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Distributed Optimal Control of Nonlinear Time-Delay System Subject to Delayed Measurements and Communication Disruptions

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Journal of Systems Science & Complexity 2021年第4期34卷 1426-1437页

作者： SU Baili duan Yuxing College of Engineering Qu/il Normal UniversityRizhao 276826China

This paper is focused on a distributed optimal control design for a class of nonlinear timedelay systems with delayed measurements and communication *** innovation lies in three *** distributed optimal control method which includes an optimal controller and a bounded controller is designed based on Lyapunov *** availability of data transmitted through the communication channel depends on a feasibility *** a sufficient condition to guarantee ultimate boundedness of the system is given based on appropriate *** significance of this paper is that this distributed optimal control method is applied to time-delay ***,a simulation example is given to verify the effectiveness of the proposed method.

关键词： Communication disruptions delayed measurements distributed optimal control nonlinear time-delay systems

A multi-strategy pigeon-inspired optimization approach to active disturbance rejection control parameters tuning for vertical take-off and landing fixed-wing UAV

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Chinese Journal of Aeronautics 2022年第1期35卷 19-30,I0001页

作者： Hangxuan HE Haibin duan State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China Peng Cheng Laboratory Shenzhen 518000China

In this *** Disturbance Rejection Control(ADRC)is utilized in the pitch control of a vertical take-off and landing fixed-wing Unmanned Aerial Vehicle(UAV)to address the problem of height fluctuation during the transition from hover to level *** the difficulty of parameter tuning of ADRC as well as the requirement of accuracy and rapidity of the controller,a Multi-Strategy Pigeon-Inspired Optimization(MSPIO)algorithm is *** Swarm Optimization(PSO),Genetic Algorithm(GA),the basic Pigeon-Inspired Optimization(PIO),and an improved PIO algorithm CMPIO are *** addition,the optimized ADRC control system is compared with the pure Proportional-Integral-Derivative(PID)control system and the non-optimized ADRC control *** effectiveness of the designed control strategy for forward transition is verified and the faster convergence speed and better exploitation ability of the proposed MSPIO algorithm are confirmed by simulation results.

关键词： Active Disturbance Rejection Control(ADRC) Pigeon-inspired optimization algorithm Transition mode Unmanned Aerial Vehicle(UAV) Vertical take-off and landing

Parametric output regulation using observer-based PI controllers with applications in flexible spacecraft attitude control

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Science China(Information Sciences) 2021年第7期64卷 148-164页

作者： Guangren duan Tianyi ZHAO Center for Control Theory and Guidance Technology Harbin Institute of Technology

A parametric multiobjective design approach based on a proportional-integral(PI) controller and a full-state observer is proposed for output regulation in a multivariable linear system. First, a complete parametric form of the observer-based PI control law is established, which yields a closed-loop system with the desired eigenstructure and ensures that the regulated output asymptotically tracks a given constant signal in the presence of constant but unknown disturbances. All design degrees of freedom are preserved and characterized using a set of parameter vectors. Second, a separation principle of eigenvalue sensitivities is proven, and based on this result, the parameters of the closed-loop system are comprehensively optimized to reduce the eigenvalue sensitivity and the control gain, and also to enhance the tolerance to time-varying disturbances. Finally, the proposed method is applied to attitude control of a flexible spacecraft. Moreover,numerical simulations based on practical engineering parameters are performed to verify the superiority of the proposed method over traditional proportional-integral-derivative(PID) control methods.

关键词： parametric control system design multiobjective design observer-based control separation principle PI regulator constant signal tracking disturbance decoupling and attenuation

Stabilization Controller of An Extended Chained Nonholonomic System With Disturbance:An FAS Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1262-1273页

作者： Zhongcai Zhang Guangren duan School of Engineering Qufu Normal UniversityRizhao 276826China Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055 Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China

This study examines the stabilization issue of extended chained nonholonomic systems(ECNSs)with external *** the existing approaches,we transform the considered system into a fully actuated system(FAS)model,simplifying the stabilizing controller *** implement a separate controller design and propose exponential stabilization controller and finite-time stabilization controller under finite-time disturbance observer(FTDO)for the two system *** addition,we discuss the specifics of global stabilization control *** approach demonstrates that two system states exponentially or asymptotically converge to zero under the provided switching stabilization control strategy,while all other system states converge to zero within a finite time.

关键词： design stabilization system

A new technique to identify the handedness of single nanomaterial

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Science China Chemistry 2022年第3期65卷 423-424页

作者： Pengfei duan CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and Technology(NCNST)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Chirality is an elemental property in living matter and nature,and it can be observed at various hierarchical levels from subatomic and molecular to supramolecular,nanoscopic,macroscopic,and galactic scale[1].Nowadays,nanoscalechiral substances attract much attention due to their unique ***,carbon nanotubes,a prototypical one-dimensional material with fascinating physical properties and significant applications[2].

关键词： properties property material

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Petroleum Science 2017年第3期14卷 484-492页

作者： Taizhong duan Petroleum Exploration and Production Research Institute Sinopec 31 Xueyuan Road Haidian District Beijing 100083China

This paper presents a unique and formal method of quantifying the similarity or distance between sedimentary facies successions from measured sections in outcrop or drilled wells and demonstrates its first application in inverse stratigraphic modeling. A sedimentary facies succession is represented with a string of symbols, or facies codes in its natural vertical order, in which each symbol brings with it one attribute such as thickness for the facies. These strings are called attributed strings. A similarity measure is defined between the attributed strings based on a syntactic pattern-recognition technique. A dynamic programming algorithm is used to calculate the similarity. Inverse stratigraphic modeling aims to generate quantitative 3D facies models based on forward stratigraphic modeling that honors observed datasets. One of the key techniques in inverse stratigraphic modeling is how to quantify the similarity or distance between simulated and observed sedimentary facies successions at data locations in order for the forward model to condition the simulation results to the observed dataset such as measured sections or drilled wells. This quantification technique comparing sedimentary successions is demonstrated in the form of a cost function based on the defined distance in our inverse stratigraphic modeling implemented with forward modeling optimization.

关键词： Similarity quantification Sedimentarysuccession Inverse stratigraphic modeling Globaloptimilization Syntactic approach

Open-loop Phase Synchronization Method of Positive and Negative Sequences for Three-phase Asymmetric Grid

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CSEE Journal of Power and Energy Systems 2023年第5期9卷 1973-1979页

作者： Jian He Shanxu duan State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Currently,a grid-connected inverter is required to inject a dual-sequence current during asymmetric grid sags,which means both positive and negative sequence phases should be *** paper proposes an open-loop phase synchronization(OLS)method of positive and negative sequences for an asymmetric grid based on the moving average filter(MAF),which does not need to separate the positive and negative sequence fundamental components of grid *** a benefit,there is no double-frequency oscillation in the estimated phases at offnominal frequencies since the positive and negative sequence phases are obtained *** proposed method not only has the inherent advantages of OLS,but also further improves the dynamic response since the window length of MAF is only 1/6 of the fundamental *** effectiveness of the proposed OLS is verified by experimental results.

关键词： Asymmetric grid open-loop synchronization positive and negative sequence phases

Exponential L1 Filtering of Networked Linear Switched Systems:An Event-Triggered Approach

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Journal of Systems Science & Complexity 2020年第2期33卷 383-400页

作者： duan Dandan ZONG Guangdeng School of Engineering Qufu Normal UniversityRizhao 276826China

The issues of event-triggered exponential L1 filtering are studied for a class of networked linear switched *** event-triggered mechanism is proposed to enhance resource utilization in transmission,and save the communication cost of systems as ***,the filtering error system is reconstructed as a switched delay system with bounded disturbance through the input delay system *** resorting to the Lyapunov-Krasovskii functional approach and the average dwell time(ADT)technique,some interesting results are derived to guarantee the exponential stability with a prescribed L1 disturbance rejection ***,an event-triggered exponential L1 filter is designed via solving a set of feasible linear matrix inequalities(LMIs).Finally,the efficiency of the proposed results is verified through a numerical example and a PWM-driven boost converter circuit system.

关键词： Exponential L1 filtering exponential stability event-triggered mechanism networked linear switched systems

Coupled Dynamics and Integrated Control for Position and Attitude Motions of Spacecraft:A Survey

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IEEE/CAA Journal of Automatica Sinica 2023年第12期10卷 2187-2208页

作者： Feng Zhang Guangren duan the Research and Development Center China Academy of Launch Vehicle TechnologyBeijing 100076China IEEE the Center for Control Science and Technology Southern University of Science and TechnologyShenzhen 518055 the Center for Control Theory and Guidance Technology Harbin Institute of TechnologyHarbin 150001China

Inspired by the integrated guidance and control design for endo-atmospheric aircraft,the integrated position and attitude control of spacecraft has attracted increasing attention and gradually induced a wide variety of study results in last over two decades,fully incorporating control requirements and actuator characteristics of space *** paper presents a novel and comprehensive survey to the coupled position and attitude motions of spacecraft from the perspective of dynamics and *** this end,a systematic analysis is firstly conducted in details to show the position and attitude mutual couplings of ***,in terms of the time discrepancy between spacecraft position and attitude motions,space missions can be categorized into two types:space proximity operation and space orbital *** on this classification,the studies on the coupled dynamic modeling and the integrated control design for position and attitude motions of spacecraft are sequentially summarized and *** the one hand,various coupled position and dynamic formulations of spacecraft based on various mathematical tools are reviewed and compared from five aspects,including mission applicability,modeling simplicity,physical clearance,information matching and *** the other hand,the development of the integrated position and attitude control of spacecraft is analyzed for two space missions,and especially,five distinctive development trends are captured for space operation ***,insightful prospects on future development of the integrated position and attitude control technology of spacecraft are proposed,pointing out current primary technical issues and possible feasible solutions.

关键词： Coupled position and attitude dynamic modeling integrated position and attitude control position and attitude coupling analysis spacecraft space missions