The High Precision Photoelectric Stabilized Platform Research

The high precision photoelectric stabilized platform is fixed on the weapon system. The line of sight direction and measurement precision of the photoelectric equipment are influenced by not only the gesture changes such as low frequency and large amplitude ship swaying, but also the artillery high speed movement especially the weapon system impact produced by high rate of fire. So, in order to realize the stability of the line of sight, the high precision photoelectric stabilized platform must be able to operate stably in different kinds of external disturbance conditions.The main research shown as follow:Firstly, after researching the structure overall technology of the high precision photoelectric stabilized platform in order to confirm a correct and feasible structure overall scheme, completed the platform structure overall layout design, determined the overall physical size of the main components, made clear the relative position of the relations, the connection method of installation and the electrical transmission form etc in the various components, and laid the foundation for3D modeling. Secondly, implement the digital modeling and generated the3D entity model. Thirdly, implement finite element grid partition and confirm the load and boundary conditions by using the finite element analysis system on the basis of the3D model, then implement static analysis and modal analysis to get the basic parameters and the stress, the strain, the inherent frequency etc of the main components of the pitching and bearing mechanism. Fourthly, optimization design the shaft-system form of the bearing mechanism according to the previous analysis results, then process the optimized structure by the finite element analysis to determine the shaft system structure of the bearing mechanism. Finally, implement modal analysis and impact respond analysis to get the first eight modal vibration mode and the response results of the overall high precision photoelectric stabilized platform. By means of the finite element analysis, several conclusions can be reached:1) The pitching mechanism shafting torsional rigidity meet the requirement which is not less than400Hz, and the resonance frequency deviate from the disturbance frequency, meet the system application requirements.2) The optimized bearing mechanism shafting torsional rigidity meet the requirement which is not less than200Hz, and the resonance frequency deviate from the disturbance frequency, meet the system application requirements, and there’s no local structure resonance.3) The photoelectric stabilized platform strength meet the requirement that the platform can work well in the ship and artillery disturbance conditions, the resonance frequency and the rigidity meet the overall rigidity requirement, the resonance frequency deviate from the disturbance frequency, the resonance phenomenon won’t happen.4) The photoelectric stabilized platform can adapt to a certain type of the weapon system.Through the finite element analysis of the main components and overall unit of the high precision photoelectric stabilized platform, the research provided some reference for the subsequent design, production and application of the photoelectric stabilized platform.