快扫光电稳定平台的有限元分析与优化

发布时间：2018-05-02 21:30

本文选题：光电稳定平台 + 有限元分析　；参考：《中国科学院研究生院（西安光学精密机械研究所）》2014年硕士论文

【摘要】：光电稳定平台是一种可以安装多种载荷精密设备。在军事和民用方面都体现非凡价值。军事方面诸如目标追踪、航空侦察与武器引导等；民用领域主要在地理测绘、电视直播、灾情勘察等。本文所涉及的光电稳定平台为机载设备。由于是机载的，所以要求在保证精度的情况下，质量要轻同时强度还要满足飞行环境要求，这对设备的设计提出了很高的要求。本文分析研究对象来自实际课题项目。文中建模与分析主要内容如下：首先对设备中常用的基础部件：轴承、齿轮、螺钉和减震器进行合理的建模与分析。对基础部件仿真与解析结果对比，确定建模的正确性。基础分析部分不仅为此项目提供了必要的参考数据，同时其分析方法对后续工程有借鉴价值。其次对平台的两个主要零件进行分析。对外框架进行分析，从而确定了不同的约束对模态的影响；对内框架以不同的材料进行了对比分析，同时考虑到材料的重量、强度、环境适应性、成本与加工难易程度等，最后确定选择镁合金材料。接着分析了线/角振动对像移的影响，，根据分析结果结合实际情况采取了消角位移的减振方案。参照无角位移原理进行三维模型的建立，通过ADAMS进行仿真。查看分析结果，可确定此减振方案的可行性。最后对总体进行仿真分析。在总体冲击分析时，分别分析了有无减震器时的冲击情况，说明减震器对冲击能量有着充分的衰减作用。但是以此减震器不足以使频率衰减到理想的要求，修改减震器参数，以使频率达到要求，从而可反推出减震器技术要求，方便减震器购买与定制。本文对某快扫光电稳定平台分部件系统与整体分别进行了分析。基础分析的建模合理可行，为以后别的项目分析提供一定参考。整体的平台结构的分析为平台的设计者与后期的生产实践提供指导作用。
[Abstract]:Photoelectric stabilization platform is a kind of precision equipment which can be installed with multiple loads. In both military and civilian aspects show extraordinary value. Military aspects, such as target tracking, aviation reconnaissance and weapon guidance, are mainly used in geographic mapping, live television broadcasting, disaster investigation and so on. The optoelectronic stabilization platform involved in this paper is airborne equipment. Because it is airborne, it is required to meet the requirements of flight environment under the condition of ensuring accuracy, light quality and strength, which puts forward a very high requirement for the design of the equipment. The research object of this paper comes from the actual project. The main contents of modeling and analysis are as follows: First, the basic components commonly used in the equipment, such as bearings, gears, screws and shock absorbers, are modeled and analyzed. The correctness of the modeling is determined by comparing the simulation results with the analytical results. The basic analysis part not only provides the necessary reference data for the project, but also has reference value for the subsequent project. Secondly, the two main parts of the platform are analyzed. The external frame is analyzed to determine the influence of different constraints on the modal, and the internal frame is compared with different materials, taking into account the weight, strength, environmental adaptability, cost and processing difficulty of the material, etc. Finally, the selection of magnesium alloy materials was determined. Then, the influence of line / angular vibration on image shift is analyzed. According to the analysis results and the actual situation, the damping scheme of angular displacement is adopted. The three-dimensional model is built according to the principle of non-angular displacement, and the simulation is carried out by ADAMS. Looking at the analysis results, we can determine the feasibility of this vibration reduction scheme. Finally, the simulation analysis of the whole system is carried out. In the overall impact analysis, the impact of the shock absorber is analyzed respectively, which shows that the shock absorber has sufficient attenuation effect on the shock energy. But this kind of absorber is not enough to attenuate the frequency to the ideal requirement, so the parameters of the absorber can be modified to meet the requirements of the frequency, so that the technical requirements of the absorber can be rebooted, and it is convenient to purchase and customize the shock absorber. In this paper, the component system and the whole system of a fast sweep photoelectric stabilization platform are analyzed. The modeling of basic analysis is reasonable and feasible, which provides a certain reference for other project analysis in the future. The analysis of the whole platform structure provides guidance for the designers of the platform and the later production practice.
【学位授予单位】：中国科学院研究生院（西安光学精密机械研究所）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535

【参考文献】