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Mediterranean Conference on control and Automation (MED)

作者： Z. Szabó J. Bokor Institute for Computer Science and Control Hungarian Academy of Sciences Hungary Institute for Computer Science and Control MTA-BME Control Engineering Research Group Hungary

While sensors play an important role in the control loop, in practice they often are considered to be a part of the plant and the explicit interaction between the plant and sensor is disregarded in the further considerations. Based on an input/output perspective, this paper investigates the internal stability property of the control loop when this interface is considered explicitly. As a main result of the paper, we provide a Youla type characterization of all the sensors that renders the loop stable for a fixed plant and controller.

关键词： Sensitivity Feedback loop Stability criteria Optimization Linear systems Complexity theory Sensor fusion

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Future of the Smith predictor based regulators comparing to Youla Parametrization

Future of the Smith predictor based regulators comparing to ...

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Mediterranean Conference on control and Automation (MED)

作者： L. Keviczky Cs. Banyasz Computer and Automation Research Institute and Control Engineering Research Group Hungarian Academy of Sciences (ATOMKI) Hungary

The paper is a short tutorial like discussion on the applicability and the future of the classical Smith predictor. This evaluation shows that the Smith predictor is a subclass of the Youla parametrization based generic two-degree of freedom controllers. The application of the modern, new approach is suggested having much wider design possibilities.

关键词： Regulators Delay effects Optimized production technology control systems Automation control engineering History Signal processing Predictive models Open loop systems

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Investigating H2 optimality of two-degree of freedom control systems

Investigating H2 optimality of two-degree of freedom control...

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Mediterranean Conference on control and Automation (MED)

作者： L. Keviczky Cs. Banyasz Computer and Automation Research Institute and Control Engineering Research Group Hungarian Academy of Sciences (ATOMKI) Hungary

The control error in a generic two-degree of freedom (TDOF) control system has three major parts: design, realizability, and modeling loss. The paper investigates the optimality of the second term in this decompositio... 详细信息

关键词： Hydrogen Optimal control control systems Error correction Mathematical model control system synthesis Automatic control Transfer functions Regulators Degradation

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CAD CAM MANUFACTURING OF PROTOTYPE SHIPBOARD COMPONENTS

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NAVAL ENGINEERS JOURNAL 1990年第3期102卷 93-99页

作者： CALVERT, TE RODRIGUEZ, FA SLEBZAK, JS Thomas E. Calvert P.E.: is a senior project engineer with the Propulsion and Auxiliary Systems Department David Taylor Research Center Annapolis Md. His interests include application of computers to all aspects of engineering with particular emphasis on utilization of small computers. Mr. Calvert is a licensed professional engineer in Maryland. He received a BSEE from Drexel University in 1969 and since that time has completed a number of graduate courses related to machinery acoustics. Francisco A. Rodriguez:is an engineer with the Propulsion and Auxiliary Systems Department David Taylor Research Center. He was formerly with the Computer-Aided Design/Interactive Graphics Group of the Division of Engineering and Weapons U.S. Naval Academy. His interests include interfacing the computer aided design to the computer aided manufacturing along with related software and hardware development. Mr. Rodriguez received a BSEEfrom the University of Virginia in 1968. James S. Slebzak:is a mechanical engineering technician with the Propulsion and Auxiliary Systems Department David Taylor Research Center. He received his machinists papers in 1971 after serving his apprenticeship at David Taylor Research Center. He continued his education and became the senior numerical control programmer at the Annapolis Laboratory. He completed his mechanical technology degree from Anne Arundel Community College in 1986. His interests are in the application of numerically controlled manufacturing techniques to prototype machinery components.

The machine shop at the Annapolis Laboratory of the David Taylor research Center (DTRC) provides model making and prototype support to a large variety of naval ship related engineering projects. In order to meet these challenging requirements, computer aided design/computer aided manufacturing (CAD/CAM) techniques are being used to produce one of a kind prototypes or very low volume production parts. The use of computer aides in these cases is to facilitate the accurate manufacture of a difficult part, rather than to improve manufacturing efficiencies. In addition, the approach provides the flexibility required to support research and development projects. Several examples of prototype shipboard components manufactured using CAD/CAM techniques are presented in this paper. The hardware and software that facilitated these projects are discussed. The examples described have met the requirements to produce a wide variety of prototype shipboard machinery components quickly and accurately.

关键词： Ship Equipment

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MARS: Multi-Agent Deep Reinforcement Learning for Real-Time Workflow Scheduling in Hybrid Clouds with Privacy Protection 30

MARS: Multi-Agent Deep Reinforcement Learning for Real-Time ...

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30th IEEE International Conference on Parallel and Distributed Systems, ICPADS 2024

作者： Cheng, Long He, Haoyang Gu, Yan Liu, Qingzhi Zhao, Zhiming Fang, Fang North China Electric Power University State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer Engineering Beijing China Wageningen University and Research Information Technology Group Netherlands University of Amsterdam Research Group of Multi-Scale Networked Systems Netherlands

ISBN: (纸本)9798331515966

Scheduling workflows in hybrid cloud environments presents significant challenges due to the inherent complexity of workflows and the dynamic nature of cloud resources. This complexity is further increased when attempting to balance workflow performance with privacy protection. Recent efforts have leveraged deep reinforcement learning (DRL) to address these challenges. However, most of these approaches rely on single-agent models, which can lead to security issues and scalability problems due to their centralized processing. Specifically, the properties of workflows are transferred to the single agent, which risks leaking privacy information. Our paper addresses these issues by introducing MARS, a real-time workflow scheduling method that prioritizes privacy protection in hybrid clouds. MARS leverages multi-agent deep reinforcement learning (MADRL) to optimize the workflow scheduling of cloud virtual machines (VMs). The benefit of our solution is that it relies on the collaborative learning of multi-agents on multiple VMs, which could assign user data to specific cloud servers for privacy protection while sharing training experiences between agents. In our implementation, MARS aims to reduce workflow completion time and operational costs while complying with strict privacy protection guidelines. The experimental results demonstrate that MARS can significantly surpass existing methods, reducing makespan by an average of 53.18% and costs by 61.98% compared to basic techniques, and achieving 20.26% and 25.71% improvements over the latest advanced methods, respectively. © 2024 IEEE.

关键词： Deep reinforcement learning

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A hyperbolic view on robust control

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IFAC Proceedings Volumes 2014年第3期47卷 718-723页

作者： Z. Szabó J. Bokor T. Vámos Institute for Computer Science and Control Hungarian Academy of Sciences Hungary (Tel: +36-1-279-6171 Institute for Computer Science and Control Hungarian Academy of Sciences Hungary MTA-BME Control Engineering Research Group

The intention of the paper is to demonstrate the beauty of geometric interpretations in robust control. We emphasize Klein's approach, i.e., the view in which geometry should be defined as the study of transformations and of the objects that transformations leave unchanged, or invariant. We demonstrate through the examples of the basic control tasks that a natural framework to formulate different control problems is the world that contains as points the equivalence classes determined by the stabilizable plants and whose natural motions are the Möbius transforms. Transformations of certain hyperbolic spaces put light into the relations of the different approaches, provide a common background of robust control design techniques and suggest a unified strategy for problem solutions. Besides the educative value a merit of the presentation for control engineers might be a unified view on the robust control problems that reveals the main structure of the problem at hand and give a skeleton for the algorithmic development.

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Logo recognition using retinal coding

Logo recognition using retinal coding

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Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and computers

作者： Zyga, Kathleen J. Schroeder, Jim Price, Richard Sensors Division U.S. Air Force Research Laboratory School of Electrical and Computer Engineering University of Adelaide Australia Intelligence Analysis Group Command and Control Division Defence Science and Technology Organisation Australia

This research is an effort to model the structure and functionality of the human retina for use as an automatic identification system for logo images in document processing. Scale, rotation, noise, and distortion invariant identification is achieved using a suitable classification algorithm and a reference database. The human pulvinar is also used as a model for visual attention and logo detection within a page image. Test results show high correct identification rates, and robustness in all types of distortion. © 2004 IEEE.

关键词： Image coding

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A New Iterative Procedure to Obtain H-infinity, L-infinity Optimal Regulators

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IFAC Proceedings Volumes 2008年第2期41卷 8791-8796页

作者： L. Keviczky Cs. Bányász Computer and Automation Research Institute and Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 HUNGARY

The sensitivity function in a generic two-degree of freedom ( TDOF ) control system can be decomposed into three major parts: design-, realizability- and modeling-loss. The paper investigates the optimality of the sec... 详细信息

关键词： Optimal regulator error decomposition Youla-parametrization

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New adapted forms of P-V optimal slope MPPT for a better grid connected PV system integration

New adapted forms of P-V optimal slope MPPT for a better gri...

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2017 IEEE International Conference on Industrial Technology, ICIT 2017

作者： Sandali, Abdelhalim Cheriti, Ahmed Advanced Control of Electrical Systems Team - LESE ENSEM University Hassan II Casablanca Casablanca Morocco Research Group in Industrial Electronics Department of Electrical and Computer Engineering University of Québec at Trois-Rivieres Canada

ISBN: (纸本)9781509053209

The work presented in this paper describes an improvement of a P-V optimal slope MPPT technique. To achieve this improvement, all the degrees of freedom of the inverter control are exploited. Two forms are then established. Modeling and design of a PV power plant using these improved forms are performed. The results are validated by simulation in the Matlab-Simulink environment. © 2017 IEEE.

关键词： MATLAB

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Synchronising second-order multi-agent systems under dynamic topology via reference model-based algorithm

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Journal of control and Decision 2014年第3期1卷 214-225页

作者： Jiahu Qin Huijun Gao Tasawar Hayat Fuad E.Alsaadi Department of Automation University of Science and Technology of ChinaHefeiChina Research School of Engineering Australian National UniversityCanberraAustralia Research Institute of Intelligent Control and Systems Harbin Institute of TechnologyHarbinChina Nonlinear Analysis and Applied Mathematics Group King Abdulaziz University(KAU)JeddahSaudi Arabia Faculty of Engineering Department of Electrical and Computer EngineeringKing Abdulaziz UniversityJeddahSaudi Arabia Department of Mathematics Quaid-I-Azam UniversityIslamabadPakistan

This paper revisits the synchronisation problem for second-order multi-agent systems(MASs)under dynamically changing communication *** employing the reference model-based synchronisation algorithm,it is finally shown that synchronisation for both the position and velocity states can be achieved if the union of the communication topologies has a directed spanning tree frequently *** extends the existing results obtained for second-order MASs which exploits mild communication topology condition guaranteeing the synchronisation to a more general *** analysis is successfully performed by exploiting the product properties of row-stochastic matrices,which can also provide us with an estimate the convergence rate towards the synchronisation.

关键词： synchronisation double-integrator agents weakest possible communication topology rate of convergence

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