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Resilience Analysis of Inertial Navigation Systems (INS) through an Enhanced INS Tool Kit Open Access

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Resilience is explained as an entity’s capacity to survive and recover from disruptions. Approaches to design resilient systems are in growing demand; however, there have been few demonstrations for measuring and quantifying systems resilience. This research presents a Resilience Analysis regarding Inertial Navigation System (INS) architectures. Specifically for the case study at hand, it is not clear which INS architecture to choose (tightly coupled or loosely coupled) for resilience. This research tests whether Robustness and Recovery measures of effectiveness (MOEs) can be used to determine which INS architecture is most resilient.The methodology of this research included enhancing an INS Tool Kit with Resilience Analysis functions. The INS Tool Kit was used to collect resilience data for different INS configurations dealing with Global Positioning System (GPS) outages. Robustness and Recovery data were collected for 500 observations of five different INS configurations. Three configurations were loosely coupled and two were tightly coupled; therefore, 1500 observations of resilience data for loosely coupled INS were compared to 1000 observations for tightly coupled INS. Using data from this Resilience Analysis, a series of nonparametric Mann-Whitney tests showed there is a statistically significant difference between tightly coupled and loosely coupled INS architectures in terms of resilience. Based on these results, greater resilience to GPS outages can be added to the list of advantages for tightly coupled INS architectures. The conclusion of this research is that Robustness and Recovery measures can be used to determine and compare the resilience of different INS architectures.

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