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This paper studies the networked estimation of the state of a linear dynamical system. The focus is on developing a distributed estimation algorithm which could achieve the same performance as the centralized ones. A communication protocol which formally describes the network topology is introduced. By performing this protocol, the sum of the information vector contributions is computed, which is...
It is a hot topic to make full use of channel resources in the case of limited hardware resources on the Internet. Channel allocation in multi-interface multi-channel nodes can effectively solve the problem. Extending the single-interface single-channel OLSR protocol to multi-interface multi-channel OLSR protocol and distributed channel negotiation on multiinterface multi-channel OLSR protocol can...
This paper proposes a newly distributed reduced order agreement protocols based on the observer to investigate the consensus problem of high-order multi-agent systems with various agents and non-uniform delay of various time and directed communication topology. First, on the basis of Riccati equation, Lyapunov method, as well as Algebraic-Graph theory, a novel algorithm with multistep, is provided...
The design of Wireless Network Interface Card device driver, based on PCI bus, is the key part of WMN(Wireles Mesh Network). MIPS and uclinux based development environment, Network Interface Card device driver RT2860 oriented are designed and realized. Combining to network protocol of IEEE 802.11, this paper focuses on the initialization, opening, transmission and receive, interrupt handling of RT2860...
The focus of this paper presents a distributed control method based on the gossip communication mechanism that will regulate the voltage of active loads in islanded microgrids. The proposed distributed voltage control (DVC) strategy based on the gossip protocols is fully distributed and by the way of the discrete-time communication; moreover, each active load unit only requires the local voltage and...
In this paper, the distributed fault detection (FD) problem is addressed for a class of linear stochastic multi-agent systems (MASs). A novel distributed cooperative control scheme is given for reaching bounded formation of the MAS. It is proved that by using relative outputs between neighboring agents, a set of distributed fault detection filters can be designed for each agent to detect the faults...
In this work, a method to design STIM for sensor network system is proposed. Hardware selects TMS320F28335 as main controller. A common software implementation method is also presented. Electronic spreadsheet and independent interface configuration is the key research points to realize hot-plug function. After testing, system can be used in electric transmission line leakage current and voltage detection...
At present, there are many problems in infrared technology of the near-field smart meter reading, such as being easily interfered by light, low transmission rate, long meter reading time, short operating distance and so on. To above issues, this paper presents a technical scheme of field meter reading based on Bluetooth technology and broadband carrier instead of infrared technology, and designs an...
This paper studies the almost sure containment via time-varying feedback for a class of stochastic nonlinear multi-agent systems. The systems in question allow serious unknowns in the nonlinearities and control coefficient. For this, a time-varying gain is incorporated to compensate the serous unknowns, where the key idea is to introduce an increasing function which is only dependent on time such...
For a long time, the railway signal system adopts a dedicated closed network without problems such as external intrusion and network virus transmission. However, because of the high-speed and real-time data sharing requirements between the high-speed railway signal system and each subsystem, the network has seen an unprecedented openness. In recent years, with the new virus and attack in industrial...
This paper provides a review of some main works and research progress in distributed optimal consensus problems of multi-agent systems. Classical and common methods in this area are summarized, such as Riccati design, adaptive dynamic programming and inverse optimal control. This paper detailedly addresses the design schemes of optimal consensus protocols by reviewing several typical literatures....
Communication data in the communication network of the islanded micro-grid can be disturbed by many methods, such as data attack or packet loss. In order to overtake the communication data disturbance (CDD), a new hierarchical control structure is proposed in the paper. Based on the concept of cyber physical system (CPS), the control structure is divided into two layers: cyber layer and physical layer...
This technical note is aimed at studying the joint impacts of the system dynamic structure and the communication topology on the synchronization of multi-linear positive systems. Through rigorous analysis, necessary and sufficient conditions are given to guarantee the coupled systems achieving positive synchronization under the distributed control protocol, and the gain matrix designed is related...
The consensus error calculation of the multi-agent systems (MASs) with system noises and communication noises is considered in this paper. Each agent is modeled by a continuous-time linear time-invariant dynamics and the communication topology is described by an undirected graph. It is supposed that the agent can obtain its own state accurately and receive the state of the neighbor agent with noisy...
In this paper, the leader-follower consensus problem for a kind of nonlinear multi-agent systems with general directed communication topologies is studied. For this problem, the dynamics of all agents are identical and nonlinear under the strict form with time-varying exponential growth rate subject to Lipschitz condition constraints. With the aid of the observers of states, a distributed output-based...
The characteristics of four mainstream protocols including Ethernet/IP, Profinet, EtherCAT and Ethernet Powerlink in industrial field network are analyzed respectively in the paper. According to the different requirements of the on-site production line level control system and the internal network of the automation equipment, it is significant to adopt the appropriate network protocol. In the on-site...
In modern industrial control, it is significant to achieve interoperability of state data and control data at field level and service management layer. Therefore, the demand for data exchange and sharing is getting higher and higher. This paper presents a research of the common mainstream network protocols on industrial network architecture of Northbound Interface, then it makes a comprehensive analysis...
In this paper, we present a brief overview concerning consensus of linear multi-agent systems based on event-based control, which is a basic breakthrough to study distributed coordinated control. Motivated by resource constraint in embedded microprocessor of agents, event-based control in consensus of multi-agent systems becomes a research hotspot over these years. Firstly, an investigation is made...
Periodic event-triggered control for the consensus problem of multi-agent systems is investigated in this paper. Triggering conditions are discussed in two cases: 1) with communication between neighbors at each verification time, 2) with communication at triggering times. Based on Lyapunov theory and algebraic graph theory, consensus conditions on the verification period and triggering condition parameters...
Distributed energy resources (DERs) include distributed generations (DGs), distributed energy storages (DESs), and the demand response resources (DRRs). With the increasing penetration of DERs in distribution network, more and more users change from power consumers to prosumers which have great influences on distribution network as well as generate new business models on the demand side. Based on...
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