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Robust distributed model predictive consensus of discrete-time multi-agent systems: a self-triggered approach Research Articles

Jiaqi Li, Qingling Wang, Yanxu Su, Changyin Sun,jiaqil2018@seu.edu.cn,qlwang@seu.edu.cn,yanxu.su@seu.edu.cn,cysun@seu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 8,   Pages 1068-1079 doi: 10.1631/FITEE.2000182

Abstract: This study investigates the problem of a nonlinear discrete-time multi-agent system (MAS) under bounded additive disturbances. We propose a self-triggered robust algorithm. A new cost function is constructed and MAS is coupled through this function. Based on the proposed cost function, a self-triggered mechanism is adopted to reduce the communication load. Furthermore, to overcome additive disturbances, a local minimum– maximum optimization problem under the worst-case scenario is solved iteratively by the model predictive controller of each agent. Sufficient conditions are provided to guarantee the iterative feasibility of the algorithm and the of the closed-loop MAS. For each agent, we provide a concrete form of compatibility constraint and a error terminal region. Numerical examples are provided to illustrate the effectiveness and correctness of the proposed algorithm.

Keywords: 一致性;自触发控制;分布式模型预测控制    

Distributed game strategy for unmanned aerial vehicle formation with external disturbances and obstacles Research Article

Yang YUAN, Yimin DENG, Sida LUO, Haibin DUAN

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 1020-1031 doi: 10.1631/FITEE.2100559

Abstract: We investigate a for formations with external disturbances and obstacles. The strategy is based on a framework and . First, we propose a to estimate the influence of a disturbance, and prove that the observer converges in fixed time using a Lyapunov function. Second, we design an based on topology reconstruction, by which the UAV can save energy and safely pass obstacles. Third, we establish a distributed MPC framework where each UAV exchanges messages only with its neighbors. Further, the cost function of each UAV is designed, by which the UAV formation problem is transformed into a game problem. Finally, we develop LFPIO and use it to solve the Nash equilibrium. Numerical simulations are conducted, and the efficiency of LFPIO based distributed MPC is verified through comparative simulations.

Keywords: Distributed game strategy     Unmanned aerial vehicle (UAV)     Distributed model predictive control (MPC)     Levy flight based pigeon inspired optimization (LFPIO)     Non-singular fast terminal sliding mode observer (NFTSMO)     Obstacle avoidance strategy    

High Precision Adaptive Predictive Control for Cruise Missile

Sun Mingwei,Chen Zengqiang,Yuan Zhuzhi,Ren Qiang,Yang Ming

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 23-27

Abstract:

Cruise missile achieves good flight performance by means of stabilization and regulation of its attitudes. Based on analysis of the perturbation model of missile*s dynamic characteristics, series control structures are constructed for attitude control loop, and their discrete models are served as controlled plant for recursive least square (RLS) based adaptive predictive control, thus the mass center control with slow response transforms into trajectory angle control with fast response and high precision. On the basis of missile’s characteristics, generalized predictive control (GPC) is used in inner attitude loop, and an integral form of predictive control is adopted in outter trajectory loop. Effective transformation from mass center command to trajectory reference has achieved to realize high precision tracking. This method realizes the integration of attitude reference signal with guidance command, and that of attitude control with mass center control. It can reduce precision requirements on aerodynamic data and the control parameters can be easily selected. The numerical simulations demonstrate its effectiveness. Finally, some further academic directions are presented.

Keywords: cruise missile     adaptive control     model based predictive control     robustness    

The Application of Multi-agent Based Distributed Intelligent Control in VAV Air Conditioning System

Zhang Hongwei,Wu Aiguo,Sheng Tao

Strategic Study of CAE 2006, Volume 8, Issue 7,   Pages 58-62

Abstract:

A VAV system can be treated as a multi-agent system. In this paper, a multi-agent-based distributed intelligent control method is presented to solve the problem of concordance and decoupling in the VAV system. A simulation program of VAV system is set up for control analysis. Through a simulation, this control method has been proved to be satisfactory.

Keywords: VAV     agent     multi-agent system     distributed intelligent control    

Double access control model of web service based ondistributed simulation system

Chen Xueqin,Wu Huizhong,Zhu Yaoqin

Strategic Study of CAE 2009, Volume 11, Issue 8,   Pages 72-78

Abstract:

As web service is taken up to develop distributed simulation system increasingly, the separation between functions and resources is obvious. This exposes many simulation resources to the wide area network, which are difficult for traditional and single access control models to deal with. A double access control based on attributes is proposed to achieve the access control of application function and simulation resources. The process flow of the access control is described in detail. Also, the model is realized and applied in the prototype of simulation based on acquisition system. The performance of resource access control realized on XACML is analyzed and tested, which proves the feasibility of the model.

Keywords: Web service security     double access control     distributed simulation system    

Identification of Time-delay Systems and Correction of NARMA Model

Wng Dongqing

Strategic Study of CAE 2006, Volume 8, Issue 2,   Pages 39-43

Abstract:

The paper introduces complemental explanation and analysis of existing time-delay identification scheme of nonlinear systems; meanwhile, points out the impropriety of NARMA model correction strategy for time-delay system^. The neural networks predictive control of time-delay system is taken as an example to present the correct NARMA model correction methods. Simulation results verify that the advanced correction methods can obtain good control performance and anti-disturbance capability.

Keywords: identification     NARMA model     neural network     predictive control    

The enlightenment of distributed energy in foreign countries to China

Du Caicai

Strategic Study of CAE 2015, Volume 17, Issue 3,   Pages 84-87

Abstract:

At present, China is vigorously promoting the development of distributed energy, in the background, learning from foreign experience in the development of distributed energy can contribute to the development of distributed energy in China. The paper reviews goals, practice and related policies of distributed energy development in the United States, Germany and Japan, respectively. Then the paper summarizes five enlightenments: the establishment of rules; the set of goals; the reform of power system; the establishment of grid standards; the establishment of economy prompting policies.

Keywords: distributed energy; foreign countries; enlightenment    

Containment control for heterogeneous nonlinear multi-agent systems under distributed event-triggered schemes Research Articles

Ya-ni Sun, Wen-cheng Zou, Jian Guo, Zheng-rong Xiang,xiangzr@njust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 1,   Pages 1-140 doi: 10.1631/FITEE.2000034

Abstract: We study the problem for high-order heterogeneous nonlinear under distributed event-triggered schemes. To achieve the objective and reduce communication consumption among agents, a scheme is proposed by applying the backstepping method, Lyapunov functional approach, and neural networks. Then, the results are extended to the self-triggered control case to avoid continuous monitoring of state errors. The developed protocols and triggered rules ensure that the output for each follower converges to the convex hull spanned by multi-leader signals within a bounded error. In addition, no agent exhibits . Two numerical simulations are finally presented to verify the correctness of the obtained results.

Keywords: Multi-agent systems     Distributed event-triggered control     Containment control     Heterogeneous nonlinear systems     Zeno behavior    

Matrix-valued distributed stochastic optimization with constraints

夏子聪,刘洋,卢文联,桂卫华

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9,   Pages 1239-1252 doi: 10.1631/FITEE.2200381

Abstract: In this paper, we address matrix-valued distributed stochastic optimization with inequality and equality constraints, where the objective function is a sum of multiple matrix-valued functions with stochastic variables and the considered problems are solved in a distributed manner. A penalty method is derived to deal with the constraints, and a selection principle is proposed for choosing feasible penalty functions and penalty gains. A distributed optimization algorithm based on the gossip model is developed for solving the stochastic optimization problem, and its convergence to the optimal solution is analyzed rigorously. Two numerical examples are given to demonstrate the viability of the main results.

Keywords: Distributed optimization     Matrix-valued optimization     Stochastic optimization     Penalty method     Gossip model    

Remarks on Distributed Energy System

Song Zhiping

Strategic Study of CAE 2004, Volume 6, Issue 12,   Pages 78-84

Abstract:

The emergence of distributed energy system is a matter of great significance relating to implementation of sustainable strategy. As proposed by the author, distributed energy system(DES)is defined as an electric power total system compatible with environment, sited in or in the vicinity of the consumer center area without bulk and/or remote power transmission. The DES concept allows people to build and operate energy system on total energy basis and thus facilitates demand side management as well as a more intelligent use of energy. It is considered essential for fossil fueled DES that energy is utilized in a cascade way matching the energy quality supplied and needed. DES also opens the most effective way of implementation of Combined Heat & Power as well as multi-generation. While the preferable choice of primary energy might be the clean fuel such as natural gas, but from the long-term point of view, the clean coal technology should not be excluded from the DES category. Although there is a great deal of interest in micro-turbines at the moment, combustion engines still have their tremendous potential for DES application.

Keywords: distributed energy system     sustainable strategy     Combined Heat & Power     multi-generation    

Strategies and Principles of Distributed Machine Learning on Big Data Review

Eric P. Xing,Qirong Ho,Pengtao Xie,Dai Wei

Engineering 2016, Volume 2, Issue 2,   Pages 179-195 doi: 10.1016/J.ENG.2016.02.008

Abstract:

The rise of big data has led to new demands for machine learning (ML) systems to learn complex models, with millions to billions of parameters, that promise adequate capacity to digest massive datasets and offer powerful predictive analytics (such as high-dimensional latent features, intermediate representations, and decision functions) thereupon. In order to run ML algorithms at such scales, on a distributed cluster with tens to thousands of machines, it is often the case that significant engineering efforts are required—and one might fairly ask whether such engineering truly falls within the domain of ML research. Taking the view that “big” ML systems can benefit greatly from ML-rooted statistical and algorithmic insights—and that ML researchers should therefore not shy away from such systems design—we discuss a series of principles and strategies distilled from our recent efforts on industrial-scale ML solutions. These principles and strategies span a continuum from application, to engineering, and to theoretical research and development of big ML systems and architectures, with the goal of understanding how to make them efficient, generally applicable, and supported with convergence and scaling guarantees. They concern four key questions that traditionally receive little attention in ML research: How can an ML program be distributed over a cluster? How can ML computation be bridged with inter-machine communication? How can such communication be performed? What should be communicated between machines? By exposing underlying statistical and algorithmic characteristics unique to ML programs but not typically seen in traditional computer programs, and by dissecting successful cases to reveal how we have harnessed these principles to design and develop both high-performance distributed ML software as well as general-purpose ML frameworks, we present opportunities for ML researchers and practitioners to further shape and enlarge the area that lies between ML and systems.

Keywords: Machine learning     Artificial intelligence big data     Big model     Distributed systems     Principles     Theory     Data-parallelism     Model-parallelism    

Model of a Distributed Database Server With Redundant Structure and Its Load Balance

Tian Junfeng,Liu Yuling,Du Ruizhong

Strategic Study of CAE 2004, Volume 6, Issue 6,   Pages 35-42

Abstract:

The technology of redundant services has improved the system availability, but also poses new challenges to the distributed system configuration management. This paper introduces the model of structure and work for a distributed database server system, and discussions are focused on its redundancy relations, model of load balancing based on mobile agent and performance analysis.

Keywords: distributed database     redundancy     load balance     mobile agent     performance analysis    

Pegasus: a distributed and load-balancing fingerprint identification system Article

Yun-xiang ZHAO,Wan-xin ZHANG,Dong-sheng LI,Zhen HUANG,Min-ne LI,Xi-cheng LU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 8,   Pages 766-780 doi: 10.1631/FITEE.1500487

Abstract: Fingerprint has been widely used in a variety of biometric identification systems in the past several years due to its uniqueness and immutability. With the rapid development of fingerprint identification techniques, many fingerprint identification systems are in urgent need to deal with large-scale fingerprint storage and high concurrent recognition queries, which bring huge challenges to the system. In this circumstance, we design and implement a distributed and load-balancing fingerprint identification system named Pegasus, which includes a distributed feature extraction subsystem and a distributed feature storage subsystem. The feature extraction procedure combines the Hadoop Image Processing Interface (HIPI) library to enhance its overall processing speed; the feature storage subsystem optimizes MongoDB’s default load balance strategy to improve the efficiency and robustness of Pegasus. Experiments and simulations are carried out, and results show that Pegasus can reduce the time cost by 70% during the feature extraction procedure. Pegasus also balances the difference of access load among front-end mongos nodes to less than 5%. Additionally, Pegasus reduces over 40% of data migration among back-end data shards to obtain a more reasonable data distribution based on the operation load (insertion, deletion, update, and query) of each shard.

Keywords: Distributed fingerprint identification     Distributed MongoDB     Load balancing    

A distributed stochastic optimization algorithm with gradient-tracking and distributed heavy-ball acceleration Research Articles

Bihao Sun, Jinhui Hu, Dawen Xia, Huaqing Li,huaqingli@swu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 11,   Pages 1463-1476 doi: 10.1631/FITEE.2000615

Abstract: has been well developed in recent years due to its wide applications in machine learning and signal processing. In this paper, we focus on investigating to minimize a global objective. The objective is a sum of smooth and strongly convex local cost functions which are distributed over an undirected network of nodes. In contrast to existing works, we apply a distributed heavy-ball term to improve the convergence performance of the proposed algorithm. To accelerate the convergence of existing distributed stochastic first-order gradient methods, a momentum term is combined with a gradient-tracking technique. It is shown that the proposed algorithm has better acceleration ability than GT-SAGA without increasing the complexity. Extensive experiments on real-world datasets verify the effectiveness and correctness of the proposed algorithm.

Keywords: 分布式优化;高性能算法;多智能体系统;机器学习问题;随机梯度    

Research on the distributed power supply system of the Three Gorges floaters

Li Nianjun

Strategic Study of CAE 2010, Volume 12, Issue 6,   Pages 99-103

Abstract:

The Long River floater is an important threat to the operation security of the Three Gorges ydropower station. This passage is based on the investigation and analysis of the Three Gorges floaters'amount and character, which proposes an ecological power systematic route of the Three Gorges floaters, aking the floaters' power generation as its major route, the treatment of contamination and the eclaim of resources as its two side routes. It can provide more reliable, cleaner high quality power ervice for the clients through the usage of distributed power technology system. The result of this esearch shows that the complete usage of the Three Gorges floaters for the combined supply of cold nd thermoelectricity can realize the treatment of pollution in the Three Gorges reservoir area, eanwhile, the usage of the Three Gorges floaters as resources, the distributed power supply system an deal with 4.7×104~9.5×104 t of floaters annually, which can save the power as the same amount of .3×104~3.6×104 t of standard coal, and the capital investment recovery period for this project asts for 4.5~8 years, which has favorable technology and economic performance.

Keywords: the Three Gorge floaters     pollution     distributed power supply    

Title Author Date Type Operation

Robust distributed model predictive consensus of discrete-time multi-agent systems: a self-triggered approach

Jiaqi Li, Qingling Wang, Yanxu Su, Changyin Sun,jiaqil2018@seu.edu.cn,qlwang@seu.edu.cn,yanxu.su@seu.edu.cn,cysun@seu.edu.cn

Journal Article

Distributed game strategy for unmanned aerial vehicle formation with external disturbances and obstacles

Yang YUAN, Yimin DENG, Sida LUO, Haibin DUAN

Journal Article

High Precision Adaptive Predictive Control for Cruise Missile

Sun Mingwei,Chen Zengqiang,Yuan Zhuzhi,Ren Qiang,Yang Ming

Journal Article

The Application of Multi-agent Based Distributed Intelligent Control in VAV Air Conditioning System

Zhang Hongwei,Wu Aiguo,Sheng Tao

Journal Article

Double access control model of web service based ondistributed simulation system

Chen Xueqin,Wu Huizhong,Zhu Yaoqin

Journal Article

Identification of Time-delay Systems and Correction of NARMA Model

Wng Dongqing

Journal Article

The enlightenment of distributed energy in foreign countries to China

Du Caicai

Journal Article

Containment control for heterogeneous nonlinear multi-agent systems under distributed event-triggered schemes

Ya-ni Sun, Wen-cheng Zou, Jian Guo, Zheng-rong Xiang,xiangzr@njust.edu.cn

Journal Article

Matrix-valued distributed stochastic optimization with constraints

夏子聪,刘洋,卢文联,桂卫华

Journal Article

Remarks on Distributed Energy System

Song Zhiping

Journal Article

Strategies and Principles of Distributed Machine Learning on Big Data

Eric P. Xing,Qirong Ho,Pengtao Xie,Dai Wei

Journal Article

Model of a Distributed Database Server With Redundant Structure and Its Load Balance

Tian Junfeng,Liu Yuling,Du Ruizhong

Journal Article

Pegasus: a distributed and load-balancing fingerprint identification system

Yun-xiang ZHAO,Wan-xin ZHANG,Dong-sheng LI,Zhen HUANG,Min-ne LI,Xi-cheng LU

Journal Article

A distributed stochastic optimization algorithm with gradient-tracking and distributed heavy-ball acceleration

Bihao Sun, Jinhui Hu, Dawen Xia, Huaqing Li,huaqingli@swu.edu.cn

Journal Article

Research on the distributed power supply system of the Three Gorges floaters

Li Nianjun

Journal Article