Engineered Resilient Systems: A DoD Perspective

Goerger, Simon R.; Madni, Azad M.; Eslinger, Owen

doi:10.1016/j.procs.2014.03.103

Cited by 72 publications

(34 citation statements)

References 7 publications

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“…Older papers, referred to in the MITRE study [14], seem to discuss it in general terms, at the conceptual level, without even using the term model. There has been also a variety of papers published over the years, how to approach studying resilience (resiliency) and building models from the point of view called resilience engineering, for example [5], [17], [21]. All these models, however, are primarily conceptual and do not facilitate quantitative, or even qualitative, analysis of resiliency.…”

Section: A General Considerationsmentioning

confidence: 99%

“…[2]. The concept has been also extended to human-made environments, such as supply chains [3], transportation networks [4], military operations [5], etc., which are called resilient if they can tolerate some major failures or disruptions and smoothly return to normal operational capability. Recent books in systems engineering take note of additional aspects of resiliency, including redundancy [6], adaptability [7], and safety as the ability to succeed under varying conditions [8].…”

Section: Introductionmentioning

confidence: 99%

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Modeling Resiliency and Its Essential Components for Cyberphysical Systems

Zalewski¹,

Drager²,

McKeever³

et al. 2015

Annals of Computer Science and Information Systems

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Abstract-This paper presents an initial approach related to modeling resiliency for cyberphysical systems. It discusses the concept and definitions of resiliency and outlines the process of building a model of resiliency. Through analogies with feedback control and fault tolerance, the Design for Resilience is addressed, where the design of the controller component of a cyberphysical system needs to account for potential safety hazards and security threats, with awareness of its internal faults and vulnerabilities. This model is validated against other approaches to modeling resilience described in the literature, followed by a discussion of the resilience metrics. The paper concludes with presenting the strategy of modeling resiliency, based on the assumption that one cannot guarantee absolute protection against attacks, or failures, but can aim at providing successful recovery after disruptions. With safety and security as essential resiliency components, an extended model is proposed involving an attacker, suggesting appropriate performance metric reflecting the distance between the normal state and the degraded state. A model-based environment Möbius, from the University of Illinois, is considered in helping to evaluate resiliency under various operational scenarios.

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Section: A General Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling Resiliency and Its Essential Components for Cyberphysical Systems

Zalewski¹,

Drager²,

McKeever³

et al. 2015

Annals of Computer Science and Information Systems

View full text Add to dashboard Cite

show abstract

“…From a DoD perspective, resiliency describes a system's ability to “anticipate, resist, absorb, respond to, adapt to, and recover from a disturbance from either natural or man‐made events” (Ref. : 866). This perspective includes two main portions, first the ability to react to a disturbance and then the ability to return to the previous level of functionality after the disturbance.…”

Section: Introductionmentioning

confidence: 99%

“…This perspective includes two main portions, first the ability to react to a disturbance and then the ability to return to the previous level of functionality after the disturbance. Engineered resilient systems (ERS) are specifically designed systems to account for the changing environment systems must operate within order to provide value to stakeholders after disruption to system operations . Some other work in the DoD focused on incorporating the attributes of resiliency into the early design of systems during the analysis of alternatives phase of requirements generation.…”

Section: Introductionmentioning

confidence: 99%

Achieving resiliency in major defense programs through nonfunctional attributes

Enos

2019

Systems Engineering

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This article examines how the ilities, or nonfunctional attributes, help to understand the concept of resiliency in engineered systems. For engineered systems, resiliency describes the ability of a system to react to and return to full function after an interruption to system operation. The literature on resiliency of engineered systems defines resiliency in both the context of mission and platform resiliency; however, it leaves an opportunity to research how to understand, manage, and achieve resiliency. This work proposes an application of the systems engineering ilities to resiliency to understand how systems engineers can account for resiliency in the design process and incorporate resiliency into systems. Quality, robustness, and agility assist in understanding the components of resiliency and the ilities of repairability, extensibility, flexibility, adaptability, and versatility provide means for systems to achieve resiliency. This article applies this framework to examine two cases of DoD systems, the B‐52 bomber and the F‐117 stealth fighter. These two examples demonstrate how nonfunctional attributes enable engineered systems to achieve resiliency and help to better understand the concept of resiliency in engineered systems.

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“…These systems have the ability to resist and adapt from disturbances. They also are highly adaptive, having the capability to merge information, make decisions, interact with multiple agents and have a memory to facilitate learning (Goerger et al, 2014;Chandra, 2010). The main objective is to present a system based on flight rules capable to choose actions with incomplete information.…”

Section: Introductionmentioning

confidence: 99%

Autonomous Aerial Vehicle - Based on Non-Monotonic Logic

Medina

Siegel

Doncescu³

2017

Proceedings of the 3rd International Conference on Vehicle Technology and Intelligent Transport Systems

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Abstract:In this article we study the case of an autonomous motor-glider. The aims of the aircraft is to maintain its flight as long as possible, taking advantage of the rising air from the ground, known as thermals, despite of limited energy resources and possible external influences, such as turbulences. The pilot task being to make decisions with incomplete, uncertain or even contradictory information, as well as driving to the desired path or destination. We propose the formulation of a model from the point of view of logical theory, using nonmonotonic logic and more specifically default logic, to tackle these problems. Finally, we present the results of a simulation for further application in a glider(reduced model) which use solar cells for power management in embedded system. INTRODUCTIONThe glider is one of the most relevant aircraft, in terms of the ratio of the distance traveled and the loss of altitude. Making it more efficient to fly than other aircrafts. In this paper, we focus on an autonomous glider(reduced model), a convenient choice(cost) in terms of weight and aerodynamics. The principle of a glider is that it uses the "vertical" wind (thermal and dynamic energy). It is to "climb", which that means to increase in altitude and reach an updraft, while "descent", expresses the rate of descent in a downward burst. "Zero" descent means that updrafts are strong enough to maintain flight, but not enough to allow climbing. As in the nature, there are various species of birds using the same principle. For example: albatross and condor. To perform those flight maneuvers, a pilot must take decisions concerning the flight situation from the cockpit. He has access to different instruments showing altitude, wind speed, inclination of the aircraft, etc. Another constraint is that he also needs to find thermals, respecting the aeronautical and security regulations. Taking these considerations into account, the pilot must follow his desired flight path applying control commands. Increasing or decreasing altitude, turning to the right or left, etc. These rules are applicable to many types of aircraft. We introduce a discrete model of flight rules. This method is based on non-monotonic logic. There are different research proposals in non-monotonic logic reasoning: default reasoning, autoepistemic reasoning, reasoning in the presence of contradictory information and negative reasoning (El-Azhary et al., 2002). On another side, we can consider our model as a resilient system. These systems have the ability to resist and adapt from disturbances. They also are highly adaptive, having the capability to merge information, make decisions, interact with multiple agents and have a memory to facilitate learning (Goerger et al., 2014;Chandra, 2010). The main objective is to present a system based on flight rules capable to choose actions with incomplete information. The case study is presented in section 2. In section 3 classical logic representation is described. Section 4 is dedicated to the theoretical definition of defa...

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Engineered Resilient Systems: A DoD Perspective

Cited by 72 publications

References 7 publications

Modeling Resiliency and Its Essential Components for Cyberphysical Systems

Modeling Resiliency and Its Essential Components for Cyberphysical Systems

Achieving resiliency in major defense programs through nonfunctional attributes

Autonomous Aerial Vehicle - Based on Non-Monotonic Logic

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