检索结果-内蒙古大学图书馆

A MICROCOMPUTER-BASED AUTOMATIC-control STRATEGY FOR A RUBBER EXTRUSION PRODUCTION LINE

SOFTWARE & MICROSYSTEMS 1985年第5-6期4卷 145-152页

作者： STOTEN, DP ROONEY, BG UNIV BRISTOL DEPT MECH ENGNBRISTOL BS8 1TRAVONENGLAND AVON TYRES PLC MELKSHAMWILTSENGLAND

The paper describes the initial stages and immediate aims of an engineering project to control a tyre tread production line. The line is part of the Avon Tyres pic plant at Melksham, Wiltshire. The paper specifically describes the modelling, automatic control, hardware and software developments that are (and will be) used as a basis for the continuation of the project. Ultimately, the technology developed and expertise gained on the project will be extended to the control of other plants within the Avon group.

关键词： tyre tread production line rubber extrusion production line control engineering computing microcomputer applications Avon Tyres computerised control control engineering computing automatic control software developments rubber industry Rubber and plastics industry engineering project computing in other engineering fields

来源：评论

学校读者我要写书评

暂无评论

USING A BINARY DECISION controlLER

引用

SOFTWARE & MICROSYSTEMS 1985年第5-6期4卷 133-144页

作者： DOWSING, RD GOSTLING, SM UNIV E ANGLIA SCH INFORMAT SYSTNORWICH NR4 7TJNORFOLKENGLAND

A binary decision controller is a programmable logic device whose use falls between that of hard-wired logic and microcomputer controllers. The paper explores the use of this type of controller for a number of simple ... 详细信息

关键词： Programmable controllers control engineering computing controllers digital control computerised control programmable logic device binary decision controller logic devices

来源：评论

学校读者我要写书评

暂无评论

GLOBALLY STABLE NON-LINEAR FLIGHT control-SYSTEM

引用

IEE PROCEEDINGS-D control THEORY AND APPLICATIONS 1983年第3期130卷 93-102页

作者： MCLEAN, D Department of Transport Technology Loughborough University of Technology Loughborough UK

The use of linear, constant feedback control in automatic flight control systems for aircraft inevitably gives rise to formidable design difficulties when attempting to satisfy the conflicting requirements for faithful tracking of a pilot's manoeuvre commands and maintaining the aircraft's trimmed attitude in the presence of atmospheric turbulence. Two nonlinear control policies, VICTOR and ZOC, are shown to provide superior performance and, when used simultaneously in the same flight control system, to assure global stability. Such stability obviates the need to provide adaptive control or gain-scheduling schemes to satisfy the flying quality requirements over the entire flight envelope of an aircraft. The potential performance of the nonlinear control is demonstrated by means of some results obtained from a digital simulation of a pitch-rate manoeuvre-demand system for a typical medium jet transport aircraft.

关键词： jet transport aircraft stability Aerospace engineering computing Nonlinear control systems control engineering computing Aerospace control VICTOR Aerospace industry control technology and theory aerospace control flight control system Stability in control theory pitch-rate manoeuvre-demand system nonlinear control systems digital simulation aircraft ZOC

来源：评论

学校读者我要写书评

暂无评论

Design and implementation of an OLE for process control unified architecture aggregating server for a group of flexible manufacturing systems

引用

IET SOFTWARE 2011年第4期5卷 406-414页

作者： Girbea, A. Nechifor, S. Sisak, F. Perniu, L. Transylvania Univ Brasov Dept Automat Fac Elect Engn & Comp Sci Brasov 500174 Romania PSE Siemens Romania Corp Technol Brasov 500007 Romania

The article focuses on the development of an OPC UA (object linking and embedding (OLE) for process control unified architecture) server. One of the major concerns regarding this new specification is the migration from the old component object model (COM) to the new UA specification. From the various migration strategies described in this article, the authors' server represents a special adapter software solution which aggregates several COM servers, one for each flexible manufacturing system (FMS) modelled in the address space of the UA server. The article focuses on the advantages introduced by the new specification like the unified modelling capability and the extensible meta model. The address space is exemplified by means of a screw fitting station, which is part of the flexible line, on which the UA server has been tested. From the four generally accepted use cases, the server implements the first two: observation and control. They are mainly supported through the variables and the methods of the address space. During the testing phase, the minimum sampling interval regarding the communication with the underlying COM servers has been determined for a different number of FMSs. As a result the special adapter software solution is a fast but also a well-performing approach, which works well even in very complex environments.

关键词： unified modelling capability OPC UA COM server object linking and embedding process control control engineering computing Unified Modeling Language Industrial applications of IT flexible manufacturing system Production engineering computing unified architecture aggregating server extensible meta model software architecture Manufacturing systems Formal methods screw fitting station component object model flexible manufacturing systems FMS modelling adapter software solution Distributed systems software OLE for process control Object-oriented programming distributed object management

来源：评论

学校读者我要写书评

暂无评论

The control of high-speed machines

引用

computing & control engineering JOURNAL 1999年第6期10卷 245-255页

作者： Watson, J BOC Edwards Burgess Hill RH15 9TT W Sussex England

The market for industrial machinery is driven by increased product throughput, greater application flexibility and the expectation of decreasing purchase price and operating cost. As we move into the 21st century, there is little doubt this trend will encourage the development of integrated high-performance mechatronic systems. This Inaugural Address follows the theme of highspeed machinery control through examples taken from a DTI Link programme and from the requirements of high-performance vacuum pumping systems for the semiconductor and instrumentation industries. It uses these examples to highlight the challenges of managing collaborative research involving academic and industrial partners and the ever more important theme of fast-to-market product development.

关键词： high-speed machine control Design integrated high-performance mechatronic systems product development industrial partners control engineering computerised instrumentation industrial machinery Microactuators Research and development Computerised instrumentation high-performance vacuum pumping systems semiconductor industry DTI Link programme collaborative research operating cost instrumentation industry vacuum pumps research and development management product throughput academic partners control engineering computing purchase price application flexibility fast-to-market product development mechatronics

来源：评论

学校读者我要写书评

暂无评论

Toward a Science of Cyber-Physical System Integration

引用

PROCEEDINGS OF THE IEEE 2012年第1期100卷 29-44页

作者： Sztipanovits, Janos Koutsoukos, Xenofon Karsai, Gabor Kottenstette, Nicholas Antsaklis, Panos Gupta, Vijay Goodwine, Bill Baras, John Wang, Shige Vanderbilt Univ Inst Software Integrated Syst Nashville TN USA Univ Notre Dame Dept Elect Engn Notre Dame IN 46556 USA Univ Notre Dame Dept Aerosp & Mech Engn Notre Dame IN 46556 USA Univ Maryland Dept Elect & Comp Engn College Pk MD 20740 USA Gen Motors Warren MI 48093 USA

System integration is the elephant in the china store of large-scale cyber-physical system (CPS) design. It would be hard to find any other technology that is more undervalued scientifically and at the same time has bigger impact on the presence and future of engineered systems. The unique challenges in CPS integration emerge from the heterogeneity of components and interactions. This heterogeneity drives the need for modeling and analyzing cross-domain interactions among physical and computational/networking domains and demands deep understanding of the effects of heterogeneous abstraction layers in the design flow. To address the challenges of CPS integration, significant progress needs to be made toward a new science and technology foundation that is model based, precise, and predictable. This paper presents a theory of composition for heterogeneous systems focusing on stability. Specifically, the paper presents a passivity-based design approach that decouples stability from timing uncertainties caused by networking and computation. In addition, the paper describes cross-domain abstractions that provide effective solution for model-based fully automated software synthesis and high-fidelity performance analysis. The design objectives demonstrated using the techniques presented in the paper are group coordination for networked unmanned air vehicles (UAVs) and high-confidence embedded control software design for a quadrotor UAV. Open problems in the area are also discussed, including the extension of the theory of compositional design to guarantee properties beyond stability, such as safety and performance.

关键词： control engineering computing embedded software system analysis and design

来源：评论

学校读者我要写书评

暂无评论

Acoustic diagnostics of electrical origin fault modes with readily available consumer-grade sensors

引用

IET ELECTRIC POWER APPLICATIONS 2019年第12期13卷 1946-1953页

作者： Grebenik, Jarek Bingham, Chris Srivastava, Saket Univ Lincoln Sch Engn Lincoln LN6 7TS England

Acoustic diagnostics, traditionally associated with mechanical fault modes, can potentially solve a wider range of monitoring applications. Typically, fault modes are induced purposefully by the researcher through physical component damage whilst the system is shutdown. This study presents low-cost real-time fault diagnostics of a previously unreported acute electrical origin fault that manifests sporadically during system operation with no triggering intervention. A suitability study into acoustic measurements from readily available consumer-grade sensors for low-cost real-time diagnostics of audible faults, and a brief overview of the theory and configuration of the wavelet packet transform (including optimal wavelet selection methods) and empirical mode decomposition processing algorithms is also included. The example electrical origin fault studied here is an unpredictable current instability arising with the pulse-width modulation controller of a BrushLess DC motor. Experimental trials positively detect 99.9% of the 1160 resultant high-bandwidth torque transients using acoustic measurements from a USB microphone and a smartphone. While the use of acoustic techniques for detecting emerging electrical origin faults remains largely unexplored, the techniques demonstrated here can be readily adopted for the prevention of catastrophic failure of drive and power electronic components.

关键词： brushless DC motors wavelet transforms control engineering computing power electronics fault diagnosis signal denoising physical component damage real-time fault diagnostics unreported acute electrical origin fault system operation suitability study acoustic measurements readily available consumer-grade sensors real-time diagnostics audible faults optimal wavelet selection methods empirical mode decomposition processing algorithms example electrical origin fault acoustic techniques electrical origin faults acoustic diagnostics electrical origin fault modes mechanical fault modes wider range monitoring applications

来源：评论

学校读者我要写书评

暂无评论

SNR-dependent drone classification using convolutional neural networks

引用

IET RADAR SONAR AND NAVIGATION 2022年第1期16卷 22-33页

作者： Dale, Holly Baker, Chris Antoniou, Michail Jahangir, Mohammed Atkinson, George Harman, Stephen Univ Birmingham Microwave Integrated Syst Lab Birmingham B15 2TT W Midlands England Aveillant Cambridge England

Radar sensing offers a method of achieving 24-h all-weather drone surveillance, but in order to be maximally effective, systems need to be able to discriminate between birds and drones. This work examines drone-bird classification performance as a function of signal to noise ratio (SNR). Classification at low SNR values is necessary in order to classify drones with a small radar cross-section (RCS), as well as to facilitate reliable classification at longer ranges. To investigate the relationship between classification performance and SNR, Gaussian noise is added to an experimentally obtained dataset of radar spectrograms. Classification is performed by convolutional neural networks (CNNs). It is shown that for the data available classification accuracy drops with falling SNR, as might be expected for any given CNN. The degree to which performance degrades with reduced SNR is presented. It is further shown that simpler network architectures are more robust to noise. Finally, it is demonstrated that data augmentation can be used as a means of enhancing classification accuracy at lower SNR values. Bayesian optimisation is used to find the optimal augmentation hyperparameters and overall, classification accuracies of 92% are achieved at low SNR.

关键词： radar cross-sections Bayes methods Gaussian noise aerospace computing radar cross-section RCS control engineering computing data augmentation optimal augmentation hyperparameters optimisation radar sensing all-weather drone surveillance convolutional neural networks radar signal processing convolutional neural nets signal to noise ratio radar receivers neural net architecture surveillance data available classification accuracy autonomous aerial vehicles Bayesian optimisation SNR-dependent drone classification radar spectrograms signal classification network architectures drone-bird classification performance CNNs

来源：评论

学校读者我要写书评

暂无评论

Simulation method for DSP-controlled active PFC high-frequency power converters

引用

IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS 2000年第3期147卷 159-166页

作者： Mobin, S Hiraki, E Takano, H Nakaoka, M Yamaguchi Univ Yamaguchi Japan Hitachi Med Co Hitachi Ibaraki Japan

A generic simulation approach for digital-signal-processor (DSP) controlled power converter systems is described. Software program statements for simulating a feedback control scheme could also be incorporated in the software code of a DSP-controlled power conversion system. The power electronic circuit simulation technique is based on the substitution of switch-modulated resistors in place of all the active and/or passive power switches;one stale equation described by state variables, i.e. inductor currents and capacitor voltages, and the solution of the state equation is computed by an appropriate numerical method. The simulation approach is explained by a practical application example of the DSP-controlled active-switch three-phase power-factor-correction (FC) converter system.

关键词： digital control Digital signal processing chips inductor currents control engineering computing circuit simulation Power engineering computing Power convertors and power supplies to apparatus feedback switching circuits power factor correction power convertors active PFC high-frequency power converters control simulation feedback control scheme power semiconductor switches Computer-aided circuit analysis and design DSP control switch-modulated resistors control system design and analysis state equation Electronic engineering computing computer simulation Power system management, operation and economics control of electric power systems active-switch three-phase power-factor-correction convertor power electronic circuit simulation control system analysis computing Microprocessors and microcomputers capacitor voltages digital signal processing chips

来源：评论

学校读者我要写书评

暂无评论

TRANSPUTER IMPLEMENTATION OF SYSTOLIC ARRAYS FOR MODEL-REDUCTION

引用

IEE PROCEEDINGS-E COMPUTERS AND DIGITAL TECHNIQUES 1990年第5期137卷 343-352页

作者： MEGSON, GM Computing Laboratory University of Newcastle upon Tyne Newcastle upon Tyne UK

In the paper the author develops a unified bidirectional linear systolic array for performing model reduction of a feedback control system using continued fractions. The array is capable of computing the 1st, 2nd and 3rd Cauer forms of the fraction and their associated inverses as well as the Routh stability criterion. Timing graphs are presented to indicate the speed-up obtained on five transputers for common problem ranges.

关键词： Logic circuits control engineering computing control system analysis and synthesis methods control system CAD Routh stability criterion timing graph cellular arrays systolic arrays feedback control system Cauer forms feedback unified bidirectional linear systolic array model reduction stability criteria Stability in control theory

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：