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基于定子磁链间接计算的内置式永磁同步电机无位置传感器鲁棒性提升控制 被引量:4
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作者 张航 梁文睿 +1 位作者 陈哲 张辉 《中国电机工程学报》 EI CSCD 北大核心 2022年第7期2723-2732,共10页
提出一种适用于高铁牵引系统优化同步调制区的内置式永磁同步电机无位置传感器控制策略。基于磁链间接计算法,对交直轴电流进行估计并用给定磁链代替估计值,降低了对估计磁链幅值的依赖性。在此基础上,考虑到电机参数变化对转子位置估... 提出一种适用于高铁牵引系统优化同步调制区的内置式永磁同步电机无位置传感器控制策略。基于磁链间接计算法,对交直轴电流进行估计并用给定磁链代替估计值,降低了对估计磁链幅值的依赖性。在此基础上,考虑到电机参数变化对转子位置估计性能和系统鲁棒性的影响,基于d轴电流和电压误差,实时计算永磁体磁链和交轴电感偏差系数,并实时对改进后间接磁链法中的定子磁链计算、交直轴电流估计和负载角估计环节进行参数修正,从而提高参数变化下的转子位置估计精度。基于此构建RTLAB硬件在环的IPMSM矢量控制系统,实验结果表明:改进后的间接磁链计算法能够有效降低优化同步调制下的转子位置估计误差,增强系统鲁棒性。 展开更多
关键词 内置式永磁同步电机 无位置传感器控制 磁链间接计算 参数误差修正 系统鲁棒性
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基于PAM-RTM的风轮叶片真空辅助灌注仿真研究
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作者 李东 王艺璇 +3 位作者 范海光 梁文瑞 杨朋飞 毛水莲 《机电工程技术》 2022年第6期155-157,244,共4页
通过工艺性实验来确定风力发电机组风轮叶片灌注流道设计是否合理,能否在理想的时间内将叶片壳体灌注完毕,减少因流道设计不合理导致大面积纤维材料未浸润,或因树脂在制品未灌注完成前已经固化引入的报废风险,不仅耗时耗力,而且人工和... 通过工艺性实验来确定风力发电机组风轮叶片灌注流道设计是否合理,能否在理想的时间内将叶片壳体灌注完毕,减少因流道设计不合理导致大面积纤维材料未浸润,或因树脂在制品未灌注完成前已经固化引入的报废风险,不仅耗时耗力,而且人工和原材料成本都比较高,实验过程较为繁琐,通常要经历铺层、灌注、固化、去辅材、切割观察厚度剖面等工序,同时存在一次实验结果不理想,经调整后进行更多次实验的可能。为了解决这一情况,国内外产品制造厂商联合高等院校通过软件仿真模拟产品结构较复杂位置灌注过程,并与实际的工艺性实验过程进行对比,总结出灌注流道设计的一些方法和规律。为了研究风轮叶片VARI工艺过程中树脂在曲面构件中的流动规律,通过PAM-RTM、CATIA和Patran等仿真软件来实现上述过程,找出不同流道设计的异同点,进而优化参数,指导生产。 展开更多
关键词 VARI 风力发电机组 风轮叶片 灌注 仿真 PAM-RTM
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Research on the Integrated Development of Disability Services in the Greater Bay Area From the Perspective of Media Functions
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作者 WANG Jinghao ZHANG Jingsong +1 位作者 LI Jiangqi liang wenrui 《Psychology Research》 2023年第6期253-265,共13页
As the main window for the public to understand the outside world,mass media has an undeniable influence on economic and social development.The way in which the media reports on issues related to people with disabilit... As the main window for the public to understand the outside world,mass media has an undeniable influence on economic and social development.The way in which the media reports on issues related to people with disabilities not only affects the voice of the disabled community,which determines the public image of the“disappearing”disabled community,but also affects the public awareness and recognition of the disability cause.To further explore the current status of mainstream media’s coverage of the disability cause,this article combines relevant concepts from media function theory and analyzes reports related to the integrated development of the disability cause in the Guangdong-Hong Kong-Macao Greater Bay Area by using the examples of the Zhuhai Special Zone Daily,Southern Metropolis Daily,and Shenzhen Special Zone Daily since the release of the Development Plan Outline for the Guangdong-Hong Kong-Macao Greater Bay Area in 2019.The results show that the“Integrated Development of the Disability Cause in the Bay Area”presented in the reports has the characteristics of service-oriented and cooperation-based,which is in line with the overall trend of the development of China’s disability cause.However,due to factors such as a small overall quantity of related reports,a relatively single style of reporting and information sources,and a strong promotional tone,there still exists a certain difference between the“media reality”and objective reality constructed by these reports.Therefore,this article suggests that institutional media should fully strengthen their coverage of relevant topics,while enhancing the timeliness and readability of reports by enriching various reporting elements.By further enhancing the effectiveness of reporting and communication,the integrated development of the disability cause in the Bay Area can be effectively promoted. 展开更多
关键词 disability services Greater Bay Area media function
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