Optimization Design And Analysis Of Support Structure Of Compound Eye Camera

With the continuous development of photoelectric information acquisition technology single-aperture optical system scene collection is increasingly unable to meet the three-dimensional engineering needs of high-efficiency;imitating biological compound eye and replacing single-aperture optical system with multi-aperture optical system become a new project R&D and application direction.In order to achieve rapid and accurate external information acquisition and construct complex scenes,the structure design and optimization analysis of the support of compound eye camera mounted on the Unmanned Aerial Vehicle(UAV)flight system is performed in this paper.Taking into account the loading capacity of UAV itself and the requirement of compound eye camera imaging which is"large field of view and less redundancy",this paper combines theoretical analysis,structural modeling,finite element analysis,test verification and so on to achieve all-round lightweight and reasonable support structure of compound eye camera.The specific research contents are as follows:(1)Defining the structural design requirements in the compound eye camera design process,including determination of the carrying object,sub-eye selection,material selection,and the mechanical environment of the overall structure.The contact stiffness calculation equation is deduced with the contact theoretical model.A finite element model is set up to overcome non-linear problems of bolted connection and effectively reduce the error in structural analysis due to bolted connection in the finite element analysis process,thus improving the accuracy and efficiency of analysis.(2)Design and analysis of compound eye camera's frame structure.A method of determining the scale and layout of sub-eye camera based on multi-objective genetic algorithm is proposed.By using this method,a preliminary model of the frame structure of"six-eye"compound eye camera with 180~?×360~?large field of view can be successfully obtained;on the basis of preliminary model,lightweight holes and parametric modeling are used to reduce the mass of main frame structure;statics analysis and modal analysis are used to determine the feasibility of the optimized frame structure.(3)Design and analysis of pan-tilt-zoom(PTZ)structure.The topology optimization method is adopted and the mass and rigidity are used as constraints to achieve the lightweight structure of the entire PTZ support rod;meanwhile,a new shock-absorbing system is designed and the shock-absorbing effect of the structure is verified through modal simulation analysis and harmonic response simulation analysis.A compound eye camera support(including the frame and PTZ)is researched and developed and a prototype is assembled on the basis of lightweight structural design;the inherent and vibration characteristics of the whole structure is analyzed through modal test and vibration test and the correctness of shock-absorbing system based simulation calculation model is verified.(4)Testing and verification of imaging of compound eye camera system.The calibration test and image stitching test are carried out through the established imaging and calibration model;the"low error"three-dimensional scene based on image stitching is set up through operating the compound eye camera via the UAV and processing the feedback results,thus verifying the reliability and correctness of the structure system.