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International Conference on Soft Computing and Machine Intelligence (ISCMI)

作者： Gai Ge Wang Suash Deb Amir H. Gandomi Zhaojun Zhang Amir H. Alavi School of Computer Jiangsu Normal University Xuzhou China Dept. of Computer Science Engineering Cambridge Institute of Technology Ranchi INDIA Dept. of Civil Engineering University of Akron Akron USA School of Electrical Engineering and Automation Jiangsu Normal University Xuzhou China Dept. of Civil and Environmental Engineering Michigan State University East Lansing USA

This study proposes a novel chaotic cuckoo search (CCS) optimization method by introducing chaotic theory into cuckoo search (CS) algorithm. In CCS, chaos characteristics are combined with the CS with the intention of further enhancing its performance. Further, the elitism scheme is incorporated into CCS in order to preserve the best cuckoos. In the CCS method, twelve chaotic maps are applied to tune the step size of the cuckoos used in the original CS method. Twenty-two benchmark functions are utilized to investigate the efficiency of CCS. The results show that the performance of CCS together with a suitable chaotic map are comparable as well as superior to that of the CS and other metaheuristic algorithms.

关键词： Optimization Benchmark testing Sociology Statistics Chaos Electronic mail Algorithm design and analysis

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On improved modeling and simulation of wireless communication systems using multiagent and multi-threading systems architectures for efficient spectrum reuse

On improved modeling and simulation of wireless communicatio...

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Telecommunications Forum (TELFOR)

作者： P.M. Papazoglou D.A. Karras R.C. Papademetriou Sterea Hellas Institute of Technology Greece Dept. Automation Sterea Hellas Institute of Technology Chalkis Greece Dept. Electronics and Computer Engineering Univ. of Portsmouth Anglesea Road UK

Efficient design and evaluation of complex wireless communication systems in terms of spectrum reuse can be accomplished using advanced simulation environments. To this goal, network modelling and simulation methodologies are the most critical issues, thus, several Discrete Event Simulation (DES) schemes have been introduced in the literature. In a real wireless network, services such as new call admission, reallocation, etc, should be offered at the same time for different mobile users in the network coverage area. Thus, the network modelling must be based on the network operational concurrency and services independence. The simulation model adaptation to real network behaviour is a challenging goal. Herein, a novel simulation methodology based on multi-threading for simulating wireless networks, compared to the state of the art approach, is presented, preliminarily analyzed and discussed. Moreover, various implementations based on multi-threading and multi-agent concepts are also presented and evaluated.

关键词： Instruction sets Channel allocation computer architecture Computational modeling Wireless networks Calendars Mathematical model

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Application of adaptive notch filter for resonance suppression in industrial servo systems

Application of adaptive notch filter for resonance suppressi...

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International Conference on Control, automation and Systems ( ICCAS)

作者： Wook Bahn Jong-Min Yoon Nyeon-Kun Hahm Sang-Sub Lee Sang-Hoon Lee Dong-Il Cho Dept. of Electrical and Computer Engineering Seoul National University Seoul Korea RS Automation Co. Ltd. Gyeonggi-do Korea

This paper presents an application of an adaptive notch filter (ANF) for resonance suppression in industrial servo systems. An on-line frequency estimator is utilized for estimating the resonant frequency. The current command of the servo system is an input to the frequency estimator. The ANF automatically changes its notch frequency according to the estimated resonant frequency values and suppress the resonance. Experiments are performed using an industrial servo system with a belt-drive type load for various load conditions. Results show that the controller with the developed ANF identifies the changes in the resonant frequency well and therefore successfully suppresses the resonance.

关键词： Damping Torque

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Remote master-slave control of a 6D manipulator for cardiac surgery application

Remote master-slave control of a 6D manipulator for cardiac ...

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IEEE International Conference on Robotics and Biomimetics

作者： Yu Yang Haoyao Chen Yunjiang Lou Wei Lin School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Graduate School Shenzhen China Dept. of Electrical Engineering and Computer Science Case Western Reserve University USA

ISBN: (纸本)9781479973989

Intelligent robots have been using widely in medical field for the high precision, long working period, and lower costs. The integration of teleoperation system into surgical robots makes the remote surgery possible. This paper focuses on the force feedback and intelligent motion planning that enables master-slave control of heterogeneous manipulators. The slave arm works in a different scene from the master manipulator, which means that the arm assembled surgical instruments can't repeat master manipulator motion mechanical. To address the heterogeneous problem, the collision free trajectory is generated based on both manipulators' kinematic model and sample-based path planner. To improve the safety of surgical robots, virtual feedback-force is produced according to the distance between surgical instrument and the edge of surgical safe workspace.

关键词： Surgery Phantoms Manipulators Planning Trajectory Instruments

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PV Arc-fault Detection using Spread Spectrum Time Domain Reflectometry (SSTDR)

PV Arc-fault Detection using Spread Spectrum Time Domain Ref...

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IEEE Energy Conversion Congress and Exposition

作者： Mohammed Khorshed Alam Faisal H. Khan Jay Johnson Jack Flicker Power Engineering and Automation Research Lab (PEARL) Dept. of Electrical and Computer Engineering University of Utah Salt Lake City Utah USA Sandia National Laboratories Albuquerque NM USA

ISBN: (纸本)9781479957774

A PV arc-fault detection technique using spread spectrum time domain reflectometry (SSTDR) method has been introduced in this paper. SSTDR is a reflectometry method that has been commercially used for detecting aircraft wiring faults although SSTDR could be potentially used for many other applications. We have used SSTDR for detection of both ground and arc faults in a PV array. It has been demonstrated that SSTDR can be used for detection of both series and parallel arcs, and it has the potential to predict the presence of future arc faults by detecting the change in impedance - even in absence of light or at very low solar irradiance. This method does not require frequency domain analysis of voltage or current signal and can detect the presence of arc regardless of the operating state of the inverter.

关键词： Circuit faults Correlation Arrays Fault detection Resistance Noise Hardware

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Tuningless servo controller using variable structure control and disturbance compensation

Tuningless servo controller using variable structure control...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Wook Bahn Dong-Il Dan Cho Sang-Hoon Lee Sang-Sub Lee Dept. of Electrical and Computer Engineering Seoul National University Seoul Korea RS Automation Co. Ltd. Pyeongtaek-si Gyeonggi-do Korea

This paper presents a new tuningless control algorithm for a DC servo drive to minimize parameter tuning efforts by an operator. This tuningless algorithm is based on a nonlinear control method, utilizing variable structure control and disturbance compensator. Experiments are performed using a 400 W Tamagawa servo motor and a belt drive load, which is a common combination in automation applications. The performance of the developed method is compared with the conventional servo drive controller, which is manually tuned by an experienced engineer. The experimental results show that the developed tuningless control exhibits excellent performance and is applicable to various load conditions.

关键词： Servomotors Robustness Tuning Estimation Vectors Load modeling

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Cyber-physical components for heterogeneous modelling, validation and implementation of smart grid intelligence

Cyber-physical components for heterogeneous modelling, valid...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Gulnara Zhabelova Chen-Wei Yang Sandeep Patil Cheng Pang Jeffrey Yan Anatoly Shalyto Valeriy Vyatkin Department of Computer Science Lulea Tekniska Universitet Sweden Department of Electrical Engineering and Automation Aalto University Finland Dept. of Electrical and Computer Engineering University of Auckland New Zealand ITMO University St. Petersburg Russia

This paper presents a practical framework to bring the cyber-physical block diagram models, such as Ptolemy, to the practice of industrial automation. Cyber-Physical Component (CPC) architecture is suggested. CPC aims at the improvement of design, verification and validation practices in automation of Smart Grid. IEC 61499 standard is used as a basis for this architecture. This architecture addresses several design software and system engineering challenges: right equilibrium between abstract representation and “executability” and round-trip engineering. An CPC exhibit such properties as portability, interoperability and configurability thanks to the reliance on open standards. The use of time stamp based execution paradigm adds determinism and predictability at the run-time.

关键词： Computational modeling computer architecture IEC standards Smart grids Peer-to-peer computing Object oriented modeling Process control

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Control of 400 Watt Belt-Drive and 400 Watt Ball-Screw Servo Systems Using Discrete-Time Variable Structure Control

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IFAC Proceedings Volumes 2014年第3期47卷 8378-8383页

作者： Wook Bahn Sang-Hoon Lee Sang-Sub Lee Dong-II “Dan” Cho ASRI/ISRC Dept. of Electrical and Computer Engineering Seoul National University Seoul Korea RS Automation Co. Ltd. 38 Jinwisandan-ro Jinwi-myeon Pyeongtaek-si Gyeonggi-do Korea

This paper develops a discrete-time variable structure control method for servo drives. The objective is to achieve tungless control in industrial servo systems. The developed control method is experimentally evaluated for load variations and parameter uncertainties. Experiments are performed on typical automation applications: a 400 W servo motor with a belt-drive connection and a 400 W servo motor with a ball-screw connection. The experimental results show that the developed discrete-time variable structure controller provides better performance characteristics than the conventional commercial servo controller.

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Controller Modification Applied for Active Fault Detection

Controller Modification Applied for Active Fault Detection

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American Control Conference

作者： Henrik Niemann Jakob Stoustrup Niels Kjolstad Poulsen Dept. of Electrical Engineering Automation and Control Tech. University of Denmark DK-2800 Kgs. Lyngby Denmark Dept. of Electronic Systems Automation & Control Aalborg University DK-9220 Aalborg Denmark Dept. of Applied Mathematics and Computer Science Tech. University of Denmark DK-2800 Kgs. Lyngby Denmark

ISBN: (纸本)9781479932757

This paper is focusing on active fault detection (AFD) for parametric faults in closed-loop systems. This auxiliary input applied for the fault detection will also disturb the external output and consequently reduce the performance of the controller. Therefore, only small auxiliary inputs are used with the result that the detection and isolation time can be long. In this paper it will be shown, that this problem can be handled by using a modification of the feedback controller. By applying the YJBK-parameterization (after Youla, Jabr, Bongiorno and Kucera) for the controller, it is possible to modify the feedback controller with a minor effect on the external output in the fault free case. Further, in the faulty case, the signature of the auxiliary input can be optimized. This is obtained by using a band-pass filter for the YJBK parameter that is only effective in a small frequency range where the frequency for the auxiliary input is selected. This gives that it is possible to apply an auxiliary input with a reduced amplitude. An example is included to show the results.

关键词： Active fault detection parametric faults feedback controllers YJBK parameterization controller modification

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Intelligent algorithms based on data processing for modular robotic vehicles control

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WSEAS Transactions on Systems 2014年第1期13卷 242-251页

作者： Papoutsidakis, Michail Piromalis, Dimitrios Neri, Filippo Camilleri, Michel Department of Automation Technological Institute of Piraeus P.Ralli and Thivon 250 Athens Greece Dept. of Electrical Engineering and Information Technology University of Napoli Federico II Via Claudio 21 Naples Italy Dept. of Computer Information Systems University of Malta MSD 2080 Malta

One of the numerous implementations that the Intelligent Systems Lab of the Technological Institute of Piraeus, Greece, has recently accomplished is described in this paper. Within the area of hand-on autonomous robotics, the project combines computer science in modern wireless network protocol communication, with microcontroller-based intelligent motion-control tasks. The design of the presented pair of versatile robots is intended for a "predator and prey" application domain. Both robot designs are based on low cost and easy to find equipment, though modern and up-to-date technology. Two different multitasking and flexible algorithms are designed in order to investigate their performance and compare the outcomes. In particular, an intelligent algorithm based on data capturing and processing within a tolerable elapsed time is presented, with two different performance scenarios explained and compared in detail.

关键词： Intelligent systems

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