There are many types of bio-signals with various control application prospects. In this work possible control application domain of electroencephalographic signal obtained from an easily available, inexpensive EEG hea...
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There are many types of bio-signals with various control application prospects. In this work possible control application domain of electroencephalographic signal obtained from an easily available, inexpensive EEG headset - Emotiv EPOC was presented. This work also involved application of an embedded system platform. That solution caused limits in choosing an appropriate signal processing method, as embedded platforms characterise with a little efficiency and low computing power. Potential implementation of the embedded platform enables to extend the possible future application of the proposed BCI. It also gives more flexibility, as the platform is able to simulate various environments. In this work traditional, statistical methods were neither used nor described.
An adaptive controller for glucose control in Type 1 Diabetes Mellitus (T1DM) subject is presented in this paper. The proposed control model of T1DM subject involves a known input time-delay, due to the modeling of a ...
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An adaptive controller for glucose control in Type 1 Diabetes Mellitus (T1DM) subject is presented in this paper. The proposed control model of T1DM subject involves a known input time-delay, due to the modeling of a subcutaneous tissues, and a disturbance submodel, where a meal ingestion acts as a measured disturbance. A main MRAC based part of controller for time-delayed systems is supplemented with a heuristic based adaptive disturbance rejection. The controller is verified by means of numerical simulations using an own implementation of T1DM simulator reported in literature.
One-sided concept lattices introduce data mining method from the area of Formal Concept Analysis (FCA) for analysis of objects clusters according to the set of fuzzy attributes. Currently, most of the methods for crea...
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ISBN:
(纸本)9783642323348
One-sided concept lattices introduce data mining method from the area of Formal Concept Analysis (FCA) for analysis of objects clusters according to the set of fuzzy attributes. Currently, most of the methods for creation of one-sided concept lattices process only data tables with one type of truth value structure. In this chapter we describe closure operator, which corresponds to the intersection of particular closure systems obtained from various object-attribute models with different types of attributes. Each particular closure system is defined via one-sided concept lattices approaches applicated for particular data tables.
This paper proposes an approach to a robust state feedback controller design for real uncertain DC-motor system in time domain. Because only output vector of this real system is measurable, it is necessary to observe ...
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This paper proposes an approach to a robust state feedback controller design for real uncertain DC-motor system in time domain. Because only output vector of this real system is measurable, it is necessary to observe state vector. Polytopic model of uncertain system is considered as a plant model to be controlled. Stability and performance of the closed loop system is determined through the LMI region, where the closed loop poles of whole uncertainty domain are placed. To reduce the conservativeness of quadratic stability approach the parameter-dependent Lyapunov function (PDLF) is used.
The paper proposes a quasi-continuous implementation of a continuous control design for a Permanent Magnet Synchronous Motor (PMSM). Based on an idea of exact linearization, the authors present a direct-decoupling str...
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The paper proposes a quasi-continuous implementation of a continuous control design for a Permanent Magnet Synchronous Motor (PMSM). Based on an idea of exact linearization, the authors present a direct-decoupling structure for the PMSM. The main focus of our research is to develop nonlinear control algorithms for the PMSM, which are highly applicable for real-time digital implementation. The experimental results show the effectiveness of the proposed quasi-continuous implementation.
The paper presents a novel frequency domain PID tuning method to achieve specified maximum overshoot and settling time of the closed-loop step response. The method is applicable for linear stable single-input single-o...
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The paper presents a novel frequency domain PID tuning method to achieve specified maximum overshoot and settling time of the closed-loop step response. The method is applicable for linear stable single-input single-output (SISO) systems even if the mathematical model of the plant is unknown. Tuning rule parameters are based on one suitably chosen point of the plant frequency response obtained by sine-wave signal with specified excitation frequency, and the required stability margin. The main result provided is construction of empirical charts that help converting time-domain performance specifications (in terms of maximum overshoot and settling time) into corresponding frequency domain performance measures (stability margins). The method is applicable for systematic shaping of the closed-loop response of the plant. The new approach has been verified on a set of benchmark examples.
Cloud computing becomes more and more popular providing the means to organize and deliver almost any kind of data and software services. Since it is inherently scalable to support rapid economic growth and productivit...
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ISBN:
(纸本)9781479907342
Cloud computing becomes more and more popular providing the means to organize and deliver almost any kind of data and software services. Since it is inherently scalable to support rapid economic growth and productivity, its distributed data storage layer needs to be capable to address these requirements. A distributed file system contains a large number of cluster nodes and a large number of clients interacting with it. In this article, we propose two acceleration mechanisms based on multi-core network SoC to maximize each cluster node performance. First, the requests to the cluster node are balanced evenly on the platform cores, and second the requests are classified to decrease latency of sensitive operations and improve the overall cluster responsiveness and availability. For implementation, tests and measurements we have used a novel open source distributed file system: Ceph. Among many advantages over the competitors of Ceph we mention preservation of POSIX API, completely decoupled data and metadata and usage of object storage devices instead of block devices.
The paper presents a unified frequency-domain methodology for designing robust continuous-and discrete-time controllers for both MIMO and SISO uncertain systems. The generalized design procedure is based on the Equiva...
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The paper presents a unified frequency-domain methodology for designing robust continuous-and discrete-time controllers for both MIMO and SISO uncertain systems. The generalized design procedure is based on the Equivalent Subsystems Method (ESM) – a frequency-domain decentralized controller design method guaranteeing required performance for the full system. Plant-wide performance specification in terms of maximum overshoot and settling time is translated into frequency domain performance measures (phase margin and bandwidth frequency). Generating equivalent subsystems allows applying independent design of the resulting decentralized controller for both SISO and MIMO systems. Robust stability conditions are integrated in the ESM. The design procedure is applied to design a discrete-time robust decentralized PID controller for a non-minimum phase system.
Topics of this article concern the study of the fundamental nature of the sonoluminescence phenomenon occurring in liquids. At the Institute of electrical Power engineering at Opole University of Technology the intere...
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Topics of this article concern the study of the fundamental nature of the sonoluminescence phenomenon occurring in liquids. At the Institute of electrical Power engineering at Opole University of Technology the interest in that phenomenon known as secondary phenomenon of cavitation caused by ultrasound became the genesis of a research project concerning acoustic cavitation in mineral insulation oils in which a number of additional experiments performed in the laboratory aimed to determine the influence of a number of acoustic parameters on the process of the studied phenomenona. The main purpose of scientific research subject undertaken was to determine the relationship between the generation of partial discharges in high-voltage power transformer insulation systems, the issue of gas bubbles in transformer oils and the generated acoustic emission signals. It should be noted that currently in the standard approach, the phenomenon of generation of acoustic waves accompanying the occurrence of partial discharges is generally treated as a secondary phenomenon, but it can also be a source of many other related phenomena. Based on our review of the literature data on those referred subjects taken, it must be noted, that this problem has not been clearly resolved, and the description of the relationship between these phenomena is still an open question. This study doesn't prove all in line with the objective of the study, but can be an inspiration for new research project in the future in this topic. Solution of this problem could be a step forward in the diagnostics of insulation systems for electrical power devices based on non-invasive acoustic emission method.
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