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滤波器     
相关语句
  filter
    Cascade H-bridge Multilevel Converter with Carrier Phase-shifted SPWM Technique and Its Application to Active Power Filter
    载波相移级联H桥型多电平变流器及其在有源电力滤波器中的应用研究
短句来源
    Study on Active Power Filter and Dynamic Voltage Restorer Based on One-cycle Control Theory
    基于单周控制理论的有源电力滤波器与动态电压恢复器研究
短句来源
    Research on the Key Techniques of Shunt Active Power Filter
    并联有源电力滤波器实用关键技术的研究
短句来源
    Method for Design of Filter Used in Silicon Controlled Inverter
    可控硅逆变器中滤波器的设计方法
短句来源
    The Effect of Q-value of the Quartz Resonator on the Filter Characteristic at Very Narrow Frequency Band
    石英谐振器的Q值对甚窄带滤波器性能的影响
短句来源
更多       
  filters
    A Study on New Detection and Control Approaches of Distortion Currents for Active Power Filters
    有源电力滤波器谐波电流检测和控制新方法的研究
短句来源
    A Study on Intelligent Detection and Control Approaches of Distortion Currents for Active Power Filters
    有源电力滤波器谐波电流智能测控方法研究
短句来源
    The Primary Reliablity Test of TV-IF SAW Filters
    SAW电视中频滤波器的可靠性初步试验
短句来源
    Analysis on Preliminary Failure for H2043 Colour TV IF Filters and Its Solution
    H2043型彩色电视中频滤波器的早期失效分析及解决途径
短句来源
    Analysis and Design of Switched Capacitor Filters
    开关电容滤波器的设计和分析
短句来源
更多       
  wave filter
    The Study of Cascade IIR Notch Wave Filter to Reject Periodic Interference in Partial Discharge Measurement on Line
    抑制局部放电在线监测中周期性干扰的级联式IIR陷波滤波器的研究
短句来源
    The inverter controller is adopted PIC single-chip-computer and PWM chip SA4828, and IPM as inverter, LC wave filter. The voltage feedback is got through the chip AD736 which accomplishes the task of sampling the voltage.
    控制器采用PIC单片机并结合PWM芯片SA4828,用IPM作为逆变输出,并采用LC滤波器将IPM输出波形滤成正弦波,电压反馈采用真有效值转换芯片AD736完成电压样任务。
短句来源
    The harmonic wave filter is added to the frequency converter to reduce the distortion ratio of harmonic wave of station service power from 26.9% to about 4.4% .
    对变频器加装了谐波滤波器 ,使厂用电的谐波畸变率从 2 6 9%减少至 4 4 %左右。
短句来源
    The experiment indicates that it can reduce EMI by 40 dBμV by the simple EMI wave filter.
    实验表明:利用简易的EMI滤波器可将电磁干扰衰减40 dBμV;
短句来源
    However,using the improved EMI wave filter can reduce EMI by 50~70 dBμV.
    使用改进后的EMI滤波器,能将电磁干扰衰减50~70 dBμV。
短句来源
更多       
  the filter
    The Effect of Q-value of the Quartz Resonator on the Filter Characteristic at Very Narrow Frequency Band
    石英谐振器的Q值对甚窄带滤波器性能的影响
短句来源
    Development of the Filter for Power System Synthetic Simulators
    电力系统综合模拟器中滤波器的研制
短句来源
    An On-line Overheat Fault Diagnosis of the Filter Coil for 7th Harmonic in Zhengzhou 500kV Substation
    郑州500kV变电站SVC七次谐波滤波器线圈过热的在线故障诊断
短句来源
    The filter, three-terminal chip capacitor and the capacitor can be used in the lowvoItage power suppIy circuit(5V. +l-15V and 24V) to restrain the EFTs affecting thedigital system.
    3 提出在5V、+/-15V、24V弱电电源回路中,通过增加适用于弱电系统滤波器、EMI片状滤波器以及在弱电电源端加入电容器等措施,可以有效地抑制瞬变骚扰对数字系统的影响。
短句来源
    For example, to the frequency splitting between fundamental wave and second harmonics, the filter Daub6 and CQF12 do well in extract the fundamental wave, whereas the filter Daub5 and Daub6 do well in extract the second harmonics.
    如对于基波与二次谐波的分频,Daub6和CQF12滤波器对基波的滤波效果较好,而Daub6和Daub5对于二次谐波的滤波效果较好。
短句来源
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      filter
    We characterize the wavelet multipliers, as well as the scaling function multipliers and low pass filter multipliers.
          
    For compactly supported gm, n (FIR filter banks) we prove an exponential rate of convergence and derive explicit expressions for the involved constants.
          
    This, in turn, is used for designing local orthogonal bases obtained by unitary transformations of a single prototype filter.
          
    This in turn, is used for designing local orthogonal bases obtained by unitary transformations of a single prototype filter.
          
    The measure for uncertainty is a product of two factors evaluating the frequency selectivity in comparison with the ideal filter and the effective length of the filter in the digital domain, respectively.
          
    更多          
      filters
    The main purpose of this paper is to give a procedure to "mollify" the low-pass filters of a large number of Minimally Supported Frequency (MSF) wavelets so that the smoother functions obtained in this way are also low-pass filters for an MRA.
          
    This phenomena is related to the invariant cycles under the transformation We also give a characterization of all low-pass filters for MSF wavelets.
          
    The main purpose of this paper is to give a procedure to "mollify" the low-pass filters of a large number ofMinimally Supported Frequency (MSF) wavelets so that the smoother functions obtained in this way are also low-pass filters for an MRA.
          
    We also give a characterization of all low-pass filters for MSF wavelets.
          
    Unitary mappings between multiresolution analyses of L2 (R) and a parametrization of low-pass filters
          
    更多          
      wave filter
    Robust autopilot with wave filter for ship steering
          
    A ship's dynamic model with wave disturbances was built and a wave filter was designed by means of an extended states observer (ESO).
          
    According to ZBJ65015-89 standard about noise level testing method of woodworking tool, the noise testing for MJ90# and MJC1125 precision panel saws was conducted by using model ND2 precision sound-level apparatus and double frequency wave filter.
          
    Our data on the spectral absorbance of the lens and visual pigment of these fishes suggest that the lens pigmentation acts as a short-wave filter to improve acuity of the visual system.
          
    Pipelining the unconstrained three-port wave filter adaptor at the bit level
          
    更多          
      the filter
    The measure for uncertainty is a product of two factors evaluating the frequency selectivity in comparison with the ideal filter and the effective length of the filter in the digital domain, respectively.
          
    The uncertainty product of such minimizing filters approaches the unrestricted infimum as the filter length increases.
          
    We conclude that the filter-capacitance of the rectifier can be designed.
          
    Furthermore, the filter design problem is converted into a convex optimization problem with linear matrix inequality (LMI) constraints.
          
    The filter was operated in the downflow manner and the results showed that the removing rate of NH4+-N was related to the influent concentration of NH4+-N.
          
    更多          


    When the converter, used for HVDC transmission, is connected to a weak a.c. power system, the filters and static condensers on its a.c. side also supply a considerable amount of additional commutating current, which is usually neglected in the case of converter connecting to strong power system. Taking into account the effect of this additional commutating current, the commutation process is accelerated, so that in the performance analysis of converters connected to weak system this effect must be considered....

    When the converter, used for HVDC transmission, is connected to a weak a.c. power system, the filters and static condensers on its a.c. side also supply a considerable amount of additional commutating current, which is usually neglected in the case of converter connecting to strong power system. Taking into account the effect of this additional commutating current, the commutation process is accelerated, so that in the performance analysis of converters connected to weak system this effect must be considered. In this paper the experimental results obtained on a physical model are presented. The results are analysed in detail. By comparison of the analytical and experimental results, it is revealed that the method here proposed for calculating the performance of the conveterts connected to a weak power system is satisfactory for general design work.

    当直流输电的换流器接在弱交流系统运行时,其交流侧的调谐滤波器和无功补偿静电电容器也会提供一部份为数不小的换相电流。但是在换流器运行于强系统情况下这个换相电流分量通常小到可以忽略不计。由于这部份换相电流的作用加速了接于弱系统换流器的换相过程,并使换相角减小。因此在分析和计算它的工况时,如果仍沿用接于强系统的计算方法,而不考虑这部份电流的作用势必引起很大的差错,为了探讨滤波器和静电电容器参与换相过程的作用,在进行原理分析的同时,还利用直流输电动态摸拟系统做了一系列试验。根据分析和试验结果提出了的接于弱系统换流器工况简化计算方法,可用于一般设计计算。

    This paper describes the input circuit and anti-interference measures of A-D-A type digital frequency discriminator used in the speed governing system of hydraulic turbines.In the first part of the paper, a current composite connection for simplifying the main equipment circuitry and the design of an input filter are introduced. In the second part, after a brief analysis of the interference characteristic in the speed governing system of hydraulic turbines, effective measures for resisting interference are proposed....

    This paper describes the input circuit and anti-interference measures of A-D-A type digital frequency discriminator used in the speed governing system of hydraulic turbines.In the first part of the paper, a current composite connection for simplifying the main equipment circuitry and the design of an input filter are introduced. In the second part, after a brief analysis of the interference characteristic in the speed governing system of hydraulic turbines, effective measures for resisting interference are proposed.

    本文介绍用于水轮机调速系统中的A-D-A型数字鉴频器的输入电路和抗干扰措施. 作者论述了一种简化主设备的电流复合接线;介绍了输入滤波器的设计:并提供了工业试验数据。 对水轮机调速系统中干扰的特征进行了扼要分析;提出了有效的抗干扰措施并论述了该系统的抗扰性。

    In this paper, a dynamic measuring system for vibration parameters is discussed, which can be used to analyse the performance of a rotating machine during its speed-up. The system includes digitally-controlled-conductance tunable active filters, digitally-controlled sine and cosine components converter, low-frequency wide-band phase-locking frequency-doubling circuits, e. t. c. It can be used to plot curves directly, with the help of a x—y recorder, such as the amplitude-frequency and phase-frequency characteristics...

    In this paper, a dynamic measuring system for vibration parameters is discussed, which can be used to analyse the performance of a rotating machine during its speed-up. The system includes digitally-controlled-conductance tunable active filters, digitally-controlled sine and cosine components converter, low-frequency wide-band phase-locking frequency-doubling circuits, e. t. c. It can be used to plot curves directly, with the help of a x—y recorder, such as the amplitude-frequency and phase-frequency characteristics and the polar diagram of vibration parameters. The auto-tracking frequency filter of the system can be used as a synchro-filter and for automatic analysis of frequency spectrum. Direct plotting of polar diagram is a new function for which no commercial instrument is available as yet.

    本文叙述了旋转机械升速过程中振动参数的动态测试系统。该系统由数控电导可调有源滤涉器、数控正弦和余弦分量转换器、低频宽带锁相倍频器等电路组成,可直接利用X—Y记录仪绘制出振动参数的幅频特性曲线、相频特性曲线及振型圆图。该系统中的自动频率跟踪有源滤波器可在同步滤波和自动频谱分析中使用。利用X—Y记录仪绘制极座标曲线,弥补了目前没有极座标绘图仪的不足。

     
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