Research On Improving Angular Motion Characteristics Of Two-axis Optoelectronic System

Optoelectronic stabilized sighting system is an effective equipment for target detection,recognition and pointing and tracking,which plays an important role in the precision guide equipment.It has been widely used in warplanes,tanks,warships and other platforms.Due to the limitation of the field of view and the improvement on speed of the target and the platform with relative high-speed motion,the stabilized sight system under the condition of high speed turning faces severe challenges on the pointing characteristics of optical axis.Domestic and foreign related technologies are summarized,the principle of traditional two-axis optoelectronic system is analyzed in the thesis.This thesis concentrates on optimizing the structure of the traditional two-axis optoelectronic system to improve the accuracy of the photoelectric system tracking and positioning.The method to improve the structure of optoelectronic stabilized sighting system is put forward,so as to ensure the stability of the optoelectronic system under the condition of high speed turning.The performance of optimized optoelectronic system is verified by simulation and the validity analysis is done,the character is greatly improved.Good tracking and positioning and high stability are realized for optimized optoelectronic system under the condition of high speed turning.Aimed to improve the character during high-speed turning of two-axis optoelectronic system,the following research work is done in this thesis:Firstly,the background and significance of optoelectronic system are introduced,and the factors that affect the high speed switching performance of optoelectronic system are analyzed,as well as the current research situation at home and abroad.Secondly,the composition and principle of photoelectric stabilization system are studied.The comparative characteristics of the existing two-axis optoelectronic system and the improved angular motion system are analyzed,and the shortcomings are pointed out.Thirdly,according to the relevant data and combined with the mechanics theory,a certain type of two-axis optoelectronic system is improved and presented by Autocad and UG software.Finally,based on finite element theory and ANSYS Workbench software,the design of two-axis optoelectronic system is simulated and verified by statics,modal and harmonic response analysis,and the validity of the designed structure is analyzed by combining the theory of spherical geometry and so on.After analysis and verification,the performance of the improved photoelectric system has been greatly improved.realizing that photoelectric system has high tracking and positioning performance and high stability.The two-axis photoelectric system optimized in this thesis have the advantage of remaining high pointing accuracy under the condition of high speed turning.An effective method is provided to improve the angular motion characteristics which two axis optical system can bear.It can be widely used in all kinds of needs of the weapon platform.It can provide powerful help for optoelectronic system to realize high speed and precise turn function to meet the target’s precision strike or defense.