According to the actuality of the present research on ct , this paper introduces the measurement principle of rogowski coil and analyzes the factor that influence the precision of measurement , we bring forward a new design scheme based on the rogowski coil 本文首先介绍了国内外电流互感器发展现状,重点对rogowski线圈测量原理进行分析,研究了线圈的稳态测量误差以及幅频特性、相频特性、暂态时间响应特性,论证了罗氏线圈作为传感器单元所具有的优良特性。
Subsequently , the special elastic coupling manner of the high - speed maglev is considered , and the restriction between the coupling factor of the single magnet module and other system parameters is studied . the influence of the coupling factor on the vehicle and guideway coupling vibration is also valued 在此基础上研究二维电磁铁模块系统的弹性结构耦合因素,分析渐近稳定条件下耦合系数与其它系统参数的制约关系,考察耦合参数对车轨耦合振动幅频特性的影响。
This paper analyzes the amplitude frequency characteristics of picture intermadite frequency amplify circuit of colour television , analyzes the influence of picture quality and sound quality for intermadiate frequency amplify circuit amplitude frequency characteristics , puts forward the method of reduce influence and improve picture and sound quality 摘要详细分析了彩电图像中放电路幅频特性曲线，分析中放幅频特性对图像质量、伴音质量的影响，提出了减少影响提高图像、伴音质量的方法。
Design a udp client terminal to realize the communications between the ncex1 . 0 test board and several computers . link intelligent instrument to ncex1 . 0 through rs232 . design client program to control intelligent instrument and gain data from intelligent instrument . the construction of ethernet - based automated measurement system : ethernet links the ncex1 . 0 to the hub in lan 基于以太网的自动测试系统的组建：智能仪器的串口接到电路板的串口，电路板的以太网口接到局域网的hub上，一个电路板接一台仪器，多个电路板就接多台仪器，把多台仪器连上以太网，设计相应的主控机程序来控制多台仪器以及获取仪器的读数，并进行数据处理和显示，优化测试系统的性能，并成功地做了一系列幅频特性的自动测试实验。
In order of the process of data processing arrives national standard , the article described the technology of data sign processing . compared and analyzed different methods of filter designing , chosen the method of fir with window and designed the low frequency data filter . used the software of matlab to simulate the frequency performance , which is combined with some experiments 为了使试验数据处理过程符合国家法规要求，本文对数字信号处理技术进行了探讨，对不同的数字滤波器设计方法进行了对比分析，择优采用fir加窗技术开发出了满足要求的低通数字滤波器，并结合试验情况用matlab对本滤波器幅频特性进行了仿真计算分析。
Scalar network analyzer is a kind of intelligent instrument based on frequency sweep test technology that used to measure the amplitude - frequent cy characteristic of linear system . network analyzer adopt these new technology such as frequency synthesis , sampling technique , broad - band sweeping and computer - assisted testing 标量网络分析仪是一种基于扫频测量技术,用于测量线性系统幅频特性的智能化仪器。网络分析仪结合了频率合成技术、采样技术、宽带扫频技术、计算机辅助测量等新技术。
Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier . so it appears cyclostationary . in the field of spectral correlation , ds signals appears its characteristic as fallows : for the amplitude of spectral correlation , the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet , and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation , the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency Ds信号是经过高速伪随机序列和正弦载波二次调制的宽带信号,因此具有周期平稳特性,它在谱相关域表现为:幅频特性在谱频率等于零截面切片上包含了载频和伪码速率信息特征,在谱频率等于载频截面切片上包含了伪码速率信息特征;相频特性在循环频率等于两倍载频截面切片上包含了载波初相信息特征。
This paper presents a model of cosine basis functions neural network based on bp algorithm , discusses the relation between the algorithm of neural network and amplitude - frequency characteristic about the linear phase fir filter , introduces the convergence condition of neural network algorithm , and studies the optimal design example about the high - order fir double - band - pass filters 提出了一种基于bp算法的正弦基函数神经网络模型及算法的收敛条件，研究了该神经网络算法与fir线性相位滤波器幅频特性的关系，给出了高阶双通带滤波器的优化设计实例。
The other is to simulate simple lc filters which call ideal and real inductors model , then we can get the simulating results such as time 、 phase movement and amplitude - frequency specifications are very different mainly due to hysteresis . in all , this paper presents some called real inductors models and provides a design method of real inductor model 仿真结果表明,调用磁芯电感模型的仿真曲线比调用理想电感的情况滞后、幅值小,反映了磁芯电感元件的电感量、磁滞效应和磁滞损耗都影响滤波器的时移、相移和幅频特性。
We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna . then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys . through the analysis we got the system ' s connatural characteristic , the amplitude - frequency characteristic of harmonic response , the power spectrum density of random vibration response , the maximal amplitude and resuming time of impact response 其次借助ansys有限元分析软件，对系统进行了模态分析和动力学响应分析，获得了不同天线结构参数下的卫星?天线系统的固有特性，简谐响应的幅频特性，随机振动响应的功率谱密度，以及冲击响应的最大幅值和恢复时间等。
