摘要
为检验霍尔推力器加速寿命试验法用于寿命预测的有效性,需对该方法在壁面形貌加工环节引入的误差的影响进行合理评估。基于此,在霍尔推力器工作80h后的壁面形貌上构造了不同类型的加工误差,利用基于惠更斯子波法的壁面形貌侵蚀演化模型计算和分析了壁面离子溅射条件对加工误差侵蚀演化特性的影响。结果表明:随着侵蚀的进行,误差会逐渐减小并向四周扩散;离子入射角度对误差的侵蚀演化影响最大,适当的入射角可以使误差被完全消除;因此,壁面形貌的加工误差对加速寿命试验方法的寿命预测效果几乎没有影响。
To verify the effectiveness of using accelerated life test technique to predict Hall thruster＇s lttettme, tt ts necessary to e- valuate the influence of wall profile errors introduced in the manufacturing procedure. Accordingly, different types of manufactur- ing errors were constructed on the wall profile after the Hall thruster runs for 80 hours and then a channel wall erosion model based on the Huygens wavelet method was applied to simulate and analyze the erosion and evolution of manufacturing errors under different ion sputtering conditions. Results show that the profile error is smoothed down gradually and spreads around the ion in- cident angle has the greatest effect; an appropriate angle can erase the error completely; hence, there is almost no influence of profile manufacturing errors on the lifetime prediction by using the accelerated life test.
出处
《中国科技论文》
CAS
北大核心
2015年第4期416-419,428,共5页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20122302110048)
关键词
动力机械及工程
霍尔推力器
加速寿命试验
形貌误差
壁面侵蚀演化
power machinery and engineering
Hall thrusters
accelerated life test
profile error
wall erosion and evolution
作者简介
李鸿（1982-），男，讲师，主要研究方向为霍尔电推进理论与技术，lihong@hit．edu．cn
