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High-Order Fully Actuated System Models for Strict-Feedback Systems With Increasing Dimensions

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IEEE/CAA Journal of Automatica Sinica 2024年第12期11卷 2451-2462页

作者： Xiang Xu guang-Ren Duan Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology the School of System Design and Intelligent Manufacturing Southern University of Science and Technology

This paper mainly addresses control problems of strict-feedback systems(SFSs) with increasing dimensions. Compared with the commonly-considered SFSs where the subsystems have the same dimension, we aim to handle more complex cases,i.e., the subsystems in the considered SFSs are assumed to have increasing dimensions. By transforming the systems into highorder fully-actuated system(HOFAS) models, the stabilizing controllers can be directly given. Besides first-order SFSs, secondorder and high-order SFSs are also considered.

关键词： Increasing dimensions high-order fully-actuated system nonlinear systems strict-feedback systems

Analysis of the Low-Lying Spectra of Five-Nucleon Systems

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Chinese Physics Letters 2000年第7期17卷 485-487页

作者： BAO Cheng-guang Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Department of Physics Zhongshan UniversityGuangzhou 510275(mailing address)

The wavefunctions are decomposed into components. The inherent nodal structure and the stability of these components are investigated. It is assumed that the low-lying states would be dominated by the components without inherent nodal surfaces. Based on this assumption, the composition of the wave functions of the low-lying states of 5He has been suggested and the qualitative feature of the spectrum has been explained.

关键词： nodal assumed qualitative

Background of Existence of the Two Low-Lying Adjacent 4^(+) Narrow Resonances in ^(16)O Nucleus and Other 4-Boson Systems

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Chinese Physics Letters 2001年第5期18卷 638-640页

作者： BAO Cheng-guang Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Department of Physics Zhongshan UniversityGuangzhou 510275

Based on an analysis of the inherent nodal structures of wave functions of 4-boson systems,we found that the internal energy of the 4_(1)^(+) state should be lower because its structure can be optimized without suffering a strong constraint arising from symmetry(while other 1≤L≤3 states suffer from this kind of constraints).Furthermore,two superior structures favorable in binding are found to be allowed to be possessed by 4^(+) *** findings would lead to the appearance of two adjacent 4^(+) states,as a common feature,in the low-lying spectra of 4 boson systems.

关键词： allowed Existence symmetry

Fully Actuated System Approach for 6DOF Spacecraft Control Based on Extended State Observer

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Journal of Systems Science & Complexity 2022年第2期35卷 604-622页

作者： ZHAO Qin DUAN guang-Ren Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China

This paper deals with the problem of position and attitude tracking control for a rigid spacecraft.A fully actuated system(FAS)model for the six degree-of-freedom(6DOF)spacecraft motion is derived first from the state-space model by variable *** the uncertainties from external disturbance,unknown motion information,and uncertain inertia properties,an extended state observer(ESO)is designed to estimate the total ***,a tracking controller based on FAS approach is designed,and this makes the closed-loop system a constant linear one with an arbitrarily assignable *** solution to the parameter matrices of the observer and controller is given *** is proved via the Lyapunov stability theory that the observer errors and tracking errors both converge into the neighborhood of the ***,numerical simulation demonstrates the effectiveness of the proposed controller.

关键词： Constant linear closed-loop system extended state observer fully actuated system approach relative position and attitude control

Estimates for Vector-valued Commutators on Weighted Morrey Space and Applications

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Acta Mathematica Sinica,English Series 2013年第5期29卷 883-896页

作者： Shao guang SHI School of Science Linyi University School of Mathematical Sciences Beijing Normal University

In this paper, we introduce weighted vector-valued Morrey spaces and obtain some estimates for vector-valued commutators on these spaces. Applications to CalderSn-Zygmund singular integral operators, oscillatory singu... 详细信息

关键词： Weighted Morrey space vector-valued commutator Ap weights

Analysis of vibration and frequency transmission of high speed EMU with flexible model

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Acta Mechanica Sinica 2014年第6期30卷 876-883页

作者： Zun-Song Ren guang Yang Shan-Shan Wang Shou-guang Sun School of Mechanical Electronic & Control EngineeringBeijing Jiaotong University

When the operation speed of the high-speed train increases and the weight of the carbody becomes lighter,not only does the sensitivity of the wheel/rail contact get higher,but also the vibration frequency range of the vehicle system gets enlarged and more frequencies are transmitted from the wheelset to the *** is important to investigate the vibration characteristics and the dynamic frequency transmission from the wheel/rail interface to the carbody of the high-speed electric multi-uint（EMU）.An elastic highspeed vehicle dynamics model is established in which the carbody,bogieframes,and wheelsets are all dealt with as flexible body.A rigid high-speed vehicle dynamics model is set up to compare with the simulation results of the elastic *** the rigid vehicle model,the carbody,bogieframes and wheelsets are treated as rigid component while the suspension and structure parameters are the same as used in the elastic *** dynamic characteristic of the elastic high speed vehicle is investigated in time and frequency domains and the di ff erence of the acceleration,frequency distribution and transmission of the two types of models are *** results show that the spectrum power density of the vehicle decreases from the wheelset to the carbody and the acceleration transmission ratio is approximately from 1%to 10%for each suspension *** frequency of the wheelset rotation is evident in the vibration of the flexible model and is transmitted from the wheelset to the bogieframe and to *** results of the flexible model are more reasonable than that of the rigid model.A field test data of the high speed train are presented to verify the simulation *** shows that the simulation results are coincident with the field test data.

关键词： High-speed EMU Vibration transmission Flexible model Acceleration Power spectrum density

Fully Actuated System Approach for Linear Systems Control:A Frequency-Domain Solution

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Journal of Systems Science & Complexity 2022年第6期35卷 2046-2061页

作者： DUAN guang-Ren ZHOU Bin The Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055China The Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China

This note studies fully actuated linear systems in the frequency domain in terms of polynomial matrix description(PMD).For a controllable first-order linear state-space system model,by using the right coprime factorization of its transfer function matrix,under the condition that the denominator matrix in the right coprime factorization is column reduced,it is equivalently transformed into a fully actuated PMD model,whose time-domain expression is just a high-order fully actuated(HOFA)system *** method is a supplement to the previous one in the time-domain,and reveals a connection between the controllability of the first-order linear state-space system model and the fullactuation of its PMD *** continuous-time and discrete-time linear systems are *** numerical examples are worked out to illustrate the effectiveness of the proposed approaches.

关键词： Column reduced factorization first-order linear state-space systems high-order fully actuated systems polynomial matrix description right coprime

Development of Genome-Wide Scan for Selection Signature in Farm Animals

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Journal of Integrative Agriculture 2013年第8期12卷 1461-1470页

作者： ZHANG Wen-guang College of Animal Science Inner Mongolia Agricultural University Kunming Institute of Zoology Chinese Academy of Sciences Institute of ATCG Nei Mongol Bio-Information

Identifying targets of positive selection in farm animals has, until recently, been frustratingly slow, relying on the analysis of individual candidate genes. Genomics, however, has provided the necessary resources to systematically interrogate the entire genome for signatures of selection. This review described important recent results derived from the application of genome-wide scan to the study of genetic changes in farm animals. These included findings of regions of the genome that showed breed differentiation, evidence of selective sweeps within individual genomes and signatures of demographic events. Particular attention is focused on the study of the implications for domestication. To date, sixteen genome-wide scans for recent or ongoing positive selection have been performed in farm animals. A key challenge is to begin synthesizing these newly constructed maps of selection into a coherent narrative of animal breed evolutionary history and derive a deeper mechanistic understanding of how animal populations improve or evolve. The major insights from the surveyed studies are highlighted and directions for future study are suggested.

关键词： selection signature population genomics genome-wide animal breeding

The Berry-Esseen bound for identically distributed random variables by Stein method

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Applied Mathematics(A Journal of Chinese Universities) 2012年第4期27卷 455-461页

作者： CAI guang-hui Department of Mathematics Zhejiang Gongshang UniversityHangzhou 310018China

In this paper, we obtain the Berry-Esseen bound for identically distributed random variables by Stein method. The results obtained generalize the results of Shao and Su （2006） and Stein （1986）.

关键词： Berry-Esseen bound Stein method exchangeable pair.