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Assessment of Operational Risks of Electric Interlocking Systems

Russian Electrical engineering 2018年第9期89卷 550-554页

作者： Gorelik, A.V. Gorelik, V. Yu. Shalyagin, D.V. Chair of Automation and Telemechanics on Railway Transport Institute of Transport Engineering and Control Systems Russian University of Transport Moscow127055 Russia

Abstract: This article proposes a technique for assessing risks related to operational reliability levels of systems of electric interlocking of track switches and signals at railroad stations. The assessment relies on the mathematical model of such random processes as failures and recoveries of the system of electric interlocking of track switches and signals and on using this system to fulfill train traffic control functions at a given station. The risk related to the operational safety of the electric interlocking system is calculated for the railroad station in general, not for a specific scenario of events. The statistics of safety violation events is based on a small sample. The risk related to the operational reliability of the electric interlocking system is assessed using risk matrices in the form of tables, where the likelihood of occurrence and the number of train delays at the station due to failures in the electric interlocking system are used together. The train delay likelihood found from the matrix is used as the frequency of events to assess operational reliability level risks. The number of trains delayed per calculated period and the average time of train delay at the considered station are used as event aftereffects. The assessment results can be used to make valid managerial decisions. © 2018, Allerton Press, Inc.

关键词： Reliability

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Evaluation method and workbench for APC strategies 7th

Evaluation method and workbench for APC strategies

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7th International Symposium on Advanced control of Chemical Processes, ADCHEM 2003

作者： Reinig, G. Mahn, B. Ruhr University of Bochum Faculty of Mechanical Engineering Chair of Control Engineering Germany

The large number of various advanced control strategies (e.g. Model Predictive control. Neural Networks or Fuzzy control) and the lack of a practically usable selection methodology make it very difficult to choose an appropriate strategy for a given plant. In order to support the selection of proper control strategies and products a set of relevant evaluation criteria is developed. A flexible and expandable test environment (workbench) is created aiming at a controller evaluation considering these criteria. The evaluation approach and workbench are demonstrated for PID based and commercial Model Predictive controllers at some typical process units and plants. Copyright © IFAC 2003

关键词： Model predictive control

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Experimental investigation of flow characteristics in tailpipe of a pulsation reactor

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Experimental Thermal and Fluid Science 2025年 168卷

作者： Zhang, Chunliang Odenbach, Stefan Chair of Magnetofluid Dynamics Measuring and Automation Technology. Institute of Mechatronic Engineering. Faculty of Mechanical Science and Engineering. TU Dresden. George-Bähr-Str. 3 Dresden Sachsen 01069 Germany

Flow characteristics within the tailpipe of a pulsation reactor are crucial for understanding and optimizing system performance, particularly in relation to heat transfer, acoustic interactions, and flow dynamics. This study examines the fluid flow velocity in the tailpipe of a laboratory-scale pulsation reactor using phase-locked PIV measurements. The results provide spatially and temporally resolved velocity profiles under different operating conditions, along with (phase-averaged) mean flow velocity measurements. The findings confirm a periodic velocity variation in the tailpipe that correlates with the pulsation cycle. The velocity field and oscillatory velocity amplitude in the core flow region are analyzed, revealing that the mean velocity and oscillatory amplitude vary significantly with the air–fuel equivalence ratio. Under stable pulsation conditions, an increase in the air–fuel equivalence ratio leads to a decrease in velocity amplitude, while the mean velocity increases. This indicates that optimizing operating conditions can influence not only the combustion process but also the flow characteristics. Additionally, CFD simulations are conducted to complement the PIV measurements by providing further insights into the velocity distribution and flow field dynamics. © 2025 The Authors

关键词： Periodic flow characteristics PIV Pulse combustor Unsteady combustion

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Target Capturing in an Ellipsoidal Region for a Swarm of Double Integrator Agents

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 801-811页

作者： Antonio Bono Luigi D'Alfonso Giuseppe Fedele Veysel Gazi IEEE Department of Informatics ModelingElectronics and Systems EngineeringUniversity of CalabriaRende 87036Italy Dept.Electrical and Electronics Eng. Faculty of EngineeringMarmara UniversityIstanbul 34722 Department of Control and Automation Engineering Faculty of Electrical and Electronics EngineeringYildiz Technical UniversityEsenler 34220Turkey

In this paper we focus on the target capturing problem for a swarm of agents modelled as double integrators in any finite space *** agent knows the relative position of the target and has only an estimation of its velocity and *** that the estimation errors are bounded by some known values,it is possible to design a control law that ensures that agents enter a user-defined ellipsoidal ring around the moving *** know the relative position of the other members whose distance is smaller than a common detection ***,in the case of no uncertainty about target data and homogeneous agents,we show how the swarm can reach a static configuration around the moving *** simulations are reported to show the effectiveness of the proposed strategy.

关键词： Agents-based systems cooperative control swarms target-capturing

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Processing and monitoring algorithm for solar-powered smart home in DC-environment system based on RF-radio node 11th

Processing and monitoring algorithm for solar-powered smart ...

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11th Multi-disciplinary International Workshop on Artificial Intelligence, MIWAI 2017

作者： Sabry, A.H. Hasan, W.Z.W. Kadir, Mza Ab. Radzi, M.A.M. Shafie, S. Control and Automation Faculty of Engineering UPM Serdang Malaysia Faculty of Engineering UPM Serdang Malaysia

ISBN: (纸本)9783319694559

The success of a design of an effective premises area network requires appropriate algorithm and communication strategy. The primary objective of this paper is to present an effective algorithm for low cost process and monitoring system integrated with energy management of a solar-powered home system. The proposed algorithm designed to serve a system of a low power consumption and recognized by a lower number of electronic components, the system includes only a pair of XBee RF modules to process signals of current, voltage and temperature sensors and to monitor the power consumption data rate variations. The proposed control algorithm able to manage the Xbee on-board micro-controller with the associated sensors to act as a remote integrated wireless sensor node. The processed information sent to base node attached to PC for monitoring the attained data and displaying over an appropriate GUI. The approach suits the XBee RF environment, but, based on a direct sensor link concept, can open horizon to other wireless sensor networking applications such as WiFi. The results have been validated by a real case study conducted in solar powered home appliances in the DC - environment system. A (11–123) Hz sampling frequency has been achieved to capture the possible surge power. This work serves as an essential stepping stone towards more efficient wireless circuit design for the smart home energy system. © Springer International Publishing AG 2017.

关键词： Domestic appliances

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Finite Element Modeling and Motion Planning of an Adaptive Elastic Wingsail

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IFAC-PapersOnLine 2017年第1期50卷 6768-6773页

作者： Kater A. Wriedt J.-P. Meurer T. Chair of Automatic Control Faculty of Engineering Kiel University Kiel 24143 Germany

A systematic motion planning methodology for elastomechanic structures is introduced using a combination of flatness based feedforward control and state feedback control. The concept is applied to a so-called wingsail for yachts, this structure can be described as a complex flexible structure based on two curved carbon sail areas with embedded actuators allowing to generate deflections to accomplish an adaptive sail structure. Due to the complexity of the structure the finite element method (FEM) is applied to determine the equations of motion (EOMs) in terms of a high dimensional system of ordinary differential equations (ODEs). The usage of model order reduction by means of modal truncation leads to a design system of feasible dimension and also directly represents a suitable form for the determination of the flatness-based state and input parametrization. This yields an efficient approach for motion planning and feedforward control, which is amended by a state feedback controller to address model uncertainties or disturbances. Simulation results illustrate the performance of the presented two-degrees-of-freedom control approach. © 2017

关键词： adaptive structure distributed parameter system feedforward control finite element method motion planning Smart structures wingsail

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Backstepping-based extended Luenberger observer design for a Burgers-type PDE for multi-agent deployment

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IFAC-PapersOnLine 2017年第1期50卷 6780-6785页

作者： Freudenthaler G. Göttsch F. Meurer T. Chair of Automatic Control Faculty of Engineering Kiel University Kiel 24143 Germany

An extended Luenberger state observer is presented for a Burgers-type PDE. For this, pointwise boundary and an additional in-domain measurement are considered, which allows to split the observer setup into two subsystems. The observer gains are determined by utilizing the backstepping technique, which enables to stabilize the distributed parameter observer error dynamics. The concept is integrated into a motion planning and feedback control strategy and is applied to achieve the deployment of multi-agent continuum into desired spatial-temporal formation profiles. For the evaluation of the observer strategy the transfer to a finite-dimensional discrete multi-agent system in leader-follower configuration is obtained by means of a finite difference discretization. This in addition imposes the required communication topology for the interconnected agents. © 2017

关键词： backstepping Burger's equation deployment extended Luenberger observer formation control multi-agent system observer design Partial differential equation

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Transmission-order optimization for bidirectional device-to-device (D2D) communications underlaying cellular TDD networks - A graph theoretic approach

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IEEE Journal on Selected Areas in Communications 2016年第1期34卷 1-14页

作者： Uykan, Zekeriya Jäntti, Riku Department of Control and Automation Engineering Faculty of Engineering Doʇuş University Istanbul34722 Turkey Aalto University School of Electrical Engineering Aalto University Espoo02150 Finland

Device-to-device (D2D) communications underlaying cellular networks is a promising concept that has several advantages over the traditional cellular networks. In the TDD system, the frame structure defines the order of uplink and downlink transmission slots. Typically, a TDD system is synchronized, and the same transmission order (TO) is used in all cells. In a direct D2D link, we have the freedom of selecting the TO of the devices freely. To our best knowledge, no paper has explicitly examined the TO optimization problem in D2D communications underlaying cellular network so far. In this paper, we focus exactly on this problem: once the proper co-channel D2D pairs are determined in the network, how do we minimize the network interference by optimally determining the TOs in all D2D links (together with co-channel cellular links) in the network, which is an NP-complete problem. In this paper, we formulate the TO optimization problem from a graph theoretic point of view: 1) we show that the TO optimization problem is equal to a constraint balanced min-cut graph partitioning problem of our defined augmented graph;and 2) we propose and analyze a distributed and a centralized efficient asynchronous clustering algorithm for solving the TO optimization problemequivalently for themin-cut of our proposed augmented graph. Computer simulations for the TDD-based D2D underlaying cellular network show that the proposed distributed and centralized algorithms, called ABCAMiC and CABCAMiC, respectively, 1) remarkably outperform the reference case where all TOs are fixed, 2) converge within a relatively small number of steps and generally converge in only a few epochs even for a large number of cellular and D2D users, and 3) the expected performance of the (partly/fully) distributed ABCAMiC is almost equal to that of the centralized solution CABCAMiC, which generally gives near-global optimal solution to the TO optimization problem. © 2015 IEEE.

关键词： Clustering algorithms

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AirVista-II: An Agentic System for Embodied UAVs Toward Dynamic Scene Semantic Understanding

arXiv

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arXiv 2025年

作者： Lin, Fei Tian, Yonglin Zhang, Tengchao Huang, Jun Guan, Sangtian Wang, Fei-Yue Department of Engineering Science Faculty of Innovation Engineering Macau University of Science and Technology 999078 China State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100190 China

Unmanned Aerial Vehicles (UAVs) are increasingly important in dynamic environments such as logistics transportation and disaster response. However, current tasks often rely on human operators to monitor aerial videos and make operational decisions. This mode of human-machine collaboration suffers from significant limitations in efficiency and adaptability. In this paper, we present AirVista-II—an end-to-end agentic system for embodied UAVs, designed to enable general-purpose semantic understanding and reasoning in dynamic scenes. The system integrates agent-based task identification and scheduling, multimodal perception mechanisms, and differentiated keyframe extraction strategies tailored for various temporal scenarios, enabling the efficient capture of critical scene information. Experimental results demonstrate that the proposed system achieves high-quality semantic understanding across diverse UAV-based dynamic scenarios under a zero-shot setting. Copyright © 2025, The Authors. All rights reserved.

关键词： Drones

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Non-Monotonic Lyapunov-Krasovskii Functional Approach to Stability Analysis and Stabilization of Discrete Time-Delay Systems

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IEEE/CAA Journal of Automatica Sinica 2020年第3期7卷 752-763页

作者： Younes Solgi Alireza Fatehi Ala Shariati Advanced Process Automation and Control Research Group Industrial Control Center of ExcellenceFaculty of Electrical EngineeringK.N.Toosi University of TechnologyTehran 16317-14191Iran IEEE

In this paper, a novel non-monotonic Lyapunov-Krasovskii functional approach is proposed to deal with the stability analysis and stabilization problem of linear discrete time-delay systems. This technique is utilized to relax the monotonic requirement of the Lyapunov-Krasovskii theorem. In this regard, the Lyapunov-Krasovskii functional is allowed to increase in a few steps, while being forced to be overall decreasing. As a result, it relays on a larger class of Lyapunov-Krasovskii functionals to provide stability of a state-delay system. To this end, using the non-monotonic Lyapunov-Krasovskii theorem, new sufficient conditions are derived regarding linear matrix inequalities(LMIs)to study the global asymptotic stability of state-delay ***, new stabilization conditions are also proposed for time-delay systems in this article. Both simulation and experimental results on a p H neutralizing process are provided to demonstrate the efficacy of the proposed method.

关键词： Linear matrix inequality(LMI) non-monotonic Lyapunov-Krasovskii functional(NMLKF) pH neutralization plant stabilization state-delay system time-delay system

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