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51. Adaptive Leader-Following Consensus for Multiple Euler-Lagrange Systems with an Uncertain Leader System

Author

Wang, Shimin and Huang, Jie

Subjects
Electrical Engineering and Systems Science - Systems and Control, Mathematics - Optimization and Control, 93Cxx
Abstract

In this paper, we study the leader-following consensus problem of multiple Euler-Lagrange systems subject to an uncertain leader system. We first establish an adaptive distributed observer for a neutrally stable linear leader system whose system matrix is not known exactly. Under standard assumptions, this adaptive distributed observer can estimate and pass the leader's state to each follower through the communication network of the system without knowing the leader's system matrix exactly. Under the additional assumption that the leader's state is persistently exciting, this adaptive distributed observer can also asymptotically learn the parameters of the leader's system matrix. On the basis of this adaptive distributed observer, we further synthesize an adaptive distributed control law to solve our problem via the certainty equivalence principle. Our result allows the leader-following consensus problem of multiple Euler-Lagrange systems to be solved even if none of the followers knows the system matrix of the leader system exactly.

Published
2019

78. High energy storage efficiency in lead-free perovskite (1-x)(0.3Ba0.85Ca0.15Zr0.1Ti0.9O3-0.7SrTiO3)-xBiMg1/2Ti1/2O3 ceramics with superparaelectric design.

Author

Wang, Shimin, He, Jiayi, Huang, Fengzhen, Zha, Jielin, Hu, Xueli, Yang, Yulong, Ni, Jingyuan, Yang, Wenjin, Shen, Biwei, and Lu, Xiaomei

Abstract

Dielectric capacitors, possessing ultrafast charge–discharge speed and high-power density, have captured increasing attention and extensive research due to their potential applications in pulse power techniques. However, the limited energy density and efficiency hinder their applications in capacitive energy storage. Here, superparaelectric state, which exhibits a high polarization and a nearly nonhysteretic response to an external electric field, was designed by constructing (1-x)(0.3Ba0.85Ca0.15Zr0.1Ti0.9O3-0.7SrTiO3)-xBiMg0.5Ti0.5O3 ternary system to establish a superior comprehensive energy storage system, considering the recoverable energy storage density (Wrec) and efficiency (η), working temperature range and fatigue resistance. A high efficiency of 94.2%, a large Wrec of 4.43 J/cm3 , and thus a superior overall energy storage performance UF of 76.4 were realized in the ceramic with x = 0.3 at 460 kV/cm due to its suitable superparaelectric temperature range (24–126 °C) and the concomitant dynamic disordered polymorphic polar nanoregions. Benefiting from these features, remarkable long-term working and temperature stabilities, high power density of about 143.5 MW/cm3 and fast discharging speed (t0.9 = 58 ns) were also obtained. This work provided an effective strategy in improving the comprehensive energy storage performance of dielectric capacitors especially for realizing high efficiency. [ABSTRACT FROM AUTHOR]

Published
2024
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91. Intelligent Street Lamp Management System

Author

Wang, Shimin, Yang, Yongjie, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Liu, Xin, editor, Na, Zhenyu, editor, Wang, Wei, editor, Mu, Jiasong, editor, and Zhang, Baoju, editor

Published
2020
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