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Performance Analysis of Information Time-delay Systems with Bandwidth Constraints and Channel Noise
Xiangchen Du,Xisheng Zhan,Qingsheng Yang,Huaicheng Yan 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.12
In this paper, the performance limitation of information time-delay systems under bandwidth and channel noise constraints are investigated. The channel noise is assumed to be Gaussian white noise and obtain the expression of the performance limitation is obtained using spectrum decomposition and partial factorization techniques. The result shows that the performance limitation depends on the given system’s unstable zeros, time delay and non-minimum phase zero. Moreover, other communication constraints such as the bandwidth and Gaussian white noise also impact performance. Finally, the theoretical result is verified through a simulation.
Jie Cheng,Xisheng Zhan,Jie Wu,Huaicheng Yan 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.1
In this paper, the adaptive bipartite output containment problem is investigated, for a signed graph of heterogeneous multi-agent systems (HMASs). An adaptive state feedback algorithm and an output feedback algorithm are designed to ensure that cooperative and antagonistic agents enter different convex hull. A novel protocol is proposed for heterogeneous systems to deal with the bipartite output containment problem, where only the leader’s neighbours can learn the leader’s system matrix without all followers. Then, based on output regulation approach, Lyapunov stability analysis and some other methods guarantee that the bipartite output containment control problem is implemented. Finally, the validity of our analytical results is verified by the numerical simulations provided.
Mengxi Jiang,Xisheng Zhan,Jie Wu,Tao Han,Huaicheng Yan 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.6
In this paper, the optimal tracking performance of communication constrained systems by considering quantization, packet dropouts, noise and control input power constraints is studied. The frequency domain method is utilized to analyze the optimal tracking performance of the communication constrained systems. The explicit expression of the optimal tracking performance is deduced by partial fraction decomposition method and innerouter factorization method. The results indicate that the optimal tracking performance for a controlled object is only affected by the plant’s inherent characteristics (non-minimum phase zeros and unstable poles) and network factors (quantization, packet dropouts and noise). Eventually, a simulation is offered to validate the theory.
Zihan Liu,Xisheng Zhan,Jie Wu,Tao Han,Huaicheng Yan 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.11
This study researches the bipartite containment control problem of heterogeneous linear multi-agent systems under a signed digraph. The bipartite containment problem can be viewed as the output regulation problem by devising a compensator. By distributing a coupling weight which is time-varying to each follower, the adaptive protocols are proposed. Thus, we propose the distributed dynamic state feedback and output feedback protocols in conjunction with adaptive control, by which followers will converge to the convex hull crossed by leaders. Additionally, based on the utilization of the Lyapunov function approach, some extensive criteria are deduced to guarantee the bipartite containment of heterogeneous multi-agent system. The final simulations demonstrate the viability of the theoretical results.
Yukun Shu,Xiaoli Ruan,Xisheng Zhan 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.10
This article investigates the global O(t-ρ) synchronization problem for multiple fractional-order neural networks (MFNNs) with time delay. By utilizing the unique properties of fractional-order calculus, namely hereditary and infinite memory, a new design scheme of the event-triggered non-Laplacian coupling control strategy is proposed. Compared with the Laplacian coupling matrix, non-Laplacian coupling matrix nondiagonal elements can be arbitrary and row sums can be same nonzero constant. With the introduced rules, by using a Razumikhin-type method, some less conservative sufficient conditions are derived to assure the global O(t-ρ) synchronization of MFNNs with time delay. Furthermore, in order to prohibit Zeno behavior in the MFNNs with time delay, lower bounds of two consecutive events are also gathered. Finally, simulation results verify the validity of the analysis.
Zijing Li,Jie Wu,Xisheng Zhan,Tao Han,Huaicheng Yan 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.5
Distributed second-order finite-time adaptive containment and bipartite containment control are investigated for multi-agent system with disturbance and nonlinear function under undirected graph in this paper. Firstly, two controllers are designed to achieve finite-time adaptive containment and bipartite containment control, which both based on terminal sliding mode. Then, desired finite-time containment and bipartite containment protocols are proposed and settling time can be estimated. It is proved that settling time of finite-time containment is associated to initial state. Feasibility of theory is proved by simulation experiments.
Na Zhao,Jie Wu,Xisheng Zhan,Tao Han,Huaicheng Yan 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.3
In this paper, the problem of leader-following distributed guaranteed-performance consensus for multiagent systems (MASs) subject to exogenous disturbances is investigated. First, a disturbance observer is designedfor each follower, which can be used to efficiently estimate the external disturbances. Next, an adaptive distributedstate feedback consensus protocol with guaranteed performance constraints is proposed based on the above proposed observer. Most of the existing literature on guaranteed performance does not consider unknown disturbances. Unlike existing schemes, consensus control with fully distributed guaranteed-performance is accomplished usingthis protocol, which solves the consensus control problem of exogenous disturbances. The consensus criterion ofadaptive guaranteed-performance is given by using Riccati inequality, and the adjustment method of consensuscontrol gain is given by using linear matrix inequality for leader-following situation. At last, the derived analyticalresults are validated by presenting a simulation example.
Xiaoyi Zhang,Jie Wu,Xisheng Zhan,Tao Han,Huaicheng Yan 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.12
In this paper, the bipartite time-varying formation tracking (BTVFT) problem is studied for multi-agent system (MAS) with the state of agents is unpredictable and a tracking leader of unknown bounded control input. Based on available states and unavailable states, a innovative kind of adaptive BTVFT protocols for MAS is respectively proposed in this article. Then by using Lyapunov stability theory, the result implies that under the appropriate assumptions, one group of followers will trace the leader agent and achieve given formation, while another group of followers will accomplish a given formation at the opposite to the origin. Furthermore, simulation example is represented to validate the performance and effectiveness of the design techniques.
Qianhao Li,Qingsheng Yang,Xisheng Zhan,Jie Wu 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.2
In this paper, we investigate the optimal regulation performance of networked time delay systems with limited bandwidth and interference signals. Communication networks are primarily influenced by parameters including bandwidth, packet dropouts, coding and decoding, interference signals, and channel noise. For a given system, non-minimum phase zeros, unstable poles, and time delay are considered. The corresponding regulation performance expressions are derived using coprime decomposition, spectral decomposition techniques, and norm correlation theory in the frequency domain. Results indicate that regulation performance is dependent on the location and direction of non-minimum phase zeros and unstable poles of a given system, as well as the internal time delay of the controlled plant. In addition, network communication parameters such as bandwidth, channel noise, packet dropouts, and external interference signals influence the performance of the regulation. Finally, simulation examples are provided to demonstrate the theory’s validity.
An Approach for the Stability of Communication Constrained Networked Time-delay Control Systems
Siwei Qiao,Qingsheng Yang,Jie Wu,Xisheng Zhan,Huaicheng Yan 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.4
This paper aims to solve the stability problem of networked time-delay systems by frequency-domain analysis. The communication network quality is affected by bandwidth, noise, and packet dropouts. The main techniques are spectral decomposition and frequency-domain analysis. By means of utilizing those techniques, the expression of minimum signal-to-noise ratio which stabilizes the networked time-delay systems is obtained. Further, it is shown that the minimum value of system stability depends on the certain constraints (bandwidth and packet dropout probability) of communication channel, the position of unstable poles and the non-minimum phase zeros of given model. Moreover, an acquired result clearly brings out the contact among the status of the researched system, communication channel parameters, and the structural property of the considered model. Some simulation examples are given to provide validation of the final result.