Latest in cs.sy

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Software-Defined Microgrid Control for Resilience Against Cyber AttacksFeb 08 2018Microgrids (MGs) rely on networked control supported by off-the-shelf wireless communications. This makes them vulnerable to cyber-attacks, such as denial-of-service (DoS). In this paper, we mitigate those attacks by applying the concepts of (i) separation ... More
A Diversity-based Substation Cyber Defense Strategy utilizing Coloring GamesFeb 07 2018Growing cybersecurity risks in the power grid require that utilities implement a variety of security mechanism (SM) composed mostly of VPNs, firewalls, or other custom security components. While they provide some protection, they might contain software ... More
Power-Controlled Hamiltonian Systems: Application to Electrical Systems with Constant Power LoadsFeb 07 2018We study a type of port-Hamiltonian system, in which the controller or disturbance is not applied to the flow variables, but to the systems power, a scenario that appears in many practical applications. A suitable framework is provided to model these ... More
Cyber-Physical Architecture Assisted by Programmable NetworkingFeb 07 2018Cyber-physical technologies are prone to attacks, in addition to faults and failures. The issue of protecting cyber-physical systems should be tackled by jointly addressing security at both cyber and physical domains, in order to promptly detect and mitigate ... More
Deciding Detectability for Labeled Petri NetsFeb 06 2018Detectability of discrete event systems (DESs) is a property to determine a priori whether the current and subsequent states can be determined based on observations. In this paper, we investigate the verification of two detectability properties -- strong ... More
Development of c-means Clustering Based Adaptive Fuzzy Controller for A Flapping Wing Micro Air VehicleFeb 05 2018Advanced and accurate modelling of a Flapping Wing Micro Air Vehicle (FW MAV) and its control is one of the recent research topics related to the field of autonomous Unmanned Aerial Vehicles (UAVs). In this work, a four wing Natureinspired (NI) FW MAV ... More
Lyapunov Design for Event-Triggered Exponential StabilizationFeb 03 2018Control Lyapunov Functions (CLF) method gives a constructive tool for stabilization of nonlinear systems. To find a CLF, many methods have been proposed in the literature, e.g. backstepping for cascaded systems and sum of squares (SOS) programming for ... More
Realizing Uncertainty-Aware Timing Stack in Embedded Operating SystemFeb 03 2018Time awareness is critical to a broad range of emerging applications -- in Cyber-Physical Systems and Internet of Things -- running on commodity platforms and operating systems. Traditionally, time is synchronized across devices through a best-effort ... More
Leader Tracking of Euler-Lagrange Agents on Directed Switching Networks Using A Model-Independent AlgorithmFeb 03 2018In this paper, we propose a discontinuous distributed model-independent algorithm for a directed network of Euler-Lagrange agents to track the trajectory of a leader with non-constant velocity. We initially study a fixed network and show that the leader ... More
Full- & Reduced-Order State-Space Modeling of Wind Turbine Systems with Permanent-Magnet Synchronous GeneratorFeb 02 2018Wind energy is an integral part of nowadays energy supply and one of the fastest growing sources of electricity in the world today. Accurate models for wind energy conversion systems (WECSs) are of key interest for the analysis and control design of present ... More
Incremental control and guidance of hybrid aircraft applied to the Cyclone tailsitter UAVFeb 02 2018Hybrid unmanned aircraft, that combine hover capability with a wing for fast and efficient forward flight, have attracted a lot of attention in recent years. Many different designs are proposed, but one of the most promising is the tailsitter concept. ... More
Generic Evolving Self-Organizing Neuro-Fuzzy Control of Bio-inspired Unmanned Aerial VehiclesFeb 02 2018At recent times, with the incremental demand of the fully autonomous system, a huge research interest is observed in learning machine based intelligent, self-organizing, and evolving controller. In this work, a new evolving and self-organizing controller ... More
Dominance analysis of linear complementarity systemsFeb 01 2018The paper extends the concepts of dominance and p-dissipativity to the non-smooth family of linear complementarity systems. Dominance generalizes incremental stability whereas p-dissipativity generalizes incremental passivity. The generalization aims ... More
Modeling and control of permanent-magnet synchronous generators under open-switch converter faultsFeb 01 2018The mathematical modeling of open-switch faults in two-level machine-side converters and the fault-tolerant current control of isotropic permanent-magnet synchronous generators are discussed. The proposed converter model is generic for any open-switch ... More
Optimal Configurations in Coverage Control with Polynomial CostsJan 31 2018We revisit the static coverage control problem for placement of vehicles with simple motion on the real line, under the assumption that the cost is a polynomial function of the locations of the vehicles. The main contribution of this paper is to demonstrate ... More
On the Use of the Observability Gramian for Partially Observed Robotic Path Planning ProblemsJan 30 2018Optimizing measures of the observability Gramian as a surrogate for the estimation performance may provide irrelevant or misleading trajectories for planning under observation uncertainty.
Optimizing Reweighted Belief Propagation for Distributed Likelihood Fusion ProblemsJan 28 2018Feb 07 2018Belief propagation (BP) is a powerful tool to solve distributed inference problems, though it is limited by short cycles in the corresponding factor graph. Such cycles may lead to incorrect solutions or oscillatory behavior. Only for certain types of ... More
Trajectory Generation using Sharpness Continuous Dubins-like Paths with Applications in Control of Heavy Duty VehiclesJan 26 2018We present a trajectory generation framework for control of wheeled vehicles under steering actuator constraints. The motivation is smooth autonomous driving of heavy vehicles. The key idea is to take into account rate, and additionally, torque limitations ... More
Event-triggered stabilization of disturbed linear systems over digital channelsJan 26 2018We present an event-triggered control strategy for stabilizing a scalar, continuous-time, time-invariant, linear system over a digital communication channel having bounded delay, and in the presence of bounded system disturbance. We propose an encoding-decoding ... More
FLORIS and CLORIS: Hybrid Source and Network Localization Based on Ranges and VideoJan 24 2018We propose hybrid methods for localization in wireless sensor networks fusing noisy range measurements with angular information (extracted from video). Compared with conventional methods that rely on a single sensed variable, this may pave the way for ... More
The Optimal Majority Threshold as a Function of the Variation Coefficient of the EnvironmentJan 21 2018Within the model of social dynamics determined by collective decisions in a stochastic environment (ViSE model), we consider the case of a homogeneous society consisting of classically rational economic agents (or homines economici, or egoists). We present ... More
A Tutorial on Modeling and Analysis of Dynamic Social Networks. Part IIJan 20 2018Recent years have witnessed a significant trend towards filling the gap between Social Network Analysis (SNA) and control theory. This trend was enabled by the introduction of new mathematical models describing dynamics of social groups, the development ... More
Packet Routing in 3D Nanonetworks: A Lightweight, Linear-path SchemeJan 17 2018Packet routing in nanonetworks requires novel approaches, which can cope with the extreme limitations posed by the nano-scale. Highly lossy wireless channels, extremely limited hardware capabilities and non-unique node identifiers are among the restrictions. ... More
Localizability-Constrained Deployment of Mobile Robotic Networks with Noisy Range MeasurementsJan 15 2018When nodes in a mobile network use relative noisy measurements with respect to their neighbors to estimate their positions, the overall connectivity and geometry of the measurement network has a critical influence on the achievable localization accuracy. ... More
Sex differences in network controllability as a predictor of executive function in youthJan 15 2018Executive function emerges late in development and displays different developmental trends in males and females. Sex differences in executive function in youth have been linked to vulnerability to psychopathology as well as to behaviors that impinge on ... More
Computation of the State Bias and Initial States for Stochastic State Space Systems in the General 2-D Roesser Model FormJan 14 2018Recently \cite{Ramos2017a} presented a subspace system identification algorithm for 2-D purely stochastic state space models in the general Roesser form. However, since the exact problem requires an oblique projection of $Y_f^h$ projected onto $W_p^h$ ... More
Impact Assessment of Hypothesized Cyberattacks on Interconnected Bulk Power SystemsJan 03 2018The first-ever Ukraine cyberattack on power grid has proven its devastation by hacking into their critical cyber assets. With administrative privileges accessing substation networks/local control centers, one intelligent way of coordinated cyberattacks ... More
Directional Statistics and Filtering Using libDirectionalDec 28 2017In this paper, we present libDirectional, a MATLAB library for directional statistics and directional estimation. It supports a variety of commonly used distributions on the unit circle, such as the von Mises, wrapped normal, and wrapped Cauchy distributions. ... More
Explicit Reference Governor for the Constrained Control of Time-Delayed Linear SystemsDec 21 2017This paper introduces an explicit reference governor approach for controlling time delay linear systems subject to state and input constraints. The proposed framework relies on suitable invariant sets that can be built using both Lyapunov-Razumikhin and ... More
State Estimation For An Agonistic-Antagonistic Muscle SystemDec 02 2017Research on assistive technology, rehabilitation, and prosthesis requires the understanding of human machine interaction, in which human muscular properties play a pivotal role. This paper studies a nonlinear agonistic-antagonistic muscle system based ... More
A Design-Time/Run-Time Application Mapping Methodology for Predictable Execution Time in MPSoCsNov 16 2017Executing multiple applications on a single MPSoC brings the major challenge of satisfying multiple quality requirements regarding real-time, energy, etc. Hybrid application mapping denotes the combination of design-time analysis with run-time application ... More
A Lie bracket approximation approach to distributed optimization over directed graphsNov 15 2017We consider a group of computation units trying to cooperatively solve a distributed optimization problem with shared linear equality and inequality constraints. Assuming that the computation units are communicating over a network whose topology is described ... More
Traffic Models of Periodic Event-Triggered Control SystemsNov 09 2017Periodic event-triggered control (PETC) is a version of event-triggered control (ETC) that only requires to measure the plant output periodically instead of continuously. In this work, we present a construction of timing models for these PETC implementations ... More
Permissive Finite-State Controllers of POMDPs using Parameter SynthesisOct 24 2017We study finite-state controllers (FSCs) for partially observable Markov decision processes (POMDPs). The key insight is that computing (randomized) FSCs on POMDPs is equivalent to synthesis for parametric Markov chains (pMCs). This correspondence enables ... More
Robustly Maximal Utilisation of Energy-Constrained Distributed ResourcesOct 17 2017We consider the problem of dispatching a fleet of distributed energy reserve devices to collectively meet a sequence of power requests over time. Under the restriction that reserves cannot be replenished, we aim to maximise the survival time of an energy-constrained ... More
An Integrated Research Infrastructure for Validating Cyber-Physical Energy SystemsOct 06 2017Renewables are key enablers in the plight to reduce greenhouse gas emissions and cope with anthropogenic global warming. The intermittent nature and limited storage capabilities of renewables culminate in new challenges that power system operators have ... More
Implementing Flexible Demand: Real-time Price vs. Market IntegrationSep 08 2017This paper proposes an agent-based model that combines both spot and balancing electricity markets. From this model, we develop a multi-agent simulation to study the integration of the consumers' flexibility into the system. Our study identifies the conditions ... More
Cooperative Curve Tracking in Two Dimensions Without Explicit Estimation of the Field GradientSep 07 2017We design a control law for two agents to successfully track a level curve in the plane without explicitly estimating the field gradient. The velocity of each agent is decomposed along two mutually perpendicular directions, and separate control laws are ... More
Parametric identification of parallel Wiener-Hammerstein systemsAug 22 2017Block-oriented nonlinear models are popular in nonlinear modeling because of their advantages to be quite simple to understand and easy to use. To increase the flexibility of single branch block-oriented models, such as Hammerstein, Wiener, and Wiener-Hammerstein ... More
Multi-layer Analysis of IoT-based SystemsAug 22 2017This document provides a theoretical-methodological ground to sustain the idea that the IoT builds the structure of awareness of large-scale infrastructures viewed as techno-social cyber-physical systems, which are special cases of self-developing reflexive-active ... More
Anomaly Detection Using Optimally-Placed Micro-PMU Sensors in Distribution GridsAug 01 2017As the distribution grid moves toward a tightly-monitored network, it is important to automate the analysis of the enormous amount of data produced by the sensors to increase the operators situational awareness about the system. In this paper, focusing ... More
Utility Maximizing Sequential Sensing Over a Finite HorizonMay 17 2017We consider the problem of optimally utilizing $N$ resources, each in an unknown binary state. The state of each resource can be inferred from state-dependent noisy measurements. Depending on its state, utilizing a resource results in either a reward ... More
Quasi-Steady Model of a Pumping Kite Power SystemMay 10 2017The traction force of a kite can be used to drive a cyclic motion for extracting wind energy from the atmosphere. This paper presents a novel quasi-steady modelling framework for predicting the power generated over a full pumping cycle. The cycle is divided ... More
Dissipation of stop-and-go waves via control of autonomous vehicles: Field experimentsMay 04 2017Traffic waves are phenomena that emerge when the vehicular density exceeds a critical threshold. Considering the presence of increasingly automated vehicles in the traffic stream, a number of research activities have focused on the influence of automated ... More
Control Synthesis of Nonlinear Sampled Switched Systems using Euler's MethodApr 11 2017In this paper, we propose a symbolic control synthesis method for nonlinear sampled switched systems whose vector fields are one-sided Lipschitz. The main idea is to use an approximate model obtained from the forward Euler method to build a guaranteed ... More
Making the Grid Truly Smart: Autonomous System Identification in "Modemless" DC MicroGridsMar 30 2017We introduce novel framework for autonomous learning of the own configuration in direct current (DC) MicroGrids (MG) with high penetration of power electronic converters and without access to an external communication system. The framework is implemented ... More
Decentralized Periodic Event-Triggered Control with Quantization and Asynchronous CommunicationMar 29 2017Nov 10 2017Asynchronous decentralized event-triggered control (ADETC) is an implementation of controllers characterized by decentralized event generation, asynchronous sampling updates, and dynamic quantization. Combining those elements in ADETC results in a parsimonious ... More
Towards a Functional System Architecture for Automated VehiclesMar 24 2017Mar 30 2017This paper presents a functional system architecture for an automated vehicle. It provides an overall, generic structure that is independent of a specific implementation of a particular vehicle project. Yet, it has been inspired and cross-checked with ... More
Final-State Constrained Optimal Control via a Projection Operator ApproachMar 24 2017In this paper we develop a numerical method to solve nonlinear optimal control problems with final-state constraints. Specifically, we extend the PRojection Operator based Netwon's method for Trajectory Optimization (PRONTO), which was proposed by Hauser ... More
Simple synchronization protocols for heterogeneous networks: beyond passivity (extended version)Mar 08 2017Synchronization among autonomous agents via local interactions is one of the benchmark problems in multi-agent control. Whereas synchronization algorithms for identical agents have been thoroughly studied, synchronization of heterogeneous networks still ... More
Why Smart Appliances May Result in a Stupid Energy Grid?Mar 02 2017This article discusses unexpected consequences of idealistic conceptions about the modernization of power grids. We will focus our analysis on demand-response policies based on automatic decisions by the so-called smart home appliances. Following the ... More
Stochastic Variance Reduction Methods for Policy EvaluationFeb 25 2017Jun 09 2017Policy evaluation is a crucial step in many reinforcement-learning procedures, which estimates a value function that predicts states' long-term value under a given policy. In this paper, we focus on policy evaluation with linear function approximation ... More
Attacking the V: On the Resiliency of Adaptive-Horizon MPCFeb 01 2017We introduce the concept of a V-formation game between a controller and an attacker, where controller's goal is to maneuver the plant (a simple model of flocking dynamics) into a V-formation, and the goal of the attacker is to prevent the controller from ... More
Nearest-Neighbor Based Non-Parametric Probabilistic Forecasting with Applications in Photovoltaic SystemsJan 23 2017The present contribution offers a simple methodology for the obtainment of data-driven interval forecasting models by combining pairs of quantile regressions. Those regressions are created without the usage of the non-differentiable pinball-loss function, ... More
ARES: Adaptive Receding-Horizon Synthesis of Optimal PlansDec 21 2016We introduce ARES, an efficient approximation algorithm for generating optimal plans (action sequences) that take an initial state of a Markov Decision Process (MDP) to a state whose cost is below a specified (convergence) threshold. ARES uses Particle ... More
Safety Verification and Control for Collision Avoidance at Road IntersectionsDec 08 2016This paper presents the design of a supervisory algorithm that monitors safety at road intersections and overrides drivers with a safe input when necessary. The design of the supervisor consists of two parts: safety verification and control design. Safety ... More
Controlling Robot Morphology from Incomplete MeasurementsDec 08 2016Mobile robots with complex morphology are essential for traversing rough terrains in Urban Search & Rescue missions (USAR). Since teleoperation of the complex morphology causes high cognitive load of the operator, the morphology is controlled autonomously. ... More
Rate-cost tradeoffs in control. Part II: achievable schemeDec 07 2016Consider a distributed control problem with a communication channel connecting the observer of a linear stochastic system to the controller. The goal of the controller is to minimize a quadratic cost function in the state variables and control signal, ... More
Rate-cost tradeoffs in control. Part I: lower boundsDec 07 2016Consider a distributed control problem with a communication channel connecting the observer of a linear stochastic system to the controller. The goal of the controller is to minimize a quadratic cost function in the state variables and control signal, ... More
Collaborative Visual Area CoverageDec 06 2016This article examines the problem of visual area coverage by a network of Mobile Aerial Agents (MAAs). Each MAA is assumed to be equipped with a downwards facing camera with a conical field of view which covers all points within a circle on the ground. ... More
Collaborative Visual Area Coverage using Unmanned Aerial VehiclesDec 06 2016This article addresses the visual area coverage problem using a team of Unmanned Aerial Vehicles (UAVs). The UAVs are assumed to be equipped with a downward facing camera covering all points of interest within a circle on the ground. The diameter of this ... More
Linear Dynamic Network Reconstruction from Heterogeneous DatasetsDec 06 2016This paper addresses reconstruction of linear dynamic networks from heterogeneous datasets. Those datasets consist of measurements from linear dynamical systems in multiple experiment subjected to different experimental conditions, e.g., changes/perturbations ... More
Analytical approach to the multiband filter synthesis and comparison to other approachesDec 06 2016A novel analytical approach to the synthesis of electrical (e.g. analogue, digital or microwave) filters is proposed. This approach allows to obtain lowest possible degree filters with given involved specification including e.g. many pass and stop bands, ... More
A Stochastic Geometry-based Demand Response Management Framework for Cellular Networks Powered by Smart GridDec 06 2016In this paper, the production decisions across multiple energy suppliers in smart grid, powering cellular networks are investigated. The suppliers are characterized by different offered prices and pollutant emissions levels. The challenge is to decide ... More
Review of "Continuous Finite-Time Stabilization of Translational and Rotational Double Integrators"Dec 06 2016We review Bhat et al's paper where a class of bounded, continuous time-invariant finite time stabilizing feedback laws are derived for the double integrator and Lyapunov theory is employed in establishing finite-time convergence.
Review of "Continuous Finite-Time Stabilization of Translational and Rotational Double Integrators"Dec 06 2016Dec 07 2016We review Bhat et al's paper where a class of bounded, continuous time-invariant finite time stabilizing feedback laws are derived for the double integrator and Lyapunov theory is employed in establishing finite-time convergence.
Distributed Gaussian Learning over Time-varying Directed GraphsDec 06 2016We present a distributed (non-Bayesian) learning algorithm for the problem of parameter estimation with Gaussian noise. The algorithm is expressed as explicit updates on the parameters of the Gaussian beliefs (i.e. means and precision). We show a convergence ... More
Distributed Gaussian Learning over Time-varying Directed GraphsDec 06 2016Dec 07 2016We present a distributed (non-Bayesian) learning algorithm for the problem of parameter estimation with Gaussian noise. The algorithm is expressed as explicit updates on the parameters of the Gaussian beliefs (i.e. means and precision). We show a convergence ... More
Robustness of Control Barrier Functions for Safety Critical ControlDec 05 2016Barrier functions (also called certificates) have been an important tool for the verification of hybrid systems, and have also played important roles in optimization and multi-objective control. The extension of a barrier function to a controlled system ... More
Modeling and Control of an Autonomous Three Wheeled Mobile Robot with Front SteerDec 05 2016Modeling and control strategies for a design of an autonomous three wheeled mobile robot with front wheel steer is presented. Although, the three-wheel vehicle design with front wheel steer is common in automotive vehicles used often in public transport, ... More
Impact of Grid Impedance Variations on Harmonic Emission of Grid-Connected InvertersDec 05 2016This paper addresses harmonic magnification due to resonance circuits resulting from interaction between uncertain grid impedance and converter. The source of harmonic may be either the grid or inverter. It is demonstrated that unknown and unpredictable ... More
Voltage Uncertainties in the Presence of Photovoltaic SystemsDec 05 2016With the rising demand for solar energy installation, there is a pressing need for utilities to regulate the voltages at the distribution level. In grids with high penetration of photovoltaic (PV) systems, voltage fluctuations can occur at the distribution ... More
From output regulation theory to flatness based tracking: a bridge for linear systemsDec 05 2016The trajectory tracking problem for multivariable linear systems is considered. Two different techniques are examined: the output regulation theory (ORT) and the flatness based tracking (FBT). ORT and FBT are two different approaches to solve the tracking ... More
A New Type-II Fuzzy Logic Based Controller for Non-linear Dynamical Systems with Application to a 3-PSP Parallel RobotDec 05 2016The concept of uncertainty is posed in almost any complex system including parallel robots as an outstanding instance of dynamical robotics systems. As suggested by the name, uncertainty, is some missing information that is beyond the knowledge of human ... More
Consensus analysis of large-scale nonlinear homogeneous multi-agent formations with polynomial dynamicsDec 05 2016Drawing inspiration from the theory of linear "decomposable systems", we provide a method, based on linear matrix inequalities (LMIs), which makes it possible to prove the convergence (or consensus) of a set of interacting agents with polynomial dynamic. ... More
Vehicle Powertrain Connected Route Optimization for Conventional, Hybrid and Plug-in Electric VehiclesDec 05 2016Most navigation systems use data from satellites to provide drivers with the shortest-distance, shortest-time or highway-preferred paths. However, when the routing decisions are made for advanced vehicles, there are other factors affecting cost, such ... More
Decentralized Frank-Wolfe Algorithm for Convex and Non-convex ProblemsDec 05 2016Mar 17 2017Decentralized optimization algorithms have received much attention due to the recent advances in network information processing. However, conventional decentralized algorithms based on projected gradient descent are incapable of handling high dimensional ... More
Decentralized Projection-free Optimization for Convex and Non-convex ProblemsDec 05 2016Decentralized optimization algorithms have received much attention as fueled by the recent advances in network information processing and the tremendous amount of data that is generated by human activities. However, conventional decentralized algorithms ... More
Gaussian Process Model Predictive Control of Unknown Nonlinear SystemsDec 05 2016Model Predictive Control (MPC) of an unknown system that is modelled by Gaussian Process (GP) techniques is studied in this paper. Using GP, the variances computed during the modelling and inference processes allow us to take model uncertainty into account. ... More
Optimal transport over nonlinear systems via infinitesimal generators on graphsDec 04 2016We present a set-oriented graph-based framework for continuous-time optimal transport over nonlinear dynamical systems. Our approach allows us to recover provably optimal control laws for steering a given initial distribution in phase space to a final ... More
Localization of networked robot systems subject to random delay and packet lossDec 03 2016This paper deals with the localization problem of mobile robot subject to communication delay and packet loss. The delay and loss may appear in a random fashion in both control inputs and observation measurements. A unified state-space representation ... More
Symmetries in the wheeled inverted pendulum mechanismDec 03 2016The purpose of this article is to illustrate the role of connections and symmetries in the Wheeled Inverted Pendulum (WIP) mechanism - an underactuated system with rolling constraints - popularized commercially as the Segway, and thereby arrive at a set ... More
Impact of Dynamic Line Rating on Dispatch Decisions and Integration of Variable RES EnergyDec 02 2016Dynamic line rating (DLR) models the transmission capacity of overhead lines as a function of ambient conditions. It takes advantage of the physical thermal property of overhead line conductors, thus making DLR less conservative compared to the traditional ... More
Storage Management in Modern Electricity Power GridsDec 02 2016This letter introduces a method to manage energy storage in electricity grids. Starting from the stochastic characterization of electricity generation and demand, we propose an equation that relates the storage level for every time-step as a function ... More
Application of Microgrids in Supporting Distribution Grid FlexibilityDec 02 2016Distributed renewable energy resources have attracted significant attention in recent years due to the falling cost of the renewable energy technology, extensive federal and state incentives, and the application in improving load-point reliability. This ... More
Distributed Nash Equilibrium Seeking via the Alternating Direction Method of MultipliersDec 01 2016In this paper, the problem of finding a Nash equilibrium of a multi-player game is considered. The players are only aware of their own cost functions as well as the action space of all players. We develop a relatively fast algorithm within the framework ... More
A controlled experiment for the empirical evaluation of safety analysis techniques for safety-critical softwareDec 01 2016Context: Today's safety critical systems are increasingly reliant on software. Software becomes responsible for most of the critical functions of systems. Many different safety analysis techniques have been developed to identify hazards of systems. FTA ... More
A Game Theoretic Model of Demand Response Aggregator Competition for Selling Stored Energy in Regulated and Unregulated Power MarketsDec 01 2016This work is concerned with the application of game theoretic principles to model competition between demand response aggregators for selling excess energy stored in electrochemical storage devices directly to other aggregators in a power market. This ... More
Frequency Regulation in Islanded Microgrid Using Demand ResponseDec 01 2016Introducing more Distributed Generation (DG) into power grid infrastructure drives more attention to understand how large scale DG affects grid operation. Islanding is an important concern in this area. Islanding refers to the condition that DGs within ... More
Menu-Based Pricing for Charging of Electric Vehicles with Vehicle-to-Grid ServiceDec 01 2016The paper considers a bidirectional power flow model of the electric vehicles (EVs) in a charging station. The EVs can inject energies by discharging via a Vehicle-to-Grid (V2G) service which can enhance the profits of the charging station. However, frequent ... More
Structural Controllability of Multi-Agent Networks: Robustness against Simultaneous FailuresNov 30 2016In this paper, structural controllability of a leader-follower multi-agent system with multiple leaders is studied from a graph-theoretic point of view. The problem of preservation of structural controllability under simultaneous failures in both the ... More
Digraphs with Distinguishable Dynamics under the Multi-Agent Agreement ProtocolNov 30 2016In this work, the ability to distinguish digraphs from the output response of some observing agents in a multi-agent network under the agreement protocol has been studied. Given a fixed observation point, it is desired to find sufficient graphical conditions ... More
On the optimal control problem for a class of monotone bilinear systemsNov 30 2016We consider a class of monotone systems in which the control signal multiplies the state. Among other applications, such bilinear systems can be used to model the evolutionary dynamics of HIV in the presence of combination drug therapy. For this class ... More
Transport Distance on Graphs and Vector-Valued Optimal Mass TransportNov 30 2016In this note, we propose a straightforward notion of transport distance on a graph that is readily computable via a convex optimization reformulation. Similar ideas lead to a Wasserstein distance on vector-valued densities, that allow us to apply optimal ... More
Control Strategy for Anaesthetic Drug Dosage with Interaction Among Human Physiological Organs Using Optimal Fractional Order PID ControllerNov 29 2016In this paper, an efficient control strategy for physiological interaction based anaesthetic drug infusion model is explored using the fractional order (FO) proportional integral derivative (PID) controllers. The dynamic model is composed of several human ... More
Missile Attitude Control via a Hybrid LQG-LTR-LQI Control Scheme with Optimum Weight SelectionNov 29 2016This paper proposes a new strategy for missile attitude control using a hybridization of Linear Quadratic Gaussian (LQG), Loop Transfer Recovery (LTR), and Linear Quadratic Integral (LQI) control techniques. The LQG control design is carried out in two ... More
Simulation studies on the design of optimum PID controllers to suppress chaotic oscillations in a family of Lorenz-like multi-wing attractorsNov 29 2016Multi-wing chaotic attractors are highly complex nonlinear dynamical systems with higher number of index-2 equilibrium points. Due to the presence of several equilibrium points, randomness and hence the complexity of the state time series for these multi-wing ... More
Multi-objective Active Control Policy Design for Commensurate and Incommensurate Fractional Order Chaotic Financial SystemsNov 29 2016In this paper, an active control policy design for a fractional order (FO) financial system is attempted, considering multiple conflicting objectives. An active control template as a nonlinear state feedback mechanism is developed and the controller gains ... More
Fractional Order Fuzzy Control of Hybrid Power System with Renewable Generation Using Chaotic PSONov 29 2016This paper investigates the operation of a hybrid power system through a novel fuzzy control scheme. The hybrid power system employs various autonomous generation systems like wind turbine, solar photovoltaic, diesel engine, fuel-cell, aqua electrolyzer ... More
Fractional Order Load-Frequency Control of Interconnected Power Systems Using Chaotic Multi-objective OptimizationNov 29 2016Fractional order proportional-integral-derivative (FOPID) controllers are designed for load frequency control (LFC) of two interconnected power systems. Conflicting time domain design objectives are considered in a multi objective optimization (MOO) based ... More