Structural Optimization Design And Performance Analysis Of Lightweight Impact Resistant Optoelectronic Carrier

The optoelectronic bearing platform is a device used to support and execute the motion functions of optoelectronic instruments and equipment.With the expansion of the application of optoelectronic instruments and equipment in areas such as vehicles,aircraft,maintenance and disaster relief,and robotics,higher performance requirements have been put forward for optoelectronic bearing platforms.Currently,characteristics such as impact resistance,lightweight,and reliability have become urgent issues to be addressed in the structural design of optoelectronic bearing platforms.Firstly,based on the investigation of existing similar products,three main structures were selected as optimization objects.After comparing the inherent modes and vibration patterns of the three main structures,the corresponding mechanical structures underwent topological optimization.By combining the impact test results of three 3D printed structural samples,the main structural form of a lightweight and impact-resistant optoelectronic platform was ultimately determined.Secondly,based on the optimized main structure and the performance requirements of the optoelectronic bearing platform,a "stepper motor-double involute backlash eliminator-load" transmission scheme was determined.The transmission structures of the horizontal and pitch parts of the optoelectronic bearing platform were designed,and the overall 3D model of the optoelectronic bearing platform was completed.Next,using the established overall geometric model,the finite element analysis model of the overall structure was created using ANSYS Workbench.By analyzing the stress-strain cloud map and natural frequencies of the optoelectronic bearing platform under impact vibration conditions,the dynamic performance of the overall structure of the optoelectronic bearing platform was evaluated.Finally,a lightweight design was carried out for the overall structure of the optoelectronic bearing platform.A comparative analysis was performed on different materials such as aluminum alloy,PVC,and 45 steel for the axial components of the optoelectronic bearing platform,assessing their impact on the platform’s mass and natural frequencies.Using the topology optimization tool in ANSYS,shape optimization was performed on the upper shell and local non-load-bearing parts of the optoelectronic bearing platform.A comparison of the finite element analysis results before and after lightweight optimization indicates that the proposed lightweight and impact-resistant structure of the optoelectronic bearing platform can reduce the overall weight while ensuring vibration and impact resistance performance.This thesis addresses the design requirements of a lightweight,vibration-resistant,and impact-resistant optoelectronic bearing platform.It adopts a top-down design approach of "main structure topology first,followed by detailed optimization" to achieve the design of a compact,lightweight,vibration-resistant,and impact-resistant optoelectronic bearing platform.The design method used in this thesis not only has practical engineering application significance for the development of optoelectronic bearing platforms but also provides certain reference value for the design of other similar products.