Research On Process Model Based Framework Of General Missile Design Optimization And Its Key Technologies

The information war environment accelerates the changes of missile operating ways, and demands missile general design focus on the balance among performance, cycle, cost, adaptability and reliability. The researches of homeland and overseas show that multidisciplinary design optimization (MDO) is an effective approach to satisfy above demands. However, there are some problems in the domestic missile general optimization design, which restrict the application of MDO and influence the improvement of efficiency and quality of general optimization design. For example, the heterogeneousness of different disciplines makes it difficult to exchange data among disciplines, the tight couplings between optimization method and problem make it difficult to meet the needs of MDO and determine suitable optimization method, and the execution of optimization process is not flexible enougth to meet the variable schduling needs.These problems can conclude as theorical problems that belong to process modeling of general optimization design, evaluation selection of optimization method and general optimization design process scheduling. The process modeling is the key of problems, which are closely interrelated with evaluation selection of optimization method and optimization design process scheduling. The variable discipline applications and optimization method are primary components of optimization design process, which both have influences on the evaluation selection of optimization method. The optimization design process scheduling needs deal with interaction relations among discipline applications and its scheduling object is just the optimization design process.Using the reference of process modeling idea of concurrent engineering, contemporary integrated manufacture system and virtual prototyping, this thesis makes an in-depth research on missile general optimization design framework based on process model, as well as corresponding key technologies. The above problems would be resolved to certain extent and the efficiency and quality of missile general optimization design would improve. The innovations of this thesis include following four parts:(1) Aiming at fundamental problems in missile general optimization design, this thesis proposes missile general optimization design framework based on process model for the first time, which divides general optimization design process into three parts that are process modeling, design exploration and process automation. Moreover, this theis also presents the reference process of the framework, as well as reference view of each part. The framework would provide methodology guide for missile general design engineers and promote the improvement of efficiency and quality of missile general optimization design. (2) Aiming at the characteristics of general optimization design process, such as multidisciplinary applications, variable interaction relations and multiple optimization methods, this thesis proposes the process model formalism of general optimization design that provides abstract description for design application, data interaction relation and optimization method, as well as the optimization method component inferface specification and the runtime formalism. This thesis also presents the process modeling architecture of general optimization design, which can assist in building the process model. The process model of general optimization design would provide support for design data exchange among disciplines and promote the improvement of efficiency of missile general optimization design.(3) In order to meet the needs of evaluation selection of optimization method, this thesis proposes the selection method of optimization method based on applicability evaluation and optimziation strategy. The core idea of method is to separate optimization problem definition from optimization method selection. This thesis presents evaluation selection process of optimiztion method based on design exploration plan. Based on process model of general optimization design, this thesis presents a quantitative applicability measure to evaluate the applicable extent of optimization method to problem. Combined with optimization strategies, this thesis also presents the multiple method selection schema and corresponding process. The method would promote the improvement of efficiency of missile general optimization design.(4) Aiming at variable scheduling needs of general optimization design, this thesis proposes the directed graph based general optimization design scheduling method using the reference of graph scheduling in parallel computing area. This thesis proposes the transformation mapping from process model of general optimization design to the directed scheduling graph model, and expounds the special dealing with conditional relation, feedback relation and nested relation. Using the reference of classical directed graph search algorithm, this thesis presents the two-step scheduling algorithm, which includes pre-scanning step and main scheduling step. The method can support the automatic execution of general optimization design process, and promote the improvement of efficiency of missile general optimization design.The research of this thesis would enrich the methodology of systems engineering and missile general optimization design, and promote the development of missile general optimization design at homeland. It would provide theoretical guide and tool support for missile general design engineers, and be beneficial both from theoretical and practical perspectives.