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FAULT-TOLERANT TRANSPUTER-BASED controlLER CONFIGURATIONS FOR GAS-TURBINE ENGINES

IEE PROCEEDINGS-D control THEORY AND APPLICATIONS 1990年第4期137卷 253-260页

作者： THOMPSON, HA FLEMING, PJ School of Electronic Engineering Science University College of North Wales Bangor UK

Parallel processing is often employed in real-time control systems to reduce execution times. The paper, however, investigates the potential of parallel processing, and one device, in particular, the Inmos transputer, in the design of a fault-tolerant high-integrity computer module for gas-turbine engine control. Introducing multiple processors into a control system has the potential to render that system less reliable in an operational sense, than a conventional single processor implementation. However, attention to system design can, in fact, exploit parallel-processing capability to result in improved reliability. While three-lane voting systems are commonly favoured in avionics systems, owing to hardware implementation constraints, gas-turbine engine controllers are generally realised as two-lane systems. Transputer system configurations are devised in an attempt to overcome this constraint. In particular, an ‘overlapping triad’ topology is investigated in detail, and both strength and weaknesses of the present transputer architecture are revealed.

关键词： Aerospace engineering computing Aerospace control topology gas-turbine fault tolerant module gas turbines controller fault tolerant computing control system synthesis architecture avionics transputer aerospace computer control design control of heat systems control engineering computing computerised control Inmos two-lane systems parallel processing

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Practical test method for the sensitivity of programmable logic controller to voltage sags and short interruptions

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IET CIRCUITS DEVICES & SYSTEMS 2020年第6期14卷 830-837页

作者： Xu, Zhong Mo, Wenxiong Gui, Liangyu Ma, Zhiyuan Xiao, Xianyong Guangzhou Power Supply Bur Ltd Elect Power Test & Res Inst Guangzhou Peoples R China Sichuan Univ Coll Elect Engn Chengdu Peoples R China

Voltage sag and short interruption lead to the tripping of sensitive equipment and cause the economic loss of the industry users. A programmable logic controller (PLC) is essential equipment used in the industrial process. However, there is no detailed understanding of the sensitivity of PLC under voltage sag and short interruption. The response characteristic of PLC under voltage sag is studied. This study proposes a new testing method, called the dichotomy test method (DTM) to do the test. This study builds the testing platform and tests the sensitivity of six PLCs from five famous PLC manufacturers. The testing considers the characteristics of voltage sag, including magnitude, duration, point-on-wave, phase-angle-jump, different supply voltage, slow recovery voltage sag, multiple voltage sags and so on. The tests prove that DTM has the advantage of accuracy, robustness and workload, compared with the traditional test method. The quantitative and qualitative response characteristics of PLC under voltage sag are obtained.

关键词： control engineering computing power supply quality programmable controllers practical test method programmable logic controller short interruption lead dichotomy test method slow recovery voltage sag multiple voltage sags traditional test method

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Cooperative task scheduling for networked uninhabited air vehicles

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IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS 2008年第2期44卷 561-581页

作者： Gil, Alvaro E. Passino, Kevin M. Ganapathy, Sriram Sparks, Andrew Ohio State Univ Columbus OH 43210 USA USAF Res Lab Wright Patterson AFB OH 45433 USA

In the work presented here, we study a cooperative control problem for a network of uninhabited air vehicles (UAVs) where it is assumed that after deployment a set of tasks is given to a group of UAVs and the UAVs must cooperate to decide which UAV should process each task. The cooperation must occur during real-time operation due to a need to repeatedly process each task, in spite of imperfect communications (e.g., messages with random but bounded delays), and the possibility that tasks "pop-up." We show how to view this as a cooperative scheduling problem, and how to derive bounds on mission-level performance metrics. Simulations are used to compare the approach with a noncooperative strategy and to provide design guidelines for the cooperative scheduler.

关键词： control engineering computing cooperative systems remotely operated vehicles scheduling space vehicles cooperative control problem cooperative task scheduling design guidelines mission-level performance metrics networked uninhabited air vehicles noncoope Unmanned vehicles REAL TIME OPERATION vehicle Unmanned Aerial Vehicle control engineering computing coordinated control cooperative systems TASK SCHEDULING Religious Missions Space vehicles

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Review of the automatic train control system for Cairo Metro Line 2

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POWER engineering JOURNAL 1998年第5期12卷 217-228页

作者： Banerjee, MK El Hoda, N Parsons Brinckerhoff Int USA New York NY 10119 USA

The compatibility of AC propulsion systems with coded train detection and on-board speed code reception systems is always a concern. A review of an automatic train control system commissioned for Greater Cairo Metro System is presented. The compatibility of track-to-train transmission with the inverter-controlled AC drive and the 750 V DC third-rail power supply is also examined.

关键词： a.c. machines Electromagnetic compatibility and interference traffic control AC motor drives Power convertors and power supplies to apparatus DC third-rail power supply onboard speed code reception systems 750 V inverter-controlled AC drive power supplies to apparatus electric propulsion Drives automatic train control system Rail-traffic system control Traffic engineering computing rapid transit systems EMI compatibility railways coded train detection track-to-train transmission electromagnetic compatibility Distribution networks AC propulsion systems electromagnetic interference transport control Transportation invertors rail traffic Greater Cairo Metro System control engineering computing Cairo Metro line 2

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Alternative implementation of vector control for induction motor and its experimental evaluation

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IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS 2000年第1期147卷 7-13页

作者： Nerys, JWL Hughes, A Corda, J Univ Fed Goias Escola Engn Eletr Goiania Go Brazil Univ Leeds Sch Elect & Elect Engn Leeds LS2 9JT W Yorkshire England

An implementation of vector control for induction motors is presented, where there is no need for information concerning the rotor flux position and matrix transformations. It shows how the stator reference phase currents can be generated and changed in real time from digitally stored sinewaves, so to achieve independent control of torque at constant rotor flux. Experimental evaluation of the new scheme is made for sudden changes in the load torque and for the step changes of the speed reference signal. The arrangement of a DC load system enabling sudden changes in load torque is also described.

关键词： Asynchronous machines digital control constant rotor flux machine vector control control engineering computing Power engineering computing machine theory power engineering computing load torque digitally stored sinewaves independent torque control real-time systems torque control control performance induction motors stators control design DC load system induction motor vector control control system synthesis Mechanical variables control control system analysis and synthesis methods control of electric power systems stator reference phase currents speed reference signal machine testing

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A Unified Cloud Platform for Autonomous Driving

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COMPUTER 2017年第12期50卷 42-49页

作者： Liu, Shaoshan Tang, Jie Wang, Chao Wang, Quan Gaudiot, Jean-Luc PerceptIn Sunnyvale CA 94085 USA South China Univ Technol Sch Comp Sci & Engn Guangzhou Guangdong Peoples R China Baidu Autonomous Driving Unit Beijing Peoples R China Univ Calif Irvine Dept Elect Engn & Comp Sci Irvine CA USA

Tailoring cloud support for each autonomous-driving application would require maintaining multiple infrastructures, potentially resulting in low resource utilization, low performance, and high management overhead. To address this problem, the authors present a unified cloud infrastructure with Spark for distributed computing, Alluxio for distributed storage, and OpenCL to exploit heterogeneous computing resources for enhanced performance and energy efficiency.

关键词： Automobiles Cloud computing control engineering computing Energy Efficiency Heterogeneous computing Resources Open CL Distributed Storage Alluxio Distributed computing Spark Unified Cloud Infrastructure Autonomous Driving Unified Cloud Platform Autonomous Automobiles Field Programmable Gate Arrays Distributed computing Cloud computing Computational Modeling Autonomous Vehicles Self Driving Cars Distributed computing Distributed Storage Heterogeneous computing Simulation Testing Model Training Map Generation Hadoop Map Reduce Spark Alluxio Open CL YARN Linux Containers LXC Hadoop Distributed File System HDFS Robot Operating System ROS Resilient Distributed Dataset RDD Bin Pipe RDD Parallel Distributed Deep Learning Paddle Baidu Convolution Neural Network CNN Li DAR

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COMPUTER-BASED SUPERVISORY control AND ENERGY MANAGEMENT-SYSTEM FOR THE CITY OF CAPE-TOWN

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IEE PROCEEDINGS-C GENERATION TRANSMISSION AND DISTRIBUTION 1988年第1期135卷 41-50页

作者： MALT, APJ CLARKE, GD ROBINSON, PE Power and Water Systems Consultants Ltd. Henley on Thames UK Merz and McLellan Ltd. Newcastle upon Tyne UK

Cape Town City Council is responsible for the supply of electricity to the city area. To achieve this, the council owns and operates thermal and pumped-storage power stations and extensive HV transmission and LV distribution networks. Power is also purchased from the national supply authority. Prior to the introduction of the control system described in this paper limited supervisory control and data acquisition facilities existed to provide some degree of remote control for the network. In addition to duties associated with supervision of both the HV and LV networks, the control centre operators were also responsible for energy management involving generator scheduling and control, and load-shedding when required. To assist the operators in their extensive and onereous duties a new computer-based control centre has been developed and was commissioned in 1984. Because of the unusual mix of power sources special software had to be developed for energy management purposes. Descriptions are given of the functional and practical aspects of the control centre, and of associated hardware and software facilities and also some commissioning experiences.

关键词： computer-based control centre Pumped storage stations and plants Power engineering computing Power transmission, distribution and supply transmission networks energy management system distribution networks power system computer control HV transmission networks pumped-storage power stations thermal power stations control of electric power systems electricity supply Power system management, operation and economics LV distribution networks control engineering computing Thermal power stations and plants power stations Cape Town City Council

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SELF-TUNING control

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PROCEEDINGS OF THE INSTITUTION OF ELECTRICAL ENGINEERS-LONDON 1979年第6期126卷 633-640页

作者： CLARKE, DW GAWTHROP, PJ Department of Engineering Science University of Oxford Oxford UK

Self tuning is an important new branch of control which is attracting increasing theoretical and practical interest. The objective of self tuning is to control systems with unknown constant or slowly varying parameters, so theoretical interest is concerned with the stability, performance and convergence of the recursive algorithms involved, while practical interest derives from its potential as a simple controller commissioning tool, both as a method for controlling time-varying or nonlinear plant over a range of operating points, and for dealing with batch problems where the plant or materials vary over successive batches. This paper summarises and expands previous work on the design of self-tuning controllers. It discusses the closed-loop properties of various classes of self tuner, convergence concepts and results, and some of the technical problems involved with implementing self tuners on small computers or microprocessors.

关键词： controller commissioning tool controllers microprocessor implemented systems Nonlinear control systems control system analysis and synthesis methods performance recursive algorithms convergence computerised control control system synthesis self tuning control controllers control engineering computing nonlinear control systems

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Simple and fast computation photovoltaic emulator using shift controller

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IET RENEWABLE POWER GENERATION 2020年第11期14卷 2017-2026页

作者： Ayop, Razman Wei Tan, Chee Lawan Bukar, Abba Univ Teknol Malaysia Sch Elect Engn Utm Johor Bahru 81310 Malaysia Univ Maiduguri Fac Elect Engn PMB 1069 Borno Nigeria

Photovoltaic (PV) emulator (PVE) is a non-linear power supply that produces a similar output to that of the PV module. It requires a closed-loop controller such as the proportional-integral (PI) and fuzzy logic controllers to operate properly. The PI controller has a low-computational burden and is not robust since the transient response varies under different load conditions. Although the fuzzy logic controller is robust, it requires high-computation capability. This study proposed an alternative approach called the shift controller for the PVE to easily compute and maintain a fast transient response under various load conditions. The performance of the proposed shift controller for the PVE is compared with the performance of the PVEs using the PI and fuzzy logic controllers, respectively. The controllers are simulated using MATLAB/Simulink and implemented using dSPACE ds1104 for experimental validation. The results show that the proposed shift controller computes up to 18 times faster than the fuzzy logic controller. The proposed controller also responds faster to load change than the PI controller.

关键词： PI control photovoltaic power systems transient response fuzzy control closed loop systems computer simulation control engineering computing power engineering computing computational complexity fast computation photovoltaic emulator PVE nonlinear power supply PV module closed-loop controller fuzzy logic controllers PI controller low-computational burden transient response varies high-computation capability fast transient response shift controller MATLAB-Simulink dSPACE ds1104

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An Attack-Resilient CPS Architecture for Hierarchical control: A Case Study on Train control Systems

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COMPUTER 2018年第11期51卷 46-55页

作者： Won, Yuchang Yu, Buyeon Park, Jaegeun Park, In-Hee Jeong, Haegeon Balk, Jeanseong Kang, Kyungtae Lee, Insup Son, Sang Hyuk Park, Kyung-Joon Eun, Yongsoon DGIST Dept Informat & Commun Engn Daegu South Korea DGIST Informat & Commun Engn Daegu South Korea Hanyang Univ Div Comp Sci & Engn Seoul South Korea Hanyang Univ Dept Comp Sci & Engn Seoul South Korea Univ Penn PRECISE Ctr Philadelphia PA 19104 USA DGIST Daegu South Korea

This article presents an attack-resilient architecture for cyber-physical systems (CPSs). As a case study, the authors build a radio-based train control testbed and validate the proposed resilient design architecture.... 详细信息

关键词： control engineering computing Rail Traffic Railway Communication Railway Safety Railways Safety Critical Software Train control Systems Attack Resilient CPS Architecture Hierarchical control System Target CPS Application Resilient Design Architecture Radio Based Train control Cyber Physical Systems Computer Architecture Resilience Monitoring Actuators Wireless Communication Virtual Machine Monitors

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