车载光电稳定平台结构设计与优化

	车载光电稳定平台结构设计与优化
	刘长顺
学位类型	硕士
导师	郭劲
	2014-07
学位授予单位	中国科学院大学
学位专业	光学工程
摘要	车载光电稳定平台是安装于移动车辆上的承载光电设备的平台系统，用于隔离载车行进中带来的各种干扰运动，使安装在上面的光电设备相对于惯性空间保持基准稳定，保证设备的正常工作。本文设计了具有高精度、大承载、上装多任务载荷、轻量化和小型化等特点的车载光电稳定平台，为红外告警等设备正常工作提供了基准，对设备的高精度目标探测与引导起到了关键作用。首先，介绍了稳定平台系统的组成，完成平台的结构总体布局设计。根据承载重量及轴系精度要求，对轴承进行详细分析和校核，完成轴系设计。通过对电机及测角单元的常用类型的对比介绍，确定相应的型号。针对平台的使用环境要求，完成平台的动静密封设计。其次，运用有限元分析软件MSC.Patran对关键件外框架进行结构分析，找出结构薄弱环节，并依据有限元分析结果，从两方面对外框架提出改进方案，包括结构的局部加强和筋结构优化等，对外框架进行结构优化改进。改进后的结构刚度有了很大提高，有限元分析结果令人满意。最后，对稳定平台的零件结构进行了简化处理，并对其进行整体的模态分析，得到平台的整机模态结果。通过分析振型和固有频率，判定稳定平台整体刚度与动态性能均满足要求。
其他摘要	The vehicle-based stabilized platform installed on the moving vehicle is load bearing platform system of photoelectric devices, used for isolating carrier of all kinds of interference in the movement. The platform ensures the photoelectric devices equipped in benchmark stability relative to the inertia space, and it works normally. The vehicle-based stabilized platform is designed with the advantages of high precision, large load bearing, multitasking loads, light weight and miniaturization etc. The platform providing a baseline workplace to devices such as the infrared warning system, play a key role for high precision target detection and guidance devices. Firstly, according to the mission requirements, the architectural structure concept is determined and then introduces the compositions of the stabilized photoelectric platform to complete the layout structural design of platform. The set of axes are designed based on the load capacity and the precision requirement of axis with the detail analysis and checking. Through comparing the common types of the electric motor and the angle measurement element, the corresponding type is determined. The design of dynamic and static seal is completed through the environmental requirements of the platform. Then, the critical parts of outer frame is be analyzed by the finite-element analysis software MSC.Patran to find the weakness of structure. According the analysis results, the optimal projects of the outer frame are presented from two sides, including the local strengthen of structure and the veins structure optimization. After the structural optimization, the structural rigid has been quite improved and the finite-element analysis results are desirable. Lastly, the simplification is made for the component structure of the stabilized platform, and the modal analysis is also conducted for the whole structure, which the modal results of the whole unite is obtained. Through the analysis of vibration mode and the natural frequency, the rigid and dynamic properties of the stabilized platform all satisfy the requirements
语种	中文
文献类型	学位论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/41444
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	刘长顺. 车载光电稳定平台结构设计与优化[D]. 中国科学院大学,2014.

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