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High-Order Sliding-Mode control for Blood Glucose Regulation in the Presence of Uncertain Dynamics

High-Order Sliding-Mode Control for Blood Glucose Regulation...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Ana Gabriela Gallardo Hernandez Leonid Fridman Ron Leder Sergio Islas Andrade Cristina Revilla Monsalve Yuri Shtessel Arie Levant Universidad Nacional Autonoma de Mexico (UNAM) Department of Control Engineering Faculty Metabolic Diseases Research Unit CMN SXXI Department of Electrical and Computer Engineering University of Alabama in Huntsville Applied Mathematics Department in Tel-Aviv University

ISBN: (纸本)9781424441211

The success of blood glucose automatic regulation depends on the robustness of the control algorithm used. It is a difficult task to perform due to the complexity of the glucose-insulin regulation system. The variety of model existing reflects the great amount of phenomena involved in the process, and the inter-patient variability of the parameters represent another challenge. In this research a High-Order Sliding-Mode control is proposed. It is applied to two well known models, Bergman Minimal Model, and Sorensen Model, to test its robustness with respect to uncertain dynamics, and patients' parameter variability. The controller designed based on the simulations is tested with the specific Bergman Minimal Model of a diabetic patient whose parameters were identified from an in vivo assay. To minimize the insulin infusion rate, and avoid the hypoglycemia risk, the glucose target is a dynamical profile.

关键词： computer algorithms Blood Glucose Variable structure systems Plant uncertain diabetic patient higher-order infusion rate Hypoglycemia Regulation (biology) Standing Orders automatic regulation

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Universal Steganalysis Based on Local Prediction Error in Wavelet Domain

Universal Steganalysis Based on Local Prediction Error in Wa...

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International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Anahita Shojaei-Hashemi Mostafa Mehdipour-Ghazi Shahrokh Ghaemmaghami Hamid Soltanian-Zadeh School of Electrical and Computer Engineering College of Engineering University of Tehran Tehran Iran Electronics Research Institute Sharif University of Technology Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Health System Detroit MI USA Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering College of Engineering University of Tehran Tehran Iran

A passive universal image steganalysis method is proposed that is shown to be of higher detection accuracy than existing truly blind steganalysis methods including Farid's and the WAM. This is achieved by improving some weaknesses of Farid's steganalysis scheme in feature extraction, that is, instead of deriving an over-determined equation system for each sub band of the wavelet decomposition, the sub bands are divided into overlapping blocks and an over-determined equation system is constructed for each block. To guarantee the existence of finite answers, the over-determined equation systems are solved in a way different from Farid's by using Moore-Penrose pseudo-inverse concept. Further improvement to the performance is achieved by adding diagonal directions and increasing the number of moments. The comparative evaluations confirm the superiority of the proposed method over prevalent blind steganalysis schemes.

关键词： Equations Mathematical model Payloads Transform coding Correlation Educational institutions Reliability

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Adaptive disassembly sequence control by using mobile robots and system information

Adaptive disassembly sequence control by using mobile robots...

引用

International Conference on System Theory, control, and Computing (ICSTCC)

作者： A. Radaschin A. Filipescu V. Minzu E. Minca Control Systems Department of Automation and Electical Engineering University Dunarea de Jos of Galati Galati Romania Department of Automation and Electical Engineering University Dunarea de Jos of Galati Romania Department of Automation Computer Science and Electrical Engineering Valahia University of Targoviste Targoviste Romania

Assembly and disassembly processes are similar from the viewpoint of automation. Assembly process is more or less a “classical” subject; disassembly process is more a quite new field. Flexible system are very important issue in the current industry when disassembling and recycling tasks have to be performed. These tasks can be performed by a human operator or by a robot system. In this paper an autonomous robot with manipulator system perform the required task for different operation. This system takes into consideration the necessary task to perform the disassembly of a component using robots synchronization with flexible line process. The proposed algorithm is to distribute the task among the robot and flexible line and takes into consideration the characteristics of each sequence that needs to be followed to perform the required disassembly of the product. The proposed system is validated by experiments using several types of components.

关键词： Planning Assembly Automation Plastics Mobile robots Educational institutions

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Dynamic anti-windup design in anticipation of actuator saturation

Dynamic anti-windup design in anticipation of actuator satur...

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作者： Wu, Xiongjun Lin, Zongli Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing of Ministry of Education Shanghai 200240 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia P.O. Box 400743 Charlottesville VA 22904-4743 United States

ISBN: (纸本)9781457700804

In a traditional anti-windup design, the anti-windup mechanism is set to be activated as soon as the control signal saturates the actuator. A recent innovation of delaying the activation of the anti-windup mechanism, both static and dynamic, until the saturation reaches to a certain level of severity has led to a performance improvement of the resulting closed-loop system. More recently, it has been shown that significant further performance improvements can be obtained by activating a static anti-windup mechanism in anticipation of actuator saturation, in comparison with the delayed activation design. This paper demonstrates that anticipatory activation of a dynamic anti-windup mechanism would also lead to significant performance improvements over both the immediate and delayed activation schemes. © 2011 AACC American Automatic control Council.

关键词： Chemical activation

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Perturbed Learning Automata in Potential Games

Perturbed Learning Automata in Potential Games

引用

IEEE Conference on Decision and control

作者： Georgios C. Chasparis Jeff S. Shamma Anders Rantzer Department of Automatic Control Lund University 221 00-SE Lund Sweden School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332

ISBN: (纸本)9781612848006

This paper presents a reinforcement learning algorithm and provides conditions for global convergence to Nash equilibria. For several reinforcement learning schemes, including the ones proposed here, excluding convergence to action profiles which are not Nash equilibria may not be trivial, unless the step-size sequence is appropriately tailored to the specifics of the game. In this paper, we sidestep these issues by introducing a new class of reinforcement learning schemes where the strategy of each agent is perturbed by a state-dependent perturbation function. Contrary to prior work on equilibrium selection in games, where perturbation functions are globally state dependent, the perturbation function here is assumed to be local, i.e., it only depends on the strategy of each agent. We provide conditions under which the strategies of the agents will converge to an arbitrarily small neighborhood of the set of Nash equilibria almost surely. We further specialize the results to a class of potential games.

关键词： Nash equilibrium learning automata perturbation function Agents Converge New classes global convergence Trivial Learning

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Reduction of Player's Weight by Active Playing Using Motion Sensors

Reduction of Player's Weight by Active Playing Using Motion ...

引用

The 2011 International Conference on Electric and Electronics(EEIC 2011)

作者： Ondrej Krejcar Dalibor Janckulik University of Hradec Kralove FIM Department of Information Technologies VSB Technical University of Ostrava Center for Applied Cybernetics Department of Measurement and Control Faculty of Electrical Engineering and Computer Science

This project was inspired by the idea of the connection of amusement and useful thing respectively the movement by the playing games, because as is known global problem of the Word is increasing obesity caused by the addiction on the PC games at the young people. This project connects pleasurable with useful, respectively playing of the game with physical effort. By the help of the accelerometer is possible to handle by simple games to whose operating is needed physical impulsion of the player. After it would be possible to take up on this project by the beat measurement of the player in order to check on effectivity of the suggested system. Software was programmed in background C#.

关键词： accelerometer weight reducing mobile device C#

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Marginal analysis on binary pairwise Gibbs random fields

Marginal analysis on binary pairwise Gibbs random fields

引用

IEEE International Conference on Automation Science and engineering (CASE)

作者： Tung Le Christoforos N. Hadjicostis Manufacturing Execution and Control Group SIMTech AStar Singapore Coordinated Science Laboratory and Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign IL USA

In this paper, we study marginal problems for a class of binary pairwise Gibbs random fields (BPW-GRFs). Given a BPW-GRF associated with a family of binary positive pairwise potentials, finding the exact marginal for each random variable is typically an NP-hard problem. In this paper, we develop upper and lower bounds of the true marginals in BPW-GRFs. Our bounds can be easily computed via an iteration on appropriate trees that are constructed from the corresponding BPW-GRF graphs. We prove that these marginal bounds outperform existing bounds. We also show via simulations that this improvement is significant on graphs with weak potentials.

关键词： Surface acoustic waves Vegetation Force Markov processes Random variables Probability distribution Algorithm design and analysis

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On the PD~(alpha)-Type Iterative Learning control for the Fractional-Order Nonlinear Systems

On the PD~(alpha)-Type Iterative Learning Control for the Fr...

引用

2011 American control Conference (ACC)

作者： Yan Li YangQuan Chen Hyo-Sung Ahn School of Control Science and Engineering Shandong University Jinan Shandong China Electrical and Computer Engineering Department Utah State University Logan UT USA Department of Mechatronics Gwangju Institute of Science and Technology Gwangju South Korea

In this paper, we discuss in time domain the convergence of the iterative process for fractional-order nonlinear systems. The PD~(alpha)-type iterative learning updating laws are considered. Most of the classical fractional-order cases for linear or nonlinear systems fall into the scheme of this paper. A number of numerical simulations are illustrated to validate the concepts.

关键词： Nonlinear systems Convergence Fractional calculus Equations Simulation Electronic mail

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FPGA implementation of a pipelined 2D-DCT and simplified quantization for real-time applications

FPGA implementation of a pipelined 2D-DCT and simplified qua...

引用

IEEE International Conference on Multimedia Computing and Systems (ICMCS)

作者： Hatim Anas Said Belkouch M. El Aakif Noureddine Chabini Embedded Systems and Digital Control Laboratory University of Cadi Ayyad Marrakech Morocco Department of Electrical and Computer Engineering Royal Military College of Canada Kingston ON Canada

The Discrete Cosine Transform (DCT) is one of the most widely used techniques for image compression. Several algorithms are proposed to implement the DCT-2D. The scaled SDCT algorithm is an optimization of the DCT-1D, which consists in gathering all the multiplications at the end. In this paper, in addition to the hardware implementation on an FPGA, an extended optimization has been performed by merging the multiplications in the quantization block without having an impact on the image quality. Tests using MATLAB environment have shown that our proposed approach produces images with quality comparable to the ones obtained using the JPEG standard. FPGA-based implementations of this proposed approach and the Loeffler's algorithm are proposed and compared in this paper using an Altera Startix FPGA family with the synthesis and implementation tool Quartus II. Results show that our approach outperforms the well known Loeffler's algorithm in terms of processing-speed and resources used.

关键词： Discrete cosine transforms Quantization PSNR Field programmable gate arrays Image coding Transform coding

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Periodic disturbance rejection of a PMSM with adaptive control algorithms

Periodic disturbance rejection of a PMSM with adaptive contr...

引用

IEEE International Conference on Electric Machines and Drives (IEMDC)

作者： Sebastian Maier Johann Bals Marc Bodson Department of System Dynamics and Control Institute of Robotics and Mechatronics German Aerospace Center Wessling Germany Department of Electrical and Computer Engineering University of Utah Salt Lake UT USA

Permanent magnet synchronous motors (PMSMs) produce a parasitic oscillating torque due to several reasons. This contribution cancels the oscillating torque with adaptive control algorithms. Therefore a mathematical model of the PMSM is necessary. A model with nonlinear dynamics and a Fourier approach for the ripples is used as a mathematical description. Through comparisons between measured data and simulated data it is shown that the model assumptions are valid. The adaptive algorithm is implemented as an add-on controller to the already existing control system which consists of a feedforward part and a basis controller. The challenge is that the closed loop system has a resonant frequency and the algorithm should have the same performance for all frequencies. Experimental results show the performance and convergence of the adaptive algorithm at constant and non constant velocity.

关键词： Torque Mathematical model Transfer functions control systems Feedforward neural networks Equations Adaptation models

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