基于模型的固体火箭助推器IVHM系统
Model based IVHM system for the solid rocket booster
摘要：
我们报告的进展，基于模型的混合概率方法的发展，以板上IVHM固体火箭助推器（SRB），可以容纳在各种非线性动态非标称制度的模型参数的突变。这项工作与猎户座飞行任务计划有关。具体而言，一个案件违反故障的SRB被认为是考虑到燃烧的一个洞，通过火箭的情况下，以及烧蚀的喷管喉道的作用下的热气流。在FLUENT中建立了断层的圆柱对称高保真模型（HFM）。FLUENT模拟的结果被证明是在良好的协议与准稳态近似和解析解的一维偏微分方程（PDE）系统的燃烧室中的气体流动和孔通过火箭外壳。
英文摘要：
We report progress in the development of a model-based hybrid probabilistic approach to an on-board IVHM for solid rocket boosters (SRBs) that can accommodate the abrupt changes of the model parameters in various nonlinear dynamical off-nominal regimes. The work is related to the ORION mission program. Specifically, a case breach fault for SRBs is considered that takes into account burning a hole through the rocket case, as well as ablation of the nozzle throat under the action of hot gas flow. A high-fidelity model (HFM) of the fault is developed in FLUENT in cylindrical symmetry. The results of the FLUENT simulations are shown to be in good agreement with quasi-stationary approximation and analytical solution of a system of one-dimensional partial differential equations (PDEs) for the gas flow in the combustion chamber and in the hole through the rocket case.
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