Nera Space Targer Tracking Algorithm Research

In recent decades,with the continuous development of aerospace technology,many countries have gradually increased their investment and research into adjacent space vehicles,which have typical characteristics such as high speed and strong mobility.Nowadays,all the worldwide powerful countries regard the adjacent spacecraft as the key research object,especially the method to achieve effective high-precision tracking of adjacent space targets has important theoretical significance and practical application value.Based on the introduction of the principle of maneuvering target tracking,this paper mainly studies the tracking algorithm of adjacent space targets.The main work is as follows:Firstly,the basic principles of target tracking and the specific background and practical research significance of the problem of near-space target tracking are briefly summarized.The research status of target motion characteristics,tracking model and tracking filtering method at home and abroad are summarized.Next,the definitions of several coordinate systems and the mutual conversion between coordinate systems are given.Based on this,the motion equations of the target and the observation information of the sensors are derived.In order to achieve high-precision tracking requirements,this paper first designed a HTV-2 tracking algorithm based on Singer model.A brief introduction to several typical target tracking models is presented.In the specific design of the filtering algorithm,the target motion equation and the measurement equation based on the target motion characteristics are first established under the corresponding reference coordinate system.Then according to the form of motion equation of HTV-2,the appropriate target maneuver model is selected,and the specific state equation of the target under the maneuver model is given.Finally,the tracking filter is derived based on the extended Kalman equation of state and the measurement equation.Simulation results demonstrate the effectiveness of the proposed tracking algorithm.Finally,in order to improve the tracking accuracy,this paper designs an improved HTV-2 tracking algorithm.Three new state variables related to aerodynamic parameters were introduced when designing a new tracking algorithm,and a new improved nonlinear maneuver model was established.Based on the model,an extended Kalman filter is designed.On the basis of a brief introduction to the uniform speed turning maneuver model,the effect of the target tracking algorithm based on the uniform speed turning model is compared.The simulation results show that the improved maneuvering model can achieve better tracking effect.It overcomes the shortcomings of traditional algorithms that are difficult to predict acceleration changes due to unknown target aerodynamic parameters,thus achieving accurate tracking of adjacent spatial targets.At the end of the article,we have made a simple outlook on the unsolved problems in the field of near-space target tracking and the direction that can be broken.