检索结果-内蒙古大学图书馆

Guest Editorial for Special Issue on Cyber-Physical Systems

IEEE/CAA Journal of Automatica Sinica 2015年第3期2卷 233-234页

作者： Youxian Sun Xinping Guan Jiming Chen Yilin Mo Zhejiang University the Chinese Academy of Engineering the Institute of Industrial Process Control and the National Engineering Research Center of Industrial Automation Zhejiang University Department of Automation Shanghai Jiao Tong University University Research Management Office Shanghai Jiao Tong University the Key Laboratory of Systems Control and Information Processing Ministry of Education of China the prestigious Innovative Research Team of the National Natural Science Foundation of China(NSFC) Department of Control Science and Engineering group of Networked Sensing and Control in the State Key laboratory of Industrial Control Technology Institute of Industrial Process Control at Zhejiang University the School of Electrical and Electronic Engineering at Nanyang Technological University

Ⅰ.Introduction CYBER-PHYSICAL system is a system of collaborating computational elements to control physical *** coordination and the tight link between computational,virtual and physical resources in cyber-physical system will have a pervasive effect on our everyday *** development of cyber-physical system will create new opportunities for the introduction of services that will enhance the quality of life

关键词： for WSAN Guest Editorial for Special Issue on Cyber-Physical Systems of into on WSN is

来源：评论

学校读者我要写书评

暂无评论

Robust Vehicle Localization with GPS Dropouts

Robust Vehicle Localization with GPS Dropouts

引用

International Conference on Intelligent and Advanced Systems

作者： Salman Ali Shaukat Muhammad Arif Umar Iqbal Bhatti Khalid Munawar Aamer Iqbal Bhatti Ubaid M. Al-Saggaf Center of Excellence in Intelligent Engineering Systems King Abdulaziz University Department of Computer Science Umm-Alqura University Department of Aeronautics and Astronautics Institute of Space Technology Control and Signal Processing Research Group Capital University of Science and Technology

ISBN: (纸本)9781509008469

Vehicle navigation systems rely on the correct positioning information and GPS is the best solution. However, in situations of GPS outage, like in tunnels and dense woods, the vehicle can lose track quickly. Modern vehicle navigation systems are mostly based on the vehicle dynamics;proprietary algorithms keep navigating for quite some time. But these solutions are expensive and add much to a vehicle's cost. This paper proposes a Kalman filter based dead-reckoning algorithm that fuses GPS information with the orientation information from a cheap IMU/INS, and the vehicle's speed accessed from its ECU. This low-cost system uses GPS and IMU/INS in a loosely coupled manner along with vehicle's speed and keeps supplying a quite accurate position information with GPS outage for significantly long intervals. With proper tuning and initialization, the proposed scheme has a potential to keep working in a completely GPS-denied situation.

关键词： Navigation GPS IMU/INS Dead-reckoning

来源：评论

学校读者我要写书评

暂无评论

A Two-Step Fault Diagnosis Framework for Rolling Element Bearings with Imbalanced Data

A Two-Step Fault Diagnosis Framework for Rolling Element Bea...

引用

International Conference on Ubiquitous Robots and Ambient Intelligence

作者： Yuan Lan Weiwei Zong Xiaojian Ding Xiaoyan Xiong Xiaohang Han Jiahai Huang Bing Ma Key Laboratory of Ministry of Education in Advance Transducers and Intelligent Control System Institute of Mechatronics Engineering under School of Mechanical Engineering Taiyuan University of Technology Department of Computer Science Wayne State University Science and Technology on Information Systems Engineering Laboratory The Second Research Institute of China Electronic Technology Group Corporation

ISBN: (纸本)9781509008223

Rolling element bearings constitute the key parts on rotating machinery and their fault diagnosis are of great importance. In this paper, a novel Two-Step fault diagnosis framework is proposed to diagnose the status of rolling element bearings with imbalanced data. The Wavelet Packet Transform (WPT) is used to determine the feature vectors. 16-dimensional wavelet packet node energies were extracted from the original datasets as the feature vectors prepared to input to the classifiers. Next, our proposed framework consists of two steps for the fault diagnosis, where Step One makes use of Weighted Extreme Learning Machine (weighted ELM) in an effort to classify the normal or abnormal categories, and Step Two further diagnoses the underlying anomaly in details. The effectiveness of our proposed approach is testified on the raw data collected from the rolling element bearing experiments conducted in our institute, and the empirical results showed that our approach is really fast and can achieve the diagnosis accuracies more than 95%.

关键词： Two-Step fault diagnosis framework Weighed ELM ELM Bearing fault diagnosis

来源：评论

学校读者我要写书评

暂无评论

A Two-Step Fault Diagnosis Framework for Rolling Element Bearings with Imbalanced Data

A Two-Step Fault Diagnosis Framework for Rolling Element Bea...

引用

2016 13th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Yuan Lan Weiwei Zong Xiaojian Ding Xiaoyan Xiong Xiaohang Han Jiahai Huang Bing Ma Key Laboratory of Ministry of Education in Advance Transducers and Intelligent Control System Institute of Mechatronics Engineering under School of Mechanical EngineeringTaiyuan University of Technology Department of Computer Science Wayne State University Science and Technology on Information Systems Engineering Laboratory The Second Research Institute of China Electronic Technology Group Corporation

Rolling element bearings constitute the key parts on rotating machinery and their fault diagnosis are of great importance. In this paper, a novel Two-Step fault diagnosis framework is proposed to diagnose the status of rolling element bearings with imbalanced data. The Wavelet Packet Transform(WPT) is used to determine the feature vectors. 16-dimensional wavelet packet node energies were extracted from the original datasets as the feature vectors prepared to input to the ***, our proposed framework consists of two steps for the fault diagnosis, where Step One makes use of Weighted Extreme Learning Machine(weighted ELM) in an effort to classify the normal or abnormal categories, and Step Two further diagnoses the underlying anomaly in details. The effectiveness of our proposed approach is testified on the raw data collected from the rolling element bearing experiments conducted in our institute,and the empirical results showed that our approach is really fast and can achieve the diagnosis accuracies more than 95%.

关键词： Two-Step fault diagnosis framework Weighed ELM ELM Bearing fault diagnosis

来源：评论

学校读者我要写书评

暂无评论

Blending for H∞ performance: A group theoretic approach 8

Blending for H∞ performance: A group theoretic approach

引用

8th IFAC Symposium on Robust control Design, ROCOND 2015

作者： Szabó, Z. Bokor, J. Schipp, F. Institute for Computer Science and Control Hungarian Academy of Sciences Kende u. 13-17 Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences MTA-BME Control Engineering Research Group Hungary

In order to design efficient algorithms that work on the set of controllers that fulfill a given property e.g., stability or a norm bound, it is important to have an operation that preserves that property, i.e., a suitable blending method. Concerning stability, a traditional approach is to use the Youla parametrization and the corresponding parameters as a starting point. While this method guarantees stabilizability as the invariant property for the fairly large class of strictly proper plants, there are also other solutions to the problem. The authors already provide a detailed analysis for feedback stability placing the controller blending problem in a general setting by pointing to the basic global geometric structures that are related to well-posedness and feedback stability. In this paper these efforts are continued and the group structure corresponding to performance problems, e.g., those related to a suboptimal H∞ design, is presented. Besides its educative value the presentation provides a possible tool for the algorithmic development. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Blending

来源：评论

学校读者我要写书评

暂无评论

Set-Based Actuator Reconfguration Analysis for the Integrated control of Lateral Vehicle Dynamics

Set-Based Actuator Reconfguration Analysis for the Integrate...

引用

作者： Gaspar, Péter Németh, Balázs Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary

The paper proposes a set-based analysis of steering and braking actuator integration in order to improve the reconfguration strategy of lateral vehicle control. The purpose is to examine the improvement possibilities of the stabilization abilities through actuator integration. The results are applied to the theoretical basis of the actuator selection strategy in the reconfgurable control. In the analysis the computation method of the maximum controlled Invariant Sets based on the nonlinear Sum-of-Squares (SOS) programming is used. The analysis considers the nonlinear characteristics of the tyre, the velocity and the tyre-road conditions which signifcantly determine the stability regions in the lateral dynamics. Thus, the resulting sets provide information about the stabilization abilities of the actuators for the entire vehicle system. The examination of the integrated actuation in the reconfguration strategy is illustrated through various vehicle manoeuvres. © 2015

关键词： Actuators

来源：评论

学校读者我要写书评

暂无评论

Design of low confict cruise control for safety critical vehicle interactions

Design of low confict cruise control for safety critical veh...

引用

作者： Németh, Balázs Gaspar, Péter Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group Budapest Hungary

In the paper a speed profle design strategy to avoid safety conficts in vehicle interactions is proposed. A fault-tolerant strategy for an intersection scenario is presented, which handles the malfunction of the trafc control elements, such as trafc lights. The signals obtained from the road and vehicles in the trafc are handled jointly with the dynamic equations of the vehicle and built into the control design of speed. The look-ahead cruise control method is able to guarantee safety and fnd an energy-efcient solution with the incorporation of road grade and speed limits. The efciency of the method is demonstrated through simulation examples. © 2015

关键词： Roads and streets

来源：评论

学校读者我要写书评

暂无评论

Robust reconfigurable control for in-wheel electric vehicles 9

Robust reconfigurable control for in-wheel electric vehicles

引用

9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, SAFEPROCESS 2015

作者： Gáspár, Péter Bokor, József Mihály, András Szabó, Zoltán Fülep, Timea Szauter, Ferenc Institute for Computer Science and Control Hungarian Academy of Sciences MTA-BME Control Engineering Research Group Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Research Center of Vehicle Industry Széchenyi István University Gyór Hungary

The paper presents a fault tolerant reconfigurable control method for vehicles driven by four in-wheel electric motors and a steering system. The aim of the design is to realize robust velocity and road trajectory tracking even under challenging driving conditions or actuator failures. The vehicle is operated solely with the in-wheel motors, thus steering intervention is only applied in case of skidding or a failure of an electric motor. The reconfigurable control is realized based on Linear Parameter Varying (LPV) framework, using the specific characteristics of the in-wheel motors of fast and accurate torque control. The operation of the designed control system is demonstrated in a CarSim simulation environment. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Robust control

来源：评论

学校读者我要写书评

暂无评论

Fault detection by backwards analysis in coloured workflow nets 5

Fault detection by backwards analysis in coloured workflow n...

引用

5th International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SIMULTECH 2015

作者： Ganishev, Vasilii Fengler, Olga Fengler, Wolfgang Department of Applied Mathematics National Research University Moscow Power Engineering Institute Moscow Russia Faculty of Computer Science and Automation Computer Architecture Group TU Ilmenau Ilmenau Germany

ISBN: (纸本)9789897581205

The increasing complexity of the business processes requires automated methods for trouble-shooting and debugging of the process model in operation. This paper proposes mechanism of fault detection based on the concept of backwards reachability for the coloured workflow nets. The formal verification methods defined for coloured Petri nets such as state space method or place invariants declaration suffer from fast-growing computational complexity. The article offers the set of firing rules for backwards token-play on coloured workflow net. This method helps to detect resource-related failures of the two most common types: "the missing arc" fault (the resource was not initialized) and "wrong expression fault" (there is no proper resource).

关键词： Fault detection

来源：评论

学校读者我要写书评

暂无评论

A review on effects of the atmospheric turbulence on laser beam propagation — An analytic approach

A review on effects of the atmospheric turbulence on laser b...

引用

International Symposium on Communication Systems, Networks and Digital Signal Processing, CNSDSP

作者： Mircea Hulea Xuan Tang Zabih Ghassemlooy Sujan Rajbhandari Faculty of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania Optical Communications Research Group Northumbria University Newcastle United Kingdom Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian China School of Computing Electronics and Mathematics Coventry University United Kingdom

ISBN: (纸本)9781509025275

The main effects of atmospheric turbulence on the laser beams propagation are scintillation, beam wandering, and phase front distortion. The first two can be compensated simply by using aperture averaging, whereas the later, which is of high importance in high data rates free space optics communications, is much more complex. This paper gives a review of principal analytical methods used to simulate and characterize the optical beam propagation through the turbulence channel focussing on phase front distortion. The paper presents simple models suitable for computer simulations of beam wandering and scintillation. This is followed by more complex theoretical approaches in analysing the turbulence induced phase front distortion and the calculation of the mutual coherence function of partially coherent beams propagating through an inhomogeneous medium. The theoretical analysis of beam coherence and phase front distortion due to turbulence represents the first step for elaboration of the mitigation methods.

关键词： Laser beams Optical beams Atmospheric modeling Phase distortion Optical distortion Refractive index

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：