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Adaptive control method for core power control in TRIGA Mark II reactor

IOP Conference Series: Materials Science and engineering 2018年第1期298卷

作者： Mohd Sabri Minhat Hazlina Selamat Nurul Adilla Mohd Subha Reactor Electronic Instrumentation and Control Section Reactor Technology Centre Malaysian Nuclear Agency 43000 Kajang Malaysia Control and Mechatronics Engineering Department Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Malaysia

The 1MWth Reactor TRIGA PUSPATI (RTP) Mark II type has undergone more than 35 years of operation. The existing core power control uses feedback control algorithm (FCA). It is challenging to keep the core power stable at the desired value within acceptable error bands to meet the safety demand of RTP due to the sensitivity of nuclear research reactor operation. Currently, the system is not satisfied with power tracking performance and can be improved. Therefore, a new design core power control is very important to improve the current performance in tracking and regulate reactor power by control the movement of control rods. In this paper, the adaptive controller and focus on Model Reference Adaptive control (MRAC) and Self-Tuning control (STC) were applied to the control of the core power. The model for core power control was based on mathematical models of the reactor core, adaptive controller model, and control rods selection programming. The mathematical models of the reactor core were based on point kinetics model, thermal hydraulic models, and reactivity models. The adaptive control model was presented using Lyapunov method to ensure stable close loop system and STC Generalised Minimum Variance (GMV) controller was not necessary to know the exact plant transfer function in designing the core power control. The performance between proposed adaptive control and FCA will be compared via computer simulation and analysed the simulation results manifest the effectiveness and the good performance of the proposed control method for core power control.

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Estimating structural deformations for inferential control: a disturbance observer approach

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IFAC-PapersOnLine 2016年第21期49卷 642-648页

作者： Voorhoeve, Robbert Dirkx, Nic Melief, Teun Aangenent, Wouter Oomen, Tom Eindhoven University of Technology Department of Mechanical Engineering Control Systems Technology Eindhoven Netherlands ASML Research Mechatronics Veldhoven Netherlands Nobleo Technology Eindhoven Netherlands

Increasingly stringent requirements for motion systems lead to a situation where the positioning performance can often not be measured directly and therefore has to be estimated. A typical example is a wafer stage, where the performance is desired at the point-of-exposure on the wafer but the sensors are located at the edge of the wafer stage. Increasingly stringent performance requirements necessitate taking structural deformations, caused by actuation or disturbance forces, into account. The aim of this paper is to develop a disturbance observer approach including an observer relevant model identification approach and to experimentally validate this approach on a prototype motion system. The experimental results confirm that the proposed disturbance observer approach leads to an improved estimation of the unmeasured performance variables. © 2016

关键词： Deformation Disturbance observer Inferential control Model identification Performance requirements Performance variables Positioning performance Stringent requirement Structural deformation

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Developing nanostructured, cadmium doped zinc oxide methanol sensor

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Materials Today: Proceedings 2017年第9期4卷 9631-9634页

作者： Kapil Sadani Rajib Bandyopadhyay Pooja Nag Dept. of Instrumentation and Control MIT Manipal Udupi 576104 India Department of Instrumentation and Electronics Engineering Jadavpur University India Dept. of Mechatronics MIT Manipal Udupi 576104 India

Cadmium doped zinc oxide nanoparticles have been synthesized by chemical combustion of acetates of metals, nitric acid and di/triethanolamine. Thick film screen-printed sensors have been fabricated using the nano-powders. The sensor exhibits fastest response time for detection of methanol in comparison to reported metal oxide alcohol sensors when doped with 2 atomic percent Cadmium at 3000C. The Doped ZnO phases were characterized by XRD, FESEM and EDS. It was found to exist as a hexagonal system in a primitive lattice with average crystallite size of around 25 nm, bandgap of 2.7 eV and grain size less than 100 nm. The sensors were found to be selectively sensitive to 20-300ppm of methanol vapours with a response and recovery times of 4- 9 seconds and 5-10 seconds respectively.

关键词： Methanol sensor Zinc oxide nanoparticle

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Development of the vibration analysis and suppression technology for laser galvanometers based on inertial sensing technology

Development of the vibration analysis and suppression techno...

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SICE International Symposium on control Systems (ISCS)

作者： Wen-Chuan Chen Yu-Liang Hsu Po-Huan Chou Hsin-Hung Lee Hsing-Cheng Chang Shih-Chin Yang Chin-Sheng Chen Department of Automatic Control Engineering Feng Chia University Taichung Taiwan Institute of Automation Technology National Taipei University of Technology Taipei Taiwan Mechatronics Control Department Industrial Technology Research Institute Hsinchu Taiwan Department of Mechanical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9781509056149

This paper presents an inertial-sensing-based vibration analysis and suppression system for laser galvanometers. The functions of this system are to measure the vibrations during rotation motions of galvanometers and to design a comb filter for restraining the vibrations of the galvanometers effectively. The proposed system is composed of an intelligent motion control platform, a servo driver circuit, a galvanometer driver module, a galvanometer, and a MEMS piezoelectric accelerometer. The proposed system can measure the vibration signals generated by the galvanometer using the piezoelectric accelerometer and utilize the fast Fourier transformation (FFT) to analyze the vibration frequencies. Subsequently, a digital comb filter is designed to restrain the vibrations of the galvanometer based on the obtained vibration frequencies. Finally, the experimental results have successfully validated that the proposed inertial-sensing-based vibration analysis and suppression system, and the designed comb filter can measure, analyze, and restrain the vibrations of the galvanometer effectively and further improve the accuracy and stability of the laser galvanometer scanning system.

关键词： Vibrations Frequency measurement Resonant frequency Vibration measurement Mirrors Accelerometers Torque

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Forecasting of global solar radiation using anfis and armax techniques

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IOP Conference Series: Materials Science and engineering 2018年第1期303卷

作者： Auwal Muhammad M. S. Gaya Rakiya Aliyu Rabi'u Aliyu Abdulkadir Ibrahim Dauda Umar Lukuman Aminu Yusuf Mudassir Umar Ali M.T.M Khairi Department of Physics Kano University of Science and Technology Wudil Nigeria Department of Electrical Engineering Kano University of Science and Technology Wudil Nigeria Department of Electrical Engineering Bayero University Kano Nigeria Deparment of Control & Mechatronics Universiti Teknologi Malaysia Malaysia

Procurement of measuring device, maintenance cost coupled with calibration of the instrument contributed to the difficulty in forecasting of global solar radiation in underdeveloped countries. Most of the available regressional and mathematical models do not capture well the behavior of the global solar radiation. This paper presents the comparison of Adaptive Neuro Fuzzy Inference System (ANFIS) and Autoregressive Moving Average with eXogenous term (ARMAX) in forecasting global solar radiation. Full-Scale (experimental) data of Nigerian metrological agency, Sultan Abubakar III international airport Sokoto was used to validate the models. The simulation results demonstrated that the ANFIS model having achieved MAPE of 5.34% outperformed the ARMAX model. The ANFIS could be a valuable tool for forecasting the global solar radiation.

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Comparison of black-grey-white box approach in system identification of a flight vehicle

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Journal of Physics: Conference Series 2018年第1期1130卷

作者： L Nugroho R Akmeliawati Guidance Navigation & Control Rocket Technology Center / PustekroketLAPAN Rumpin Bogor Indonesia Department of Mechatronics Engineering International Islamic University of Malaysia53100 Kuala Lumpur Malaysia

Developing an autonomous flight control system for a fixed-wing unmanned aerial vehicle (UAV) requires the mathematical representation of the system dynamics which can be obtained through system identification, such as using white, grey or black box methods. In this paper, three system identification methods; white method modeling using Cook formulas which is used analytically to develop the linear-time-invariant model structure with the aerodynamic coefficients of the UAV extracted from Missile DATCOM computations at certain flight conditions, and two empirical mathematical models constructed from non-linear flight simulator defined as the Greyification of Black Box Model (B2G) and Direct Grey to White Linkage (G2W). The comparison shows that both empirical methods prove to be very instrumental to contrast and produce higher sense of engineering than the analytical one

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Towards an intelligent reconfigurable BLDC motor controller: Commutation configuration and parameters detection

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AIP Conference Proceedings 2019年第1期2187卷

作者： Agus Mukhlisin Estiko Rijanto I. Nyoman Sutantra Muhammad Nur Yuniarto Agus Sigit Pramono 1Sepuluh Nopember Institute of Technology Department of Mechanical Engineering Surabaya Indonesia 2Research Center for Electrical Power and Mechatronics Indonesian Institute of Sciences LIPI Indonesia 3Design Laboratory Mechanical Eng. Dept. Institut Teknologi Sepuluh Nopember Surabaya Indonesia 4Sepuluh Nopember Institute of Technology Center of Automotive Control System IPTEK Surabaya Indonesia

One of the key components in an electric vehicle is brushless direct current (BLDC) motor controller. At present, it is difficult to match a self-made motor controller with several different BLDC motors available in the global market. One of the reasons is that the Hall sensors’ configuration is not well informed. Another reason is the motor parameter’s values used in the controller are not well suited with the real physical conditions of the motor. This study aims to design an intelligent reconfigurable BLDC motor controller. In this paper, a method for automatic commutation configuration and automatic parameter values detection is presented. The Hall sensors and motor phases configurations are identified. The BLDC motor parameter values are detected automatically using mathematical models. Those parameters include internal resistance, inductance, coefficient of back electromotive force (BEMF), torque coefficient, friction coefficient, and moment of inertia. Experimental results of the automatic commutation configuration and parameter values detection are presented. Those results were used to develop a current controller. Further experimental results indicated that the method could be implemented in a BLDC motor current controller.

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Modelling and simulation of MEMS electromagnetic scanner control

Modelling and simulation of MEMS electromagnetic scanner con...

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International Conference on Mechanical, System and control engineering (ICMSC)

作者： Dumitru Sergiu Comeaga Daniel Constantin Anghel Morega Alexandru Mihail Electronic Equipment for Measurement & Control Lab. National Institute for R&D in Mechatronics Bucharest Romania Mechatronics and Precision Engineering Department University Politehnica of Bucharest Bucharest Romania Laboratory for Processing MEMS National Institute for R&D in Electrical Engineering Bucharest Romania Machines Materials and Electric Devices Department University Politehnica of Bucharest Bucharest Romania

ISBN: (纸本)9781509065318

The article presents the design, modelling and simulation of an electronic control solution for a MEMS electromagnetic scanning system. The electromechanical design is presented and completed with a mathematical model, and a simulation based on Comsol. The simulations allow to extract the equivalent circuit parameters of the actuator which in turn are used to integrate the equivalent circuit with the electronic circuit and simulate in PSPICE. The behavior of the overall circuit is simulated allowing to optimally design the electronic circuit. Current sources with Howland topology made with operational amplifiers are often used for electromagnetically actuators if that requires constant current polarization. Theoretical determination of overall performances for these circuits is generally known. This paper presents a PSPICE simulation for the mains performance of the constant current circuit used for actuators driving.

关键词： Actuators Solid modeling Numerical models Mathematical model Electromagnetics Integrated circuit modeling Magnetomechanical effects

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The effects of parameter variation in open-loop and closed-loop control scheme for an electro-hydraulic actuator system

International Journal of Control and Automation

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International Journal of control and Automation 2016年第11期9卷 283-294页

作者： Soon, C.C. Ghazali, R. Jaafar, H.I. Hussien, S.Y.S. Sam, Y.M. Rahmat, M.F. Centre for Robotics and Industrial Automation Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Durian Tunggal Hang Tuah Jaya Melaka76100 Malaysia Department of Control and Mechatronics Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Johor81310 Malaysia

It is well known that the electro-hydraulic actuator (EHA) system is exposed to the disturbances, uncertainties, and parameter variations which are caused by the changes in operating conditions for instance, total moving mass, supply pressure, servo-valve gain, bulk modulus, leakage coefficient, and friction. These problems pose to a great challenge in modelling and controller development for an EHA system. Degradation of the desired performance can be imposed if an improper control strategy is utilized. This paper discusses the fundamental study on the significant effect that leads to degradation of EHA system performance due to variation in the system parameters. A nonlinear EHA system model is developed and implemented in the simulation studies in open-loop and closed-loop control configuration. The finding shows that the servo-valve gain resulted the most influential parameters to the EHA system performance as compared to the total moving mass and supply pressure parameters. In order to overcome these issues, the utilized controller should be robust enough to overcome the entire operating range that against such disturbances, uncertainties, and parameter variations. Therefore, a nonlinear and the intelligent control approach may be necessary to be designed in order to overcome these difficulties. © 2016 SERSC.

关键词： Closed loop control systems

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Expression of Concern: Application and economic viability of wind turbine installation in Lutak, Iran

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Environmental Earth Sciences 2018年第1期78卷 1-1页

作者： Kasra Mohammadi Ali Mostafaeipour Ahmad Sedaghat Shahaboddin Shamshirband Dalibor Petković Department of Mechanical and Industrial Engineering University of Massachusetts Amherst USA Industrial Engineering Department Yazd University Yazd Iran Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran Department of Computer System and Technology Faculty of Computer Science and Information Technology University of Malaya Kuala Lumpur Malaysia Department for Mechatronics and Control Faculty of Mechanical Engineering University of Niš Nis Serbia

The Editors-in-Chief of Environmental Earth Sciences are issuing an editorial expression of concern to alert readers that this article [1] shows substantial indication of irregularities in authorship during the submis...

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