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48th Annual Conference of the IEEE Industrial Electronics Society, IECON 2022

作者： Wang, Zhe Li, Chi Liu, Jiye Zheng, Zedong Tsinghua University State Key Lab of Control and Simulation of Power Systems and Generation Equipments Beijing China

ISBN: (数字)9781665480253

ISBN: (纸本)9781665480253

Dual active bridge is a promising isolated bidirectional DC/DC converter which has attracted more and more attention due to its advantages of zero-voltage switching, great voltage regulation ability, high power density, and fast dynamic response. However, the DC bias problem is seldom mentioned, which may lead to system instability and decreased efficiency. Besides, whether the converter can realize soft switching in the dynamic process is unclear. This paper proposed a novel phase-shift loading mode which can not only realize the DC bias elimination but also achieve zero voltage switching (ZVS) during a transient state. Finally, a 4.5 kW prototype is built and experimental results are provided to verify the conclusion. © 2022 IEEE.

关键词： Zero voltage switching

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Commutation Failure Mitigation Method Based on Improved Commutation Area in HVDC system 8

Commutation Failure Mitigation Method Based on Improved Comm...

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8th IEEE International Conference on Advanced Power System Automation and Protection, APAP 2019

作者： Wang, Haozong Dong, Xinzhou Tsinghua University State Key Lab of Control and Simulation of Power Systems and Generation Equipment Beijing China

ISBN: (纸本)9781728117225

Commutation failure (CF) is one of the major concerns in high-voltage direct current (HVDC) transmission system. Of many methods to mitigate CF, advancing firing angle is preferred one since it can be easily implemented in current HVDC controllers without extra hardware modification. However, methods in previous works either lack for quantitative analysis or based on much strong hypothesis. In this paper, we propose a novel CF mitigation method based on improved commutation area. The salient feature of proposed strategy is that DC current is not considered as a constant under fault conditions. Simulations on PSCAD/EMTDC software demonstrate the good performance of proposed method. © 2019 IEEE.

关键词： Electric commutation

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Boosting Black-Box Adversarial Attacks with Meta Learning 41

Boosting Black-Box Adversarial Attacks with Meta Learning

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第41届中国控制会议

作者： Junjie Fu Jian Sun Gang Wang Key Lab of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Deep neural networks(DNNs) have achieved remarkable success in diverse ***,it has been demonstrated that DNNs are very vulnerable to adversarial examples even in black-box settings.A large number of black-box attack methods have been proposed to in the ***,those methods usually suffer from low success rates and large query counts,which cannot fully satisfy practical *** this paper,we propose a hybrid attack method which trains meta adversarial perturbations(MAPs) on surrogate models and performs black-box attacks by estimating gradients of the *** method uses the meta adversarial perturbation as an initialization and subsequently trains any black-box attack method for several ***,the MAPs enjoy favorable transferability and universality,in the sense that they can be employed to boost performance of other black-box adversarial attack *** experiments demonstrate that our method can not only improve the attack success rates,but also reduces the number of queries compared to other methods.

关键词： Deep neural networks adversarial examples black-box attack meta adversarial perturbation transferability

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Tracking a high-dimensional active leader of switching multi-agent systems with communication delays

Tracking a high-dimensional active leader of switching multi...

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作者： Tang, Yutao Hong, Yiguang Key Lab of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9789881725592

This paper considers a target tracking problem, and the dynamics of the target regarded as an active leader is given in a general form of linear system. The multi-agent network contains communication delays and experiences switching interconnection. A distributed estimator is designed for each agent to obtain the unmeasurable state variables of the dynamic leader, and then a distributed feedback control law is developed to achieve the tracking. With constructing a common Lyapunov function, a sufficient condition is given to guarantee that each agent can track the active leader. Moreover, the input-to-state stability (ISS) is obtained for time-delay system in a disturbed environment. © 2011 Chinese Assoc of Automati.

关键词： Time delay

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Adaptive tracking control of linear systems to periodic target with set-valued information

Adaptive tracking control of linear systems to periodic targ...

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作者： Zhao, Yanlong Guo, Jin Zhang, Ji-Feng Key Lab of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9789881725592

This paper studies the adaptive control for linear systems with set-valued observations to track given periodic target. Based on the system parameters, accessorial parameters with the same order as tracking target is introduced and estimated. Consider the system parameters are unknown and set-valued observations can supply only limit information each time, we construct a two-scale adaptive control algorithm. Each control input is designed at the large time scale and last for a holding time (small scale), during which the parameter estimation algorithm is constructed. From the estimate of accessorial parameters, the control signal is updated at the large time scale by the certainty equivalence principle. As the holding time goes to infinity, the algorithm can be proved to be asymptotically efficient in a certain sense. Meanwhile, the adaptive tracking algorithm is shown to be asymptotically optimal. A numerical example is given to demonstrate the effectiveness of the algorithms and the main results obtained. © 2011 Chinese Assoc of Automati.

关键词： Linear systems

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Advancements in mass spectrometry-based glycoproteomics and glycomics

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National Science Review 2016年第3期3卷 345-364页

作者： Haojie Lu Ying Zhang Pengyuan Yang Department of Systems Biology for Medicine School of Basic Medicine and Institutes of Biomedical SciencesFudan University Key Lab of Glycoconjugate of Ministry of Health and Birth Control Fudan University Department of Chemistry Fudan University

Protein N-glycosylation plays a crucial role in a considerable number of important biological *** studies on glycoproteomes and glycomes have already characterized many glycoproteins and glycans associated with cell development, life cycle, and disease progression. Mass spectrometry(MS) is the most powerful tool for identifying biomolecules including glycoproteins and glycans, however, utilizing MS-based approaches to identify glycoproteomes and glycomes is challenging due to the technical difficulties associated with glycosylation analysis. In this review, we summarize the most recent developments in MS-based glycoproteomics and glycomics, including a discussion on the development of analytical methodologies and strategies used to explore the glycoproteome and glycome, as well as noteworthy biological discoveries made in glycoproteome and glycome research. This review places special emphasis on China, where scientists have made sizeable contributions to the literature, as advancements in glycoproteomics and glycomincs are occurring quite rapidly.

关键词： mass spectrometry glycoproteomics glycomics

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Agent Transformation of Bayesian Games

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IEEE Transactions on Automatic control 2022年第11期67卷 5793-5808页

作者： Wu, Yuhu Le, Shuting Zhang, Kuize Sun, Xi-Ming Dalian University of Technology Key Lab. of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education School of Control Science and Engineering Dalian116024 China Technical University of Berlin Control Systems Group Department of Electrical Engineering and Computer Science Berlin10623 Germany

A new transformation that converts a Bayesian game to a so-called ex-ante agent game (a normal-form game) is proposed. Differently from the existing transformation proposed by R. Selten that changes a Bayesian game to an interim agent game (also a pure normal-form game), we prove that the new transformation preserves potentiality. In addition, there is a nonpotential Bayesian game whose ex-ante agent game is potential. We also prove that there is one-to-one correspondence between pure Bayesian Nash equilibria (BNE) of Bayesian games (if one exists) and pure Nash equilibria (NE) of the resulting ex-ante agent games. Then, we provide a sufficient and necessary condition for a Bayesian game to have an ex-ante agent potential game. By using these results, one can transform pure BNE seeking in Bayesian games to pure NE seeking in their ex-ante agent games [by using the potential functions of the ex-ante agent games (if one exists)], where previously pure BNE seeking in Bayesian games by using potential functions can only be done in Bayesian potential games (BPGs). Particularly, we prove for two-player games that BPGs are exactly the Bayesian games having ex-ante agent potential games. Furthermore, by using the semi-tensor product of matrices, a potential equation for finite Bayesian games is developed. Based on the potential equation, algorithms for verifying potentiality and for searching pure BNE in finite Bayesian games are designed. Finally, the results are applied to a routing problem with incomplete information. © 1963-2012 IEEE.

关键词： Electric potential

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A Resilient Data-Driven controller Against DoS Attacks 41

A Resilient Data-Driven Controller Against DoS Attacks

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第41届中国控制会议

作者： Wenjie Liu Jian Sun Gang Wang Jie Chen Key Lab of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center Department of Control Science and Engineering Tongji University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

This paper is concerned with the stabilization problem of linear time-invariant systems under Denial-of-Service(DoS)***,system matrices are unknown,and only some input-output trajectories collected from off-line experiments are ***,in the model-based case,it has been proven that systems equipped with a predictor-based state feedback controller achieve resilience against DoS ***,this is difficult or even impossible to be implemented in the absence of a system model,thus leading to resilient control challenging in the data-based *** maintain resilience against DoS attacks in the data-based case,a data-driven model predictive control(MPC) scheme is proposed such that future system input-output trajectories can be obtained by solving a data-dependent optimal *** this scheme,a data-driven resilient control strategy is developed such that the system achieves the same level of resilience of the DoS attacks as the model-based ***,a numerical example is given to validate the effectiveness of the proposed method.

关键词： Denial-of-service attack data-driven control model predictive control input-to-state stability

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The active disturbance rejection control for a class of MIMO block lower-triangular system

The active disturbance rejection control for a class of MIMO...

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作者： Xue, Wenchao Huang, Yi Key Lab. of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9789881725592

This paper studies the control problem for a class of multiple-input multiple-output (MIMO) lower-triangular systems which have uncertain dynamics and disturbance. The active disturbance rejection control (ADRC) is designed to achieve two objects: 1). the convergence of the closed-loop system;2). the performance of the closed-loop system can be controlled to be close to the reference system by tuning the bandwidth of Extended state observer (ESO). © 2011 Chinese Assoc of Automati.

关键词： Closed loop systems

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Color object tracking in five degrees of freedom stereo vision system

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content Technology and its Applications 2012年第20期6卷 43-52页

作者： Xin, Du Xiaoguang, Zhao Yu, Huang Jingjing, Ye School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Lab. of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China

From the view of combination of stereo vision and robot control, an active stereo vision for object tracking and location system is built to work on flexible manufacturing system. A method based on local HSV image and shape of object to recognize object is used for robot tracking. After the color segment, use the knowledge of shape of objects to recognize objects. And a technique for camera calibration based on plane square is proposed. It only requires the camera to observe a square at two (or more) different unknown orientations. Use the result of object recognize and camera calibration the robot can position and track the object. At the last of the paper, the results of object tracking experiments prove that the method is correct.

关键词： Stereo vision

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