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Control theory can establish properties of systems which hold with all signals within the system and hence cannot be proven by simulation. The most basic of such property is the stability of a control subsystem or the overall system. Other examples are statements on robust control performance in the face of dynamical uncertainties and disturbances in sensing and actuation. Until now these theories...
This electronic document is a “live” template and already defines the components of your paper [title, text, heads, etc.] in its style sheet. The paper considers the possibility and necessity of using in modern control and training systems with a natural language interface methods and mechanisms, characteristic for knowledge processing systems. This symbiosis assumes the introduction of specialized...
Software Defined Networking (SDN) and Network Function Virtualization (NFV) are catching the attention of telecom operators. Telecom environments establish a set of Carrier Grade requirements such as high availability, high throughput and low latency. To address these challenges SDN deploys logically-centralized controllers, such as ONOS and OpenDayLight. Based on the JAIN SLEE component model, which...
Software-defined networks (SDN) are vulnerable to most of the attacks that traditional networks are vulnerable to. In addition, SDN has introduced new vulnerabilities through its unique architecture such as those related to the southbound and northbound controller interfaces. In this paper, we introduce a lightweight flow-based Intrusion Detection System (IDS) that periodically gathers statistical...
Information-Centric Networking (ICN) has emerged as an interesting approach to overcome many of the limitations of legacy IP-based networks. However, the drastic changes to legacy infrastructure required to realise an ICN have significantly hindered its adoption by network operators. As a result, alternative deployment strategies are investigated, with Software-Defined Networking (SDN) arising as...
This paper presents a teaching/learning experiment running in the laboratorial curricular unit Project I of the 4'h year of the Integrated Master in Industrial Electronics and Computers Engineering at the University of Minho. Project specifications were defined by the three teachers involved in the experience and students were encouraged to look on different solutions for a real-word problem. In a...
This article discusses the general structure of the CNC control system with the Soft PLC module which was implemented as an external unit. The advantages of reducing the EtherCAT cycle, increasing control system reliability and disadvantages associated with the additional cost of the proposed solution were investigated. The proposed solution also uses the external Soft PLC instead of the safety controller...
This study is concerned with the robust H∞ control problem for dynamic positioning (DP) ships based on sampled-data. Input delay approach is used to convert the sampled-data DP ship system to a system with time-varying delay. Adequate condition is derived to determine the system's asymptotical stability and establish H∞ performance. Then sampled-data controller is obtained by means of linear matrix...
Provides an abstract for each of the special or tutorial presentations and a brief professional biography of each presenter. The complete presentations were not made available for publication as part of the conference proceedings.
In this paper, stability properties for discrete-time dynamical systems with set-valued states are studied. We use previous results on detectability and invariance properties to present an extension of Krasovskii and Lyapunov stability results for set dynamical systems, under the assumption of outer semicontinuity of the set-valued maps that define the system's dynamics. We also propose a formulation...
On December 23, 2015, a “temporary malfunction of the power supply” in three provinces in Ukraine resulted in power outages that lasted up to six hours and affected 225,000 customers. Following the event, an investigation identified evidence that several regional Ukraine power control systems had been compromised by cyber attacks. This was the first publicly documented successful cyber attack on an...
Design and implementation of a PEM fuel cell controller presented. The intelligent controller design is based on a neuro-fuzzy algorithm. The implemented system has successfully controlled the air mass flow rates of the fuel cell stack using labview programming. The real-time data shows the effectiveness of the proposed smart controller algorithm.
Chemical coagulation process efficiently removes both natural organic matter and small colloidal particles that have negative impacts on taste, smell and appearance of treated water. The current practice requires regular manual intervention. In smaller WTPs, often serving remote communities, regular intervention by experienced operators is not feasible and, hence, coagulant overdosing and underdosing...
Operator situational awareness in Nuclear Power Plant (NPP) control rooms is quintessential in ensuring plant safe operation. Towards improving situational awareness, a novel framework of the EYE - Expert Supervisory System capable of visually monitoring human machine interfaces (HMI) in cyber physical system (CPS) is proposed with target application in NPP control room environment. EYE applied on...
Technological advancement of Industrial Control Systems (ICS) and control systems automation over the past decade has brought greater interconnections of the control components. Increased interconnection provides end users with more information which facilitates improved system reliability. Modern control communication systems such as ModbusTCP are based on open standards that leverage Ethernet to...
With the number of Phasor Measurement Units (PMUs) in the North American power grid scaling up into the thousands, system operators are gradually inclining towards distributed cyber-physical architectures for executing wide-area monitoring and control operations using Synchrophasors. Traditional centralized approaches, in fact, are anticipated to become untenable soon due to various factors such as...
Smart home technology can improve the quality of life for inhabitants of homes. This technology allows the inhabitants to monitor their home and any electrical device locally or remotely via computerized central control. Despite the advances in the smart home technologies, people with disabilities - particularly those with quadriplegia, - will not be able to utilize the currently available techniques...
The efficiency and maintainability of fault tolerance mechanisms in a computer system has typically not been a major topic of concern, mostly because fault tolerance is a non-functional system requirement. This paper proposes a Holistic Fault Tolerance architecture, based on a centralised fault tolerance management, with related functionality distributed across the entire system. The most suitable...
In this paper we proposed the method of correcting codes formation based on Residue Number System. The proposed method provides the formation of RNS correcting codes of the input data which is represented in a positional notation.
The paper proposes a new approach for FPGA reconfiguration based on usage of the open-source synthesis and place-and-route tools. The well-known partial reconfiguration technologies assume pre-compilation of all required FPGA configurations by the designer. In autonomous intelligent control systems it can become quite a strong limitation, due to control law couldn't be changed on-board without using...
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