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CO_2焊接逆变电源的模糊PI电流波形控制研究 被引量:4
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作者 汪运浩 刘珊中 《合肥工业大学学报(自然科学版)》 CAS CSCD 北大核心 2012年第7期899-903,1005,共6页
CO2气体保护焊中影响飞溅和焊缝成形的直接因素是焊接电流。文章通过电流波形发生器产生符合提高焊接质量的短路、燃弧阶段的电流波形,并设计了相应的模糊PI控制器,构成CO2焊接逆变电源的模糊PI电流波形控制系统,以减少飞溅,提高焊缝成... CO2气体保护焊中影响飞溅和焊缝成形的直接因素是焊接电流。文章通过电流波形发生器产生符合提高焊接质量的短路、燃弧阶段的电流波形,并设计了相应的模糊PI控制器,构成CO2焊接逆变电源的模糊PI电流波形控制系统,以减少飞溅,提高焊缝成形。仿真研究表明,所设计的控制器系统能使焊接电流快速、准确地跟踪给定的电流波形。文中讨论了回路电感对短路末期焊接电流大小的影响,为实际的CO2焊接逆变电源控制系统的设计提供理论依据和参考。 展开更多
关键词 CO2气体保护焊 电流波形发生器 模糊PI控制器 回路电感
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A New Generator for Tsunami Wave Generation
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作者 Tetsuya Hiraishi Ryokei Azuma +2 位作者 Nobuhito Mori Toshihiro Yasuda Hajime Mase 《Journal of Energy and Power Engineering》 2016年第3期166-172,共7页
A middle size experiental wave generator has been implemented is the Ujikawa Open Laboratory, Disaster Prevention Research Institute, Kyoto University. The generator is composed of a pistontype wave maker, a head stra... A middle size experiental wave generator has been implemented is the Ujikawa Open Laboratory, Disaster Prevention Research Institute, Kyoto University. The generator is composed of a pistontype wave maker, a head strage water tank and a current generator to mainly reproduce long waves like tsunami and storm surge. The paper desribes several experimental series to predict the applicability of the generator to model tests. The three operating sysemes are capable to be controlled in one operating sysytem and start time is contorolled separately according with the target tsunami and storm surge profiles. A sharp tsunami profile is reproduced in adjusting the start timing of piston type wave maker and opening gates of head storage tunk. Any type of tsunami waves are reproduced in the generator and it becomes a storong tool to predict the effective of"resiliency" of hardwares. 展开更多
关键词 TSUNAMI storm surge experimental generator tool wave maker.
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