Research On The Key Technologies In Multidisciplinary Integrated Conceptual Design Environment For Missile

Missile possesses political and economic values as an instrument of war. The fierce battle and market competition have raised on the one hand more performance requirements, such as stealth, hypersonic etc., and on the other hand more stringent design requirements, such as high-quality, low cost, short cycle, which has posed a severe challenge to the development of missiles. The traditional design method is getting difficult to meet the needs of missile development under the new situation, which leads to an urgent need to the development of innovative technologies and design methods. For this reason, the multidisciplinary integrated conceptual design method for missile and its support system are studied around the top frame architecture, product model, multidisciplinary collaboration technologies, optimization strategies and system construction. Aimed at breakthroughs in key technologies, a Multi-disciplinary Integrated Missile Concept Design Environment(MIMCDE) is designed and constructed, to promote the improvement of missile design standards, and provide a reference for the designs of other air vechiles.The thesis is organized as follows:The top architecture of MIMCDE is proposed and establis hed. Through analyzing the intrinsic defects existing in the traditional missile design, the method of multidisciplinary integrated conceptual design for missile is proposed. Based on its basic characteristic, the corresponding architecture characteristics for the support system have been proposed, and finally the system architecture of MIMCDE is established.The multidisciplinary integrated product information model for missile based on ontology is proposed and established. By introducing ontology into the missile product model construction to make up for the inadequacy of various common product models, a four- layer architecture product information modeling method is proposed. Meta-ontology is abstracted based on the most common concepts in the field of missile design and the relationship between these concepts. Domain models including the structure model, resource model and process model and k nowledge model are constructed based on the meta-ontology. Finally, a four-step implementation framework for the product information model is set up.The theory, model and methodology about the multidisciplinary collaborative in missile integration design are studied and put forward. 1) Based on the multidisciplinary integrated product information model, a semantic-driven integration model of multidisciplinary application-Information Translator is proposed, whose function is implemented by two members of information filter and information organizer. 2) A control flow scheduling method is established based on the reconstruction of the DSM. With the target of minimizing the sum of inverse feedback bandwidth, DSM is optimized by genetic algorithm(GA) to realize the reconstruction process. An execution algorithm is developed to impret the reconstructed DSM to obtain the optimal scheduling policy for multidisciplinary application control flow.The theory, model and algorithm of optimization strategy for missile multidisciplinary integrated design are studied and put forward. An estimation method of the gaussian kernel width based on the density of sampling points and the moment analysis is presented, which can be applied to the surrogate models of Kriging function, the radial basis network and support vector regression. Based on the approximate models and the adaptive sampling strategy, a sequential approximation optimization algorithm(SAO) is established. The surrogate models employ the estimation method of gaussian kernel width proposed in this paper, which presents a good performance with respect to inhomogeneous distribution of sampling points. The adaptive sampling strategy is put forward to balance the exploration and exploition in the optimization process, which provides the optimization algorithm the abalities of the global optimization and the high convergence efficiency. The support vector machine classifier(SVC) is introduced into the SAO algorithm for the first time. An enhanced SAO is established based on the SVC to eliminate a large amount of invalid computation, avoid a waste of computing resources and improve the design efficiency.Through the application of the above research results, a complete, efficient and practical multidisciplinary integrated concept design environment for missileMIMCDE is designed and established, in which the overall architecture of the environment, the software platform, the supporting hardware and the function modules are constructed. The benchmark test case of a ground-to-ground tactical missile verifies the the correctness, validity and feasibility of the proposed theories, methods and the environment established in this thesis.