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17th International Conference on control, Automation and systems, ICCAS 2017

作者： Somkane, Pongsakorn Kongratana, V. Gulpanich, S. Tipsuwanporn, V. Wongvanich, N. Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand

ISBN: (纸本)9788993215137

This work presents a cascade control architecture to combat network induced delays in Wireless network controlled systems. Specifically a flow-level cascade control system is considered whereby the primary process variable is liquid level, and the secondary process variable is the flow rate. The flow-level process variables are measured by Wireless HART differential Pressure (DP) transmitter and sent through a WirelessHART gateway. control actions are provided by a control valve actuator which is manipulated through a PLC. The PLC and the WirelessHART gateway are managed by an OPC server providing a medium of communication. The PID controller gains are designed through the LabView software, in which the network induced delays is offset by adjusting the controller interval until the responses are satisfactory. Results show that cascade control outperformed the single loop control, in both handling network induced delays and coping with disturbances. © 2017 Institute of control, Robotics and systems - ICROS.

关键词： Transmitters

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The Simulation of Wave Energy Conversion by Floating Point Absorber Buoy in Indonesian Sea Waves 7

The Simulation of Wave Energy Conversion by Floating Point A...

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7th International Conference on instrumentation, control, and Automation, ICA 2021

作者： Aji, Nurvita Ekawati, Estiyanti Haq, Irsyad Nashirul Institut Teknologi Bandung Faculty of Industrial Engineering Instrumentation and Control Department Bandung Indonesia

ISBN: (纸本)9781665432955

Referring to National Energy Policy or Government Regulation No. 79/2014, Indonesia has set out several plans to increase the New and Renewable Energy (NRE) share in the primary energy mix to 23% by 2025 and 31% by 2050. Ocean wave energy is one of the potential renewable energy sources. This study presents the simulation of ocean wave energy conversion of Indonesian sea waves, specifically along the west coast of Sumatra, the southern coasts of Java, and Bali waters. The Wave Energy Converter Simulator (WEC-Sim) simulated five hot spots of high wave energy using the floating-point absorber buoy RM3 model. These five hotspots are South Pagai Island II (101.25°E-4.25°S), Enggano Island (102.25°E-5.5°S), Cilacap (109.06°E-7.94°S), Jember (113.68°E-8.56°S), and Bali (115°E-8.75°S). RM3 is the third reference model of wave energy converter developed by The U.S. department of Energy (DOE), The National Renewable Energy Laboratory (NREL), and The Sandia National Laboratory (SNL). Meanwhile, the WEC-Sim software uses the Cummins equation in the 6 degrees of freedom (DOF) modeling process. In this simulation, the Pierson-Moskowitz (PM) spectrum was used to model irregular waves. The WEC's power take-off (PTO) mechanism was simulated as a hydraulic system where the hydraulic power absorbed depends on the differential pressure of the hydraulic piston and the piston area. This simulation used the rotary electrical generator with an energy conversion efficiency of 98% in electricity generation. According to the selected location, the simulation was running for 400 seconds of time simulation and 0.01 seconds of time step with the predefined parameters, such as significant wave height and wave period. The average value of electrical powers generated during the simulation were 15.85, 15.53, 18.13, 14.10, and 15.69 kilowatts (kW) while the total of accumulated electrical powers were 634, 621, 725, 564, and 627 megawattss (MW) for South Pagai Island II, Enggano Island, Cilacap, Jemb

关键词： Wave energy conversion

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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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LQR/PID controller design of PLC-based inverted pendulum

LQR/PID controller design of PLC-based inverted pendulum

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2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018

作者： Sirisantisamrid, Kaset Wongvanich, Napasool Gulpanich, Suphan Tammarugwattana, Narin Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut’s Institute of Technology Ladkrabang Bangkok Thailand

ISBN: (纸本)9789881404886

This paper presents an LQR based PID controller to control the inverted pendulum system. The control design employs a control zoning approach whereby the entire pendulum system is divided into two regions: a normal pendulum region and the inverted pendulum region where the system is approximately linear close to the upright position. The LQR architecture is used to obtain optimal gains for the PID controller. An algebraic approach is also presented for selection of Q and R matrices. Experimental implementations with a PLC based system show that the computed gains yield the most stable controlled responses compared to the gains chosen through trial and errors. © 2018 Newswood Limited. All rights reserved.

关键词： controllers

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Design and compensation of DC chopper for speed control in DC motor using PLL controller

Design and compensation of DC chopper for speed control in D...

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2013 52nd Annual Conference of the Society of Instrument and control Engineers of Japan, SICE 2013

作者： Phipek, K. Sompracha, C. Tipsuwanporn, V. Department of Instrumentation Engineering Faculty of Engineering Rajamangala University of Technology Rattanakosin Nakhon Pathom 73170 Thailand Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand

In this paper describes the speed output of DC motor. The DC motor is controlled by DC converter which is using the PLL controller. This proposed is designed and implemented the current output of the DC-DC chopper which fed to DC motor based on close-loop control. The close-loop control is obtained the small signal from the tachogenerator and encoder. The encoder is converted the small signal to similar PWM waveform feedback to PLL detector that is adjusted the PWM signal driven into DC chopper. In order control to applied high precision speed of DC motor.

关键词： controllers

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The speed control of induction motor using 11-level inverter

The speed control of induction motor using 11-level inverter

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6th IASTED Asian Conference on Power and Energy systems, AsiaPES 2013

作者： Tipsuwanporn, Vittaya Numsomran, Arjin Phipek, Kowit Khaengsarigid, Adisak Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand Department of Instrumentation Engineering Faculty of Engineering Rajamangala University of Technology Rattanakosin Nakhon Pathom 73170 Thailand

ISBN: (纸本)9780889869455

In this paper, control of the output voltage in 11-level inverter is presented. The inverter is controlled by using pulse width modulation (PWM) technique. A novel 11-inverter source fed induction motor drive with sinusoidal voltage and current waveform is proposed. Variable frequency inverters to high precision in order control the speed of induction motor. The current in the inverter source can be controlled as constant or vary the magnitude of inverter current reference. The propose is controlled speed and decreased total harmonic distortion (THD) of output in the inverter which it fed to induction motor with V/F control.

关键词： Induction motors

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Set Value Observer Performance improvement with optimizing the free parameter in the MTT Problem 36

Set Value Observer Performance improvement with optimizing t...

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第36届中国控制会议

作者： Mohammad Ali Alirezapouri Hamid Khaloozadeh Ahmad Reza Vali Mohammad Reza Arvan Department of Control Faculty of Electrical EngineeringMaleke-Ashtar University of technology Departments of System and Control Faculty of Electrical EngineeringK.N.Toosi University of Technology

ISBN: (纸本)9781538629185

Observers based on set value theory(SVO) have a good performance in the maneuvering target tracking(MTT) problem. By assuming system disturbances, are unknown but bounded(UBB) the SVO or UBB filters can be used in maneuvering target tracking(MTT) problems. In the UBB filter implementation, free parameters appeared when bounding ellipsoids are used. Inappropriate choice of these free parameters, reduce accuracy and caused filter instability. To solve these problems, two methods(recursive parameters calculation(RPC) and calculates the optimal free parameters(OPC)) will be developed. Free parameters that calculated with OPC method, improves the accuracy of maneuvering targets state estimation and avoid algorithms instability in the MTT problem. The results of numerical simulations, confirms improved the efficiency and accuracy of the UBBF filter by using OPC method for free parameters calculation.

关键词： Set value observer Maneuvering Target Tracking Free Parameters Optimal Filtering

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Bidirectional best first based autonomous parallel parking system

Bidirectional best first based autonomous parallel parking s...

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

作者： Vorashompoo, Amorn Panomruttanarug, Benjamas Higuchi, Kohji Faculty of Engineering Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand Department of Electronic Engineering University of Electro-Communications Tokyo 182-8585 Japan

ISBN: (纸本)9781457704246

One of the major difficulties with an autonomous reverse parallel parking is how to find a trajectory of travel from start to goal without any collision. In this paper, a bidirectional search is suggested to find the shortest pathway from an initial vertex to a goal vertex in a directed graph, implying that the initial and goal states must be known in advance. In each step for searching, there are three possible nodes generated from the configuration space (or C-space), that the algorithm must decide to traverse to based on a best first search algorithm. Giving a start and goal points, the designed path is obtained by simulation in MATLAB. The experimental results show an ability to perform a parking maneuver using the simulated path. © 2011 IEEE.

关键词： MATLAB

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Solid oxide fuel cell integrated with supercritical water fueled by methanol 6th

Solid oxide fuel cell integrated with supercritical water fu...

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6th International Conference on Advanced Materials Research, ICAMR 2016

作者： Srisiriwat, Anuchart Srisiriwat, Nawadee Department of Instrumentation and Control Engineering Faculty of Engineering Pathumwan Institute of Technology Bangkok10330 Thailand Department of Chemical Engineering Faculty of Engineering Pathumwan Institute of Technology Bangkok10330 Thailand

ISBN: (纸本)9783038356844

A solid oxide fuel cell (SOFC) is known as an interesting energy conversion device because of its fuel flexibility and high efficiency. The hydrogen-rich stream is used as fuel carrier converting to generate electrical energy. A non-stoichiometric thermodynamic model based on minimum free energy was performed to predict the amount of hydrogen production via the methanol reforming under supercritical water (SCW) condition. The effects of SCW reaction temperature and water-to-methanol molar ratio on the SOFC power generation integrated with SCW reforming from methanol were investigated. The hydrogen yield, the required heat duty for a feed preheater and a SCW reactor and the SOFC power generation increase with increasing the SCW reaction temperature and the amount of water fed in SCW reactor. Under operating parameters of SCW reformer based on 1 mole/sec of methanol fed at the high temperature of 1273 K and water-to-methanol molar ratio of 5, the SOFC electrical power of 246 kW was produced with the maximum fuel utilization of 0.7. © 2016 Trans Tech Publications, Switzerland.

关键词： Methanol

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Magnitude Optimum Design of PID control Loop with Delay

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IFAC-PapersOnLine 2015年第12期48卷 446-451页

作者： Fišer, Jaromír Zítek, Pavel Vyhlídal, Tomáš Department of Instrumentation and Control Engineering Czech Technical University in Prague Faculty of Mechanical Engineering Technická Str. 4 166 07 Czech Republic Czech Republic

The paper deals with a magnitude-optimum based synthesis of PID control loops with respect to the disturbance rejection. To obtain as general as possible formulation of the control synthesis the dimensional analysis is applied resulting in the use of similarity numbers of the so-called swingability and laggardness of the time delay plant. Just this approach has made it possible to work with the transcendental form of the optimized magnitude function. From the meromorphic description of the control loop with delay the PID setting then can be evaluated by means of Levenberg-Marquardt iteration method. The obtained PID settings are systematically compared from the viewpoint of the dominant modes of the control loop responses. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Disturbance rejection

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