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LabVIEW1 has long been used as a graphical programming language for test, measurement, and control. LabVIEW's graphical data flow paradigm and tight coupling with hardware make it well suited for data acquisition applications. While robot applications rely on good, reliable hardware interfaces, they also frequently require scalability to multiple heterogeneous targets and complex architectures. This...
This paper presents an approach to optimize fuel costs of a hybrid electric ship propulsion system under different mission considerations. The static optimization problem is to commit and dispatch the generation sources such that fuel cost is minimized, while meeting load demands and complying with dynamic Quality of Service (QOS) constraints. A simulation platform capable of representing a continuous...
An agile control system is a set of distributed controllers designed for the management of complex, interconnected systems that are able to change their structure in response to faults and damage events. Structural changes include dynamic reconfiguration of communication, agent scoping, and control algorithms.We propose that information theory will be a valuable tool in the design and analysis of...
In recent years, wireless sensor networks have been applied to many applications. These sensors are usually simple, low-cost devices, deployed in large quantities, and prone to failure. This paper presents a model-free and reference-free spike fault identification method based on pair-wise verification. When the input of a system comes from a common source, there is a linear relationship between the...
Large-scale systems refer to systems that consist of many interconnected local systems. Conventional centralized control schemes are not suitable for such large-scale systems because of their complex local and global dynamic behavior as well as computational difficulties. This paper introduces the general framework of an agent-based federated control motivated by the political structure where partially...
The predominance of recent self-healing power system research has been directed towards centralized command and control functions. In this paper, a decentralized multi-agent control method for distributed microgrids is introduced. Given the complexity of a large power system spanning hundreds of miles and comprised of numerous microgrids, it is potentially unrealistic to expect that centralizing total...
This paper investigates different converter topologies, and their control, that can be used as an interface between fuel cells and the DC bus in a power system. As an example, the integration of fuel cells energy to the DC bus in a DC zonal electric distribution system (DC ZEDS) will be focused on. The DC ZEDS example is reasonable as high-quality power supply is interesting the most for the US navy...
Resilient control systems in critical infrastructures require increased cyber-security and state-awareness. One of the necessary conditions for achieving the desired high level of resiliency is timely reporting and understanding of the status and behavioral trends of the control system. This paper describes the design and development of a fuzzy-neural data fusion system for increased state-awareness...
As societies shift to “greener” means of transportation using electricity-driven vehicles one critical challenge we face is the creation of a robust and resilient infrastructure of recharging stations. A particular issue here is the optimal location of service stations. In this work, we consider the placement of battery replacing service station in a city network for which the normal traffic flow...
This paper is devoted to the design and performance analysis of an autonomous decentralized monitoring system that degrades gracefully under natural or malicious sensor malfunctioning. In the scenario considered, the sensors are characterized by a quantity referred to as data quality, and a method for estimating process variables, based on sensor measurements and data quality, is developed. Using...
Design of robust control systems requires efficient ways to compute variations of responses of interest with respect to a wide range of variations for a large number of initial conditions. This is necessary in order to perform engineering oriented applications such as design optimization, inverse studies, and sensitivity analysis. A reduced order model based on an adjoint approach that takes advantage...
The resiliency of a ship is dependent upon the resiliency of the various engineering plants that operate the ship. Especially for combatant ships, engineering plants must be reconfigurable when damage occurs to ensure the ship has fight-through capabilities. Furthermore, reduced manning on ships necessitates the automated operation of engineering plants, especially their reconfiguration during times...
This paper describes the potential for use of a reference architecture for industrial control system (ICS) security as a method for moving toward improved protection through better decision-making
Security of control systems is becoming a pivotal concern in critical national infrastructures such as the power grid and nuclear plants. In this paper, we adopt a hierarchical viewpoint to these security issues, addressing security concerns at each level and emphasizing a holistic cross-layer philosophy for developing security solutions. We propose a bottom-up framework that establishes a model from...
In this paper we propose a new ecologically inspired control methodology for cooperative control of multi-robot systems. In this method we identify each individual robot as a subsystem of a large system and build the interactions between these subsystems to satisfy the design requirements. Interactions between these subsystems are built such that they mimic the interspecific (between species) interactions...
This paper uses multi-agent concepts for the development of a decentralized control law for networked large scale systems in the presence of environmental noise and communication channel noise. The subsystems are assumed to be linear time invariant with Gaussian white noise appearing as an exogenous input. Each subsystem receives output information of other subsystems through the communication channel,...
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