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Chinese control Conference (CCC)

作者： Qiang Zang Kaifeng Zhang Xianzhong Dai Ying Zhou Tao Li School of Information and Control Engineering Nanjing University of Information Science & Technology 210044 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China College of Automation Nanjing University of Posts and Telecommunications 210003 China

For a class of nonlinear differential-algebraic equations subsystems, whose index is one and interconnection is local measurable, the inversion control problem is studied by extending Interactor algorithm of nonlinear ordinary differential equations systems. Compared with existing results, the proposed method in this paper bears better realization because of no complex matrix transformation being needed. Firstly, the definition of right inverse systems is presented. Secondly, an extended Interactor algorithm is proposed to judge whether the controlled systems are invertable. Once the controlled systems are invertable, a physical realizable right inverse system is constructed, with which the controlled systems are made linearization and decoupled so that linear control methods can be applied. Finally, an excitation controller is designed for one synchronous generator of multi-machine power systems based on the proposed method in this paper. The simulation results illustrate the validity of the proposed control method in this paper.

关键词： Electronic mail Educational institutions Differential equations Algorithm design and analysis Power systems control engineering

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Containment control with multiple interacting leaders under switching topologies

Containment control with multiple interacting leaders under ...

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Chinese control Conference (CCC)

作者： Huiyang Liu Long Cheng Min Tan Zengguang Hou Zhiqiang Cao Ming Wang State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing Beijing CN School of Information and Electrical Engineering Shandong Jianzhu University Jinan P.R. China

In this paper, containment control for continuous-time multi-agent systems with multiple interacting leaders is investigated. According to the role each agent plays in the multi-agent team, the agents are classified into two categories: leaders and followers. The containment control problem in this paper is that the leaders converge to a desired formation and the followers move into the convex hull spanned by the leaders' final positions. A sufficient condition for containment control is that the union of the interaction graphs has a spanning tree frequently enough as the system evolves. It is shown that the followers' positions in the convex hull are dynamic due to the switching topology. The theoretical results are illustrated by some simulations.

关键词： Topology Switches Network topology Vectors Multi-agent systems Protocols

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On the achievable capacity of dual-polarized antenna systems in 3D indoor scenarios

On the achievable capacity of dual-polarized antenna systems...

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IEEE International Conference on Communications in China (ICCC)

作者： Fengxiang Wang Xiang Cheng Liuqing Yang Bo Yu Bingli Jiao School of Electronics Engineering & Computer Science Peking University Beijing China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Department of Electrical and Computer Engineering Colorado State University Fort Collins CO USA

Unlike triple-polarized antennas, dual-polarized antennas can be easily implemented into thickness limited devices and thus have received much attention recently. Dual-polarized antennas have the potential to double the channel capacity in comparison with an omnidirectional single-input single-output (SISO) system. However, in real three-dimensional (3D) scenarios, dual-polarized antennas cannot capture the arriving power from the third polarization direction, which is orthogonal to the two-dimensional (2D) polarization plane. This will lead to power loss, which may significantly affect the resultant channel capacity. By proposing a novel two-sphere single-bounced geometry-based stochastic model (GBSM) and rigorously analyzing the change of polarization after single-bounced scattering, this paper studies the impact of the power loss on the channel capacity and specifies the conditions under which the channel capacity of dual-polarized systems is even worse than that of omnidirectional SISO systems. Not only that this is the first endeavor on this subject, but also this work is of practical importance in guiding appropriate deployment of dual-polarized antennas in real 3D indoor scenarios.

关键词： Three-dimensional displays Antennas Channel capacity Vectors Signal to noise ratio Correlation Azimuth

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Social influence and spread dynamics in social networks

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Frontiers of Computer Science 2012年第5期6卷 611-620页

作者： Xiaolong ZHENG Yongguang ZHONG Daniel ZENG Fei-Yue WANG State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China Department of Management Science and Engineering Qingdao UniversityQingdao 266071China

Social networks often serve as a critical medium for information dissemination, diffusion of epidemics, and spread of behavior, by shared activities or similarities be- tween individuals. Recently, we have witnessed an explosion of interest in studying social influence and spread dynamics in social networks. To date, relatively little material has been provided on a comprehensive review in this field. This brief survey addresses this issue. We present the current significant empirical studies on real social systems, including network construction methods, measures of network, and newly em- pirical results. We then provide a concise description of some related social models from both macro- and micro-level per- spectives. Due to the difficulties in combining real data and simulation data for verifying and validating real social sys- tems, we further emphasize the current research results of computational experiments. We hope this paper can provide researchers significant insights into better understanding the characteristics of personal influence and spread patterns in large-scale social systems.

关键词： social networks spread dynamics social influence computational experiment

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A fast convergence deadlock control strategy of Petri nets based on MIP algorithm

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International Journal of Advancements in Computing Technology 2012年第17期4卷 589-598页

作者： Wang, Shouguang Wang, Dong Tan, Zhonghong Guan, Xuanxuan Wang, Chengying School of Information and Electronic Engineering Zhejiang Gongshang University Hangzhou 310018 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing China

This paper presents a deadlock prevention method for a class of flexible manufacturing systems (FMS) where deadlocks are caused by unmarked siphons in the Petri net. In order to prevent deadlock, we propose a new algorithm to forbid the bad states maximally at each iteration so that the number of reachable states comes nearest to the optimal one. First, compute a maximal unmarked siphon by using an MIP algorithm. Then, obtain a subnet based on the unmarked siphon. Next, compute all minimal siphons of the subnet and add monitors to control them. We choose the right minimal siphon to control at last by comparison of their state number. This strategy is an iterative method. With the development of this algorithm, we avoid the redundant monitors, and hence significantly improve the computational efficiency. Finally, the proposed method is illustrated by using an example.

关键词： Petri nets

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A coordination and optimization method for multi-bridge waterjet cutting processes

A coordination and optimization method for multi-bridge wate...

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42nd International Conference on Computers and Industrial engineering 2012, CIE 2012

作者： Li, Jun Sun, Qirui Dai, Xianzhong Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Ministry of Education Nanjing 210096 China

ISBN: (纸本)9781627486842

Recently, the rapidly increasing demand for cutting of large-sized flat work pieces calls for the emergence of large waterjet cutting machine tools. Multi-bridge waterjet cutting machines are one of the preferred solutions. However, there must be an overlap between the work areas of any pair of adjacent bridges on each of which a workhead with a nozzle is installed in a multi-bridge machine to ensure that no dead zones exist for cutting. It means that a pair of adjacent bridges may crash with each other over their superposed processing area and result in damages or a breakdown of the machine. It is an interference problem that a multi-bridge machine suffers from. This paper proposes a coordination policy to avoid interference, where the dimensional overlap of any pair of adjacent bridges is transformed into those of their processing time sequences. Thus, by shifting the processing time sequences to eliminate the time overlaps, the collision between the corresponding two bridges can be avoided. Subsequently, to enhance reliability of the system, a GA-based optimization algorithm incorporated with the coordination policy is designed for scheduling the multiple cutting paths of a machine to minimize the totally potential need of coordination. The validity of the presented method is confirmed by applying it into a case study. © 2012 CIE & SAIIE.

关键词： Machine tools

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An evaluation model for passenger hub under fuzzy environment

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Computer Modelling and New Technologies 2013年第4期17卷 142-152页

作者： Yun, L. Ji, Ch. Fan, H. Rail Traffic Control and Safety State Key Laboratory Beijing Jiaotong University Shangyuancun 3 Beijing China Civil and Environmental Engineering Mississippi State University 235L Walker Hall 501 Hardy Road Starkville MS United States MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology Beijing Jiaotong University Shangyuancun 3 Beijing China

This paper aims to propose a modelling framework for service quality evaluation of passenger hub under fuzzy environment, i.e., when valuators cannot quantify all criteria accurately. The research problem is to evaluate the operation status of passenger hub that maximizes the service level, including not only quantitative index but also qualitative index. A mixed-model combined the Grey Relational Analysis (GRA) and VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) has been developed to solve the problem in a fuzzy environment where both criteria and weights could be fuzzy sets. An empirical study for evaluating service quality of three passenger hubs in different times was put forth to illustrate an application of the proposed model. The results reveal a number of interesting insights into service level evaluation, namely, this study has instructive significance in management practice.

关键词： Quality of service

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Energy efficient target tracking algorithm using cooperative sensors

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Journal of systems engineering and Electronics 2012年第5期23卷 640-648页

作者： Chun Zhang Shumin Fei School of Automation Southeast UniversityNanjing 210096P.R.China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast UniversityNanjing 210096P.R.China

Target tracking is one of the applications of wireless sensor networks（WSNs）.It is assumed that each sensor has a limited range for detecting the presence of the object,and the network is sufficiently dense so that the sensors can cover the area of *** to the limited battery resources of sensors,there is a tradeoff between the energy consumption and tracking *** solve this problem,this paper proposes an energy efficient tracking *** on the cooperation of dispatchers,sensors in the area are scheduled to switch their working mode to track the *** energy consumed in active mode is higher than that in monitoring or sleeping mode,for each sampling interval,a minimum set of sensors is woken up based on the select ***,other sensors keep in sleeping *** analysis and simulation results show that the proposed algorithm provides a better performance than other existing approaches.

关键词： target tracking wireless sensor network energy consumption tracking accuracy

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Experimental Research on the Ultrasound-guided Positioning System of Microwave Ablation Surgical Robot

Experimental Research on the Ultrasound-guided Positioning S...

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IEEE International Conference on Automation and Logistics (ICAL)

作者： Duan, Xing-guang Guo, Qing-bo Liu, Tian-bo Zhu, Xiang-yu Chen, Chao Yang, Yang Intelligent Robotics Institute State Key Laboratory of Intelligent Control and Decision of Complex Systems School of Mechatronical Engineering Beijing Institute of Technology 5 Nandajie Zhongguancun Haidian 100081 China

ISBN: (纸本)9781467303644

Combined with modern imaging techniques and minimally invasive treatment techniques, microwave ablation surgeries have become one of the most effective methods in the modern comprehensive treatment of cancer. To solve the problems exist in traditional surgeries, microwave ablation surgical robot has been successfully developed. At first, this paper briefly introduces the robot auxiliary treatment process. Then analyzes the ultrasound-guided positioning system in detail. At last, the paper focuses on experimental research process such as robot localization experiment and precision experiment. The experimental results will verify the effectiveness of the robot system and the accuracy of the treatment. Meanwhile, the problems exist in the system are discussed and he future research direction is demonstrated.

关键词： Surgical Robot Ultrasound-guided localization system Microwave Ablation

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A Model of Collision-Detection for Maxillofacial Multi-arm Surgery Robot

A Model of Collision-Detection for Maxillofacial Multi-arm S...

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IEEE International Conference on Automation and Logistics (ICAL)

作者： Zhu, Xiang-yu Duan, Xing-guang Chen, Chao Liu, Tian-bo Guo, Qing-bo Intelligent Robotics Institute State Key Laboratory of Intelligent Control and Decision of Complex Systems School of Mechatronical Engineering Beijing Institute of Technology 5 Nandajie Zhongguancun Haidian 100081 China

ISBN: (纸本)9781467303644

A maxillofacial Multi-arm surgery robot is employed to assisting maxillofacial surgery, which can improve surgical precision and reduce surgeons' strain. Thus, the safety during the processing of the surgery is necessary for protecting the patient and preventing the quality of the surgery. This paper presents the development of a collision and self-collision-detection scheme, for Maxillofacial Multi-arm Surgery Robot. The method is based on modeling the arm of Multi-arm robot and the obstacle in surgery environment by simple geometric primitives (cylinders and spheres). Methods of detecting collision about the cylinders and the spheres are introduced. By resorting to the pose of cylinder or sphere which presents in the workspace, many different types of collisions are introduced. The performance of the collision-avoidance scheme is demonstrated with Multi-arm robot via experiments.

关键词： Multi-arm robot Collision Avoidance Geometric Primitives Collision Detection

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