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Assessment of Artemis-1 Pogo Development Flight Instrumentation System

机译:Artemis-1 Pogo开发飞行仪表系统评估

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As the space industry continues to strive for more efficient launch vehicles, it must rely on increasingly accurate predictive models. Verification of models typically requires physical testing. Flight data measurements offer the most real and therefore the most accurate data for model correlation. As NASA prepares for the inaugural launch of Space Launch System (SLS), Artemis-1, they must rely heavily on predictive system models to ensure flight safety. NASA has implemented a Development Flight Instrumentation (DFI) system in hopes of recovering useful flight data to aid in model correlation. Historically, some of the most important flight measurements are those that monitor the potentially destructive dynamic interaction of the structural and propellant modes - a phenomenon known as pogo. Pogo is a dynamic instability that can occur on a launch vehicle during any phase of ascent. During this investigation an end-to-end assessment of the Artemis-I Pogo-related DFI was performed to identify any obstacles inherent in the current instrumentation system which may prevent successful measurement of the data necessary to validate the current predictive models of the Main Propulsion System (MPS). Input drive signals were approximated and applied to a system-level SLS state-space model to derive predicted pressure and acceleration responses. These predicted responses were then fed through a simulation of the data acquisition process in order to recover predicted measurements. Finally, a mock Flight Data Analysis (FDA) was performed to assess the ability of these measurements to meet the Flight Test Objectives (FTO).
机译:随着空间行业继续争取更高效的发动车辆,它必须依靠越来越准确的预测模型。模型的验证通常需要物理测试。飞行数据测量提供最真实的,因此是模型相关的最准确的数据。随着美国宇航局为空间发射系统(SLS)的就职推出,Artemis-1准备,他们必须严重依赖预测系统模型,以确保飞行安全。美国宇航局实施了开发飞行仪表(DFI)系统,希望恢复有用的飞行数据来帮助模型相关性。从历史上看,一些最重要的飞行测量是那些监测结构和推进式模式的潜在破坏性动态相互作用的飞行测量 - 一种称为Pogo的现象。 Pogo是一种动态不稳定,可以在上升的任何阶段发生在发射车辆上。在该研究期间,进行了Artemis-i Pogo相关的DFI的端到端评估,以确定目前仪器系统固有的任何障碍,这可能防止成功测量验证主要推进的当前预测模型所需的数据系统(MPS)。输入驱动信号近似并将其应用于系统级SLS状态空间模型,以导出预测的压力和加速度响应。然后通过数据采集过程的模拟来馈送这些预测的响应,以便恢复预测的测量。最后,进行模拟飞行数据分析(FDA)以评估这些测量以满足飞行测试目标(FTO)的能力。

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