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Fixed-time Group Consensus of Nonlinear Multi-agent Systems via Pinning Control
Lili Hao,Xi-Sheng Zhan,Jie Wu,Tao Han,Huaicheng Yan 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.1
This paper deals with the fixed-time group consensus problem for multi-agent systems (MASs) subjectedto exogenous disturbances. Firstly, two pinning control algorithms are constructed for MASs, which not only reducethe number of controllers but also achieve expected tracking consensus. Secondly, fixed-time group consensusis ensured by utilizing the algebraic graph theory, Lyapunov stability and fixed-time control technique. Finally,simulations are finally given for demonstrate the availability of the derived results.
Optimal Tracking Performance of NCSs with Time-delay and Encoding-decoding Constraints
Jun-Wei Hu,Xi-Sheng Zhan,Jie Wu,Huai-Cheng Yan 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.4
In this paper, the tracking performance of networked control systems (NCSs) under energy constraints with time-delay and encoding-decoding is studied. Through spectral factorization and partial decomposition techniques, we can obtain the explicit representation of the optimal performance. It is shown that the optimal performance is affected by non minimum phase (NMP) zeros, unstable poles and other multiple communication constraints such as time-delay, encoding-decoding and additive white Gaussian noise (AWGN). At the same time, the obtained result shows that a two-parameter compensator is superior to a one-parameter compensator. In addition, it is found that time-delay, encoding-decoding and AWGN affected the tracking capability of NCSs. Finally, an example is given for verifying the correctness of the conclusions.
Bipartite Fixed-time Consensus of Multi-agents System with Disturbance via Event-triggered Control
A-Hao Jiang,Xi-Sheng Zhan,Tao Han,Huai-Cheng Yan 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.7
This paper mainly investigates the bipartite fixed-time consensus problem with or without disturbances of multi-agent systems. Firstly, we propose a novel bipartite fixed-time consensus algorithm based on event-triggered mechanism. Secondly, we use Lyapunov stability theory to guarantee that all agents states can reach a consensus of bipartite fixed-time. Then, the fixed-time stability theory is used to estimate the settling time, which shows that the settling time has nothing to do with the initial state of all agents. Furthermore, it is proved that under this consensus protocol, no zeno behavior is occurred. Finally, two numerical examples are finally presented to illustrate the theoretical analysis correctness.
Scaled Consensus of Disturbed Multi-agent Systems with Output Saturation
Heng Lei,Tao Han,Xi-Sheng Zhan,Jie Wu,Huaicheng Yan 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.10
This paper studies the problem of scaled consensus with output saturation under exogenous disturbances, that is, under exogenous disturbances the state of the agent reaches an assigned proportion, rather than a common value. The main contribution of this work is to propose a new nonlinear protocol, which attenuates the exogenous disturbances by designing a disturbance observer, so that the states of all agents will be proportional to each other. In addition, with the help of integral Lyapunov function, a sufficient condition for the multi-agent system to achieve the scaled consensus with output saturation under exogenous disturbances is obtained under the directed strong connection graph. Finally, a simulation example is given to verify the validity of the results of this work.
Xiao-Feng Zhao,Tao Han,Bo Xiao,Xi-Sheng Zhan,Huaicheng Yan 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.12
This paper investigates the finite-time and fixed-time bipartite consensus tracking (Fin- and Fix-TBCT) problems for second-order multi-agent systems (MASs) under a signed directed communication network, in which both cooperative and competition exist. To achieve bipartite consensus tracking (BCT) within finite time and fixed time, two novel distributed control protocols utilizing integral sliding-mode control concept are presented and discussed, respectively. By virtue of Lyapunov stability and homogeneity with dilation, several sufficient conditions for achieving Fin- and Fix-TBCT for second-order MASs are obtained. Eventually, numerical simulation results are provided to verify the validity of the obtained theoretical results.
Shun-Qi Zhang,Min Chen,Guo-Zhong Zhao,Zhan-Xi Wang,Rüdiger Schmidt,Xian-Sheng Qin 국제구조공학회 2017 Smart Structures and Systems, An International Jou Vol.19 No.6
The complexity of macro-fiber composite (MFC) materials increasing the difficulty in simulation and analysis of MFC integrated structures. To give an accurate prediction of MFC bonded smart structures for the simulation of shape and vibration control, the paper develops a linear electro-mechanically coupled static and dynamic finite element (FE) models based on the first-order shear deformation (FOSD) hypothesis. Two different types of MFCs are modeled and analyzed, namely MFC-d31 and MFC-d33, in which the former one is dominated by the d31 effect, while the latter one by the d33 effect. The present model is first applied to an MFC-d33 bonded composite plate, and then is used to analyze both active shape and vibration control for MFC-d31/-d33 bonded plate with various piezoelectric fiber orientations.