transform ( FFT ) is inevitable to cause the spectrum leakage and fence effect because of truncation and discreteness in signal collection .

在FFT频谱分析中，选择采用同步采样和汉宁窗函数修正方法，以消除频谱分析中栅栏效应和频谱泄露对测量的影响。

In the FFT spectrum analysis , synchronous sampling and hanning window function theory are adopted to eliminate the picket fence effect and spectral leakage in the spectral analysis .

高动态扩频测控系统中，基于FFT的伪码捕获算法存在“栅栏效应”影响频偏估计精度。

The " Picket Fence Effect " of the FFT-based code acquisition scheme for high dynamic DS / SS TT & C signals will degrade the accuracy of the frequency offset estimation .

在功率测量领域，现有的频域分解、识别方法比较单一，主要以FFT为基础，应用中存在泄漏误差大、栅栏效应、实时性不强等问题。

In the power measurement field , existing frequency-domain decomposition and recognition method are few , and most based on FFT . Large leakage error 、 grid effect and real time unforcement happened in the application .

对电机的实测信号进行谐波分析时，由于难以保证信号同步采样和存在测量噪声，采用快速傅立叶变换（FFT）方法进行谐波分析会出现栅栏效应和频谱泄漏现象，不能获得信号准确的谐波参数。

Due to non-synchronous sampling and noise in electric machine harmonic measurement , the picket-fence and leakage effect is introduced by fast Fourier transform , so that the accurate electric harmonic parameters can 't be achieved .

在异步采样的情况下，离散傅里叶变换（DFT）由于频谱泄漏及栅栏效应，计算结果不够精确，不能满足同步相量测量精度的要求。

The result of Discrete Fourier Transform ( DFT ) in asynchronous sampling is not accurate and can not satisfy the requirement of synchronized phasor measurements , due to spectral leakage and barrier effect .

为了减小由栅栏效应引入的位相误差，采用了对条纹进行空域数值加权和外插补零方法，从而提高FTP的测量精度。

In order to decrease the phase error introduced by " fence effect ", the measuring accuracy can be improved through numerically weighting for the fringes in spatial domain and extrapolation zero filling method .

传统的FFT算法只能分解出整数次谐波，而微网中间谐波的存在及基波频率变动，使得传统的FFT算法很难实现同步采样，从而导致频谱泄漏和栅栏效应。

Traditional FFT algorithm only can decompose integer harmonics . Because the presence of inter-harmonics and the changes of fundamental frequency , traditional FFT algorithm is difficult to achieve simultaneous sampling which will lead to spectral leakage and fence effect .

针对采用傅立叶算法在非同步采样下进行谐波分析容易出现的频谱泄漏与栅栏效应问题，本文采用了加窗分析的FFT算法。

Aimed at the problem that it is easy to bring the frequency spectrum leaks and fence effect when Fourier algorithm is adopted to analyse harmonic in non-synchronous sampling , this paper presents the method of window spectrum with FFT algorithm .

讨论了FFT应用过程中的A／D转换量化误差、频谱混迭现象、频谱能量的泄漏以及频谱的栅栏效应等主要误差因素对分析结果的影响。

Based on the essence of fast Fourier transformation , the main errors encountered in the quantizing distortion in A / D converting , as well as the leakage effect , aliasing effect and railing effect in signal spectrum analysis are discussed .

加窗插值傅立叶变换是抑制频谱泄漏和消除栅栏效应的有效方法，本文在分析Hanning窗和Blackman窗插值FFT算法的基础上，推导了三项Nuttall窗插值FFT算法。

The windowed interpolating Fourier transform is the effective method to restrain spectral leakage and eliminate fence effect . On the basis of analyzing the Hanning window and Blackman window interpolation FFT algorithm , the three Nuttall window interpolation FFT algorithm is derived in this paper .

信号的高精度采样中栅栏效应及克服方法

The Picket Fence Effect in Precision Sampling and its Prevention

信号采样过程中的栅栏效应会引起一定的误差，在高精度采样时，必须要考虑这个问题。

The Picket Fence Effect will influence the sampling result .

不同类型发酵香肠产品特性及其栅栏效应的比较研究

Comparative Studies on the Product properties and Hurdle Effect of Fermented Sausages

栅栏效应是食品保存的根本所在。

Hurdle effect is the essential events of food preservation .

发酵香肠加工的栅栏效应与加工优化

Hurdle Effect and Optimizing Processing of Fermented Sausage

迷你萨拉米香肠栅栏效应及其加工控制研究

Study on the Hurdle Effect of Chinese Style Mini - salami Sausage and Its Process Control

在非同步采样条件下，分析了频谱泄漏和栅栏效应对信号分析造成的影响。

In the condition of non-synchronous sampling , the paper presented the unavoidable signal spectral leakage and picket-fence effect of single signal .

并从减小栅栏效应带来的幅值估计误差的角度，设计了一个具有平顶窗谱的窗函数，分析对比了它和矩形窗函数的性能差异。

A window function which has a flat top in frequency domain is designed to correct the amplitude error caused by Picket_Fence effect .

在论述了谐波分析方法测介损的原理后，分析了频谱泄漏和栅栏效应产生的原因及其解决方法。

Therefore , the paper has in-depth studied the principle of harmonic analysis method , analysed the reasons and solutions of spectrum leakage and fence effect .

由于同步采样和整数周期截断在实际中很难做到，频谱泄漏和栅栏效应将影响到谐波分析的结果。

As it is difficult to satisfy synchronous sampling and integral period truncation in practice , harmonic analysis results will be disturbed by the spectrum leakage and fence effect .

通过加窗以及采用插值算法，能够有效地抑制频谱泄漏和栅栏效应，提高谐波参数测量的准确度。

Because of spectrum leakage and fence effect can be limited by using window functions and interpolation algorithm , an improved algorithm based on interpolation algorithm is presented in this paper .

该方法的信号采集和处理需要较长的时间延迟，信号处理时存在栅栏效应和频谱泄漏现象，导致谐波检测的实时性较差、精确度不高。

However , FFT needs longer time to collect and process the signal . Further more , there are grid-effect and frequency-leak in the processing , which leads to inferior real-time and precision .

插值算法可以减少栅栏效应引起的误差，频谱泄漏引起的误差则可以用加窗函数的方法来减少。

Interpolation algorithm can reduce the error caused by the fence effect [ 3 ~ 7 ] , the error which is caused by the spectral leakage can be reduced by adding window function .

针对加窗傅氏变换的栅栏效应，研究了各种窗谱校正和频率细化方法。分析了样本长度对窗谱校正精度的影响。

Aimed at the fence effect of window Fourier transform , the various methods of window spectrum emendation and frequency subdivision are studied , and the influence of the sample 's length for window spectrum calibration accuracy is analyzed .

在仔细研究了各种常用窗函数窗谱特性的基础上，本研究加载了合适的窗函数来降低频谱泄露；并采用在信号的末尾增添零值的办法降低了频谱的栅栏效应。

Based on the analysis of various common windows ' spectrum characteristic , this paper adopted a suitable window to eliminate the spectrum leakage effect . Palisades effect was decreased by adding zeros to the end of the original signals .

傅立叶变换是最基本的谐波分析方法，其主要缺点是在非同步采样时存在频谱泄露和栅栏效应，并且频率分辨率与采样数据长度成反比。

Fourier transform is the elementary method for the analysis of harmonics , which mainly disadvantage is that it exists the spectral leakage and fence effect , its frequency resolution is inversely proportional to the sample data length in asynchronous sampling .

本文首先分析了传统谐波分析法测特点以及由此产生栅栏效应和频谱泄漏的原因，在参考电容型设备介质损耗因数在线检测技术的基础上，运用加窗插值技术进行改进仿真分析。

Firstly , the paper analysised main reason of the " stockade effect " and the frequency spectrum divulges , and then introduced adding window technical as well as the MATLAB simulation software to research electric capacity equipment dielectric power factor on-line examination .

SAR实时成像处理中常采用子孔径交叠来提取算法的并行性，但为抑制栅栏旁瓣效应，需要对输入数据进行交叠处理，极大地增加了处理数据量。

Subaperture processing is always used to parallize the SAR real-time imaging , but input data must be overlapped to avoid grating lobes , which greatly increase the data rate .

尼龙网栅栏防沙效应研究

The effects of an A-typed nylon fence on Aeolian sand prevention