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International Design and Test Workshop

作者： F. Bouchafaa S. Arezki M. Boudour E.M. Berkouk Laboratory of Instrumentation and Engineering System University of Sciences and Technology Houari Boumediene Algiers Algeria Laboratory of Process Control Department Electrical engineering National Polytechnic School of Algiers Algiers Algeria

The aim of this paper is to give a solution to unbalance problem of the input DC voltages of the nine-level NPC-VSI in dq synchronous frame. For that, we used in high voltage and great power applications, one two-level PWM current rectifier-nine-level NPC VSI cascade. In the first part, we develop a knowledge model of the nine-level NPC VSI and propose a space vector modulation of this converter using eight bipolar carriers. After that, this study shows particularly the problem of the stability of the DC voltages of the inverter. Then, we propose a solution to the problem by employed closed loop regulation using classic PI regulator mode in d-q synchronous frame. We add a clamping bridge to stabilise the multi DC input voltages of the nine-level NPC VSI. This cascade found applications in great power and high voltage fields as electrical traction.

关键词： Voltage Pulse width modulation inverters Pulse width modulation Clamps Stability Bridge circuits Regulators Power semiconductor switches Instruments systems engineering and theory

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Kinematic modeling of mobile robots by transfer method of augmented generalized coordinates

Kinematic modeling of mobile robots by transfer method of au...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Wheekuk Kim Do Hyung Kim Byung-Ju Yi Bum Jae You Department of Control and Instrumentation Engineering Korea University South Korea School of Electrical Engineering and Computer Science Hanyang University South Korea Intelligent System Control Research Center Korea Institute of Science and Technology South Korea

ISBN: (纸本)0780365763

A kinematic modeling method is proposed which uses augmenting variables to match the dimensions of the input vector and output vector of each serial subchain of the mobile robots. Firstly, kinematic models of various type of wheels are derived including skidding and sliding velocities. Then the method of augmented generalized coordinates is applied to obtain inverse and forward kinematic models. The kinematic models derived by the direct inverse of the augmented matrices provide an accurate solution, which was not achievable by the modeling method based on the pseudo-inverse method which provides an approximate solution. Lastly, two kinematic models for typical, differential-driven mobile robots are presented to show the effectiveness of the proposed modeling method.

关键词： Mobile robots Wheels Electric variables control Intelligent robots Robot kinematics Instruments Computer science Intelligent systems Intelligent control control system synthesis

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Designing iterative learning control subject to actuator limitations using QP methods

Designing iterative learning control subject to actuator lim...

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作者： Longman, Richard W. Mombaur, Katja D. Panomruttanarug, Benjamas Columbia University New York NY 10027 United States LAAS-CNRS Toulouse 31077 France King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand Department of Mechanical Engineering 500 West 120th St. New York NY 10027 United States 7 Avenue du Colonel Roche Department of Control System and Instrumentation Engineering United States

ISBN: (纸本)9781563479458

Iterative learning control (ILC) applies to situations when a system performs a tracking maneuver repeatedly. The error each run is used to adjust the command in the next run, aiming to converge to zero error. Spacecraft applications include making fine pointing equipment follow a precise scan pattern in spite of flexibility effects. Effective ILC design methods are available for linear systems. An important issue is that ILC may reach act uator saturation limits during the iterations with hardware, and then there is no guarantee of convergence. This paper develops ILC methods based on quadratic programming that guarantee convergence under such conditions starting from a feasible trajectory. Copyright © 2008 by the American Institute of Aeronautics Inc.

关键词： Quadratic programming

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Qualitative and quantitative modeling of steam generator in a nuclear power plant using logic processor

Qualitative and quantitative modeling of steam generator in ...

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SICE Annual Conference

作者： Myung-Geun Chun Sam-Sun Ma Myung-Soo Lee Department of Control and Instrumentation Engineering Chungbuk National University Chungbuk South Korea Korea Electric Power Research Institute System and Communication Laboraratory Taejon South Korea

ISBN: (纸本)0780342089

In this work, we propose a qualitative and quantitative modeling method for a steam generator in a nuclear power plant. Modeling the steam generator is known to be difficult due to several facts especially, the dynamics of the steam generator is nonminimum phase which is mainly caused by the swell and shrink phenomena from thermal effects. In order to overcome this difficulty, we adopt logic processor (LP) whose structure itself of the finally trained LPs has a logical meaning to be easily interpreted. In such a manner, we could derive an useful qualitative description model expressing the behavior of the steam generator and a quantitative mathematical model simulating the dynamics of the steam generator simultaneously.

关键词： Power generation Nuclear power generation Logic Mathematical model Neurons Power system modeling Communication system control Instruments Power engineering and energy Thermal engineering

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Architectural Design for Open Intelligent Manufacturing system

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IFAC Proceedings Volumes 1997年第14期30卷 251-254页

作者： Hyoung Joong Kim Gi Taek Kim Byung-Wook Choi Department of Control and Instrumentation Engineering Kangwon National University Chunchon 200-701 Korea Advanced Manufacturing System R&D Office Korea Institute of Industrial Technology Chonan 230-820 Korea

The next generation manufacturing systems will exploit new features from distributed computing, object-oriented software engineering, and Internetworking. In this respect, the role of agents for intelligent manufacturing systems is addressed. This paper mainly surveys the state-of-the-art of the distributed object and agent technologies, which are the core of the intelligent manufacturing systems. Open architecture for interoperability is stressed. Standardization activities are also addressed.

关键词： Intelligent manufacturing systems Intelligent agents Open Architecture Distributed computing Interoperability

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Parallel Byzantine fault tolerance method for blockchain

Parallel Byzantine fault tolerance method for blockchain

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International Conference on Artificial Intelligence, Blockchain, Computing and Security, ICABCS 2023

作者： Dubey, Kumar Pradyot Gnanaprakasam, C.N. Khan, Ihtiram Raza Sadik, Md Shibli Al-Farhani, Liwa H. Ray, Samrat Department of Computer and Information Science Jagadguru Ram Bhadracharya Divyanga University UP Chitrakoot India Department of Electronics and Instrumentation Engineering St. Joseph’s College of Engineering Tamilnadu Chennai India Computer Science Department Jamia Hamdard Delhi India University of Portsmouth Portsmouth United Kingdom System Analysis Control and Information Processing Dep Academy of Engineering RUDN University Moscow Russia The Institute of Industrial Management Economics and Trade Peter The Great Saint Petersburg Polytechnic University Russia

ISBN: (纸本)9781032669663

Enterprise-focused blockchain applications that offer safe, anonymous, and immutable transactions are growing as blockchain technology matures. Traditional blockchain architecture has low performance and scalability, making it unsuitable for enterpriselevel applications with high concurrency and massive data. This paper studies and proposes a simplified Byzantine fault-tolerant (SBFT) consensus algorithm to improve consensus stage efficiency, a Task parallel smart contract model to maximise multi-core system parallel efficiency, and an improved blockchain system architecture to reflect the lightweight, low coupling nature of blockchain technology. It facilitates corporate application secondary development and the ParaChain blockchain and smart contract technology. Experimental verification compares the parallelization - based ParaChain blockchain’s TPS and scalability. PBFT-based blockchain systems have been greatly improved. © 2024 The Author(s).

关键词： Smart contract

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A particle swarm optimization approach for optimal design of PID controller for position control using Shape Memory Alloys

A particle swarm optimization approach for optimal design of...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Rujisak Muangsong Diew Koolpiruck Anak Khantachawana Panadda Niranatlumpong Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Bangkok Thailand Department of Mechanical Engineering King Mongkut's University of Technology Bangkok Thailand Klong Luang Pathum Thani Thailand

This paper presents the optimal design of PID controller based on a particle swarm optimization (PSO) approach for position control using spring shape memory alloys (SMA) actuator. The mathematical model of experimental system had been approximate near the operating point for the PSO algorithm to adjust PID parameters for the minimum integrated absolute error (IAE) condition. The results show the adjustment of PID parameters converting into the optimal point and the good control response base on the optimal values by the PSO technique.

关键词： Particle swarm optimization Springs Temperature Shape Actuators Position control Shape memory alloys

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Mode transition of aqua-plasma generated by micro metal tip surrounded dielectric material in electrolyte

Mode transition of aqua-plasma generated by micro metal tip ...

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IEEE International Conference on Plasma Science (ICOPS)

作者： Sung-Young Yoon Gon-Ho Kim Sang-Heun Lee Young-Ki Hong Jung-Wha Hong Department of Energy System (Nuclear) Engineering Seoul National University Seoul South Korea Department of Rehabilitation Korea University Seoul South Korea Department of Control and Instrumentation Korea University Seoul South Korea

The aqua-plasma, non-thermal plasmas in liquids, can be discharged by forming the vapor coverage by Joule heating on the metal electrode. The electric field is decided by thickness of vapor coverage with applied voltage. It implies that the thickness of vapor coverage is the key parameter to the control the characteristics of aqua-plasma. The aquaplasma electrode consists with discharge tip, dielectric, and counter electrode. The tip covering vapor attaches on the dielectric with high surface tension coefficient. In this work, the effects of dielectric temperature on the mode transition of aqua-plasma are studied. The aqua-plasmas are discharged by applying ac driven voltage on the saline immersed discharge tip, size of 400 μm. The temperature of dielectric is controlled in range of 330 K - 500 K by varying the thickness from 90 μm to 780 μm. Ground electrode is placed under 30 mm of the tip. The V-I signals are monitored by using the voltage and current probes. The aqua-plasma shows three different modes with the thickness of dielectric; Townsend mode, glow-like mode, and spark mode. In case of 0.09 mm, dielectric temperature is relatively low, 330 K, due to thermal conduction from heated electrode to electrolyte. The spark discharge simultaneously occurs with the formation of vapor, 150 μm, with electric field of 5.2 MV/m. The vapor coverage is collapsed by high dose of plasma charge and re-built. In the 0.78 mm, dielectric temperature reaches to 500 K by low thermal conduction. Thickness of vapor coverage increases to 220 μm. The electric field is reduced to 3.4 MV/m and vapor coverage is maintained, Townsend mode streamer discharge takes place. The vapor coverage is oscillating since streamer heats up the vapor surface. In the intermediate dielectric thickness, 0.35 mm, glow-like discharge occurs. Also the rotation temperatures of aquaplasma produced ·OH* (T rot_·OH* ) are estimated by using the Boltzmann plot method on the OES. The two different T rot_·OH* are

关键词： Dielectrics Electrodes Discharges (electric) Plasma temperature Electric fields Legged locomotion

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Design of a Gough-Stewart Platform for micro-surgical operations

Design of a Gough-Stewart Platform for micro-surgical operat...

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IEEE/SICE International Symposium on system Integration

作者： Sung Mok Kim Hoon Lim Joono Cheong Byung Ju Yi Whee Kuk Kim Korea University Chochiwon South Korea Hanyang University Ansan South Korea Department of Control and Instrumentation Engineering Korea University Chochiwon South Korea Department of Electronics System Engineering Hanyang University Ansan South Korea

In general, optimal design for the mechanism such as Gough-Stewart Platform (GSP) does not take into account practical factors of the mechanism such as its component weight and size, and mechanical interferences among them, etc. Particularly, in designing a robot module for micro-surgical operations which would be mounted at the end of a macro manipulator, its light weight, compactness, as well as good kinematic performance are important design aspects that should be considered. In this paper, design of a compact GSP module incorporating additional practical design factors such as mechanical interferences among mechanism components is discussed. A modified design for micro-surgical operations which requires a small operation region represented as a nominal operation point is suggested and it is shown that its performance exceeds one of the typical GSP design under the given practical component limitations such as actual length of active prismatic joints.

关键词： Kinematics Indexes Joints Actuators Service robots Vectors

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A Study of Fast Valving as an Aid to Power system Transient Stability Part I: Some Considerations of control Method for Fast Valving

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IFAC Proceedings Volumes 1977年第1期10卷 1-5页

作者： K. Koyanagi T. Komukai M. Abe Power System Analytical Engineering Section Tokyo Shibaura Electric Co. Ltd. Tokyo Japan Control and Instrumentation Department Power Tokyo Shibaura Electric Co. Ltd. Tokyo Japan

Fast valving could cause second swing instability in a relatively weak system, though it is effective on first swing stability. This paper presents the proposed control methods for fast valving which are concerned with a practical way to control turbine power according to a fault severity and demonstrates their effectiveness by detailed digital simulations performed on a multimachine system.

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