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第三十二届中国控制会议

作者： LI Juan CHEN Xisong LI Shihua YANG Jun ZHOU Jiancheng School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationP.R.China School of Chemistry and Chemical Engineering Southeast University

ISBN: (纸本)9781479900305

This paper presents a composite disturbance rejection control strategy for high purity binary distillation column with complex characteristics,such as couplings,non-minimum phase,model mismatches and external *** goal of the controller is to get the desired top and bottom compositions in presence of both model mismatches and external *** composite controller includes neural network inverse controller(NNIC) and neural network disturbance observer(NNDOB) both using radial basis fimction network(RBFN).The inverse model of the system is identified by RBFN,whose stability is proved via the Lyapunov fimction *** a rigorous analysis is also given to show why the NNDOB can effectively suppress the *** of the proposed scheme is compared with PID and NNIC schemes in two *** feasibility, effectiveness and disturbance rejection property of the proposed method are demonstrated by the simulation studies.

关键词： Composite controller Disturbance Rejection Neural Network Disturbance Observer Binary Distillation Column.

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H∞ Static Output control of Discrete-Time Networked control systems with an Event-Triggered Scheme

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Circuits, systems, and Signal Processing 2018年第2期37卷 553-568页

作者： Yan, Shen Zhang, Guangming Li, Tao Shen, Mouquan Li, Lingchun College of Electrical Engineering and Control Science Nanjing Technology University Nanjing211816 China School of Information and Control Nanjing University of Information Science and Technology NanjingJiangsu210044 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing210096 China

This paper is devoted to the event-triggered H∞ static output feedback control of linear discrete-time networked control systems. With the help of zero-holder, a time-delay formulation is adopted to describe the even-triggered output. Resorting to Finsler lemma and time-delay techniques, a co-design framework of event-triggering communication and static output controller is established in terms of linear matrix inequalities. Meanwhile, the required H∞ performance could be ensured by the proposed framework. Two examples are supplied to verify the validity of the proposed method. © 2017, Springer Science+Business Media New York.

关键词： Networked control systems

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Extended state observer based control for ground-coupled heat pump system 27

Extended state observer based control for ground-coupled hea...

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27th Chinese control and Decision Conference, CCDC 2015

作者： Yu, Zhang Wang, Junxiao Li, Shihua School of Automation Southeast University Nanjing Jiangsu Province China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education China

ISBN: (纸本)9781479970179

This paper aims to investigate an extended state observer (ESO) based control approach for the ground-coupled heat pump system (GCHP). As GCHP system has strong disturbances, a feasible approach of disturbance rejection should be proposed necessarily. ESO is employed to estimate the disturbance and compensate it to the controller to eliminate effects of the disturbance. By using ESO-based control and comparing with traditional control method, a better control performance is obtained through simulation verification. © 2015 IEEE.

关键词： disturbance rejection ESO GCHP simulation

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Weighted Group-Consensus of Multi-Agent systems with Bipartite Topologies 28

Weighted Group-Consensus of Multi-Agent Systems with Biparti...

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第28届中国控制与决策会议

作者： He Ying-gao Wang Xiang-yu Wuxi Institute of Arts & Technology School of Automation Southeast UniversityNanjing 210096China& Key Laboratory of Measurement and Control of Complex Systems of EngineeringMinistry of Education

ISBN: (纸本)9781467397155

This paper studies weighted group-consensus of multi-agent systems with bipartite topologies through adjusting the proportion of the current states and the delay states in the control algorithms.A sufficient condition for the convergence to a weighted group-consensus is proposed by adopting the generalized Nyquist stability criterion and the Gerschgorin disk theorem This condition is able to enlarge the upper bound on the maximum time-delay of weighted *** of the proposed result is demonstrated through numerical simulations.

关键词： Multi-agent systems group-consensus Nyquist criterion Gerschgorin disk theorem

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An optimal trajectory planning algorithm for T-shaped acceleration curve with non-zero acceleration at the beginning and end

An optimal trajectory planning algorithm for T-shaped accele...

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2022 Chinese Automation Congress, CAC 2022

作者： Luo, Yongxu Yahui, Gan Xianzhong, Dai SE University Key Laboratorty of Measurement and Control of Complex Systems of Engineering Ministry School of Automation NanJing China

ISBN: (纸本)9781665465335

In order to solve the problem that T-type trajectory planning curve can not completely replace polynomial trajectory planning,this paper proposes an S-type programming algorithm based on the optimization algorithm with T-type acceleration. The algorithm solves the complex and cumbersome problem of time planning of T-shaped acceleration and deceleration curve with non-zero acceleration and velocity at the beginning and end. Taking into account the characteristics of fast acceleration of trajectory planning curve, it can not only solve the case where the initial and end velocities are not zero, but also solve the case where the initial and end accelerations are not zero. The algorithm is based on the analysis of the characteristics of acceleration stage, constant speed stage and deceleration stage. When the highest speed of the curve is determined, the time of all speed segments is also determined. The concept of maximum reachable speed of trajectory is proposed. The complex multivariate nonlinear programming is transformed into a single convex function. The algorithm is simplified by using the symmetry of the variation forms in acceleration stage and deceleration stage. The maximum achievable velocity is solved by dichotomy, Newton iterative method and gradient descent method. The experiment shows that the solving efficiency of Newton iterative method is 40% higher than that of dichotomy method. Compared with the quintic polynomial programming algorithm, the overall planning time is reduced by 9.6% and the tracking error is reduced by 15.9%. © 2022 IEEE.

关键词： Acceleration

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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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Topological edge state analysis of hexagonal phononic crystals

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Acta Mechanica Sinica 2022年第3期38卷 78-85,I0002页

作者： Kai Zhang Fang Hong Je Luo Zichen Deng School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072China MIIT Key Laboratory of Dynamics and Control of Complex Systems Northwestern Polytechnical UniversityXi'an 710072China

In this study,we propose valley phononic crystals that consist of a hexagonal aluminum plate with six chiral arrangements of *** phononic crystals were introduced into a topological insulator(TI)system to produce topologically protected edge waves(TPEW s)along the topological *** implementation of chiral topological edge states is different from the implementation of topological edge states of systems with *** the conventional breaking of mirror symmetry,a new complete band with topological edge modes gap was opened up at the Dirac point by tuning the difference in lengths of the ligaments in the chiral unit *** investigated the dispersion properties in chiral systems and applied the dispersion properties to waveguides on the interfaces to achieve designable route ***,we simulated the robust propagation of TPEWs in different routes and demonstrated their immunity to backscattering at ***,the existence of the valley Hall effect in chiral systems was *** study findings may lead to the further study of the topological states of chiral materials.

关键词： Phononic crystals Topologically protected edge waves Chiral unit cells Topological insulator

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Accurate and straightforward symplectic approach for fracture analysis of fractional viscoelastic media

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Applied Mathematics and Mechanics(English Edition) 2022年第3期43卷 403-416页

作者： Chenghui XU Sen LENG Zhenhuan ZHOU Xinsheng XU Zichen DENG MIIT Key Laboratory of Dynamics and Control of Complex Systems Department of Engineering MechanicsNorthwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Structure Analysis of Industrial Equipment Department of Engineering MechanicsDalian University of TechnologyDalian 116024Liaoning ProvinceChina

An accurate and straightforward symplectic method is presented for the fracture analysis of fractional two-dimensional(2D)viscoelastic *** fractional Kelvin-Zener constitutive model is used to describe the time-dependent behavior of viscoelastic *** the framework of symplectic elasticity,the governing equations in the Hamiltonian form for the frequency domain(s-domain)can be directly and rigorously *** the s-domain,the analytical solutions of the displacement and stress fields are constructed by superposing the symplectic eigensolutions without any trial function,and the explicit expressions of the intensity factors and J-integral are derived *** studies are provided to validate the accuracy and effectiveness of the present solutions.A detailed analysis is made to reveal the effects of viscoelastic parameters and applied loads on the intensity factors and J-integral.

关键词： symplectic approach viscoelastic material fractional Kelvin-Zener model crack fracture parameter

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Elastic Wave Propagation in Lattice Metamaterials with Koch Fractal

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Acta Mechanica Solida Sinica 2020年第5期33卷 600-611页

作者： Pengcheng Zhao Kai Zhang Zichen Deng School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710072China MIIT Key Laboratory of Dynamics and Control of Complex Systems Northwestern Polytechnical UniversityXi’an710072China

In this study,the wave propagation properties of lattice metamaterials with Koch fractal structures are investigated in terms of band structures and directional wave *** analytical models of lattice metamaterials are established using the finite element method,and the dispersion relation is solved using the Bloch’s *** band structures of the lattice metamaterials with different numbers of iterations are studied,and the group velocities at a selected frequency are calculated to analyze the directional wave propagation ***,dynamic responses of the finite structures are calculated using commercial finite element software to verify the band gaps and directional wave propagation behaviors in the lattice *** results show that multiple and low band gaps are present in the lattice materials with various geometric parameters of the Koch fractal,and the position of the lowest band gap decreases as the number of iterations *** results indicate the potential applications of lattice metamaterials with Koch fractals for vibration isolation and multi-functional design.

关键词： Elastic wave propagation Lattice metamaterial Koch fractal Band gap Group velocity

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Stochastic DoS Attack Allocation Against Collaborative Estimation in Sensor Networks

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IEEE/CAA Journal of Automatica Sinica 2020年第5期7卷 1225-1234页

作者： Ya Zhang Lishuang Du Frank L.Lewis School of Automation Southeast Universityand also with the Key Laboratory of Measurement and Control of Complex Systems of EngineeringMinistry of EducationNanjing 210096China University of Texas at Arlington Research Institute Fort WorthTX 76118 USA IEEE

In this paper,denial of service(DoS)attack management for destroying the collaborative estimation in sensor networks and minimizing attack energy from the attacker perspective is *** the communication channels between sensors and a remote estimator,the attacker chooses some channels to randomly jam DoS attacks to make their packets randomly dropped.A stochastic power allocation approach composed of three steps is ***,the minimum number of channels and the channel set to be attacked are ***,a necessary condition and a sufficient condition on the packet loss probabilities of the channels in the attack set are provided for general and special systems,***,by converting the original coupling nonlinear programming problem to a linear programming problem,a method of searching attack probabilities and power to minimize the attack energy is *** effectiveness of the proposed scheme is verified by simulation examples.

关键词： Attack allocation denial of service(DoS)attack packet loss remote estimation sensor networks

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