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对转结构永磁无刷直流电机的Simulink建模 被引量:3
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作者 吕航 王淑红 +1 位作者 王延涛 武潇 《微电机》 北大核心 2014年第5期13-16,共4页
反电势波形函数是永磁无刷直流电机建模的关键。本文针对对转结构永磁无刷直流电动机的反电势波形函数提出了一种计及齿槽效应影响的精确处理方法,即气隙径向磁密函数法。应用此方法建立了对转结构永磁无刷直流电机的Simulink模型,将仿... 反电势波形函数是永磁无刷直流电机建模的关键。本文针对对转结构永磁无刷直流电动机的反电势波形函数提出了一种计及齿槽效应影响的精确处理方法,即气隙径向磁密函数法。应用此方法建立了对转结构永磁无刷直流电机的Simulink模型,将仿真结果与有限元软件Maxwell的分析结果进行了比对。结果表明该方法可以提高系统模型的仿真精确性,为对转结构永磁无刷直流电机的性能和控制策略研究提供了基础。 展开更多
关键词 对转结构 永磁无刷直流电机 气隙径向磁密 SIMULINK 有限元法
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Naxi-English Bilingual Word Alignment Based on Language Characteristics and Log-Linear Model
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作者 Yu Zhengtao Xian Yantuan +2 位作者 Tian Wei Guo Jianyi Zhang Tao 《China Communications》 SCIE CSCD 2012年第3期78-86,共9页
We propose a method that can achieve the Naxi-English bilingual word automatic alignment based on a log-linear model.This method defines the different Naxi-English structural feature functions,which are English-Naxi i... We propose a method that can achieve the Naxi-English bilingual word automatic alignment based on a log-linear model.This method defines the different Naxi-English structural feature functions,which are English-Naxi interval switching function and Naxi-English bilingual word position transformation function.With the manually labeled Naxi-English words alignment corpus,the parameters of the model are trained by using the minimum error,thus Naxi-English bilingual word alignment is achieved automatically.Experiments are conducted with IBM Model 3 as a benchmark,and the Naxi language constraints are introduced.The final experiment results show that the proposed alignment method achieves very good results:the introduction of the language characteristic function can effectively improve the accuracy of the Naxi-English Bilingual Word Alignment. 展开更多
关键词 word aligrmaent Naxi language ENGLISH log-linear model interval switching function posi-tion transformation function
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