针对采用空间五点减振的捷联惯组系统,介绍了其总体设计方案,对减振 系统的固有频率进行了理论推导和模态仿真,对不同减振布局下捷联惯组的冲击响应进 行了分析。结果表明：对于空间五点减振的捷联惯组,其线振动固有频率不随减振器的 位置而改变,而角振动固有频率随减振器跨度的增大而增大;单独改变第5点减振器的 位置对调整系统角振动固有频率的作用有限,但可有效影响系统的偏心量,进而显著改 变IMU在冲击下的角振动响应幅值,较小的偏心量可以降低系统在冲击作用下的角振动 幅值;在系统偏心量不变的情况下,同步增加除第5点外的其余4个减振器的跨度,有 利于减少系统的角振动响应幅值。
Abstract
The integrated design of strapdown inertial navigation system (SINS) with spatial-five-vertices arrang- ment of isolators was introduced and the effect of five isolators’ arrangement and span on natural frequency and shock reaponse behaviour of SINS was studied. By using the finite element method(FEM), the model analysis results demon- strate that torsional vibration frequency increased with the span of isolators while linear vibration frequency doesn, t change. Though the adjustment of the fifth isolator position could not change torsional vibration frequency of system obviously, it modified eccentricity of IMU efficiently thus changed torsional vibration amplitude of IMU under shock condi- tion. On condition that eccentricity of IMU keeping constant, increasing the span of isolators except the fifth simultane- ously would decrease the amplitude of torsional vibration response.
关键词
捷联惯组 /
减振器 /
固有频率 /
冲击响应
{{custom_keyword}} /
Key words
SINS /
isolators /
natural frequency /
shock response
{{custom_keyword}} /
中图分类号：
V241.62
{{custom_clc.code}}
({{custom_clc.text}})
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 刘树林. 冲击与振动手册(第5版)[M].北京:中国石化出版社,2007.
LIU Shu-lin.Harris5 shock and vibration handbook (5th Edition) [M]. Beijing: China Petrochemical Press, 2007.
[2] 刘恒春. 捷联惯性导航减振系统研究[J].中国惯性技术学报,1995, 3(4): 29-33.
LIU Heng-chun.Research on damping system of strap- down inertial navigation[J], Journal of Chinese Inertial Technology, 1995, 3(4): 29-33.
[3] 张志蠢,张大伟.捷联惯组减振系统角振动、线振动赚频率趣仑分析[J].中国惯性技术学报, 2009, 17(6): 654-657. ZHANG Zhi-xin, ZHANG Da-wei. The theory analysis of INS’ s angular vibration, linear vibration formant frequency [J]. Journal of Chinese Inertial Technology, 2009, 17(6): 654-657.
[4] 付继波,马静,姚建军.弹性支撑惯导系统振动耦合问题研究[J].强度与环境,2005, 32(2): 46-51.
FU Ji-bo, MA Jing, YAO Jian-jun.Coulping vibration study on the elastic supported inertia navigation system[J]. Structure and Environment Engineering, 2005,32(2): 46-51.
[5] 颜肖龙,谢云.减振器的布置对耦合振动的影响[J].电子机械工程,1999, 82(6): 29_33.
YAN Xiao-long, XIE Yun.The effect of arrangement of isolators on coupled vibration[J], Electronics Machinery Engineering, 1999, 82(6): 29-33.
[6] 李俊峰,刘进, 唐献林.激光陀螺捷联惯性组合的系统结构抗震控制[J].中国惯性技术学报2006,14(1): 21-26.
LI Jun-feng, LIU Jin-jiang, TANG Xian-lin.Aseismatic control of system structure for laser strapdown IMU[J]. Journal of Chinese Inertial Technology, 2006,14(1): 21-26.
[7] 耿顺山. 机抖激光陀螺捷联姿态测量系统的减振技术研究[D].国防科学技术大学,2010.
GENG Shun-shan.Research on the vibration reduction of dithered laser gyro strapdown attitude & heading measurement system[D]. National University of Defense Technology, 2010.
[8] TUO Zhou-hui, HU De-wen, LI Ru-hua.Damping design of strapdown inertial navigation system[J]. Journal of Chinese Inertial Technology, 2009, 17(6): 648-650.
[9] 刘万里. 惯性测量组合减振系统动力学设计及实验研究[D] . 重庆大学硕士论文,2011.
LIU Wan-li.Dynamical sesign & experiment research of inertial measuring unit’ s vibration system [D]. Chongqing University, 2011.
[10] 周亚东,董萼良,吴邵庆,等.惯性导航平台角振动抑制技术[J],东南大学学报,2013,43(1): 60-63.
ZHOU Ya-dong, DONG E-liang, WU Shao-qing, et al.Restricting method for angular vibration of inertial navigation platform[J]. Journal of Southeast University, 2013,43(1): 60-63.
[11] Volk C, Lincoln J, Tazartes D.Northrop grumman's family of fiberoptic based inertial navigation systems, http://www. northropgrumman. com/Capabilities/LN251INS GPS/Documents/ln251 Position, Location, And Naviga-tion Symposium, 2006, IEEE/ION: 382-389.
[12] 朱石坚. 振动理论与隔振技术[M].北京:国防工业出版社,2006[M].
ZHU Shi-jian.Vibration theory and vibration isolation Beijing: National Defense Industry Press,2006.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(6306 KB)
