Periodic fluctuation of heater currents in space traveling wave tubes
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摘要: 针对空间行波管阴极预热过程中热子电流周期性波动的故障，建立热子等效电路估算了热子电流波动范围，采用激光测振频谱分析的手段测试了热子双螺旋结构的固有频率，进而完成了问题定位，对热子电流周期性波动进行了机理分析，阐明了热子电流发生周期性波动的条件，并提出了解决措施，同时从理论上定性分析了热子电流波动对空间行波管可靠性的影响，并通过试验验证了可靠性影响分析结论的正确性。Abstract: During the cathode preheating process of a small amount of space traveling wave tubes(TWTs), there is a fault of periodic fluctuations in the heater current. In response to this problem, the range of fluctuation of heater current is estimated by creating the equivalent circuit of heater, and the natural frequency of heater double-helix structure is measured by using the laser vibration, thereby the localization of the problem is completed, and the mechanism of period fluctuation of heater current is analyzed, and the conditions under which the periodic fluctuation occurs are clarified, and the solutions are put forward. Meanwhile, theoretically, the qualitative analysis is conducted on the influence of heater current on the reliability of the space TWTs, and the correctness of the conclusion of reliability influence analysis is verified through experiments.
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图 6 阴极热子组件固有频率测试框图
Figure 6. Block diagram of natural frequency for cathode-heater assembly
图 10 增加一个接触点的并联等效电路
Figure 10. Parallel equivalent circuit after adding a contact point
图 11 热子电磁感应力示意图
Figure 11. Schematic diagram of the electromagnetic induction force of heater
图 12 热子电流通断试验软件控制界面
Figure 12. Control interface of heater current on/off test software
表 1 热子组件加电6 s时测试数据
Table 1. Test data of heater assembly when powered on for 6 s
power on time/s U/V I/A R/Ω U/V I/A R/Ω sample 1# sample 2# 0 2.65 1.4 1.84 2.83 1.4 2.02 6 2.88 1.4 2.06 3.07 1.4 2.19 
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表 2 阴极热子组件固有频率测试数据
Table 2. Natural frequency test data of cathode-heater assembly samples
number natural frequency/kHz number of natural frequency point 1# 6.04/8.63/10.05/12.14/13.69/13.98 6 2# 4.53/6.04/9.70/10.70/13.05/15.39/15.71 7 3# 7.31/12.01/14.11/15.33 4 4# 5.34/10.76/11.70/12.70/13.51/14.91/15.60 7 5# 3.25/5.36/10.16/11.85/13.73/14.83 6 6# 0.78/1.11/1.59/3.13/9.68/12.58/13.89 7 7# 0.08/0.85/1.39/2.02/2.84/6.94/9.09/12.02/14.97 9
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[1] 易红霞, 袁广江, 金锋, 等. Ku波段150 W空间行波管的设计和研制[J]. 真空电子技术, 2014(3):24-28,43Yi Hongxia, Yuan Guangjiang, Jin Feng, et al. Development of Ku-band 150 W space TWT[J]. Vacuum Electronics, 2014(3): 24-28,43 [2] 张晶晶, 李晋忠, 王改丽. 空间行波管脉间噪声测试[J]. 真空电子技术, 2020(4):59-62Zhang Jingjing, Li Jinzhong, Wang Gaili. Interpulse noise test of space TWTs[J]. Vacuum Electronics, 2020(4): 59-62 [3] 刘宇荣, 刘斌, 王大明. 大功率行波管两级降压收集极的设计[J]. 强激光与粒子束, 2017, 29:103002Liu Yurong, Liu Bin, Wang Daming. Design of two stage depressed collector for high-power traveling wave tube[J]. High Power Laser and Particle Beams, 2017, 29: 103002 [4] 王小宁, 苏小保, 俞世吉, 等. 基于Wiener-Arrhenius模型的行波管阴极可靠性分析[J]. 真空电子技术, 2020(6):28-34Wang Xiaoning, Su Xiaobao, Yu Shiji, et al. Cathode reliability analysis of TWTs based on Wiener-Arrhenius model[J]. Vacuum Electronics, 2020(6): 28-34 [5] 程诚, 李季, 于志强, 等. 空间行波管阴极寿命试验[J]. 真空电子技术, 2010(5):37-43Cheng Cheng, Li Ji, Yu Zhiqiang, et al. M type cathode life tests for space TWTs[J]. Vacuum Electronics, 2010(5): 37-43 [6] 孟鸣凤, 俞世吉, 徐振英, 等. 行波管阴极热子组件结构的热分析[J]. 真空科学与技术学报, 2009, 29(5):513-516Meng Mingfeng, Yu Shiji, Xu Zhenying, et al. Thermal analysis of differently-structured cathode-heater assemblies in traveling wave tube[J]. Chinese Journal of Vacuum Science and Technology, 2009, 29(5): 513-516 [7] 宋芳芳, 张国兴, 何小琦, 等. 行波管阴极组件动态热耗散分析及优化设计[J]. 真空科学与技术学报, 2006, 26(2):118-122Song Fangfang, Zhang Guoxing, He Xiaoqi, et al. Dynamic thermal dissipation of cathode module in electron gun of traveling wave tube[J]. Chinese Journal of Vacuum Science and Technology, 2006, 26(2): 118-122 [8] 祝颂东, 孙宇楠, 梁田. 行波管故障现象分析及可靠性提升研究[J]. 电子器件, 2021, 44(6):1346-1352Zhu Songdong, Sun Yunan, Liang Tian. The analysis of TWT fault symptom and the improvement of TWT reliability[J]. Chinese Journal of Electron Devices, 2021, 44(6): 1346-1352 [9] 刘波, 程鸽. 行波管打火机理及其外围电路防护方法[J]. 雷达与对抗, 2017, 37(2):60-63Liu Bo, Cheng Ge. Sparking mechanism of TWT and its peripheral circuit protection methods[J]. Radar & ECM, 2017, 37(2): 60-63 [10] 宋芳芳, 恩云飞, 李斌, 等. 行波管热丝引出结构的耐随机振动量级分析[J]. 机械设计与制造, 2019(11):216-220Song Fangfang, En Yunfei, Li Bin, et al. Anti-random vibration magnitude analysis of the heat-lead-out structure of traveling wave tube[J]. Machinery Design & Manufacture, 2019(11): 216-220 [11] 王勇, 冯西贤, 范培云. 国产化空间行波管故障模式统计分析[J]. 真空电子技术, 2020(6):17-19Wang Yong, Feng Xixian, Fan Peiyun. Failure mode analysis of domestic space TWTs[J]. Vacuum Electronics, 2020(6): 17-19 [12] 刘燕文, 刘胜英, 田宏, 等. 用于空间行波管的高效率覆膜阴极组件的研究[J]. 真空科学与技术学报, 2006, 26(3):240-242Liu Yanwen, Liu Shengying, Tian Hong, et al. Fabrication of high efficiency M-type cathode assembly used in space traveling-wave tube[J]. Chinese Journal of Vacuum Science and Technology, 2006, 26(3): 240-242 [13] 廖复疆. 真空电子技术: 信息化武器装备的心脏[M]. 2版. 北京: 国防工业出版社, 2008: 181Liao Fujiang. Vacuum Electronics: the heart of information weapons and equipment[M]. 2nd ed. Beijing: National Defense Industry Press, 2008: 181 [14] 张承忠, 叶邦彦, 梁立东, 等. 基于高速摄影实验的小提琴琴弦三维振动特性研究[J]. 振动与冲击, 2015, 34(9):177-181,195Zhang Chengzhong, Ye Bangyan, Liang Lidong, et al. Video photography experiment on string vibration of violin[J]. Journal of Vibration and Shock, 2015, 34(9): 177-181,195 [15] 郑伟伟, 李俊科, 杨丽娜, 等. 弦振动实验的改进[J]. 物理实验, 2011, 31(2):43-46Zheng Weiwei, Li Junke, Yang Lina, et al. Improvement on string vibration experiment[J]. Physics Experimentation, 2011, 31(2): 43-46 -
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