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作者： Yong Qiang Shumin Fei Liuwen Li Key Laboratory of Measurement and Control of CSE(Ministry of Education) School of Automation Southeast University School of Computer Engineering Jinling Institute of Technology

In a social environment, there is a natural mutual force between people. This paper proposes a method for detecting group abnormal behavior based on the potential field method. The movement of a pedestrian is described as the movement towards the target under the combined action of several forces. Forces on pedestrians include the attractive force for themselves and the repulsive force between pedestrians. By calculating the resultant force between them, the behavior of pedestrians is judged according to a set threshold. It is verified through experiments on public data sets that our method has high accuracy and robustness.

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Distributed Event-Triggered Algorithms for Finite-Time Privacy-Preserving Quantized Average Consensus

arXiv

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arXiv 2021年

作者： Rikos, Apostolos I. Charalambous, Themistoklis Johansson, Karl H. Hadjicostis, Christoforos N. Division of Decision and Control Systems KTH Royal Institute of Technology StockholmSE-100 44 Sweden Department of Electrical Engineering and Automation Aalto University Espoo02150 Finland Department of Electrical and Computer Engineering University of Cyprus Nicosia1678 Cyprus

—In this paper, we consider the problem of privacy preservation in the average consensus problem when communication among nodes is quantized. More specifically, we consider a setting where some nodes in the network are curious but not malicious and they try to identify the initial states of other nodes based on the data they receive during their operation (without interfering in the computation in any other way), while some nodes in the network want to ensure that their initial states cannot be inferred exactly by the curious nodes. We propose two privacy-preserving event-triggered quantized average consensus algorithms that can be followed by any node wishing to maintain its privacy and not reveal the initial state it contributes to the average computation. Every node in the network (including the curious nodes) is allowed to execute a privacy-preserving algorithm or its underlying average consensus algorithm. In the first algorithm, each node initially injects a quantized offset and continues injecting offsets every time a certain event-triggered condition is satisfied, such that, after a finite number of events, the accumulated injected offset becomes equal to zero. In the second algorithm, each node injects a quantized offset to its out-neighboring nodes at the algorithm’s initialization, such that the accumulated sum is equal to zero. Under certain topological conditions, both algorithms allow the nodes who adopt privacy-preserving protocols to preserve the privacy of their initial quantized states and at the same time to obtain, after a finite number of steps, the exact average of the initial states while processing and transmitting quantized information. Illustrative examples demonstrate the validity and performance of our proposed algorithms. A motivating application is presented in which smart meters in a smart grid collect real-time demands for power in a neighborhood and the aggregated demand is distributively computed in a privacy-preserving manner. © 20

关键词： Electric power transmission networks

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Depth-Aware Multi-Modal Fusion for Generalized Zero-Shot Learning

Depth-Aware Multi-Modal Fusion for Generalized Zero-Shot Lea...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Weipeng Cao Xuyang Yao Zhiwu Xu Yinghui Pan Yixuan Sun Dachuan Li Bohua Qiu Muheng Wei Guangdong Laboratory of Artificial Intelligence and Digital Economy (Shenzhen) Shenzhen China National Engineering Laboratory for Big Data System Computing Technology Shenzhen University Shenzhen China College of Computer Science and Software Engineering Shenzhen University Shenzhen China Stony Brook University New York United States Research Institute of Trustworthy Autonomous Systems Southern University of Science and Technology Shenzhen China Department of Computer Science and Engineering Southern University of Science and Technology Shenzhen China ZhenDui Industry Artificial Intelligence Co. Ltd Shenzhen China Department of Automation Shanghai Jiao Tong University Shanghai China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai China

ISBN: (数字)9798331527471

ISBN: (纸本)9798331527488

Realizing Generalized Zero-Shot Learning (GZSL) based on large models is emerging as a prevailing trend. However, most existing methods merely regard large models as black boxes, solely leveraging the features output by the final layer while disregarding potential performance enhancements from other layers. Indeed, numerous researchers have visually depicted variations in the features learned across different layers of neural networks. Motivated by this observation, we propose a Vision Transformer (ViT)-based GZSL method named Depth-Aware Multi-Modal ViT (DAM2ViT), which exploits multi-level features of ViT. DAM2ViT incorporates a multi-modal interaction block to align semantic information of categories across multiple layers, thereby augmenting the model's capacity to learn associations between visual and semantic spaces. Extensive experiments conducted on three benchmark datasets (i.e., CUB, SUN, AWA2) have showcased that DAM2ViT achieves competitive results compared to state-of-the-art methods.

关键词： Visualization Adaptation models Semantics Zero shot learning Neural networks Termination of employment Transformers Market research Sun Optimization

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Variable-Structure Interval-Based Duffing Oscillator

Variable-Structure Interval-Based Duffing Oscillator

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IEEE International Conference on Electronics and Nanotechnology (ELNANO)

作者： Roman Voliansky Borys Kuznetsov Ihor Bovdui Yuliya Averyanova Ivan Ostroumov Olha Sushchenko Maksym Zaliskyi Oleksandr Solomentsev Kostiantyn Cherednichenko Viktoriia Ivannikova Olena Sokolova Yurii Bezkorovainyi Tatyana Nikitina Oleksii Holubnychyi Department of Electromechanical Systems Automation and Electric Drives National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” Kyiv Ukraine Department of magnetism of technical objects Anatolii Pidhornyi Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine Kharkiv Ukraine Air Navigation Systems Department National Aviation University Kyiv Ukraine Aerospace Control Systems Department National Aviation University Kyiv Ukraine Department of telecommunication and radioelectronic systems National Aviation University Kyiv Ukraine Air Transportation Management Department National Aviation University Kyiv Ukraine Business School Dublin City University Dublin Ireland Electromechanical and computer systems department Educational scientific professional pedagogical Institute Ukrainian Engineering Pedagogical Academy Kharkiv Ukraine

ISBN: (数字)9798350368178

ISBN: (纸本)9798350368185

The paper deals with the design of a variable-structure chaotic oscillator for path-planning applications of autonomous mobile vehicles. This oscillator is designed as a result of analysis of the generalized dynamical system. We use interval methods to model such a system and take into consideration its nonlinearities. Our approach offers to replace exactly defined system nonlinear functions with domains where these functions are localized. We define lower and upper boundaries for these domains by using piecewise linear functions. The usage of these functions allows us to rewrite initial nonlinear system equations into linear-like form with linear terms that are defined in some intervals and thus simplify the system model. Piecewise linearity of this model gives us the possibility to analyze the system features by using various control methods. Such a model can be used in both real and complex domains. The consideration of system dynamics in a complex domain allows us to increase the order of the considered system and define a set of operation modes to design a variable-structure system. We show the benefits of our approach by studying the Duffing pendulum and designing its base variable-structure system.

关键词： Performance evaluation Trajectory planning System dynamics Linearity Switches Mathematical models Trajectory Nonlinear systems Oscillators Nanotechnology

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Event-Triggered Sliding Mode control Strategies for Positioning Systems: An Experimental Assessment

Event-Triggered Sliding Mode Control Strategies for Position...

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International Workshop on Advanced Motion control (AMC)

作者： Andrej Sarjaš Martin Steinberger Dušan Gleich Martin Horn Faculty of Electrical Engineering and Computer Science University of Maribor Maribor Slovenia Graz University of Technology Institute of Automation and Control Graz Austria

ISBN: (数字)9781728131894

ISBN: (纸本)9781728131900

The paper presents experimental assessments of different event-triggered sliding mode control strategies. The main purpose of the event-triggered control approach is to reduce the system utilization and relax the scheduling of the tasks on real-time systems. Event triggering is a real-time implementation technique, where the execution of the controller is not fixed to a preselected sampling time. The stability and performance of the controlled system need to be preserved with regard to the sporadic nature of the controller update. Sliding mode controllers are employed in the context of event-triggering to achieve robustness with respect to matched perturbations. Three different sliding mode event-triggered strategies are evaluated on the real-time positioning system. All the obtained experimental results are compared to a time-triggered version. The results confirm that event-triggering sliding mode control is well suited and reduce the system use drastically.

关键词： Tracking Computational modeling Real-time systems Stability analysis Robustness Task analysis Sliding mode control

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Networked Event-Based Trajectory Planning for Mobile Objects

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IFAC-PapersOnLine 2018年第23期51卷 170-175页

作者： Schwung, Michael Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

This paper proposes an event-based method to ensure a collision-free movement of mobile objects. The objects are locally controlled and connected by a communication network. Each object possesses an event-based trajectory planning unit, which acts on a dynamical model representing the neighbouring objects together with the uncertainty of the predicted states. If a common control goal is violated due to local disturbances affecting the objects, communication to neighbouring objects is invoked. A replanning of the local trajectory based on the communicated information attenuates the disturbance. In contrast to existing literature, this approach has a lower communication effort. The effectiveness of the method is illustrated by a simulation study with two quadrotors. © 2018

关键词： Networked control systems Trajectories Unmanned aerial vehicles (UAV) Collision free movement Event based control Event based method Local disturbances Networked systems Simulation studies Trajectory Planning Trajectory based

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Discrete-event demonstrator HANS

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IFAC-PapersOnLine 2018年第7期51卷 298-303页

作者： Zgorzelski, Markus Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

This paper presents a model manufacturing cell for the testing of modelling and control design methods of discrete-event systems. It is a handling system for the transport and the processing of workpieces. The hardware and automation structure is introduced and its possible applications as a demonstrator of advanced control methods are discussed. It is also shown how this manufacturing cell can be used for education. © 2018

关键词： Discrete event simulation Cellular manufacturing Engineering education Flexible manufacturing systems Materials handling Materials handling equipment Advanced control automation structures Discrete events Flexible manufacturing Handling systems Modelling and controls

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Structural reduction of CRNs with linear sub-CRNs

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IFAC-PapersOnLine 2021年第14期54卷 149-154页

作者： Katalin M. Hangos György Lipták Gábor Szederkényi Systems and Control Laboratory Computer and Automation Research Institute P.O. Box 63 H-1518 Budapest Hungary Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Faculty of Information Technology and Bionics Péter Pázmány Catholic University Budapest Hungary

A novel systems theory-based structural reduction method is proposed in this paper that can be applied to chemical reaction networks (CRNs) including subsystems consisting of linear reactions, i.e. a linear sub-CRN. The reduced model is a delayed CRN with distributed delays having less complexes (monomials) and reactions than the original model. The reduction is based on the fact that the input/output response of a linear sub-CNR can be seen as a time-delayed input to output relationship, therefore linear sub-CNRs can be interpreted as reactions with distributed delay from their input to their output complexes. The practically important example of a kinetic model describing the spread of the COVID-19 epidemic is used as a case study to illustrate the basic concepts and the computation method.

关键词： Delay Model reduction Chemical Reaction Networks COVID

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A new approach to tracking control of networked discrete-event systems

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IFAC-PapersOnLine 2018年第7期51卷 448-455页

作者： Zgorzelski, Markus Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

This paper presents a method for the tracking control of discrete-event systems that utilise digital communication only if the communication among the subsystems is necessary for solving the current task. The controlled subsystems are modelled by Input/Output (I/O)-automata and their local control aim is to reach given final states autonomously. The necessity of communication arises when there are synchronous state transitions on the state sequence into the final state, which may only be executed simultaneously by a set of subsystems. A new network unit is introduced, which extends each controlled subsystem in order to satisfy these cooperative tasks. It detects, initiates and ensures the simultaneous execution of the synchronous state transitions by means of the digital communication network. It is proved that the networked system is guaranteed to satisfy the local tasks in the networked discrete-event system, while executing the synchronous state transitions only synchronously. A cooperative car assembling process is used to demonstrate the proposed method. © 2018

关键词： Networked control systems Digital communication systems Discrete event simulation Navigation Assembling process cooperative car assembling Cooperative tasks Digital communication networks Digital communications Networked systems Synchronous state Tracking controls

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Tracking control of Networked and Interconnected Systems

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IFAC-PapersOnLine 2018年第23期51卷 40-45页

作者： Schenk, Kai Lunze, Jan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

Networked and interconnected systems denote a class of systems that consists of physically coupled subsystems that can exchange information via a communication network. This paper presents a new design method for tracking controllers, which guarantee that the output of each subsystem follows a specified trajectory. Each controller is synthesised by a design agent that is introduced as a local component with limited knowledge of the overall system. Each design agent uses the network to gain information that is necessary for the controller synthesis. The information exchange takes places exclusively at design time and concerns an important aspect of this work. The method presented in this paper extends classical two-degree-of-freedom controllers by decoupling units. These units are essential for achieving the desired tracking. It is proven that the proposed extension yields the desired trajectory tracking. A simulation study demonstrates the applicability. © 2018

关键词： Networked control systems controllers Degrees of freedom (mechanics) Feedforward control Information dissemination Large scale systems Networks (circuits) Trajectories controller synthesis Desired trajectories Information exchanges Simulation studies Specified trajectories Tracking controller Tracking system Two degree of freedom controller

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