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The use of genetic algorithms for speed and current controller designs for IPMSM drive

The use of genetic algorithms for speed and current controll...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Pakorn Chottiyanont Mongkol Konghirun Wanchak Lenwari Dept. of Electrical Engineering King Mongkut's University of Technology Thonburi Thailand Dept. of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Thailand

ISBN: (纸本)9781479951635

Recently, speed and current controller have been developed for interior permanent magnet synchronous motor (IPMSM). Each method has its own advantage and limitation. However, in the commercial drive system, the controller should be easy to set up and tune in particular for operator, therefore the classical proportional plus integral (PI) controller has widely used due to its simple structure while achieving zero steady-state error. However finding out the parameters of the controller is not any easy task because of complex dynamics of IPMSM. For this reason, this paper presents a novel automated design employed genetic algorithm (GA) to optimize PI speed and current controller of IPMSM. The drive control system is designed on the basis of vector control scheme incorporated with the maximum torque per ampere (MTPA) control strategy to improve the drive performance. Simulation and experimental results verify the effectiveness of the proposed method.

关键词： Torque Optimization Genetic algorithms Stators Mathematical model Simulation Sociology

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New algorithm for the loss of excitation function

New algorithm for the loss of excitation function

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International Conference on Green Computing Communication and Electrical engineering (ICGCCEE)

作者： G. Priyadharshini M. Mynavathi M. Sowmiya Dept of Instrumentation and Control Engineering Sethu Institute of Technology Madurai India Dept of Electrical and Electronics Engineering Dr.N.G.P. Institute of technology Coimbatore India Power System Engineering Thiagarajar College of Engineering Madurai India

ISBN: (纸本)9781479949816

Loss of field is one of the incidents that threats synchronous generators and power systems. After the excitation is lost, rotor current decays at a rate determined by the field circuit time constant. The internal generator voltage will decay at the same rate. Then the machine behaves as an asynchronous generator and draws a high quantity of reactive power from the network. The active power output will intensely oscillate and excessive current will traverse through stator windings. In this paper two protection methods are considered. The first one is based on conventional impedance method which consists of offset Mho relay for the fast detection of loss of field in synchronous generators. The second one is based on the measurement of the three phase reactive power output of the machine, and monitors the direction and magnitude of leading reactive power at the generator output terminal. It mainly aims to develop algorithms for the conventional impedance method and the reactive power method. The comparison of these two methods is also carried out to find out the method in which quick tripping results can be obtained. A two machine system is used in case studies and is modeled using MATLAB simulink.

关键词： Generators Reactive power Relays Impedance Rotors Impedance measurement

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Simulation and experimental study on attitude control of quadrotor

Simulation and experimental study on attitude control of qua...

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IEEE International Conference on Robotics and Biomimetics

作者： Nuttakorn Trirattanawananon Benjamas Panomruttanarug Kohji Higuchi Félix Mora-Camino Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Graduate School of Informatics and Engineering University of Electro-Communications Tokyo Japan French Civil Aviation Institute Toulouse France

ISBN: (纸本)9781479973989

This paper studies dynamic behavior of a quadrotor in both simulation and experiment when tracking desired attitude angles. The flight attitude control implemented in this research is designed based on a feedback control with an inner-loop structure as in the Aeroquad project. The feedback control configuration is applied to the dynamic model of a DIY qaudrotor UAV to simulate its attitude tracking behavior when tuning the PID gains based on a heuristic approach. The well-tuned PID controller is therefore applied to the experiment to validate the desired tracking response.

关键词： Attitude control Rotors Aerospace electronics DC motors Mathematical model Hardware Aerodynamics

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Performance Evaluation for Cooperative ADF Relaying V2I Communications with Burst transmission and PSA-CE schemes Over Quasi-Static Rayleigh Fading channels

Performance Evaluation for Cooperative ADF Relaying V2I Comm...

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17th International IEEE Conference on Intelligent Transportation systems & The Asia-Pacific Council on systems engineering Conference 2014

作者： Gilwon Seo Min Baek Chungha Bong Kyunbyoung Ko the ConvergenceInformation Technology Research Center for Next-Generation Intelligent Transport System (C-ITRC for NGITS) the Communication and Signal Processing Lab.(CSPL)the Department of IT ConvergenceKorea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea the Department of Control and Instrumentation Engineering Korea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea

In this paper,we propose the analytical approach for adaptive decode-and-forward(ADF) relaying vehicle-toinfrastructure(V2I) schemes consisting of ND-symbol burst data transmission based on pilot symbol assisted-channel estimation(PSA-CE) methods over quasi-static Rayleigh fading *** first,we focus on the error-event at relaying on board equipments(OBEs) for ND-symbol burst data transmission,whereas previous researches considered one data symbol transmission so that they showed the best performance *** considering ND-symbol burst for ADF relaying schemes,we derive an exact bit error rate(BER) expression which can be the performance of practical ***,the practical channel estimation(CE) process is considered by pilot symbols ***,we investigate the effects of both a CE error and an estimated noise variance,which can be obtained by pilot symbol assisted(PSA)-CE methods,on the received signal-to-noise ratio(SNR) and ***,the average BER is derived in approximated closed-form expression for an arbitrary link *** derived analytical approach is verified based on the number of relaying OBEs,pilots,and data *** accuracy is confirmed by comparison with simulation results.

关键词： SNR Performance Evaluation for Cooperative ADF Relaying V2I Communications with Burst transmission and PSA-CE schemes Over Quasi-Static Rayleigh Fading channels Rayleigh ADF

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Performance Analysis of Cooperative HADF Relaying V2I Communication systems for ND-symbol Burst Transmission using PSA-CE methods Over Quasi-Static Rayleigh Fading channels

Performance Analysis of Cooperative HADF Relaying V2I Commun...

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17th International IEEE Conference on Intelligent Transportation systems & The Asia-Pacific Council on systems engineering Conference 2014

作者： Min Baek Gilwon Seo Chungha Bong Kyunbyoung Ko the Convergence-Information Technology Research Center for Next-Generation Intelligent Transport System (C-ITRC for NGITS) the Communication and Signal Processing Lab.(CSPL)the Department of IT ConvergenceKorea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea the Department of Control and Instrumentation Engineering Korea National University of Transportation50 Daehak-roChungju-siChungbuk380-702 Korea

In this paper,we derive the average symbol error rate(SER) for the ND-symbol burst hybrid adaptive decodeor-amplify-forward(HADF) relaying vehicle-to-infrastructure(V2I) communication systems over quasi-static independent and non-identical distributed(INID) Rayleigh fading *** proposed analytical approach includes channel estimation(CE)errors generated by practical pilot symbol assisted-CE(PSACE) ***,based on the error-events at relaying on board equipments(OBEs) for ND-symbol burst data transmission,the conditional SER expression has been derived as an exact ***,the approximated average SER(ASER)expressions are presented as the closed-forms and their accuracy is confirmed by the comparison with simulation ***,we can conclude that our analytical expressions are tractable forms,and can be used as a tool to verify effects of an erroneous detection and hybrid transmission at each relaying OBE on the combined signal-to-noise ratio(SNR) and ASER for cooperative HADF relaying communication systems.

关键词： SNR ADF Performance Analysis of Cooperative HADF Relaying V2I Communication systems for ND-symbol Burst Transmission using PSA-CE methods Over Quasi-Static Rayleigh Fading channels Rayleigh

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Training software for esophageal speech developed on game-based PC

Training software for esophageal speech developed on game-ba...

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7th International Convention on Rehabilitation engineering and Assistive Technology, i-CREATe 2013, in Conjunction with SENDEX 2013

作者： Kuekittiwong, Wimok Boonpramuk, Panuthat Manochiopinig, Sriwimon Dept. of Control System and Instrumentation Engineering King Mongkut's University of Technology Thoburi 126 Prachautid Rd. Bangmod Tungkru Bangkok 10140 Thailand Dept. of Rehabilitation Medicine Faculty of Medicine Siriraj Hospital Mahidol University 2 Prannok Rd. Bangkoknoi Bangkok 10700 Thailand

Almost all people who get laryngeal cancer are treated by laryngectomy. However, this treatment affects their voice since the larynx will be removed. This research presents a technique which can recover their voice to communicate with others again. The technique is esophageal speech;this technique does not require any additional device but it needs only a continuously training from speech therapist. In additional, the training software for esophageal speech is designed and developed based on three speech characteristics which are tempo, loudness and duration of speech. For more attractive, we developed into computer game-based. The experiment is divided by two groups of users;normal speakers and esophageal speakers. The results of experiments are evaluated by using Mean Opinion Score, and the score are 4 from esophageal speakers and 3.7 from normal speakers.

关键词： Speech

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Improvement of warning lag time in forward collision warning systems based on multifunctional warnings

Improvement of warning lag time in forward collision warning...

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2012 IEEE International Conference on Vehicular Electronics and Safety, ICVES 2012

作者： Thammakaroon, Peachanika Tangamchit, Poj Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand

ISBN: (纸本)9781467309929

We present an improvement of forward collision warning (FCW) by adding more layers of warning functionality based on five stages of crash timeline. Generally, FCW operates at stage 3, the critical moment before crash. The added functionality is the location-based warning (LW) which warns the driver when driving toward a dangerous spot with high speed. LW operates at stage 2, an open condition to crash which comes from bad driving habit. We propose the use of warning lag time as a performance indicator, which is appropriate for real driving experiment. The warning lag time is defined as the time period between the issue of warning and the execution of brake by a normal driver. We performed real driving experiments with normal drivers and compare their brake actions with warnings from our system. The system with FCW alone achieved an average time lag of 1.47 sec., while the system with both FCW+LW can warn the driver faster with average time lag of 1.32 sec. The accuracy of both systems was about the same at 79%. © 2012 IEEE.

关键词： Brakes

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Approaches at KAIST NICIE Lab to quantifying situation awareness in nuclear power plant MCRs

Approaches at KAIST NICIE Lab to quantifying situation aware...

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作者： SEONG Poong-Hyun YIM Ho-Bin KIM Man-Cheol HA Jun-Su LEE Hyun-Chul LEE Seung-Woo Department of Nuclear and Quantum Engineering Korea Advanced Institute of Science and Technology School of Energy System Engineering Chung-Ang University Nuclear Engineering (Abu Dhabi Campus) Khalifa University of ScienceTechnology & Research (KUSTAR) Instrumentation & Control/Human Factors Division Korea Atomic Energy Research Institute Risk Assessment Department Korea Institute of Nuclear Safety

Situation awareness(SA) continues to receive a considerable amount of attention from the ergonomics community. But, techniques to measure SA have normally used expert judgment or a self-rating method so far. One of the problems of these techniques is inconsistency of results. So, empirical and analytical studies on an objective and quantitative SA measurement methods have been carried out at Nuclear I&C and Information engineering Lab(NICIE Lab) in Korea Advanced Institute of Science and Technology(KAIST). Empirical studies are based on physical and cognitive human behaviors, whereas analytical studies are mainly based on Bayesian inference. Eye movement signals and verbal protocol analysis were used for empirical approaches to obtain objective measures. FIR and SAE measures showed feasibility of an eye-tracking method for robust application. TSA score based on a verbal protocol analysis also showed its possibility of team SA(TSA) quantification. Bayesian inference was used for analytical approaches of SA quantification. The analytical quantification method was further expanded to consider some of the important human properties, and a SA modelling tool called ‘Co RSAGE, ver01" was developed.

关键词： situation awareness quantification empirical approach analytical approach

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Optimized Design of Modified Proportional-Resonant controller for Current control of Active Filters

Optimized Design of Modified Proportional-Resonant Controlle...

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IEEE International Conference on Industrial Technology

作者： Wanchak Lenwari Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi(KMUTT) 126 Prachauthid Rd Bangmod Tungkru Bangkok Thailand

ISBN: (纸本)9781467345675

With the recent advances in power electronic technology, the increase of non-linear loads such as power converters has deteriorated power quality and sparked the research in power quality issue. Shunt Active filter(SAF) is a power electronic device developed to improve power quality. Proportional-resonant(PR) type controller appears to be appropriate for the control system in active filters, where the precise tracking performance of harmonic currents is required. However, due to the complexity of the controller structure, to obtain suitable controller parameters, it requires considerable design effort in particular for a non-expert. This paper presents an automated design procedure to optimize a modified proportional-multiple resonant controller for the compensation of all main order harmonics, the 5th,7th,11th,13th,17th and 19th harmonics. The principle of the proposed control method and the optimization procedure based on genetic algorithms are described in detail The excellent control performance has been carried out by simulations.

关键词： optimization modified proportional-resonant controller shunt active filters current control active filters Current control Optimal design Power quality controllers Optimization Procedure design effort control Methods current harmonics visual tracking control systems power conversion unit design process

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An operational algorithm for satellite attitude determination from GPS carrier phase

An operational algorithm for satellite attitude determinatio...

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2012 9th International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2012

作者： Tatiyaworanun, C. Purivigraipong, S. Department of Control and Instrumentation and Mechatronics Engineering Mahanakorn University of Technology Bangkok Thailand Centre for Electronic System Design and Signal Processing Department of Electronic Engineering Mahanakorn University of Technology Bangkok Thailand

ISBN: (纸本)9781467320245

This paper presents an operational approach for determining satellite attitude from carrier phase GPS (Global Positioning system) measurements. A conventional recursive least square (RLS) estimator was implemented without requiring spacecraft dynamics. The proposed approach can be applicable for general space missions, particularly for real-time operation onboard-spacecraft. The attitude angles and electrical path difference (line bias) between antenna chains caused an offset error in GPS observables, can be estimated. The implemented estimator was tested with a simulated data, and the flight data collected onboard a mini-satellite orbiting in low Earth orbit. © 2012 IEEE.

关键词： Global positioning system

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