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Online sensorless position estimation for switched reluctance motors using characteristics of overlap position based on inductance profile

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IET ELECTRIC POWER APPLICATIONS 2019年第4期13卷 456-462页

作者： Kim, Jae-Hoon Kim, Rae-Young Hanyang Univ Dept Elect & Biomed Engn Seoul South Korea

This study proposes an online sensorless position estimation method using switched reluctance motor (SRM) characteristics of overlapped position. The SRM drive system operation requires rotor position information of the motor to apply or commutate the current flowing in each phase winding. Conventional position sensorless control methods have some limitations due to complicated calculations, large memory space requirements dependency on lookup tables, and drive limitations for specific motors. To overcome these limitations, the proposed method uses the characteristics of the overlapping position of the SRM to estimate the rotor position information and hybrid sensorless control by varying the control method according to the operating section. The proposed sensorless position estimation method is verified experimentally using a 400W 4/2 SRM.

关键词： position control sensorless machine control reluctance motor drives rotors inductance table lookup control engineering computing overlap position online sensorless position estimation method switched reluctance motor characteristics SRM drive system operation rotor position information control method memory space requirements dependency hybrid sensorless control inductance profile current flow phase winding lookup tables

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Review on system development in eddy current testing and technique for defect classification and characterization

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IET CIRCUITS DEVICES & SYSTEMS 2017年第4期11卷 338-351页

作者： Bin Ali, Kharudin Abdalla, Ahmed N. Rifai, Damhuji Faraj, Moneer A. Univ Malaysia Pahang Fac Engn Technol Pekan Pahang Malaysia TATI Univ Coll Fac Elect & Automat Engn Technol Terengganu Malaysia

Eddy current testing (ECT) is one of the non-destructive evaluation techniques widely used, especially in oil and gas industries. It characterized noisy data to the less-than-perfect detection and as an indication of serious false alarm problem. However, not many researchers have described in detail the intelligent ECT crack detection system. This paper introduces a review of ECT technique and factors that affect the signal fundamental according to the hardware and software development. First, describe the magnetic excitation resources including the sinusoidal and pulse exciting signal. Second, outlines explanation about the ECT probe. The explanations are more about the probes development for air core probe and giant magnetoresistance probe. Third, there is discussion on ECT circuit that used including ECT system, ECT rotating magnetic field and application measurement for optimal control parameters. The defect in characterizations and measurement are discussed on the fourth part of this paper. The fourth part discusses the ECT lift-off compensation including the lift-off and application of intelligent technique in ECT. The limitations of lift-off for coil probe and compensation techniques also discussed in this part. Finally, a comprehensive review of previous studies on the application of intelligent ECT crack detection in nondestructive ECT is presented.

关键词： eddy current testing crack detection magnetic fields optimal control software architecture control engineering computing eddy current testing defect classification defect characterisation nondestructive evaluation techniques oil industries gas industries nuclear industries coating industries intelligent ECT crack detection system nondestructive testing signal fundamental hardware development software development magnetic excitation resources sinusoidal exciting signal pulse exciting signal air core probe giant magnetoresistance probe electronic circuit rotating magnetic field optimal control parameters air coil lift-off

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Hardware implementation of the fuzzy logic MPPT in an Arduino card using a Simulink support package for PV application

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IET RENEWABLE POWER GENERATION 2019年第3期13卷 510-518页

作者： Fannakh, Mhamed Elhafyani, Mohamed Larbi Zouggar, Smail Univ Mohammed 1st High Sch Technol Lab Elect Engn & Maintenance LEEM Oujda Morocco

The work presented in this study aims to develop an intelligent algorithm, based on fuzzy logic, to track the maximum power point (MPP) of a photovoltaic (PV) panel. Modelling and simulation steps of the PV panel are made by using the MATLAB/Simulink environment, before passing to the description of fuzzy logic MPP tracking (MPPT) algorithm. On an Arduino Mega 2560 controller board, a real-time implementation of the MPPT algorithm by using Simulink Support Package for Arduino Hardware in MATLAB/Simulink was conducted to experimentally validate the preliminary results of simulations. The proposed work outlines also the solution to modify pulse-width modulation frequency of Arduino when it is used with Simulink.

关键词： control system synthesis fuzzy control power generation control maximum power point trackers digital simulation control engineering computing photovoltaic power systems Matlab microcontrollers pulse width modulation software packages Arduino card Simulink support package PV application intelligent algorithm maximum power point photovoltaic panel PV panel MATLAB Simulink environment fuzzy logic MPP tracking algorithm Arduino Mega 2560 controller board hardware implementation pulse-width modulation frequency

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Plithogenic multi-criteria decision making approach on airspace planning scheme evaluation based on ATC-flight real-time simulation

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IET INTELLIGENT TRANSPORT SYSTEMS 2022年第11期16卷 1471-1488页

作者： Liang, Binbin Han, Songchen Li, Wei Han, Yunxiang Liu, Fan Zhang, Ying Lin, Chen Sichuan Univ Sch Aeronaut & Astronaut Chengdu 610065 Peoples R China Sichuan Univ Natl Key Lab Fundamental Sci Synthet Vis Chengdu Peoples R China Air Traff Management Bur Civil Aviat Adm China Beijing Peoples R China

Airspace planning scheme evaluation based on ATC-Flight real-time simulation which incorporates air traffic control simulator and flight simulator has become increasingly important. It has irreplaceable advantages of truly simulating and in-depth evaluating airspace operation, especially for analyzing human factors. As a multi-criteria decision making (MCDM) problem, it poses challenges which this study aims to overcome from three aspects. Firstly, the complexity of airspace and the characteristics of ATC-Flight real-time simulation are analyzed to build a multi-criteria evaluation system. The criteria include air traffic flow, airspace operational performance, flight procedure quality, cost, controller workload and pilot workload. Secondly, a novel weighting method based on plithogenic set is presented to derive robust subjective criteria weights from a group of human decision makers. The subjective weights are then combined with objective weights using game theory to determine cumulative criteria weights. Thirdly, technique for order preference by similarity to ideal solution (TOPSIS) and grey correlation analysis are integrated to perform comprehensive evaluation and ranking. The first series of ATC-Flight real-time simulations in China are conducted to illustrate a case study. The results demonstrated that the proposed MCDM approach could improve the accuracy and discriminability of evaluation results, and outperformed other existing well-known MCDM algorithms.

关键词： ATC-flight real-time simulation technique for order preference by similarity to ideal solution China control engineering computing airspace planning scheme evaluation air traffic control human factors airspace operation flight simulator multicriteria evaluation system aerospace simulation MCDM decision making grey systems TOPSIS plithogenic multicriteria decision making approach air traffic control simulator game theory robust subjective criteria weights grey correlation analysis

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APL AND GRAPH-THEORY IN DYNAMIC-SYSTEMS ANALYSIS

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IEE PROCEEDINGS-D control THEORY AND APPLICATIONS 1981年第3期128卷 85-92页

作者： SCHIZAS, C EVANS, FJ Queen Mary College Deparment of Electrical & Electronic Engineering University of London London UK

It is demonstrated how well-established graph theoretic result can be exploited in the analysis of large-scale systems, and directed towards question of design such as controllability and stability. The generalised na... 详细信息

关键词： stability interactive language large-scale systems controllability control engineering computing dynamic systems analysis control system synthesis graph theory design APL Multivariable control systems control system analysis and synthesis methods Stability in control theory control system analysis computing

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Signal difference-based deadband control for networked control systems with variable sampling intervals

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IET control THEORY AND APPLICATIONS 2014年第15期8卷 1439-1448页

作者： Liu, Ying-Ying Che, Wei-Wei Chu, Yun-Kai Shenyang Univ Sch Informat Engn Shenyang 110044 Peoples R China Shenyang Univ Key Lab Mfg Ind Integrated Automat Shenyang 110044 Peoples R China Chinese Acad Sci Shenyang Inst Automat Shenyang 110016 Liaoning Peoples R China

This study investigates a signal difference-based deadband control approach as a solution to reduce data transmission in networked control systems (NCSs). A new modelling method for the NCSs with time-varying delays, time-varying sampling intervals and signal transmission deadbands is presented. The Lyapunov functional with discontinuity is exploited, which takes full advantages of the NCSs' characteristic information including the bounds of network delay (BND), the bounds of sampling interval (BSI) and the bounds of transmission deadband (BTD). In addition, it has been shown that Lyapunov functional decreases at the jump instants. Furthermore, the new stability analysis and stabilisation conditions for the NCSs are proposed, which describes the relationship of BND, BSI, BTD and the system stability. Three examples are used to demonstrate the effectiveness of the proposed methods. The simulation results have shown that the proposed approach could guarantee the system asymptotically stable and effectively reduce the data transmission in network channel.

关键词： networked control systems sampling methods delays time-varying systems Lyapunov methods asymptotic stability control engineering computing signal difference-based deadband control networked control systems variable sampling intervals data transmission NCS time-varying delays time-varying sampling intervals signal transmission deadbands Lyapunov functional bounds of network delay BND bounds of sampling interval BSI bounds of transmission deadband BTD stability analysis stabilisation conditions asymptotic stability network channel

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Single bit-line 8T SRAM cell with asynchronous dual word-line control for bit-interleaved ultra-low voltage operation

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IET CIRCUITS DEVICES & SYSTEMS 2018年第6期12卷 713-719页

作者： Huang, Chi-Ray Chiou, Lih-Yih Natl Cheng Kung Univ Dept Elect Engn Tainan Taiwan

This study proposes a single bit-line and disturbance-free static random-access memory (SRAM) cell for ultra-low voltage applications. SRAM cell with read-decoupled and cross-point structure addresses both the read-disturb and half-select stability issues;nevertheless, the write-ability is degraded due to the stacked pass transistors. In this study, the authors propose a single-ended 8T bit-cell and dual word-line control technique that can simultaneously improve the read stability, half-select stability, and write-ability without additional peripheral circuits, which is advantageous for bit-interleaved ultra-low voltage operations. A 4kb test chip was implemented in a 90nm complementary metal-oxide-semiconductor process to verify the proposed design. Silicon measurements indicate that the proposed design can operate at a voltage as low as 360mV with 2.68W power consumption.

关键词： CMOS integrated circuits SRAM chips low-power electronics integrated circuit design control engineering computing asynchronous machines machine control asynchronous dual word-line control bit-interleaved ultra-low voltage operation random-access memory cell write-ability read stability ultra-low voltage single bit-line 8T SRAM cell ingle-ended 8T bit-cell dual word-line control half-select stability metal-oxide-semiconductor process

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COMPUTER-AIDED-DESIGN OF control-SYSTEMS VIA OPTIMIZATION

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PROCEEDINGS OF THE INSTITUTION OF ELECTRICAL ENGINEERS-LONDON 1979年第6期126卷 573-578页

作者： BECKER, RG HEUNIS, AJ MAYNE, DQ Department of Computing and Control Imperial College of Science and Technology London UK

The paper describes a computer-aided-design procedure which may be used to design,inter alia, multivariable control systems which satisfy constraints on peak overshoot of step response on control magnitudes, control r... 详细信息

关键词： multivariable control systems control system CAD control system analysis and synthesis methods peak overshoot Optimisation step response Multivariable control systems Optimisation techniques control engineering computing optimisation control rates

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Testing and validation of wide-area control of STATCOM using real-time digital simulator with hybrid HIL-SIL configuration

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IET GENERATION TRANSMISSION & DISTRIBUTION 2017年第12期11卷 3039-3049页

作者： Musleh, Ahmed S. Muyeen, S. M. Al-Durra, Ahmed Kamwa, Innocent Khalifa Univ Sci & Technol Dept Elect & Comp Engn PI Campus Abu Dhabi U Arab Emirates Curtin Univ Dept Elect & Comp Engn Perth WA Australia Hydroquebec IREQ Power Syst & Math Varennes PQ Canada

This study presents a novel interfacing setup for testing and validating wide-area monitoring and control (WAMC) techniques used in smart grids. The main purpose of this study is to provide a realistic approach for conducting WAMC studies. In here, a wide-area controller (WAC) for a flexible AC transmission system (FACTS) device is implemented. The measurements for the WAC are collected using phasor measurements units (PMUs). Three main segments are being interfaced in this study. First, the real-power grid, the local area controller of the actual FACTS device, and the PMUs are simulated using real-time digital simulator. This simulation represents the central simulation and is interfaced with the WAC, which is realised using a MATLAB-based program. This interface represents a novel software-in-the-loop (SIL) scheme. On the other hand, an actual FACTS device is designed and interfaced to the central simulation via hardware-in-the-loop (HIL) scheme. This SIL and HIL combination makes the experimental testbed more realistic and closer to the industrial standard. Various tests are conducted to examine the performance of the developed testbed.

关键词： static VAr compensators phasor measurement flexible AC transmission systems digital simulation control engineering computing power engineering computing hardware-in-the loop simulation smart power grids power transmission control HIL scheme SIL scheme software-in-the-loop scheme MATLAB-based program PMU phasor measurements units FACTS device flexible AC transmission system device wide-area controller smart grids hybrid HIL-SIL configuration real-time digital simulator STATCOM WAMC techniques wide-area monitoring-and-control techniques

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A CCS CASE-STUDY - A SAFETY-CRITICAL SYSTEM

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SOFTWARE engineering JOURNAL 1991年第4期6卷 159-167页

作者： BAILLIE, J School of Information Sciences Hatfield Polytechnic Hatfield UK

A level-crossing control system is specified in CCS, motivated by a temporal logic specification of the safety requirements. We show that, with certain reservations, these can be satisfactorily stated entirely within CCS. The crossing system is divided into two smaller subsystems, which are shown to be equivalent to the original single system, and whose behaviour is then analysed using the methods of the calculus. We also show that the crossing satisfies the safety requirements;there is no bisimulation although the system is both 'may' and 'must' equivalent to the specification. Some of the implications of this are discussed.

关键词： calculus formal specification control engineering computing Mathematical techniques engineering mathematics and numerical techniques traffic computer control Formal logic Road-traffic system control level-crossing control system Rail-traffic system control safety-critical system CCS Calculus of Communicating Systems process algebras temporal logic temporal logic specification

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