Study On Multi-Resolution Modeling In Spatial Mission Simulation

As an important research direction for advanced distributed simulation, multi-resolution modeling is characterized as an intersection of multidisciplinary and holds great promising for the spatial mission simulation whose scale is extending and complexity is increasing doubly. The dissertation starts with the relative theories, and focuses on the requirements of the spatial mission simulation. The key aspect of our research work is the approach of multi-resolution modeling and the methodologies of consistency analysis within multi-resolution models. In the last chapter, associated with the application of the the specific spatial mission simulation, realization technology of the multi-resolution modeling is researched.The research of the basic concept of the complex system modeling and simulation is first considered. After analyzing various viewpoints of the model resolution and multi-resolution modeling, the relative concepts based on the self-cognition and comprehension are summarized. concepts. From these researches we found the concept system of multi-resolution modeling within spatial mission simulation.The systemic research of multi-resolution modeling within the spatial mission simulation was made before the discussion of the concrete application. Upon the introduction of the system architecture, the urgent requirements of multi-resolution modeling technology within such a large-scale complex system is analysed in detail. In addition, the hiberarchy of the composing, entities and functions of the spatial mission simulation system is proposed.The formal description of multi-resolution modeling is important for understanding multi-resolution modeling deeply. Whereas there is no-one formal description specification of multi-resolution modeling at present, the analyse and comparison of current specifications are made firstly. It lays the foundation of the formal description for the direction of multi-resolution modeling research and the design of models. In succession, the dissertation analyses the three basic approachs (i.e. selected viewing, alternate submodels and IHVR) presented by Davis and Huber and some approachs (i.e. multimodel frameworks, object oriented physical modeler, multi resolution entity, etc.) that are derivations and combinations of these original definitions. Furthermore, the advantage and disadvantage of each approach are summarized. Whereafter, an approach of pseudo aggregation and, disaggregation based on domain analyse is proposed and its implementation process is introduced in detail, which is associated with the characteristics and requirements of the spatial mission simulation.In the study of the consistency analyse of multi-resolution models, a quantitative analysis method of consistency within multi-resolution model family based on statistical analysis and development of simulation graph models is offered. Then the analyse process of these two methods and the applicability to the multi-resolution model family of spatial mission simulation are discussed. A consistency qualitative analysis method, impact assessment, is offered likewise as a complementarity of the quantitative analysis.Finally, the runtime environment for spatial mission distributed simulation based on HLA is created after the analyse of the multi-resolution modeling applications in several typical simulation systems. A federation design supporting multi-resolution modeling is given, which includes the member's partition, the design of object class and interaction class, and the FOM design. Specifically, the concrete design and implementation of the multi-resolution modeling approach under this runtime environment is discussed.