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  矢量图
    The principle of selecting sync voltage of the thyristor trigger circuit in thyristor controlled rectification circuit is discussed. The practical method by using vector graph to select the sync voltage of the thyristor trigger circuit is proposed.
    介绍了晶闸管可控整流电路中触发电路的同步电压选择原理,并提出了将矢量图用于晶闸管触发电路同步电压选择的具体方法
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    The basic structure and control principle of the three potential PWM frequency transformer(TPFT)are analized in the article from the aspects of its output state,voltage waveform,space voltage vector and harmonic etc. The internal mechanism of the hexagon space voltage vector graph is revealed.
    文章从三电平PWM变频器的输出状态、电压波形、空间电压矢量、谐波等几个方面分析了它的基本结构、控制原理,揭示了六角形空间电压矢量图的内在机理。
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    Aiming at the flexible systems with varying parameters in lager range,based on the optimization theory and vector graph method,the zero-frequencies are solved and optimal robust EI time-delayed filter is presented,by taking the variation ranges of system parameters as apriori knowledge and taking the magnitude-frequency performance of ZV time-delayed filter as objective function.
    对于参数大范围变化的柔性系统,将系统参数变化范围作为先验知识,以ZV时滞滤波器的幅频特性作为目标函数,基于优化理论和矢量图法,计算零点频率,设计最优鲁棒EI时滞滤波器。
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  vector graph
A model relating the input vector graph to the curves to be detected is proposed.
      
Hierarchical Image Segmentation-Part I: Detection of Regular Curves in a Vector Graph
      


The principle of selecting sync voltage of the thyristor trigger circuit in thyristor controlled rectification circuit is discussed.The practical method by using vector graph to select the sync voltage of the thyristor trigger circuit is proposed.

介绍了晶闸管可控整流电路中触发电路的同步电压选择原理,并提出了将矢量图用于晶闸管触发电路同步电压选择的具体方法

The basic structure and control principle of the three potential PWM frequency transformer(TPFT)are analized in the article from the aspects of its output state,voltage waveform,space voltage vector and harmonic etc.The internal mechanism of the hexagon space voltage vector graph is revealed.The excellent properties of the TPFT and its function in the output frequency regulation,voltage regulation and PWM modulation control are stated in detail.

文章从三电平PWM变频器的输出状态、电压波形、空间电压矢量、谐波等几个方面分析了它的基本结构、控制原理,揭示了六角形空间电压矢量图的内在机理。详细叙述了三电平PWM变频器在输出调频、调压和PWM调制控制中的作用以及三电平PWM变频器的优异性能。

Time-delayed filters are used to restrain the residual vibrations of flexible systems,However,typical time-delayed filters are less robust to the errors of system parameters and can not effectively reduce the residual oscillations.Aiming at the flexible systems with varying parameters in lager range,based on the optimization theory and vector graph method,the zero-frequencies are solved and optimal robust EI time-delayed filter is presented,by taking the variation ranges of system parameters as apriori...

Time-delayed filters are used to restrain the residual vibrations of flexible systems,However,typical time-delayed filters are less robust to the errors of system parameters and can not effectively reduce the residual oscillations.Aiming at the flexible systems with varying parameters in lager range,based on the optimization theory and vector graph method,the zero-frequencies are solved and optimal robust EI time-delayed filter is presented,by taking the variation ranges of system parameters as apriori knowledge and taking the magnitude-frequency performance of ZV time-delayed filter as objective function.The features of the filter are that the parameter variation ranges are taken into account,and the maximum magnitude of residual oscillations maintains no change in the parameter variation range.Thus,the filter is more robust to the parameter errors and can effectively eliminate the residual oscillations when the system parameters vary in lager range.

时滞滤波器能抑制柔性系统的残留振荡,但典型时滞滤波器对系统参数误差的鲁棒性较差,不能有效抑制残留振荡。对于参数大范围变化的柔性系统,将系统参数变化范围作为先验知识,以ZV时滞滤波器的幅频特性作为目标函数,基于优化理论和矢量图法,计算零点频率,设计最优鲁棒EI时滞滤波器。该滤波器的特点是考虑了系统参数的变化范围,系统残留振荡的最大幅值在参数变化区间内相等,从而有更强的鲁棒性,特别是当系统参数大范围变化时,能有效消除柔性系统的残留振荡。

 
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