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78 fs SWCNT-SA mode-locked Tm:CLNGG disordered garnet crystal laser at 2017 nm
Wang, Yicheng,Zhao, Yongguang,Pan, Zhongben,Bae, Ji Eun,Choi, Sun Young,Rotermund, Fabian,Loiko, Pavel,Serres, Josep Maria,Mateos, Xavier,Yu, Haohai,Zhang, Huaijin,Mero, Mark,Griebner, Uwe,Petrov, Val The Optical Society 2018 Optics letters Vol.43 No.17
Jing Bai,Guoguang Wen,Yu Song,Ahmed Rahmani,Yongguang Yu 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.1
The distributed formation control of fractional-order multi-agent systems is mainly studied under directedcommunication graphs in this paper. Firstly, a control law with relative damping and communication delay areproposed. Then, some sufficient conditions for achieving formation control are derived using matrix theory, graphtheory and the frequency domain analysis method. Finally, based on the numerical method of predictor-corrector,several simulations are presented to illustrate the effectiveness of the obtained results.
Xiao-Lin Yuan,Lipo Mo,Yongguang Yu,Guo-Jian Ren 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.7
This paper mainly considers the distributed containment control problem for continuous-time fractionalorder multi-agent systems (FOMASs) with double-integrator, where the control input of each agent is constrained to lie in a nonconvex set. A distributed projection containment control algorithm is designed for each follower. To finish the convergence analysis, the original closed-loop system is first changed into an equivalent one by a proper model transformation and the method of the L1 interpolation approximation is introduced to deal with the projection operator. Then, by using the properties of the convex hull and the Mittag-Leffler function, it is shown that the largest distance between the followers and the convex hull spanned by leaders tends to zero asymptotically, while all agents’ control inputs are constrained to stay in their corresponding nonconvex constraint sets. Finally, numerical simulations are provided to verify the effectiveness of the theoretical results.