The Research Of Battlefield Scene Simulation Based On OSG

With the rapid progress of Informatization, modern wars have become multidimensional wars under high-tech conditions.The battlefield becomes very informative and electromagnetic environments become increasingly complex. The main course of the evolution from winning the air control to winning the control of electromagnetic power and information is the dependency of modern weapons and accurate operational command on electromagnetic environments. Accurate analysis of complex electromagnetic environments and the display of intuitive three-dimensional situation concern the precise operational command directly, thus affecting the success or failure of the war. Therefore, processing associated virtual battlefield electromagnetic environments simulation really counts.As for the area of electromagnetic simulation, based on analyzing the theory of electromagnetic simulation deeply, this thesis simulates battlefield electromagnetic environments by using OpenSceneGraph(OSG) three-dimensional rendering engine. The main aspects are:The comparison between electromagnetic wave propagation models. This thesis mainly analyses the use of COST 231 model, Okumura-Hata model and ITM model, and considers the terrain environment and atmospheric environment as well. By comparing the frequency, path length, atmospheric conditions and other factors, this thesis selects ITM model to calculate the spread loss of electromagnetic waves.The research on radar detection range. Through the study of radar detection equation, the thesis proposes that the maximum detection range of radar is the maximum distance detected by using antenna main lobe in all directions taking into account the influence of topography on the propagation of electromagnetic waves and connects these discrete areas into a closed geometry by using algorithm.Realizing three typical kinds of electromagnetic coverage in the three-dimensional environments. Electromagnetic coverage mainly considers the Electromagnetic antenna pattern, the transmission power, the path loss of electromagnetic wave caused by the topography. Based on profile, cross-section and spherical surface, this thesis reflects the electromagnetic distribution in three-dimensional space.Realizing the calculating of SNR in three-dimensional environments. This research sample uniformly in the distance and arc length to improve the accuracy and address the problem of vertex inconsistency and boundary, and ultimately realize the calculating of SNR in three-dimensional area by using direct volume rendering method. Simulation results are drawn in the real three-dimensional map.The depth of the color in the graphics represents for the intensity of interference. From red to blue, the degree of interference decreased.