Quantification of Margins and Uncertainties for Integrated Spacecraft Systems Models

Autor:	Serhat Hosder, Thomas K. West, Tyler Winter
Rok vydání:	2015
Předmět:	Physics Polynomial chaos Spacecraft business.industry Complex system Aerospace Engineering Nonlinear system Space and Planetary Science Control theory Collocation method business Representation (mathematics) Uncertainty analysis Analytic function
Zdroj:	Journal of Spacecraft and Rockets. 52:450-461
ISSN:	1533-6794 0022-4650
Popis:	The objective of this study was to introduce an efficient and accurate approach to the quantification of margins and uncertainties for integrated spacecraft systems models. In this study, stochastic expansions, based on nonintrusive polynomial chaos, were used for efficient representation of uncertainty both in design metrics and associated performance limits of a system. Additionally, procedures were outlined for analyzing systems that contain different uncertainty types between the performance metrics and performance limits. These methodologies were demonstrated on two model problems, each possessing mixed (epistemic and aleatory) uncertainty, which was propagated through the models using second-order probability. The first was a complex system model of highly nonlinear analytical functions. The second was a coupled multisystem, physics-based model for spacecraft reentry. The performance metrics consisted of two systems used to determine the maximum g load, the necessary bank angle correction, and maxim...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c33118e3839ca38f672b4fdfda63cb92 https://doi.org/10.2514/1.a33067 Zobrazit plný text záznamu