Study On The Near Field Effect Correction Model Of High Precision Multiple Elements

In modern warfare, with respect to the accuracy of the missile guidance increasingly high demand, RF loop Simulation System has been paid more and more attention by domestic and foreign scholars for its reliability, authenticity, flexibility, economy, security and other advantages. This thesis will discuss from the triples, which is a RF Loop Simulation System basic unit, to improve simulation accuracy of the simulation model, and finally to achieve the goals to improve the accuracy of the overall RF HILS(Hardware in Loop Simulation System).In this article, the main content includes: first of all, the working principle of RF HILS is introduced, one hand introducing the works simple exposition of the RF HILS, and on the other hand its composition structure is introduced. Then this thesis introduces three common control method of triples one by one, which focuses on the way later applied to the principles and theories of Poynting vector and the derivation method of the detailed analysis. Based on the study of the above, respectively, the control rule among the vector control methods of the triples were studied and verified in a later experiment. The error of the turntable occurred in the experiment was studied to ensure that the experimental results are accurate.In the study of triple vector control rule, this thesis is divided into two aspects: the feed amplitude and phase of each antenna elements effecting on the location of radiation target is discussed and analyzed. First, for a single variable, namely single feed amplitude or phase for RF range and impact for target position changes and trends are summarized. Then based on the study above, a further discussion for a number of variables affected the location of radiation target is done. Then simulation and physical verification software based on the FDTD were compared to verify the above work, respectively, and verify the results are analyzed and discussed. Ultimately narrowed the variation range of feed amplitude and phase of triples, reduced workload optimization, and improved the accuracy of the model object.For the discussion on the turntable error in RF HILS, combining with calculation error and the turntable error caused during the testing. Mainly analyzing how the eccentric lateral error of turntable caused by itself affects the accuracy of the test system. Analyzing the error of turntable mechanical uses a variety of coordinate systems, and the error circle concept was used in the analyzing the error of calculation, By this way, a method of estimating the effect of the error of calculation is given. Through the above method, can effectively improve the accuracy of the semi-physical simulation system, further improving the guidance precision.