Research On Technology Of Initial Alignment And Inertial Device Calibration Off The Lunar Surface

This article in view of the ballistic missile target, firstly analyzes the target of thecampaign model, and then USES the many kinds of filter method to the target of thecampaign to filter, analyze the target motion state, and then will be relatively accurateparameter as forecast the initial value, on trajectory forecast, the calculation of the flightpath that target point range.The first part of this text first to paper introduces the background and significance.And the investigation and study to the domestic and international radar tracking of theballistic missile and ballistic forecast, the development situation of the development ofthe history and current be introduced. In order to determine the structure of the paper aswell as basic research.In the second, the mathematic models established to get the target trajectory. Firstly,this paper shows the coordinate system, and the different coordinate systems cantransform to each other. And then, the radar coordinate was established in order to buildthe dynamics equation. As the results, the target motive will be analysis carefully. Thedynamics density ranged models was established under the1000km. at last, the dynamicsmodels simulated and improve the accuracy.In the third part, mainly discussed the models so that can obtain the radar tract thefilter, in common situation, hose the target position and the velocity. In this paper, g thedrag ratio is increased and extended the Kalman filtering are calculated the filter. TheKalman filter is designed in detail. At the same time, the information can obtain andsimulate as well.In the fourth part, the orbit prediction model was established. Standard ellipsetrajectory adapted which aim to quickly prediction and calculate the setting point withoutconsidering the atmosphere drag. Firstly, predict the initial value to calculate the orbitalelements, then the trajectory prediction can obtain. At last, the reentry angle, alarm timeand the direction of the setting point also can get. In order to analysis the predictioninitial values accuracy and solve the influence of the about launch point, we use theMonte Carlo method to obtain the great scope setting point. Finally, the simulation isestablished.