机载光电平台隔振系统振动耦合分析

摘要/Abstract

摘要：

为避免载机线振动耦合为光电平台角振动，减小角振动对成像质量和指向精度的影响，对机载光电平台隔振系统进行了分析与研究。针对以往单自由度振动模型仅能分析线振动衰减，无法分析线振动与角振动耦合的缺点，建立了隔振系统的双自由度振动模型，推导出载机线振动与光电平台角振动间的传递函数，分析了减振器刚度、阻尼参数偏差以及减振器布局不合理对振动耦合的影响，为隔振系统的设计和安装提供理论基础。结合工程实际，提出了减小光电平台隔振系统振动耦合的具体措施。

关键词: 隔振系统, 振动耦合, 双自由度模型, 传递函数

Abstract:

In order to prevent translational aircraft vibratory disturbances from transforming into angular vibration of optoelectronic pod and reduce the influences of angular vibration on the image quality and accuracy of line-of-sight(LOS), a passive isolation system was analyzed and developed. For the point that angular vibration transmissibility could not be analyzed with the model of single degree of freedom, a mathematical model of two degree of freedom vibration isolation system was established. The transfer function between translational aircraft vibration and rotational responses of optoelectronic pod was derived. The coupled vibration in isolation system with stiffness error , damping error and unreasonable layout were analyzed.These analyses provided theoretic basis for the design and assembly of the vibration isolation system. Finally, combining engineering practices, the methods to reduce angular vibration from aircraft linear vibration were proposed.

Key words: vibration isolation system, coupled vibration, model of two degree of freedom, transfer function

中图分类号:

O328

杜言鲁, 丁亚林, 许永森, 聂品. 机载光电平台隔振系统振动耦合分析[J]. 中国机械工程, 2015, 26(21): 2880-2884.

Du Yanlu, Ding Yalin, Xu Yongsen, Nie Pin. Analysis of Coupled Vibration in Isolation System for Airborne Optoelectronic Pod[J]. China Mechanical Engineering, 2015, 26(21): 2880-2884.

参考文献

[1]贾平，张葆．航空光电侦察平台关键技术及其发展[J]．光学精密工程, 2003, 11(1): 82-87．
Jia Ping, Zhang Bao. Critical Technologies and Their Development for Airborne Opto-electronic Reconnaissance Platforms[J]. Optics and Precision Engineering, 2003, 11(1): 82-87.
[2]范国滨，贾建援，陈贵敏，等．机械振动对光学系统指向精度的影响[J]．中国机械工程，2005，16(2)：104-111．
Fan Guobin, Jia Jianyuan, Chen Guimin, et al. Vibration Effects on Pointing Precision of Optical System[J].China Mechanical Engineering, 2005, 16(2):104-111.
[3]李玉龙，何忠波，白鸿柏，等．角振动对光学成像系统传递函数影响分析[J]．中国机械工程，2012，23(15)：1784-1788．
Li Yulong, He Zhongbo, Bai Hongbai, et al. Analysis of Influences of Angular Vibration on MTF in Optical Imaging System[J].China Mechanical Engineering, 2012, 23(15):1784-1788.
[4]刘家燕，程志峰，王平．机载光电吊舱橡胶减振器的设计与应用[J]．中国机械工程，2014，25(10)：1308-1312．
Liu Jiayan, Cheng Zhifeng, Wang Ping. Design and Applications of Rubber Shock Absorber in Airborne Photoelectric Pod[J].China Mechanical Engineering, 2014, 25(10):1308-1312.
[5]姜伟伟，徐治洲，任戈. 机载光电成像设备减振系统仿真及试验[J].噪声与振动控制, 2014, 34(3)：186-189.
Jiang Weiwei, Xu Zhizhou, Ren Ge. Simulation and Experiment Validation of the Vibration Absorbing System of an Airborne Photoelectric Imaging Equipment[J]. Noise and Vibration Control, 2014, 34(3):186-189.
[6]赵鹏，杨牧，张葆．航空机载光学设备的振动分析及座架减震器的设计[J]．光学精密工程，1997，5(3)：58-63．
Zhao Peng, Yang Mu, Zhang Bao. The Vibration Analysis and Damper Design of Optic Instrument in FlyingPlatform[J]. Optics and Precision Engineering, 1997, 5(3): 58-63.
[7]董斌，丁亚林，田海英，等．新型航空光学遥感器减振结构设计[J]．光学精密工程，2008，16(12)：2454-2459．
Dong Bin, Ding Yalin, Tian Haiying, et al.Design of Vibration Absorbing Structure for Aerial Remote Sensor[J]. Optics and Precision Engineering, 2008, 16(12): 2454-2459.
[8]李玉龙，何忠波，白鸿柏，等．光电吊舱无角位移被动减振系统研究[J]．振动与冲击，2012，31(16)：88-91．
Li Yulong, He Zhongbo, Bai Hongbai, et al.Non-angular Displacement Passive Vibration Isolation System for Optical Pod[J]. Journal of Vibration and Shock, 2012,31(16):88-91.
[9]刘树峰，白鸿柏，李冬伟，等．光电平台新型隔振机构设计[J]．机械设计，2012，29(2)：16-19．
Liu Shufeng, Bai Hongbai, Li Dongwei, et al.Design of a Novel Damping Mechanism for the Opto-electronic Platform[J]. Journal of Machine Design, 2012, 29(2):16-19.
[10]王平，张国玉，刘家燕，等．机载光电吊舱无角位移隔振设计[J]．红外与激光工程，2012，41(10)：2799-2804．
Wang Ping, Zhang Guoyu, Liu Jiayan, et al.Irrotational Displacement Vibration Isolation on Airborne Optoelectronic Pod[J]. Infrared and Laser Engineering, 2012, 41(10):2799-2804.
[11]丁文镜．减振理论[M]．北京：清华大学出版社，1998．
[12]Toole J O. Passive Vibration Isolation for Long Range Aerial Reconnaissance Systems[J]. Proceedings of Society of Photo-Optical Instrumentation Engineers,1980，250:77-86．
[13]纽兰 D E．随机振动与谱分析概论[M]．方同，黄嘉璜，朱位秋，等译．北京：机械工业出版社，1980．
[14]Held K J, Robinson B H. TIER Ⅱ Plus Airborne EO Sensor LOS Control and Image Geolocation[J]. IEEE Aerospace Conference Proceedings,1997，2:377-405．