航空故障电弧形成机理、特征及保护特性的研究

项目名称： 航空故障电弧形成机理、特征及保护特性的研究

项目编号： No.51477004

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 张俊民

作者单位： 北京航空航天大学

项目金额： 81万元

中文摘要： 航空电缆故障电弧是引发空难事故的原因之一。为了能及时发现故障电弧，减轻其带来的危害，本项目针对航空故障电弧的关键科学与基础性问题，从数学建模、数字仿真与实验的角度，进行理论探索与技术创新研究。建立考虑故障电弧能量交换、电缆烧蚀、气流、洛伦兹力等相互作用的磁流体动力学故障电弧模型，构建模拟实验平台，研究故障电弧放电过程及其与电磁场、流场和电缆相互作用机理，揭示故障电弧的产生、发展、熄灭以及重燃的演化规律；分析故障电弧物理参量和电气参量暂态特征及影响因素，研究故障电弧动态特性；采用快速傅立叶变换、小波变换等方法，研究故障电弧的时域、频域特征，提出辨识故障电弧的特征参数；分析故障电弧能量、电弧运动特性与电缆烧蚀规律的关系，研究故障电弧保护特性。本项目的研究成果，为现代飞机的故障电弧检测技术奠定理论基础和电气系统综合控制与健康管理提供技术支撑。

中文关键词： 航空故障电弧；机理；动态特性；保护特性；电弧模型

英文摘要： Fault arcs occurring in aeronautic electrical circuits may have a catastrophic effect. In order to recognize fault arcs without delay and control their consequences. The proposed project will focus on the key science and fundamental issue of fault arcs occurring in aeronautic cables for theoretical exploration and technological innovation in the view of mathematic model established, simulation and experiment of the fault arc. A fault arc model will be established based on the magneto-hydrodynamic modeling considering the effects of arc energy, cable ablation, flow and Lorents force. And the physical experimental platforms will be designed and made up in order to creating the fault arcs. The interaction mechanism of fault arcs with the surrounding electromagnetic and fluid fields and cable will be explored for evolution laws that govern the fault arcs' ignition, development, extinction and re-ignition. The arc characteristic will be presented through analyzing the relationship between the physics parameters and the electrical transient parameters of fault arcs. The time domain and frequency domain characteristics of fault arcs will be researched by adopting various methods such as FFT and wavelet packet for recognize the fault arcs. The protection characteristics of fault arcs will be proposed with the help of the relations of ablation of cables with the arc energy and arc movement. These results of this project will lay a theoretical foundation and offer a technological support for detection of fault arcs and heath management of the electrical system of modern aircraft.

英文关键词： fault arcs in aeronautic cables;mechanism;dynamic characteristic;protection;arc model