Starting from the magnetic charge model of permanent magnets, using scalar magnetic potential method, generalized binomial theorem and vector superposition theorem, this thesis builds an analytical expression of magnet rings about magnetic field distribution in the external space of permanent magnets. The analytical expression was implemented in the MATLAB simulation software. Meanwhile, actual magnetic field distributions of two different permanent magnets were measured using three- dimensional digital teslameter. Other magnetic field distributions of these magnet was built in Ansoft Maxwell simulation software. Through checking the analytical calculation result against actual magnetic field distributions and Ansoft Maxwell simulation result,it is found that the analytical expression describes the magnetic field e-volution accurately, and the calculation error of the magnet induction is less than 7%. The results show that the calculation formula is correct.%飞机襟、缝翼运动机构中滚轮滑轨的磨损状况对飞机的安全性有很大的影响,为研究滚轮滑轨的磨损情况,基于某滚轮滑轨磨损试验机,Ni WLS - 9234数据采集卡和LabVIEW软件开发平台,对滚轮和滑轨相对位移所产生的振动信号进行采集及分析,并开展大量试验,开发了一套磨损故障监测系统.系统采用Remote Panels监控技术、SQL与数据库访问技术、报表生成技术、以及小波分析技术,能够有效地监测磨损故障.
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