Research And Implementation Of Performance Evaluation Platform Based On Deep Space Exploration Navigation System

Deep space exploration is an important aerospace activity in the 21 st century.Due to the long navigation time of the spacecraft,the complicated deep space environment and too many unknown factors,the astronomical angle of the autonomous navigation technology is adopted by the deep space exploration.Astronomical angle measurement of independent navigation technology with no time delay and high autonomy is very suitable for deep space exploration.At the same time,the application of nonlinear filtering in autonomous navigation technology is also very important significance,which can improve the performance of the navigation system.Therefore,the evaluation of the navigation system and its filtering performance is extremely important,and it is useful to choose the filtering method suitable for the particular navigation system in the deep space exploration task.In this thesis,taking the cruise section of deep space exploration from earth to the Mars as the background,through the construction of a navigation evaluation system,simulation astronomical angle navigation system,using EKF,EKPF,UPF to optimize the navigation system,finally,the influence of the navigation filter algorithm on the performance of the navigation system is evaluated by the evaluation algorithm,and it is displayed in an intuitive graphical interface.The main work of this thesis is as follows:1.In this thesis,we study the principle of autonomous navigation technology of astronomical angle measurement,and analyze the orbital dynamics of the detector in deep space environment,and establish the system state equation and observation equation of astronomical angle measurement system.2.A set of performance evaluation algorithm system for deep space exploration and navigation system is proposed.Evaluation indicators mainly include accuracy,continuity,availability and real-time,this thesis analyzes the meaning of each indicator from the environment of deep space exploration,and it study the impact of each indicator on the performance of deep space exploration autonomous navigation systems.Finally,in order to consider each index comprehensively,an analytic hierarchy process(AHP)is proposed to determine the advantages and disadvantages of navigation filtering algorithm by modeling deep space exploration.3.Aiming at the environment of deep space exploration,a navigation evaluation software scheme is proposed.The graphical interface is based on QT,mainly to show real-time curves and navigation positions,velocity curves.Virtual reality is based on Unity3 D to implement detectors from Earth to Mars.Background program is based on C + + to achieve physical logic,astronomical angle navigation system simulation and EKF,EKPF,UPF and other algorithms.4.By simulating the Mars exploration cruise segment,adopting the navigation evaluation system,through the display accuracy,availability,continuity,real-time curve,and the analytic hierarchy process and the utility function of the assessment,finally,the conclusion is that UPF navigation is the best,followed by EKPF and EKF is the worst.