The Key Technology Research Of Improving Precision Of Thermal/Structural/Optical Integrated Analysis

The technique of Structure-Thermal-Optic performance integrated analysis and design(referred as STOP)for space camera is the latest improved application of the system engineering, which analysis accuracy is a threshold for further development. This thesis carried out related research work with the goal of improving accuracy of STOP and making a breakthrough on a methodology of STOP application and test verification technology.The research found that improving analysis accuracy of STOP which applied on the space camera design included several key points:1) Space camera STOP analysis accuracy enhancement, relies on the design method analysis with STOP, which from the point of view of system engineering, need control and improve the integrated analysis of optical mechanical, thermal discipline and interdisciplinary.2) Distortion affecting the optical performance of the space camera in orbit, due to thermal loading is a significant error source. That theory research and simulation methodology for thermal stress is important to mine the space camera mechanical and optical performance and basis for its optimization.3) The constraints design and management guidelines for STOP integrated analysis are the foundation to improve its analysis accuracy. The processed frameworks of STOP integrated analysis ensure reasonably, effectively, orderly implementation within subject and between subject model, boundary conditions and optimization object.4) STOP model verification method is a key means to improve analysis accuracy, which depends on not only the control of the simulation analysis process, but also the study of test technology and methodology.In order to solve the above key problems, the research work of this thesis has the following innovation:a) Bases on the theory of system engineering, the method of setting same absolute coordinates as the optical,thermal and structure model is proposed, which solve the problem of accurate and fast registration to different software and models.b) The STOP integrated analysis method was put forward to verify the temperature adaptability of the optical design, and the effect of the relative temperature on the different surface was obtained directly. Solving the complicated calculation process and hard realized by theoretical formula that the influence of temperature on the two times, higher order surface and free surface. Base on this, Proposed the optimum requirements of optical design temperature adaptability, and reasonable choice of surface form according to space camera application, environmental requirements, which is an important supplement to the space camera optimizing design and assist in space camera design resources rational allocation.c) The transmission error from thermal analysis temperature field to structure analysis model is one of the important of factors effect STOP analysis accuracy. This thesis based on the particularity of space camera, proposed a limited rang mapping method under the premise of a thermal model and the structure model to maintain similar morphology characteristic, which improves the accuracy of mapping temperature field data, and solves the problem of the transfer of the temperature field to the structure analysis model which is easy to produce deviation.d) STOP integrated analysis technology is applied to the processing and testing of the space camera mirror assembly, detected tooling design, grounding test, and so on. The feasibility verification of the design of the detected tooling and test environment with space cameras’ optical performance, which is an improved application in the development of the space camera.e) The initial realization of the satellite load layout optimization based on the space camera optical performance, and made a breakthrough in the application of satellite attitude control with STOP technology, which is also primaryexploration for satellite carrier integration design.In the process of solving the key problems of STOP technology, the following results have been formed:1) An optical, structural, thermal control model registration method based on absolute coordinate system is proposed, which can effectively improve the data transfer efficiency and reduce the error of data transfer.2) Formed a set of integrated analysis process that covers the camera design, process validation, and testing.3) Completed the STOP technology methodology research and glue ground approaches to process validation test design, and lay a foundation for the improvement of the accuracy of STOP integrated analysis.Through the research of this thesis, the STOP integrated analysis technology applied in the design of space camera is improved to system and process level. At the same time, the research is expected to be extended to the satellite carrier integration layout and design, which has important theoretical significance and application value for the developmentof the project.