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Iterative Thresholding and Projection Algorithms and Model-Based Deep Neural Networks for Sparse LQR control Design

IEEE TRANSACTIONS ON AUTOMATIC control 2025年第2期70卷 1100-1114页

作者： Cho, Myung Calif State Univ Northridge Dept Elect & Comp Engn Northridge CA 93063 USA

In this article, we consider a linear-quadratic regulator (LQR) design problem for distributed control systems. For large-scale distributed systems, finding a solution might be computationally demanding due to communications among agents. To this aim, we deal with LQR minimization problem with a regularization for sparse feedback matrix, which can lead to achieve the reduction of the communication links in the distributed control systems. For this work, we introduce simple but efficient iterative algorithms-iterative shrinkage-thresholding algorithm and iterative sparse projection algorithm. They can give us a tradeoff solution between LQR cost and sparsity level on feedback matrix. Moreover, in order to improve the speed of the proposed algorithms, we design deep neural network models based on the proposed iterative algorithms. Numerical experiments demonstrate that our algorithms can outperform the previous methods using the alternating direction method of multiplier [Lin et al. (2013)] and the gradient support pursuit [Lian et al (2017)], and their deep neural network models can improve the performance of the proposed algorithms in convergence speed.

关键词： Sparse matrices Decentralized control control design Vectors Adaptive control Stacking distributed control system feedback matrix design least quadratic regulator linear-quadratic regulator (LQR) optimal control sparse optimal control sparse optimal control

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Stability analysis of multi-area interconnected power systems under denial of service (DoS) attack

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NONLINEAR DYNAMICS 2025年第13期113卷 17017-17039页

作者： Hamdan, Mutaz M. Flitti, Farid Khalid, Haris M. Wajih, Yousef Al Al Ahliyya Amman Univ Elect Engn Dept Fac Engn Amman 19328 Jordan Higher Coll Technol Dept Elect & Elect Engn Dubai 7947 U Arab Emirates Univ Dubai Coll Engn & Informat Technol Dubai 14143 U Arab Emirates Univ Johannesburg Dept Elect & Elect Engn Sci ZA-2006 Aukland Pk South Africa King Fahd Univ Petr & Minerals Control & Instrumentat Engn Dept Dhahran 31261 Saudi Arabia

Power systems are essential in the current lifestyle and the demand on the electricity is continuously increasing. To meet the demand load and to provide customers with the required electricity, power generation areas have been connected to maintain the supply even though one generation area fails. This study investigates the risk of cyber-attacks on power systems, which can result in instability and system failure. Specifically, the focus is on the stabilization of a multi-area interconnected power system (MAIPS) when subjected to a denial of service (DoS) attack that disrupts communication channels. First, we apply a controller with static feedback to stabilize the MAIPS under normal conditions. Next, we examine the system's stability under DoS attack, while considering certain parameters such as the duration and frequency of the attack. Finally, we present an example of a three-area interconnected power system with multiple scenarios to show the efficacy of the presented method. The proposed method successfully maintains the MAIPS' stability in the nominal situation and the presence of DoS attack. Moreover, the overshoot of the states during the transient response is small and the time needed to get the system stabilized is reasonable.

关键词： Stability analysis DoS attack Cyberattack Multi-areas power system distributed control system

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Islanding of a Microgrid Using a distributed Multi-agent control system 11

Islanding of a Microgrid Using a Distributed Multi-agent Con...

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11th Annual IEEE Energy Conversion Congress and Exposition (ECCE)

作者： Al Jajeh, Mohamad Fares Ali, Syed Qaseem Joos, Geza Novickij, Ilja McGill Univ Dept Elect & Comp Engn Montreal PQ Canada OPAL RT TECHNOL Inc Applicat eXpertise & Elect Simulat Div AXES Montreal PQ Canada

ISBN: (纸本)9781728103952

The use of distributed control systems for microgrid control has gained traction in recent years for their reliability and modularity. As part of microgrid control core functions, islanding is implemented to enhance power supply reliability during outages. This paper proposes a distributed multi-agent control system architecture for the management of microgrid assets. Specifically, it addresses the islanding problem, whereas three agent categories are designed to control distributed energy resources, loads and other assets. The proposed control approach is unique as it centrally sources critical commands while keeping the commands execution local and based on distributed coordination. Post-islanding transients are minimized and system stability is retained by implementing two distributed load shedding and load curtailment algorithms for unplanned and planned islanding events, respectively. A controller hardware-in-the loop real-time simulation on a modified CIGRE North American medium voltage distribution benchmark has been developed and used to demonstrate the effectiveness of the approach.

关键词： microgrid distributed control system multi-agent system islanding controller hardware-in-the-loop

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Functional Dependability of distributed control of Multi-Zone Objects Under Failures Conditions

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IEEE ACCESS 2024年 12卷 95736-95749页

作者： Dubovoi, Volodymyr Yukhimchuk, Maria Kovtun, Viacheslav Grochla, Krzysztof Vinnytsia Natl Tech Univ Dept Comp Control Syst UK-21000 Vinnytsia Ukraine Polish Acad Sci Inst Theoret & Appl Informat PL-44100 Gliwice Poland

The significance of the functional dependability problem of distributed control systems is constantly increasing due to the spread of inexpensive controllers and sensors and the creation of Internet of Things (IoT) systems. In the case of distributed control of multi-zone objects with the mutual influence of zones, the problem is complicated by changes in the operating modes of local control systems (LCS) due to the failures of elements of the systems of neighboring zones. This, in turn, leads to a change in their failure rates. In this work, the functional dependability model of the decentralized distributed control system for multi-zone objects was developed and investigated. The model is obtained in the form of an inhomogeneous Markov chain of the system states caused by failures of elements of LCS. The probabilities of transitions between states are described by the Chapman-Kolmogorov equations and additional equations that describe the relationship between the parameters of neighboring zones and the corresponding LCS. The impact of Data Transmission system (DTS) overload, controller failures, sensor failures, and DTS failures on the probability of the zones' state exceeding the permissible limits was studied. The functional safety assessment model of decentralized control of multi-zone objects, proposed in the previous works of the author was used for the theoretical analysis. Verification of the theoretical model is achieved through simulation, leveraging a library of modules developed by the authors on the Scilab/Xcos platform. The simulation showed that the "cascade failures" process is probable for multi-zone objects with coordinated control according to a global criterion and a strong connection between the parameters of the zones, which leads to the rapid loss of functional dependability.

关键词： Decentralized control Reliability Analytical models Sensors Sensor systems Safety Mathematical models Functional dependability multi-zone object decentralized coordination distributed control system

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Angles-Only Cooperative Local Catalog Maintenance of Close-Proximity Satellite systems

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JOURNAL OF GUIDANCE control AND DYNAMICS 2024年第12期47卷 2573-2586页

作者： Hays, Christopher W. Henderson, Troy Miller, Kristina Phillips, Sean Soderlund, Alexander Embry Riddle Aeronaut Univ Aerosp Engn Dept 1 Aerosp Blvd Daytona Beach FL 32114 USA Univ Illinois Elect & Comp Engn Dept 1308 W Main St Urbana Urbana IL 61801 USA USAF Res Lab Space Control Branch Kirtland AFB NM 87123 USA

In space mission sets like on-orbit servicing and manufacturing, agents in close proximity may operate too close to yield resolved localization solutions to operators. This requires that the system maintain a catalog of its local neighborhood;however, this imposes a large burden on each agent to update its catalog. This paper considers the case of multiple satellites each maintaining their catalog. Specifically, this paper considers the case of numerous noncooperative objects and a collection of agents operating in the same local environment. The goal of each agent is to maintain their catalog of all bodies (objects and agents) within this neighborhood through onboard angles-only measurements and cooperative communication with the other agents. A central supervisor selects the target body for each agent, a local controller tracks the selected target body for each agent, and a local estimator coalesces both an agent's measurements and state estimates provided by neighboring agents within the communication graph. Numerical results are provided to demonstrate the supervisor's ability to select an appropriate target subject to an uncertainty threshold, the controller's ability to track the selected target, and the estimator's ability to maintain an accurate and precise estimate of each of the bodies in the local environment.

关键词： Linear Time Invariant system Algorithms and Data Structures Collaborative Decision Making Extended Kalman Filter State Estimation distributed control system Spacecraft Autonomous Operations Spacecraft Attitude control Spacecraft Guidance and control Autonomous Formation Flying system

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Verification and validation optimization method for signal quality bits in digital control system application software of nuclear power plant

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KERNTECHNIK 2024年第3期89卷 301-315页

作者： Wang, Lingzhi Wu, Yichun Xiamen Univ Coll Energy Xiangan Nan Rd 4221 Xiamen 361102 Fujian Peoples R China Xiamen City Univ Sch Artificial Intelligence Xiamen 361008 Fujian Peoples R China

The digitalization enhances nuclear power plant (NPP) instrumentation and control (I&C) system performance, while simultaneously introducing safety and reliability challenges. To enhance the stability of distributed control system (DCS), and minimize the dangerous failure rate and safe failure rate of safety system, signal quality bits (SQBs) are widely used in NPP DCS to identify the validity of important signals. However, in the past decade or so, numerous unscheduled turbine shutdowns and/or reactor trips have resulted from incorrect SQB design or settings. Therefore, it is necessary to conduct optimization research on the design methods and setting principles of SQBs, establish an optimization method for DCS application software SQB verification and validation (V&V), then minimize DCS faults attributed to SQB. With the aim, this work conducts an in-depth investigation and analysis of the definition, design, setting and transmission of SQB in NPP. A specific optimization method for software V&V to conduct SQB on NPP safety DCS application software is proposed. Twelve concerns in the SQB V&V work are detailed. The reactor trip system Delta T protection logic is utilized as a case to illustrate the detail implementation process of this optimization method. This work provides an engineering technical reference and operational guidance for SQB software V&V, conducive to ensuring the safe and economical operation of NPPs.

关键词： nuclear power plants distributed control system signal quality bit verification and validation

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MMC Based Solid State Transformer for Large-Scale distributed PV Integration and Medium Voltage AC/DC Interconnection

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IEEE TRANSACTIONS ON POWER DELIVERY 2024年第4期39卷 2495-2506页

作者： Farzamkia, Saleh Zhang, Mafu Zou, Huanghaohe Vetrivelan, Adithyan Huang, Alex Q. Univ Texas Austin Semicond Power Elect Ctr SPEC Austin TX 78712 USA

This paper proposes a novel multiport modular multilevel converter-based solid state transformer (MMC-SST) with a distributed control system architecture for large-scale PV integration and medium-voltage AC/DC interconnection. The distributed arrangement of PV arrays within the proposed topology enables the implementation of distributed maximum power point tracking (DMPPT), which mitigates the effects of partial shading and enhances energy harvesting from PV arrays. The symmetric design of the proposed MMC-SST eliminates the common power imbalance issue in MMC-based PV inverters. Additionally, the symmetric design of sub-MMC modules introduced in this paper makes it possible to suppress capacitor voltage ripples and differential currents effectively without the need for measuring arm currents. As a result, the proposed MMC-SST requires a smaller capacitor size, fewer current sensors, and lower isolated communications. Several case studies are conducted, and hardware-in-the-loop (HIL) simulation results are provided to validate the performance of the proposed MMC-SST and designed control system.

关键词： distributed control system MMC-SST modular multilevel converter (MMC) power balance PV inverter solid state transformer (SST)

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distributed Optimization Method for Spacecraft Attitude control and Vibration Suppression

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JOURNAL OF GUIDANCE control AND DYNAMICS 2023年第4期46卷 752-760页

作者： Hu, Yabo Bernelli-Zazzera, Franco Geng, Yunhai Harbin Inst Technol Res Ctr Satellite Technol Harbin 150001 Peoples R China Polytech Univ Milan Dept Aerosp Sci & Technol I-20156 Milan Italy

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The Design of a distributed control system Based on CAN bus

The Design of a Distributed Control System Based on CAN bus

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10th IEEE International Conference on Mechatronics and Automation (ICMA)

作者： Gao, Xiang Huang, Dagui Chen, Yuanqiang Jin, Wei Luo, Yi Univ Elect Sci & Technol China Sch Mechatron Engn Minist Informat Ind Intelligent Mech Syst Engn La Chengdu Sichuan Provinc Peoples R China

ISBN: (纸本)9781467355605

CAN field-bus is a technology of serial communication network effectively supporting distributed or real time control system. This paper presents a method to design a kind of distributed control system based on CAN bus, narrates application of CAN field-bus in supervision and control system of Production Line of Power Battery, and presents the structure of the system and of the intelligent control unit. The software of the supervision and control system is based on VS2010. In addition, it introduces in particular the design of identifier in CAN field-bus and the flow of communication software.

关键词： Production Line of Power Battery CAN bus distributed control system VS2010 design of identifier

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DCS devices based non-linear process control system design for plants with distributed time-delay using particle filter

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Journal of Central South University 2019年第12期26卷 3351-3358页

作者： DENG Ming-cong FUJII Ryohei The Graduate School of Engineering Tokyo University of Agriculture and TechnologyTokyo 184-8588Japan

Remote control process system with distributed time-delay has attracted much attention in different *** this paper,non-linear remote control of a single tank process system with wireless network is *** deal with the distributed time-delay in a large-scale plant,the time-delay compensation controller based on DCS devices is designed by using operator theory and particle *** control system(DCS)device is developed to monitor and control from the central monitoring room to each *** particle filter is a probabilistic method to estimate unobservable information from observable ***,remote control system and experimental equipment are ***,control system based on an operator theory is ***,process system with distributed time-delay using particle filter is carried ***,the actual experiment is conducted by using the proposed time-delay compensation *** estimating with the proposed method,the result is close to the case in which the distributed time-delay does not *** effectiveness of the proposed control system is confirmed by experiment results.

关键词： non-linear remote control distributed control system particle filter operator theory distributed time-delay

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