Creation And Application Of The Natural Environment Database In Laser Semi-active Guided Simulation System

Information war becomes the main model of the military pattern nowadays.precision-guided weapons are playing a more and more important role.Precision-guided weapons especially semi-active laser-guided weapons,have a very high hit probability,advanced semi-active laser-guided weapons' hit probability can reach more than 85%.Finmeccanica of Britain recently completed the development of a new generation of semi-active laser-guided seeker which achieved high-precision laser capture and tracking,and the seeker can also provide "plug-and-play" precision guidance for air-to-ground weapons which currently do not have terminal guidance or require enhanced guidance accuracy.Semi-active laser guidance technology has been the most widely used in this field in China currently.It has advantages of high direct hit rate,good combat effectiveness,strong anti-interference ability,relatively low cost and reduced casualties.It is widely used in shell,missile,other weapons and equipment.China's AKD-10 missile is a weapon using laser semi-active guidance,it is the most advanced air-to-surface missile that our armed helicopters currently equipped.It has the bomb weight of 47 kg,the maximum range of 7 km,and the penetrating armor capacity of more than 1400 mm.No main battle tanks can resist its attack.The research and development(R&D)of laser semi-active guided weapons is extensive.If we can make it with computer simulation software instead of the experimental hardware part or all,we can greatly shorten the R&D cycle and reduce the R&D costs.In this paper,the project of virtual simulation system of laser semi-active guidance constructed with No.203 Institute of Ordnance Industry is introduced.The realization of virtual simulation system is introduced,and complex environment database of the principle and realization of environment modeling and loading module is studied emphatically.The specific work is as follows:(1)The atmospheric transmission characteristics of laser in complex electromagnetic environment are analyzed.Through the formula of the laser atmospheric transmittance,combined with the laser atmospheric transmittance calculation software,we can obtain the laser atmospheric transmittance data of some region and build a database with it.(2)The influence of the radiation intensity of the sunlight on the sensitivity of the seeker is analyzed.The relationship between the solar irradiance and the sensitivity of the seeker is obtained by linear fitting of the experimental data,and we also build the solar irradiance database of some region.(3)The laser radar cross sections of different combat targets are measured through the experiment,and the database is constructed.(4)Based on the target laser scattering characteristic database,the solar radiation database and the atmospheric transmission database,the atmospheric transmission software and the complex environment database software have been developed.