Virtual Prototype Technology And Its Application In Space Remote Sensor Development

Virtual prototype (VP) is an aggregate of models from multiple disciplines and can simulate all main characteristics of the product. The emergence of VP provides a new way for space remote sensor (SRS) development. The VP-based development pattern gains advantages over physical prototype based development pattern in reducing cost, time and risks. VP is a complicated model system. Both the theory and the application of VP have many problem to be researched. The key technologies of VP and the methods of utilizing VP in SRS development were investigated deeply.Considering the heterogeneity of VP models, a hierarchical VP modeling method and a model integration method based on hierarchical modeling were put forward. The VP model architecture was given and the VP meta-model was designed.A flow-based simulation driving method of VP was developed. The components of simulation flow were analyzed and the execution rules were designed. Then the software was developed. Flow-based simulation driving method provided a good solution for collaborative simulation in distributed network environment.A VP distributed integrated development environment (VPDIDE) was developed. Three key technologies of VPDIDE were investegated deeply including VP model management, access control and workflow management. VPDIDE could expedite the design process, reduce costs and do benifit to the information utilization.A method of SRS performance analysis based on VP was proposed from the point of view of system engineering. Taking optical SRS as experiment object, the VP-based performance analysis process of SRS was given. Then the SRS VP was created and the performance of SRS under sun radiation was analyzed. The optical performance with mirror deformation was then compared with the performance under ideal conditions. The result showed that the optical performance was not sensitive to radial temperature gradient.At last, a SRS multidisciplinary design optimization (MDO) method based on VP was given and SRS main mirror lightweight design was carried out with this method. Taking into account the computational complexity and heterogeneity of VP, multidisciplinary feasible algorithm was selected. Then the multi-index comprehensive evaluation method of VP was given. The computational complexity was reduced by using uniform design and second order polynomial response surface. And the accuracy of solution was achieved by adding test point and using neural network response surface.This dissertation has established a foundation for the research of VP modeling and simulation and for the application of utilizing VP in SRS development.