Design Of Virtual Prototype For Guidance Navigation & Control Of Reusable Launch Vehicles

With development of aerospace technology and increment of human activities in outer space, a kind of space vehicle witch is cheapness, credibility , flexibility and convenience have been impendency in requirement. New generation aerospace vehicle must be reusable not only partly like shuttle witch orbiter is reusable but also as entirely as possible. A lot of countries are establishing the plans of research or developing new generation aerospace transport system. RLV as a kind of new generation aerospace vehicle is attracting much attention.Considering the characteristic of RLV of series two stage to orbit, the thesis gives a brief present on elementary design of guidance, navigation and control system of RLV. Accordingly existing experiences of shuttle, the thesis gives out primary collectively models of guidance navigation and control system. For validating the realization of models at the beginning of design, the simulation models of guidance navigation and control system are built on VPM platform based on the virtual prototype technology. In addition, virtual prototype model of in-orbit motion is set up on VPM platform. The contents mainly include:1) Virtual prototype design of RLV, including orbit dynamics, kinematics and attitude dynamics , kinematics; orbit perturbations and attitude disturbances including J2 perturbation, atmospheric drag perturbation, solar-radiation pressure perturbation and third-body perturbation and gravity gradient disturbance and so on. The correlative contents of orbit calculation include subsatellite calculation and so on.2) Guidance navigation and control system design of RLV, including collectively framework models of system; Simulation models design of navigation system facility; Simulation models design of all stages guidance system; Simulation models design of control system models and actors including orbit motion system(OMS) and reaction control system(RCS).The models of guidance navigation and control system for RLV are complicated. So are in-orbit motion models. Extensibility is fully considered while models are built. Making use of the mechanism of the VPM platform, framework models of system are firstly constructed, and then correlative interface are left for realization of algorithms, Further development of model is easier based on it.