检索结果-内蒙古大学图书馆

IEEE International Conference on Intelligent Transportation Systems

作者： Kuan Lu Yongduan Song Wenchuan Cai Sch. of Electron. & Inf. Eng. Beijing Jiaotong Univ. Beijing China

ISBN: (纸本)9781479960798

Effective re-adhesion control is plays an important role in enhancing safe and reliable operation of high speed trains (HST). This paper presents a robust adaptive re-adhesion control strategy for HST. This control algorithm developed is not only able to attenuate wheel skid timely, but also capable of utilizing available adhesion properties to maintain preferable traction/braking performance after re-adhesion, even if the rail-wheel system exhibits significant adhesion uncertainties and nonlinearities. To achieve satisfactory slip velocity tracking, an optimal seeking strategy is introduced to provide the desired slip velocity. It is shown that the proposed strategy can automatically adjust the control torque to drive the train in the way to make it operate away from slip region but closer to the neighborhood of the optimal adhesion point, such that preferable traction/braking capability is guaranteed after re-gaining adhesion. Effectiveness of the proposed re-adhesion strategy has been confirmed by theoretical analysis and numerical simulation.

关键词： adaptive control adhesion mechanical variables control rail traffic control railway safety robust control HST operation HST safety braking performance control algorithm high speed trains rail-wheel system robust adaptive re-adhesion control strategy slip velocity traction performance wheel skid attenuation Adhesives Educational institutions Observers Rails Robustness Torque Wheels

来源：评论

学校读者我要写书评

暂无评论

Embedded system considerations for advanced algorithms in electric drives

Embedded system considerations for advanced algorithms in el...

引用

IEEE International Electric Machines and Drives Conference, IEMDC 2015

作者： Stettenbenz, Michael Vicente, Patrick Bazzi, Ali University of Connecticut StorrsCT United States

ISBN: (纸本)9781479979417

Implementation of advanced control algorithms can result in improved drive performance, reliability and efficiency, but may increase embedded system hardware requirements. Through use of tunable automated optimization methods, development of controller code for embedded systems is refined to reduce performance requirements of the target hardware. Computational costs in clock cycles per sample (CCPS), flash memory usage and total stack consumption are compared for open- and closed-loop control systems in addition to an advanced efficiency-enhancement closed-loop controller. The effects of applied optimization techniques on the embedded coding side are discussed. © 2015 IEEE.

关键词： control algorithm Electric drive embedded code processor in the Loop

来源：评论

学校读者我要写书评

暂无评论

Modeling a Cannula Insertion into a Phantom of Biological Tissue Using a Piezoelectric Actuator

Modeling a Cannula Insertion into a Phantom of Biological Ti...

引用

8th European Conference on Mechanism Science

作者： Dosaev, Marat Goryacheva, Irina Ju, Ming-Shaung Hsiao, Cheng-Hao Huang, Chih-Yuan Selyutskiy, Yury Yakovenko, Anastasia Yeh, Chien-Hsien Lomonosov Moscow State Univ Inst Mech Moscow Russia RAS Ishlinsky Inst Problems Mech Moscow Russia Natl Cheng Kung Univ Tainan Taiwan

ISBN: (纸本)9783030550639;9783030550615;9783030550608

Using different imaging techniques (primarily, magnetic resonance imaging or MRI) as guidance in robotic-assisted brain surgery becomes more and more wide-spread. One of important issues in this area is using these imaging technologies in online mode. For that, robotic devices that are compatible with MRI systems are required. In particular, conventional electric drives are not suitable;some alternatives should be used, such as piezoelectric drives (PED). In this paper, a robotic system is described intended to deliver a needle (cannula) to a given point by means of a PED. Dependence of the driving force generated by PED upon the needle speed is studied. In order to describe the contact interaction between the cannula and the soft tissue, a mathematical model of their interaction is developed based on modified Kelvin-Voigt approach. A phantom of porcine brain is manufactured. Experiments are carried out where the cannula was indented into the phantom. Based on the obtained experimental data, parameters of the mathematical model are identified. Numerical simulation of the insertion of the cannula into the soft tissue is performed, and the effect of parameters of the feedback control loop upon the cannula dynamics is analysed.

关键词： Piezoelectric actuator Mathematical model Contact characteristics control algorithm

来源：评论

学校读者我要写书评

暂无评论

Study of control Strategy on Small Power Photovoltaic Grid-connected Generation System

Study of Control Strategy on Small Power Photovoltaic Grid-c...

引用

2010 International Conference on Intelligent Computing and Cognitive Informatics (ICICCI 2010)

作者： LIU Sujuan,JING Qiufeng Henan Zhengzhou Power Supply Company State Grid Zhengzhou ChinaYANG Hai-zhu Department of Electrical Engineering and Automation Henan Polytechnic Univ.Jiaozuo China

Photovoltaic(PV) grid-connected system is the development trend of photovoltaic *** to the PV grid-connected system characteristics,analyzes the PV grid-connected inverter control and maximum power point tracking(MPPT) control strategy based on two-stage power conversion architecture,proposed a novel MPPT control algorithm,presents the design of a photovoltaic gridconnected inverse system based on the digital signal processor *** experiment results verify that the system can track the maximum power point quickly,the grid-connected current wave achieves our need and the wave of grid-connected current has the same frequency and phase as the utility voltage.

关键词： photovoltaic grid-connected system maximum power point tracking control algorithm inverter

来源：评论

学校读者我要写书评

暂无评论

The Structurally Distributed control of Cement Rotary Kiln System

The Structurally Distributed Control of Cement Rotary Kiln S...

引用

2014 International Conference on Electrical and Electronic Engineering(EEE 2014)

作者： Tie-jun CHEN Jie ZHAO School of Electric Engineering of Zhengzhou University

Through the researching of the basic causal relationship between the production process of the cement rotary kiln,this paper established a structure distributed model of cement rotary kiln,which consists of three related subsystem such as the calning zone temperature,theO 2content of rotary kiln and the temperature of decomposing *** algorithm and control algorithm were designed based on this model,the optimal control laws were determined by the estimate of the future trend of the process and control contact between *** simulation results show that this new control system is applied in cement rotary kiln process control,which possesses good stability,fault tolerance and anti-interference ability.

关键词： Cement rotary kiln Structure of distributed control Estimation method control algorithm Modeling

来源：评论

学校读者我要写书评

暂无评论

Modeling and control of an unmanned underwater vehicle using a mass moving system

引用

MODERN PHYSICS LETTERS B 2015年第6-7期29卷

作者： Byun, Seung-Woo Kim, Donghee Choi, Hyeung-Sik Kim, Joon-Young Samsung Thales Co Ltd Naval Syst R&D Ctr Gumi Gyeongsangbuk D South Korea Korea Maritime & Ocean Univ Div Mech & Energy Syst Engn Busan 606791 South Korea Korea Maritime & Ocean Univ Div Marine Equipment Engn Busan 606791 South Korea

This paper describes the mathematical modeling and control algorithms of an unmanned underwater vehicle (UUV) named Minekiller. This UUV has two longitudinal thrusters, one vertical thruster, and an internal mass moving system, which can control the pitch rate. The UUV is equipped with a movable mass for pitch control. It is different from other common UUVs, in that it can maintain a static pitch angle. The UUV's 6-DOF (Degrees of Freedom) dynamics model is derived from the hydrodynamic forces and moments acting on it. We applied these hydrodynamic coefficients to dynamic modeling for numerical simulations by MATLAB/SIMULINK (c). To compare the performance in various cases, we used a PID controller for depth and heading control. Also, the navigation controller can analyze the way-point tracking performance. These simulation results show the performance of the control algorithms and maneuvering performance of the underwater vehicle.

关键词： Unmanned underwater vehicle control algorithm mathematical model numerical simulation controller design

来源：评论

学校读者我要写书评

暂无评论

Satellite Five-axis attitude control simulation Based on BP neural network sliding mode controller

Satellite Five-axis attitude control simulation Based on BP ...

引用

2014中国制导、导航与控制学术会议

作者： Jiangchuan Qin Xiaomeng Dong Yunjie Wu Jianmin Wang Beihang University Beijing100191 China Qian Xuesen Laboratory of Space TechnologyCASTBeijing 100094China Beihang University Beihang universityBeijingChina

ISBN: (纸本)9781479946983

To deal with the current high demand for the much more complex satellite control system with high precision,the requirements for the control algorithm become more and more *** paper targeted at satellite systems with cameras that capture *** simplifying the derivation of the Kane equations,Five-axis satellite dynamic model with flexible appendage impacts is drawn,then modeling CMGs to be the implementing agency for this satellite,adding integration module,whole system simulation model is *** paper studies the optimizing parameters of sliding mode controller by BP neural network for satellite attitude control and the effect and precision can be greatly *** is verified that the intelligent algorithm applied to the parameters optimization of traditional controller can be used in satellite attitude control.

关键词： artificial satellites attitude control backpropagation neurocontrollers variable structure systems vehicle dynamics BP neural network sliding mode controller Kane equation appendage impact control algorithm five-axis satellite dynamic model integration module intelligent algorithm parameter optimization satellite control system satellite five-axis attitude control simulation Attitude control Cameras control systems Equations Mathematical model Neural networks Satellites

来源：评论

学校读者我要写书评

暂无评论

Compositional strategies for pervasive performance

Compositional strategies for pervasive performance

引用

作者： Cameron-Lewis, Laura University of Glasgow

学位级别：硕士

I have defined the term 'pervasive performance' to apply to an emerging form of artistic cultural production which blends aspects of theatre, site-specific art, and game play to create an immersive participatory experience. Pervasive: because the parameters for the performance extend beyond the conventional time frame for a theatre performance so that 'showtime' pervades beyond hours, extending into days, weeks, even months. Pervasive: because the performance extends from the stage or screen so that the performance arena becomes the real world of the daily lives of its audience. A central feature to pervasive performance is the overlapping (or erasure) of boundaries between media and their attendant conventions. Observers become participants, or players, and the 'play' is itself a world of play where reality blends with the fictional. A 'mixed' reality performance space is established because the performance space extends: into private homes, into the public domain of streets outside, and into the virtual world of internet hubs and social networks. The diegetic landscape of the performance as the world of the play is present in three places simultaneously: manifest reality, the hi-tech networked 'virtual' space, and the virtual playground of the imagination. Other terms for cultural practices, which overlap with this form, include 'Pervasive Gaming', 'Multimedia Interactive Theatre Experience' and 'Augmented Reality Game'. Each indicates a slight variation on the spectrum from computer game to theatre performance, though all denote a form of play, which extends into the daily lives of its participants. This extension takes place on both spatial and temporal axes - often using the pervasiveness of communicative technologies, such as mobile phones and internet hubs, to telematically transmit the performance 'text'. Using my own practice, compositional analysis, and first-hand observations of performance works by Blast Theory, this study explores the design proble

关键词： Pervasive performance augmented reality multimedia interactive theatre experience mixed media site-specific performance theatre dramaturgy digital theatre digital performance digital composition composition quantum physical Laura Cameron-Lewis play game-play game play gaming media diegetic virtual augmented reality interactivity freedom control algorithm

来源：评论

学校读者我要写书评

暂无评论

SENSOR PERFORMANCE OF ADVANCED PHOTOcontrol SYSTEMS

SENSOR PERFORMANCE OF ADVANCED PHOTOCONTROL SYSTEMS

引用

作者： Chen, Ling PennState University Libraries

学位级别：Master of Science

This research was designed to establish better guidelines for photocontrol systems in common daylighting applications. The guidelines are based on a statistical analysis of the correlation between two control system calibration parameters: photosensor signal and the preferred dimming level. The ideal dimming level for a controlled lighting zone was the light output required to achieve the desired target illuminance at all points within the space. A 36’ by 25’ classroom was studied. Façade orientation, different daylight delivery systems, interior shading devices, furniture and photosensor characteristics were included in this research as study variables. Energy consumption and system calibration were carefully explored with a focus on the accuracy of photosensor system’s *** a specific situation, scatter plots of the optimal dimming levels versus the photosensor signal for a specific situation numerically and graphically describe the sensor’s response to the daylight conditions. A tightly clustered optimal dimming level versus signal band indicates high correlation and better tracking of the daylight level with the space. A calibration condition that produces limited over-dimming across the work plane analysis points can be determined given the control algorithm. Points located on the calibration line at low dimming levels are suggested commissioning conditions. The background information on these points, such as the shading condition, the time of the day, sky condition and so on, can be obtained to support the commissioning process. In this work, three metrics are applied to evaluate system performance: the correlation coefficient between the sensor signal and the work plane illuminance; the Root Mean Square Error (RMSE) between the ideal dimming levels and those predicted by the calibration line, and the energy savings provided by the calibration compared to the *** to the simulation results, the S/E ratios between different interior shad

关键词： Daylight Photocontrol control algorithm RMSE Guidelines

来源：评论

学校读者我要写书评

暂无评论

Energy-saving technologies for construction machinery:a review of electro-hydraulic pump-valve coordinated system

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第5期21卷 331-349页

作者： Zhe-ming TONG Shuang-shuang WU Shui-guang TONG Yu-qing YUE Yuan-song LI Zheng-yu XU Yu-wei ZHONG State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China School of Mechanical Engineering Zhejiang UniversityHangzhou 310027China Hangcha Group Co. Ltd.Hangzhou 311305China Guangxi Yuchai Machinery Group Co. Ltd.Yulin 537005China

With the rapid development of the global economy,more and more attention has been paid to the energy conservation of construction *** hydraulic system is the key component of construction machinery,and improving its energy utilization rate has become an important means to achieve energy *** conventional valve-controlled or pump-controlled hydraulic systems of construction machinery,controllability and energy-saving performance typically cannot be considered at the same *** pump-valve coordinated system combines the energy-saving characteristics of the pump-controlled system and the high-precision and high-frequency response of the valve-controlled system,which has the potential to become a primary research direction of electro-hydraulic *** review summarizes the recent research progress in energy-saving technologies based on pump-valve coordinated ***,we discuss the structures of hydraulic systems in different categories of construction machinery,various control methods of the electro-hydraulic system,novel hydraulic hybrid energy regeneration systems,and key *** addition,future directions and challenges of the pump-valve coordinated systems are described,such as independent metering system(IMS),common pressure rail(CPR),and hybrid power source(HPS).

关键词： Construction machinery Energy saving Pump-valve coordinated systems control algorithm Hydraulic systems

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

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：