Research On Self-organization Method Of Agile Satellite Mission For Ground Area

With the sustainable development of space technology,people are increasingly dependent on satellite capabilities,and the number of tasks performed by satellites on a daily basis is increasing.To perform these tasks more effectively,it is necessary to research the method of planning task.The main purpose of the satellite task planning is to assign appropriate missions to the appropriate satellites for better performance in the case of the limited satellite resources.The task requirements are often blurred and far from the specific instructions.The method of assigning tasks after pre-processing needs to consider the constraint limits of multiple satellite loads.By the increased agility of the satellite,such approach makes the process harder to solve the problem.The paper uses a task-organized approach to perform such an advanced fuzzy task.The method regards the satellite system as an agent that can perform task planning and execution.According to its ability,the satellites perform tasks and realize complete execution of tasks through limited communication.Firstly,the research status and trend of development of the satellites' task allocation are introduced in detail,and some of the knowledge used in this paper in the current research is clarified.The task self-organization research is carried out on the basis,and clarify the principle and applicability of the task self-organization.Second,model the satellite system.In this paper,the satellite needs to consider its own special characteristics when performing tasks.Therefore,the common coordinate system and its transformation,satellite imaging principle,task constraint and track recursion formula for satellite on-orbit missions are elaborated.Based on the problem hypothesis and simplification,a model of the satellite mission self-organizing system is established to perform task self-organization.After that,research was conducted on multi-satellite observation missions.Establish the observation resource model.The single satellite constructs the income function according to the task requirements.The greedy algorithm with the highest benefit is used as the decision method of the single satellite.The satellite system realizes the indirect communication by establishing the pheromone concentration map obtained by the task area model,and clearly observe the task self-organization implementation process,analyze the typically dynamic task response problem and to give a solution.The effectiveness and applicability of the method are verified by design simulation experiments.Finally,research on multi-star collaborative search tasks.The escaping situation of the task in the overlay search problem is analyzed,and the back-seeking search model is established for the single satellite to perform the search task.The different situations in the multi-star collaborative search task are analyzed,and a multi-star side-by-side search model and a continuous transit satellite search model are established to realize multi-star cooperation in different situations.The pivotal input in the model analyzes the impacts of the execution task result,and gives the parameter selection scheme according to the task requirements and clarifies the task self-organization process,and verifies the effectiveness of the method under typical conditions through simulation.