Investigation On Multidisciplinary Design Optimization Technologies For Space Maneuverable Platform

Space maneuverable platform is a new type of spacecraft for space operations with high maneuver capability and smart payload capability. To satisfy the need of complex function, Space maneuverable platform is composed of multiply subsystems, which shows a serious interdisciplinary cross-coupling. Traditional sequential design method is difficult to obtain a high quality optimal design. Multidisciplinary Design Optimization(MDO) is an effective way to address interdisciplinary coupling and the complex design problems. Therefore, this paper presents a research of the MDO method, aims at developing an effective method for the conceptual design of space maneuverable platform.This paper can be divided into three parts: modeling, optimization procedure, integration and solving technology.Taking the space maneuverable platform of on-orbit serving class as the background, the first part studied the base scheme, which meet the mission and design requirement. The optimization problem was established of the space maneuverable platform conceptual design. And a new concept of velocity increment margin of unit mass is put forward, which is taken as the objective of MDO. According to the base scheme, the disciplines modeling progress is explored and the design structure matix is built.The second part conducts the research to the MDO solution strategy of space maneuverable platform. The typical decomposition methods and MDO architectures are analyzed and compared. According to the characteristics of the disciplinary model, the appropriate methods are introduced for the space maneuverable platform conceptual design. Firstly, the Design Structure Matrix(DSM) decomposition method based on adjacency matrix transformation is carried on to decompose the disciplinary model and reduce the feedback coupling variables. And then, the MDF solution architecture are used to coordinate the relationship of variables and organize the process of MDO.Based on above work, the third part applies the ISIGHT software to integrate the disciplinary model, define the MDO problems and solve them with the SQP optimization algorithm. The effect of different consistent convergence criteria in MDA on optimization result is studied, according to which, the right convergence criteria of space maneuvering platform multidisciplinary optimization is selected. The overall scheme obtained by using MDO method has better performance than the initial scheme, which proves that the application of MDO method to carry on the conceptual design of space maneuvering platform is necessary and effective.