检索结果-内蒙古大学图书馆

Real-time simulation device for mean arterial pressure of hypotensive patient subjected phenylephrine infusion

ELECTRONICS LETTERS 2020年第17期56卷 865-867页

作者： Coelho, M. S. Silva, S. J. Boschi, S. R. M. S. Rodrigues, S. C. M. Scardovelli, T. A. Barbuy, H. S. Silva, A. P. Mogi Das Cruzes Univ Res & Technol Ctr NPT UMC Mogi Das Cruzes SP Brazil

This Letter presents the implementation in a hardware device of the mean arterial pressure (MAP) response model of patients subjected to the infusion of the vasoconstrictor drug phenylephrine, enabling the development of automatic control systems in the future. The proposed model was firstly developed in a software platform with Simulink/MatLab using block libraries based on previous research carried out with animals and then implemented on hardware using a single-board computer with microcontroller and code generated in C/C++. The responses of MAP were simulated and compared using the proposed software and hardware model, considering the dynamic effects of several patients. The results showed that the hardware model presented 0.43% as the largest absolute percentage error observed in all trials, for an injection rate of the drug varying in steps with levels of 40 ml/h

关键词： cardiovascular system drugs haemodynamics power engineering computing blood pressure measurement blood vessels neural nets mathematics computing medical control systems medical diagnostic computing microcontrollers patient treatment control engineering computing time simulation device hypotensive patient subjected phenylephrine infusion hardware device mean arterial pressure response model vasoconstrictor drug phenylephrine automatic control systems software platform block libraries single-board computer hardware model

来源：评论

学校读者我要写书评

暂无评论

FLEXIBLE COMPUTER-AIDED DESIGN PROGRAM FOR control SYSTEMS

引用

PROCEEDINGS OF THE INSTITUTION OF ELECTRICAL ENGINEERS-LONDON 1971年第3-4期118卷 618-&页

作者： GRAY, JO YUNG, TF Department of Electrical Engineering & Electronics University of Manchester Institute of Science & Technology Manchester UK

The paper is concerned with a logical extension of some previous work on the computer-aided design of control systems. An interactive conversational-mode design technique is presented; this is particularly relevant to a computer which has a modest working core store but possesses tape or disc back up facilities. No knowledge of computer language is required for effective use of the technique.

关键词： interactive conversational mode design technique CAD control systems synthesis computer-aided design control system synthesis flexible program control engineering computing

来源：评论

学校读者我要写书评

暂无评论

Dynamic speed guidance for active highway signal coordination: roadside against in-car strategies

引用

IET INTELLIGENT TRANSPORT SYSTEMS 2013年第4期7卷 432-444页

作者： Sun, Jian Chen, Shenyang Tongji Univ Minist Educ Dept Traff Engn Shanghai 201804 Peoples R China Tongji Univ Minist Educ Key Lab Rd & Traff Engn Shanghai 201804 Peoples R China Tongji Univ Dept Traff Engn Shanghai 201804 Peoples R China

The effectiveness of signal coordination can be undermined by over-long spacing and different vehicle dynamic characteristics between neighbouring signal intersections in a signalised highway system. This study presents two dynamic speed guidance (DSG) strategies based on the traffic environment and facility deployment to congregate the traffic flow and optimise the arterial coordinated signal control system. One of them is the in-car display for individual guidance, and the other is the roadside display for group guidance. The two DSG strategies are calculated using the rolling horizon approach. A simulation platform that integrates data communication, traffic mobility and DSG application is programmed based on VISSIM, a microscopic simulation model. A section of Cao'an highway is used to assess the efficiency of two DSG strategies. The assessment results show that both the average stops and travel time of arterial vehicles can be optimised with the application of the two DSG strategies. In addition, the in-car strategy provides a significant benefit for on-board unit equipped vehicles, even in a low level of market penetration rate.

关键词： control engineering computing digital simulation traffic engineering computing velocity control road traffic control dynamic speed guidance active highway signal coordination in-car strategy dynamic speed guidance strategy DSG strategy traffic environment facility deployment traffic flow arterial coordinated signal control system in-car display roadside display rolling horizon approach data communication traffic mobility DSG application VISSIM software microscopic simulation model Cao'an highway average vehicle stop vehicle travel time market penetration rate signalised highway system

来源：评论

学校读者我要写书评

暂无评论

INTEGRATED EXCITATION AND TURBINE control IN A MULTIMACHINE POWER-SYSTEM

引用

IEE PROCEEDINGS-C GENERATION TRANSMISSION AND DISTRIBUTION 1989年第6期136卷 331-340页

作者： WALKER, PAW SERAG, AM ABDALLA, OH UNIV HELWAN FAC ENGN & TECHNOLDEPT ELECT MACHINES & POWER ENGNCAIROEGYPT

This paper is concerned with modelling and optimal control studies, by computer simulation, of a multimachine power system comprising three interconnected generator units. The most effective generating unit, for the application of control, is determined by using eigenvalue analysis. A multi-input/multi-output linear model of the system, as seen from this unit, is obtained by least-squares identification. On the basis of this model a multivariable controller is designed, by minimising a quadratic performance index, using the dynamic programming procedure. This local controller employs output feedback, and provides integrated control of the exciter and turbine-valve inputs. Multivariable controllers are also designed and applied to the other generating units, to allow comparative system performance to be examined. System behaviour is assessed in relation to small-and large-disturbance studies. Simulation results include responses to three-phase short circuits, and dynamic and transient stability boundaries.

关键词： turbine control turbine-valve inputs least-squares identification multivariable control systems Power engineering computing integrated excitation control power systems power system computer control 3-phase short circuits quadratic performance index dynamic programming interconnected generator units control of electric power systems multimachine power system computer simulation Power systems control engineering computing eigenvalue analysis controllers digital simulation stability boundaries multivariable controller turbines

来源：评论

学校读者我要写书评

暂无评论

Distributed resilient flocking control of multi-agent systems through event/self-triggered communication

引用

IET control THEORY AND APPLICATIONS 2021年第4期15卷 559-569页

作者： Amirian, Neda Shamaghdari, Saeed Iran Univ Sci & Technol Sch Elect Engn Tehran Iran

This paper proposes a distributed control scheme for multi-agent systems to achieve resilient flocking behaviour via event-based communication. The control scheme can provide the required connectivity conditions to form a flock in the presence of cyberattacks in the network. This method is presented in a fully distributed manner to avoid the use of global data. The developed event-triggered update rules can mitigate the influence of the non-cooperative agents with the weighted mean subsequence-reduced algorithm and reduce unnecessary communication among them. It is proved that under the proposed method, convergence is guaranteed and there is no Zeno behaviour exhibited inherently. To relax the requirement of continuous monitoring of self-state, a self-triggered mechanism is proposed further. Simulation results are given to illustrate the theoretical analysis and show the advantages of the event- and self-triggered controllers.

关键词： weighted mean subsequence-reduced algorithm cyberattacks autonomous aerial vehicles distributed resilient flocking control mobile robots noncooperative agents event-triggered controllers event-based communication resilient flocking behaviour multi-robot systems convergence aerospace computing self-triggered communication self-state mechanism control system security Zeno behaviour event-triggered update rules security of data self-triggered controllers multi-agent systems distributed control multiagent systems control engineering computing connectivity conditions

来源：评论

学校读者我要写书评

暂无评论

ADAPTIVE controlLER FOR STATIC REACTIVE-POWER COMPENSATORS IN POWER-SYSTEMS

引用

IEE PROCEEDINGS-C GENERATION TRANSMISSION AND DISTRIBUTION 1987年第3期134卷 256-264页

作者： DASH, PK PANDA, PC SHARAF, AM HILL, EF UNIV NEW BRUNSWICK DEPT ELECT ENGNFREDERICTON E3B 5A3NBCANADA

The paper presents a comparison of the admittance models for static reactive-power compensators along with a microcomputer-based digital model for power-system dynamic-performance improvement. Emphasis is placed on stability, and it is shown that static reactive-power (VAr) controllers (SVCs) can provide significant benefits in terms of increased transient stability limits and improved damping in terms of synchronising power-flow oscillations. Further introduction of a simplified self tuner for the SVC can dramatically increase the power-system performance under a variety of abnormal operating conditions, such as 3-phase short circuits, load shedding, reactance switching, pole slipping and resynchronisation conditions. The self-tuning digital control for the SVC can be easily implemented on a microcomputer. Simulation results for a sample power system using an LSI-11/23 microcomputer are presented in the paper.

关键词： microcomputer-based digital model electric admittance reactance switching Power engineering computing dynamic-performance improvement admittance models power systems power system computer control synchronising power-flow oscillations resynchronisation conditions 3-phase short circuits self tuner control of electric power systems static reactive-power compensators adaptive controller Power system management, operation and economics stability LSI-11/23 microcomputer control engineering computing pole slipping compensation damping reactive power load shedding digital simulation adaptive control

来源：评论

学校读者我要写书评

暂无评论

'Soft' control desks and alarm display

引用

computing & control engineering JOURNAL 1999年第1期10卷 11-16页

作者： Dicken, CR Natl Power Drax Power Stn Selby YO8 8PQ N Yorkshire England

Recent years have seen many process plants replace hard desk operator interfaces with modern computer based VDU interfaces. Alarm systems have similarly undergone a transformation in their user interface. This article describes some of the developments within the UK coal-fired generating industry in moving to the new technology with specific reference to alarm display philosophy.

关键词： Ergonomic aspects of computing User interfaces Power engineering computing Ergonomics steam power stations UK coal-fired generating industry power station control modern computer based VDU interfaces control of electric power systems process plants power engineering computing alarm display philosophy human factors user interface soft control desks control engineering computing alarm systems user interfaces Security aspects Steam power stations and plants interactive systems

来源：评论

学校读者我要写书评

暂无评论

control devices development of multi-microgrids based on hierarchical structure

引用

IET GENERATION TRANSMISSION & DISTRIBUTION 2016年第16期10卷 4249-4256页

作者： Xu, Zhirong Yang, Ping Zhang, Yujia Zeng, Zhiji Zheng, Chengli Peng, Jiajun South China Univ Technol Sch Elect Power 381 Wushan Rd Guangzhou Guangdong Peoples R China Guangdong Key Lab Clean Energy Technol 25 Cent Ave Guangzhou Guangdong Peoples R China Natl Local Joint Engn Lab Wind Power Control & In 25 Cent Ave Guangzhou Guangdong Peoples R China

With the fast proliferation of microgrids integrated into the power grid, several nearby microgrids with common benefit have been coupled to be multi-microgrids (MMGs), which is a significant stage for developing the smart grid. A suitable control structure and corresponding control device need to be proposed for the MMGs operating efficiently. However, mostly micrgrid control devices are still restricted to the single microgrid and have limited application without the common design. The authors develop control devices with a prodigious popularisation value for the MMGs based on the hierarchical control structure. According to the proposed four-layer control architecture (scheduling layer, central control layer, integrated terminal layer and bottom layer), the hardware and software design suitable for the MMGs control devices and its multi-time scale communication architecture has been presented. Furthermore, the appearance design and interface exploitation were introduced as well. Experimental results are provided to demonstrate the validity of the proposed MMGs control structure and devices, which could contribute to the large-scale application of MMGs control devices and provide a reference for other MMGs projects.

关键词： distributed power generation power generation control hierarchical systems smart power grids control engineering computing user interface management systems large-scale systems control device development multimicrogrids power grid smart grid development micrgrid control devices hierarchical control structure four-layer control architecture scheduling layer central control layer integrated terminal layer bottom layer hardware design software design multitime scale communication architecture MMG control device large-scale application appearance design interface exploitation

来源：评论

学校读者我要写书评

暂无评论

Automated on-ramp merging control algorithm based on Internet-connected vehicles

引用

IET INTELLIGENT TRANSPORT SYSTEMS 2013年第4期7卷 371-379页

作者： Wang, Yunpeng E, Wenjuan Tang, Wenzhong Tian, Daxin Lu, Guangquan Yu, Guizhen Beihang Univ Sch Transportat Sci & Engn Beijing 100191 Peoples R China Soochow Univ Sch Urban Rail Transportat Suzhou 215021 Peoples R China Beihang Univ Sci & Technol Res Inst Beijing 100191 Peoples R China

With the rapid development of Information and Communication Technologies, vehicular networks that communicate with each other will have an innovative application in traffic safety and congestion. This study describes a preliminary study on an automated on-ramp merging control algorithm for vehicles on freeways under condition of Internet-connected vehicles. On the basis of vehicular operation characteristics during the merging process analysis, a cooperative driving algorithm based on Internet of vehicles was designed to achieve ramp merging without collision. Then two on-ramp merging cases, including one vehicle and two vehicles merging into the platoon on main lane, were discussed in detail. Simulation works were carried out and the results proved that the on-ramp merging algorithm was effective, but the vehicle following the leading vehicle on ramp lane is disturbed seriously by the leading vehicle. At the same time, the simulation results also showed the scenario that merging a platoon into the two vehicles on main lane affects the traffic flow more seriously than letting each individual vehicle on ramp lane consecutively to merge in between the two vehicles in the main lane under the same initial condition.

关键词： control engineering computing digital simulation Internet road safety traffic engineering computing road traffic control automated on-ramp merging control algorithm Internet-connected vehicles information and communication technologies vehicular networks traffic safety traffic congestion freeways vehicular operation characteristics merging process analysis cooperative driving algorithm simulation works traffic flow

来源：评论

学校读者我要写书评

暂无评论

Real-time open-switch fault diagnosis in automotive permanent magnet synchronous motor drives based on Kalman filter

引用

IET POWER ELECTRONICS 2020年第12期13卷 2450-2460页

作者： Naseri, Farshid Schaltz, Erik Lu, Kaiyuan Farjah, Ebrahim Shiraz Univ Adv Power Elect & Elect Vehicle Lab Shiraz Iran Aalborg Univ Dept Energy Technol Aalborg Denmark

This study proposes an effective diagnosis method for single and multiple open-switch faults (OSFs) in three-phase permanent magnet synchronous motor (PMSM) drives. The proposed method is based on the real-time estimation of the three-phase motor currents using three Kalman filters (KFs). Three residual signals are defined as the differences between the three-phase measured and estimated stator currents. The averaged normalised residual signals are used as diagnostic criteria for the detection of OSFs. The proposed method accurately detects the OSFs, localises the faulty switches and effectively discriminates between the OSFs and current sensor faults. The main superiorities of the proposed KF-based method are its fast detection time and high robustness to measurement noises/errors and load variations. Moreover, the proposed method is useful for both closed-loop and open-loop PMSM drives. The proposed method can be embedded as a subroutine in the drive control unit without any hardware extension. The effectiveness of the proposed method is confirmed through extensive simulations and several hardware-in-the-loop experiments on a testbed with a 1.5 kW PMSM and dSPACE1104 control board. In addition, the real-time feasibility of the proposed method using low-cost microprocessor technology is guaranteed by testing it on TMS320F28335 from Texas Instruments (c).

关键词： synchronous motors fault diagnosis permanent magnet motors control engineering computing machine control synchronous motor drives stators Kalman filters closed loop systems three-phase motor currents Kalman filter estimated stator currents normalised residual signals OSFs faulty switches current sensor faults KF-based method fast detection time load variations open-loop PMSM drives drive control unit hardware-in-the-loop experiments real-time feasibility open-switch fault diagnosis automotive permanent magnet synchronous motor drives effective fault diagnosis method single switch faults multiple open-switch faults three-phase permanent magnet synchronous motor drives real-time estimation power 1 5 kW

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：