| Project/Area Number |
26420224
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
Ando Yoshiaki 電気通信大学, 大学院情報理工学研究科, 准教授 (30323877)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 自然電磁気減少 / 計算電磁気学 / 電磁界解析 / VLF/LF大地-電離圏導波管伝搬 / 地殻内電磁波伝搬 / FDTD法 / VLF/LF大地電離圏導波管伝搬 / 地殻内電波伝搬 / VLF/LF帯伝搬 / PML / VLF帯大地電離層導波管伝搬 / 多目的最適化 / 電子密度同定 / CIP法 / 地圏内電磁波伝搬 / CIP-BS法 |
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| Outline of Final Research Achievements |
In this research, simulation techniques for natural electromagnetic phenomena are developed. First, I developed a perfectly matched layer (PML) to absorb waves at boundaries of a computational domain with the shape of spherical sectors. The numerical measurements show that the developed PML has effective absorbing performance. Second, I developed an identification method of electron density profile in the D-region of the ionosphere by using the VLF/LF waveguide propagation simulation. If the identification parameters are appropriate, approximated profiles can be obtained. Third, the weighted Laguerre polynomial finite difference time domain (WLP-FDTD) method was considered as an effective simulation for electromagnetic wave propagation in the lithosphere. The WLP-FDTD method shows extremely high performance for the simulation, and is about 3000 times faster than the conventional FDTD method.
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