Non-cooperative Maneuvering Target Determination And Active Evasion Method

Based on the proximity operation of non-cooperative targets,this dissertation studies the non-cooperative target space-based search and identification,non-cooperative maneuvering target tracking filtering and escaping evasion strategy.The semi-physical simulation experiment is carried out to verify the above methods.The main achievements are summarized as follows.A space-based search method based on nonlinear uncertainty propagation for non-cooperative targets is proposed.1)Using the nonlinear uncertainty propagation method based on state transition tensor to solve the propagation of the relative state mean and covariance matrix and the transition of state space,the position error ellipsoid of the relative state space is converted into the angular error ellipse of the angle space;2)The step-by-step camera search strategy and the spiral rectangular camera search strategy based on the angular error ellipse of the angle space is designed.They are simple and intuitive,with clear search space,the dynamic changes of the non-cooperative target orbital position during the search process are considered,and then the applicability to the actual task is good;3)The effectiveness of the two search strategys is verified by simulation examples.The design and implementation of the step-by-step search strategy is simpler,and the spiral rectangular search strategy takes less time to discover targets.The filter estimation method based on current statistical model for non-cooperative maneuvering targets is studied.1)The probability density model of the maneuvering acceleration in the current statistical model,the stochastic process characteristics and the adaptive filtering algorithm are introduced.2)Combining the advantages of the current statistical model and the Jerk model,the current statistical Jerk model is developed and its adaptive filtering algorithm is derived.3)The validity of the current statistical model and the current statistical Jerk model is verified by simulation examples.For the position and velocity filtering values,the current statistical model is slightly smaller,while for the acceleration filtering value,the current statistical Jerk model is better.An active evasive strategy for escapers based on maneuvering target filter estimation is developed.1)An maneuver evasion strategy for maximizing the relative distance based on maneuvering target filtering information is developed.2)An maneuver evasion strategy for maximizing line-of-sight yaw rate based on maneuvering target filtering information is developed.3)The simulation results show that the evasive strategy of maximizing the relative distance can only prolong the capture time of the escaper,and the evasive strategy of maximizing line-of-sight yaw rate can effectively avoid the rendezvous threat of the chaser.The non-cooperative maneuvering target determination and active evasion ground semi-physical simulation experiments are carried out.1)Based on the similarity principle,the basic idea of the semi-physical simulation experiment is explained,and the experimental scheme flow is given.2)The non-cooperative target tracking filtering,search and recognition experiment,and the non-cooperative maneuvering target tracking filtering and spacecraft active evasive experiment are carried out on the experimental motion platform by designing length and time scale factor;3)The angle of the experimental motion platform and the distance measurement accuracy meet the experimental requirements,and it is feasible to verify the spatial proximity operation task on the experimental platform.The step-by-step,spiral rectangular camera pointing search strategies for non-cooperative target are effective.The filtering algorithm for non-cooperative maneuvering target tracking is effective.For the anomaly proximity of maneuvering targets,the evasive strategy based on maximizing the line-of-sight yaw rate is effective.The non-cooperative target on-orbit search camera pointing strategy,the active evasive strategy and the semi-physical simulation experiments can provide reference for the space non-cooperative target proximity operation tasks.