基于笼屉结构的机载高能激光系统光学中舱温度适应性研究  

Temperature adaptability of optical middle cabin of airborne highenergy laser system based on cage-type structure

作　　者：李响[1,2] 周晨 朱永奇 董科研[1,2] 高亮 安岩[1,2] 席文强[3] 刘玉海 Li Xiang;Zhou Chen;Zhu Yongqi;Dong Keyan;Gao Liang;An Yan;Xi Wenqiang;Liu Yuhai(College of Opto-electrical Engineering,Changchun University of Science and Technology,Changchun 130022,China;National and Local Joint Engineering Research Center of Space and Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,China;College of Mechanical and Electrical Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130022 [2]长春理工大学空间光电技术国家与地方联合工程研究中心,吉林长春130022 [3]长春理工大学机电工程学院,吉林长春130022

出　　处：《红外与激光工程》2024年第4期100-109,共10页Infrared and Laser Engineering

基　　金：吉林省教育厅产业化研究项目(JJKH20220751CY);吉林省重大科技专项课题项目(20230301002GX);科技部国家重点研发计划项目(2021YFA0718804)。

摘　　要：相较于车载、舰载设备,机载设备受体积及工作环境的限制,发展较为缓慢。针对机载设备的轻小型化要求,系统采用“光路堆叠”思想,提出笼屉式分层结构,实现了系统体积的要求。因光学中舱中包含精跟踪及主激光支路,温度变化时各支路间的光轴一致性难以保证,导致跟踪目标发生偏移,主激光支路无法对目标进行精确打击,严重影响系统的工作。为解决上述问题,对光学中舱进行有限元仿真分析,研究光学中舱在20±5℃情况下各镜片的变形。对镜片变形中影响光轴偏折的刚体位移进行提取计算,计算出单个镜片的偏转角度。根据反射棱镜安装误差理论对各支路间的光轴偏移量进行计算,分析精跟踪支路与主激光支路光轴一致性偏差。经过仿真分析,系统精跟踪支路与主激光支路光轴方位偏差为109.634μrad,俯仰偏差为132.952μrad。在实验室中进行25℃温度实验,结果表明,系统精跟踪支路与主激光支路光轴方位偏差为104.019μrad,俯仰偏差为125.009μrad,与仿真结果误差分别为5.40%、6.35%,验证了仿真结果的合理性。Objective The high-energy laser system is a directed energy system that realizes damage to a target by firing a high-energy laser beam at the target and generating a very high energy density on the surface of the target.Installed on a carrier aircraft,it can realize rapid detection and precise strike on the target by using the high mobility of the carrier aircraft,and plays an important role in the field of modern optoelectronic confrontation.The optical middle cabin is an important part of the high-energy laser system,and its main role is to realize the capture and tracking of the target.Due to the size limitations of the optical middle cabin for a typical small diameter cylindrical envelope,we can't use the traditional single-layer layout of the optical path,and put forward the"optical path stacking",cage-type layered structure(Fig.3),through the 45°mirrors layered transmission of the optical path,to solve the problem of the system volume is too large and meet the system requirements.However,the optical middle cabin contains the fine tracking and the main laser branch,and it is difficult to ensure the consistency of the optical axis when the temperature changes,it is necessary to simulate and analyze the optical middle cabin to explore the temperature adaptability of the optical middle cabin.Methods The optical-mechanical-thermal integration simulation analysis is carried out for the optical middle cabin,and the finite element simulation analysis model is established(Fig.4)to obtain the mirror distortion(Fig.5).Because the mirror deflection in the mirror distortion will cause the shift of the optical axis,the method of chi-square coordinate transformation is used to calculate the mirror deflection amount,and the mirror deflection amount of a single mirror is obtained(Tab.4).Later,the error transfer matrix of the optical axis by mirror deflection is proposed according to the theory of prism mounting error transfer matrix,and the deflection amount of each mirror is brought in to obtain the azimuthal deviation of

关 键 词：高能激光系统 笼屉结构 稳态热分析 刚体位移 光轴一致性 

分 类 号：TH741[机械工程—光学工程]