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IEEE GCC Conference & Exhibition

作者： Ondrej Krejcar Petr Konarik Faculty of Electrical Engineering and Computer Science Department of Measurement and Control Centre of Applied Cybernetics VSB-Technical University of Ostrava Ostrava Poruba Czech Republic Faculty of Mechanical Engineering Department of Control System and Instrumentation VSB-Technical University of Ostrava Ostrava Poruba Czech Republic

Paper shows direct connection and implementation way of designed control schémas of prepared applications to an industrial WinPLC. Paper deals with industrial realization of feedback control of demanding applications on their control, control algorithms and visualization together with design, implementation and real time control from MATLAB/Simulink Environment. Described is a way to produce a permanent solution in control applications that are fully prepared, designed and implemented directly from MATLAB/Simulink to the target control platform. As a part, the mentioned solution is using a multiplatform control system REX as a bridge between MATLAB and target platforms. These methods allow minimizing costs of development of control of applications, because it produces target permanent realizations in comparison to classical development methods that usually need expensive real time measurement cards and produce only one purpose development solution. As next benefit the application is created for visualization the data from RT database during the measurement and control process. This last benefit produce an interesting data from real control process to give a next reason to use of WinCon solution.

关键词： MATLAB Libraries control systems Process control Real time systems Algorithm design and analysis Servers

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WinPLC control from MATLAB/Simulink Environment throw the Multiplatform control system REX by Secured Wireless Network

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IFAC Proceedings Volumes 2009年第1期42卷 13-16页

作者： Ondrej Krejcar Petr Konarik Tutsch Michal VSB-Technical University of Ostrava Faculty of Electrical Engineering and Computer Science Department of Measurement and Control Centre for Applied Cybernetics 17. listopadu 15 708 33 Ostrava- Poruba VSB-Technical University of Ostrava Faculty of Mechanical Engineering Department of Control System and Instrumentation 17. listopadu 15 708 33 Ostrava- Poruba

Paper deals with industrial realization of feedback control of demanding applications on their control, control algorithms and visualization together with design, implementation and real time control from MATLAB/Simulink Environment. Paper shows direct connection and implementation way of designed control schemas of prepared applications to an industrial WinPLC. Described is a way to produce a permanent solution in control applications that are fully prepared, designed and implemented directly from MATLAB/Simulink to the target control platform. As a part, the mentioned solution is using a multiplatform control system REX as a bridge between MATLAB and target platforms. These methods allow minimizing costs of development of control of applications, because it produces target permanent realizations in comparison to classical development methods that usually need expensive real time measurement cards and produce only one purpose development solution.

关键词： WinPLC Matlab Simulink control system REX control Real Time

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A study on the dynamic SOC compensation of an ultracapacitor module for the hybrid energy storage system

A study on the dynamic SOC compensation of an ultracapacitor...

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International Conference on Telecommunications Energy (INTELEC)

作者： Hyun-Sik Song Jin-Beom Jung Baek-Haeng-Lee Dong-Hyun Shin Byoung-Hoon Kim Yu-Cheol Park Hoon-Heo Hee-Jun Kim Department of Control and Instrumentation Engineering Korea University South Korea Electronic System Research and Development Center Korea Automotive Technology Institute South Korea Katech Cheonan KR Hanyang University Seongdong-gu Seoul KR

ISBN: (纸本)9781424424900

There have been a number of methods proposed for accurate state of charge (SOC) estimation of a battery as an important role of the battery management system (BMS). However, adequate test data of batteries and BMS development costs must be taken into consideration before application in actual vehicles. In addition, different algorithms need to be adopted according to the type of energy storage device and system configuration. For a mild-HEV hybrid energy storage device that uses the ultracapacitor module and the VRLA battery, the small capacitance of ultracapacitor module makes accurate SOC difficult. Accordingly, this paper introduces a dynamic SOC estimation algorithm capable of SOC compensation of the ultracapacitor module even when there is current input and output. A cycle profile that simulates the operating conditions of a mild-HEV was applied to a vehicle simulator to verify the effectiveness of the proposed algorithm based on testing.

关键词： Supercapacitors Energy storage Vehicle dynamics Testing State estimation Battery management systems Costs Battery powered vehicles Capacitance Heuristic algorithms

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Optimal Design of Reactive Power PI Regulator for Hydro Power Plants

Optimal Design of Reactive Power PI Regulator for Hydro Powe...

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IEEE International Conference on control Applications

作者： Robert, Gerard Hurtado, Dominique Control System EDF Hydro Engineering Centre France Instrumentation and Control Department EDF National Nuclear Equipments Centre France

ISBN: (纸本)9781424422227

This paper presents an optimal PI controller for Automatic reactive power Regulators (AQR) which equip some French hydro power plants. The developed AQR algorithm participates to secondary voltage control following some control performance criteria required by the Transmission system Operator. controller parameters are calculated by solving a constrained nonlinear optimization that maximizes the robustness of the feedback control while incorporating the control performance specifications. That involves a 'worst case' design approach which takes into account modeling uncertainties and gain variations in the operating domain. Moreover a mere anti-windup strategy has been achieved in the AQR algorithm. Referring to Matlab simulations and measurements carried out on a 110 MVA pilot hydro unit, results are complying with demands.

关键词： Reactive power

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The advantages and disadvantages of kalman filtering in iterative learning control

The advantages and disadvantages of kalman filtering in iter...

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18th Annual Space Flight Mechanics Meeting

作者： Panomruttanarug, Benjamas Longman, Richard W. Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Mechanical Engineering Civil Engineering and Engineering Mechanics Columbia University New York NY 10027 United States

ISBN: (纸本)9780877035442

Iterative learning control (ILC) can eliminate deterministic tracking errors of a control system that repeatedly performs the same tracking maneuver. It iterates with the real world rather than with a model aiming to achieve this zero error, and hence it can achieve lower final error levels in the real world than one could obtain when limiting oneself to using a mathematical model aiming to achieve zero tracking error. There are spacecraft applications when fine pointing sensors perform repeated scans. When there is substantial plant and measurement noise, it is natural to consider using a Kalman filter to improve the signal used by the learning control law. In a separate work, this was analyzed for the sister field of repetitive control (RC). It was observed that when the model in the Kalman filter is imperfect, the use of a Kalman filter can make the final error levels worse rather than better, and care must be taken to assess the benefit in reduced random variations compared to the deterministic error introduced. This is also the case when there are unmodeled repeating external disturbances. Here we show that the same situation applies to ILC if one uses a Kalman filter running in time steps during each iteration. But one can reformulate the Kalman filter to operate in the repetition or iteration domain, and when this is done, one can still converge to zero expected value of the tracking error in the presence of model errors and external repeating disturbances.

关键词： Kalman filters

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Adaptive brake warning system for automobiles

Adaptive brake warning system for automobiles

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International Conference on ITS Telecommunications (ITST)

作者： P. Thammakaroon P. Tangamchit Department of Control System and Instrumentation Engineering King Mongkut''s University of Technology Thailand

We present an adaptive brake warning system in order to help a driver keep a safe distance from the cars in front to avoid rear-end collisions. The safe distance continuously varies according to the carpsilas velocity, driving events, and road conditions. Three sensors, an ECU reader, a camera, and a laser range finder, are used to collect the vehicular velocity, the density of cars on the road and the following distance respectively. These data are sent to a main computer to calculate the level of critical situation where the driver needs to apply brake ranging from 0 to 4 where level 0 is the safest and level 4 means the most dangerous. Two decision algorithms: adaptive threshold and fuzzy inference system are compared. The results from real driving situations indicated that both methods can achieve an accuracy of 76.98% and 65.46% respectively.

关键词： Adaptive systems Alarm systems Automobiles Roads Cameras Vehicles Collision avoidance Programmable control Adaptive control Accidents

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Cooperative behavior-based control of decentralized mobile robots on an overhead box carrying task

Cooperative behavior-based control of decentralized mobile r...

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

作者： Mahitthidetch Udomkun Poj Tangamchit Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Bangkok Thailand

We demonstrated that the regular behavior-based architecture can be used to control decentralized multiple robots on a tightly-coupled task. With carefully designed behaviors, the robots can work cooperatively and effectively. We divided the behaviors into two types: individual behaviors and group behaviors. Group behaviors, embedded as layers in the behavior-based architecture, act as a mechanism to induced coordination and synchronization among robots. The tightly-coupled task that we use as our testbed is the cooperative overhead transportation of a box, in which two robots have to carry a box over their tops. Little movement error will result in a fall of the box. The result illustrated the validity of the proposed method. The robots can move the box to a goal without falling down with a success rate of 80%.

关键词： Robots Robot kinematics Mobile robots Robot sensing systems Synchronization Transportation Distributed control

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Cooperative Overhead Transportation of a Box by Decentralized Mobile Robots

Cooperative Overhead Transportation of a Box by Decentralize...

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IEEE Conference on Robotics, Automation and Mechatronics

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

We demonstrated that the regular behavior-based architecture can be used to control decentralized multiple robots on a tightly-coupled task. With carefully designed behaviors, the robots can work cooperatively and effectively. We divided the behaviors into two types: individual behaviors and group behaviors. Group behaviors, embedded as layers in the behavior-based architecture, act as a mechanism to induce coordination and synchronization among robots. The tightly-coupled task that we use as our testbed is the cooperative overhead transportation of a box, in which two robots have to carry a box over their tops. Little movement error will result in a fall of the box. The result illustrated the validity of the proposed method. The robots can move the box to a goal without falling down with a success rate of 80%.

关键词： Transportation Mobile robots Robot kinematics Distributed control control systems Centralized control Robot control Instruments systems engineering and theory Testing

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A Single-Phase Grid-Connected Inverter Using a Boost Two-Cell Switching Converter with Maximum Power Point Tracking Algorithm

A Single-Phase Grid-Connected Inverter Using a Boost Two-Cel...

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5th International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2008), vol.2

作者： Kamon Tabaiya Wanchak Lenwari Cherdchai Prapanavarat Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Bangkok Thailand Department of Electrical Engineering King Mongkut's University of Technology Bangkok Thailand

This paper proposes a single-phase grid-connected inverter for Photovoltaic (PV) systems using a Boost Two-Cell Switching (BTCS) converter based on a Maximum Power Point Tracking (MPPT) technique. Due to nonlinear I-V characteristic of PV cells, the system must include an algorithm to obtain the maximum power from PV cells at any atmospheric condition. The method used in this paper is the incremental conductance (INC) algorithm. The BTCS converter is selected as a power stage with the two-cell semiconductor switching devices controlled to obtain a maximum power from PV cells. The H-bridge inverter provides a sinusoidal current and synchronizes with the grid voltage. The control of the inverter is based on ramp comparison control with constant switching frequency and zero crossing voltage detectors. The experimental results in a test lab showed the effectiveness of the proposed PV system in both constant and rapidly changing in atmospheric conditions.

关键词： Boost two-cell switching converter Maximum power point tracking Grid-connected inverter

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Automatic Ruler Scale Calibration using a Rotary Machine

Automatic Ruler Scale Calibration using a Rotary Machine

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5th International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2008), vol.2

作者： Suricha Kraiprawes Anusorn Tonmueanwai Poj Tangamchit Department of Control System and Instrumentation Engineering Faculty of Engineering King Mongkut's University of Technology Bangkok Thailand National Institute of Metrology Thailand Pathum Thani Thailand

We combined a rotary machine with a reflecting optical sensor to built a machine that automatically calibrate ruler scales. The optical sensor is mounted on a linear motion rail along the ruler scales It identifies the marked lines on a metal ruler by detecting reflecting light intensity from the lines. Our system then finds distances between lines and counts the number of lines. The measured results were compared with the a reference length obtaining from an encoder of a precise stepping motor to measure the precision of the ruler scale. From the experiment results, the machine is shown to be capable of standard rulers grade 2 calibration. Lastly, the measurement uncertainty of the machine was analyzed.

关键词： Optical sensor Uncertainty

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