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42nd Chinese control Conference, CCC 2023

作者： Sun, Yanqian Pan, Xuejun Guo, Shiyi School of Control Science and Control Engineering Dalian University of Technology Dalian116024 China

ISBN: (纸本)9789887581543

Ash silos are an important part of thermal power plants. To ensure the safety of the thermal power plant, the failure following an extended period of operation should be monitored early. However, the traditional maintenance planning model suffers from the problem that the planned maintenance date is not synchronized with the equipment failure date, thus causing a waste of human and material resources. Real-time monitoring and diagnosing for ash silo equipment are thus desired to reduce losses. This paper aims to develop an effective method for ash silo fault diagnosis using failure mode and effects analysis (FMEA), fault tree analysis (FTA), and variable weight synthesis theory. The failure mode and effects analysis are used to identify the potential failures of the ash silo and the causes and probabilities of their occurrence. Based on this information, it further builds a fault tree of the ash silo. Finally, it establishes a variable-weight state evaluation system for ash silo based on the variable-weight synthesis theory. The degradation degree is also adopted to evaluate the health state of the ash silo. The experimental results demonstrate that this fault diagnosis method can evaluate the real-time health state of the equipment. Moreover, the developed variable-weight state evaluation model is more accurate than the constant-weight state evaluation model. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Fault detection

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Design of a widely adjustable electrochromic device based on the reversible metal electrodeposition of Ag nanocylinders

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Nano Research 2023年第1期16卷 1421-1429页

作者： Jiangrong Zhou Yuge Han MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China

Structural colors resulting from nanostructured metallic surfaces hold a series of advantages compared to conventional chemical pigments and dyes,such as enhanced durability,tunability,scalability,and low consumption,making them particularly promising for preparing color-tunable ***,once these structures are fabricated,they are almost all passive devices with static nanostructures and fixed optical properties,limiting their potential ***,by using a specially designed array of ordered SiO2 nanoholes as a deposition template in conjunction with the traditional reversible metal electrodeposition device(RMED),we propose a tunable reflective surface where the color of the surface can be changed as a function of the thickness of the deposited Ag nanoparticles(AgNPs).Simplified manufacturability and a large range of color tunability are achieved over previous reports by utilizing the SiO2 nanohole template,which allows the direct deposition of AgNPs while forming an array structure of Ag ***,a further thematic analysis of the physical mechanism in the proposed structure is *** results show that the structural colors induced by the longitudinal localized surface plasmon resonance(LSPR)mode can be dynamically tuned from brown to purple via increasing the deposition ***,in combination with SiO2 nanohole templates of varying parameters,a full gamut of colors spanning the entire visible spectrum is achieved,revealing the feasibility of utilizing the properties of the LSPR mode for satisfying various color *** believe that this LSPRbased multicolor RMED design will contribute to the development of full color information displays and light-modulating devices.

关键词： structural color dynamic color tunability nanocylinder plasmonic nanostructures

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Multi–physical-field characteristics modeling and structure optimization for kW-level ultra-high-speed PM motors with integrated support system

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Chinese Journal of Aeronautics 2023年第4期36卷 455-467页

作者： Qixing GAO Xiaolin WANG Yan ZHANG College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Intelligence Science and Control Engineering Jinling Institute of TechnologyNanjing 211169China

In the aerospace industry,the low-mass ultra-high-speed flywheel system play a critical *** this paper,a kW-level Ultra-High Speed Permanent Magnet Synchronous Motor(UHSPMSM)as the core component of flywheel system is proposed and analyzed with consideration of multiple physical fields,including electromagnetic characteristics,mechanical strength and rotor *** integrated support structure is put forward to improve rotation accuracy and operation stability of the ***,influence of the integrated support structure on critical speed is explored,and the key parameters such as support position and support stiffness are ***,the rotor strength is analyzed by analytical model developed of rotor stress that can deal with multiple boundary *** and thickness of the sleeve are optimized,and range of interference value is accurately limited based on four extreme operating *** 3-D Finite Element Model(FEM)is used to validate the strength characteristics and stress distribu-tion of rotor.A 1.5 kW-150000 r/min UHSPMSM with integrated support system is manufactured and *** feasibility of UHSPMSM proposed and the accuracy of analysis method are verified through electromagnetic,temperature rise and vibration characteristics *** machine prototype realizes the load operation at rated speed and the multi-physical-field characteristics achieve the design specification.

关键词： Flywheel energy storage Integrated support system Multi–physical-field charac-teristics Mechanical strength Rotor dynamics Ultra-high-speed motor

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A Reinforced Particle Swarm Optimization Algorithm Based on Beetle Antenna Search for UAV Path Planning 42

A Reinforced Particle Swarm Optimization Algorithm Based on ...

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42nd Chinese control Conference, CCC 2023

作者： Wang, Liushan Wu, Di Gao, Yongfeng School of Control Science and Control Engineering Dalian University of Technology Dalian116024 China

ISBN: (纸本)9789887581543

Traditional UAV path planning algorithms are difficult to achieve UAV path planning in complex 3-dimensional environments. In this paper, a UAV 3-dimensional path planning algorithm combining particle swarm optimization algorithm and beetle antenna search algorithm is proposed. Tent map inverse learning is introduced to initialize the algorithm, and B-spline curve is used to smooth the final formed paths. Experimental results show that the improved algorithm can obtain better paths faster in complex 3-dimensional environments. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Unmanned aerial vehicles (UAV)

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Trajectory Tracking of Wheeled Mobile Robot Based on Model Predictive control without Terminal Constraints 5

Trajectory Tracking of Wheeled Mobile Robot Based on Model P...

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5th International Conference on Industrial Artificial Intelligence, IAI 2023

作者： Han, Pingping Gao, Yongfeng Gao, Liang Dalian University of Technology School of Control Science and Control Engineering Dalian116024 China

ISBN: (纸本)9798350325294

Model Predictive control(MPC) without terminal constraints can make the controller have higher dynamic performance and less computation. However, how to design a MPC algorithm without terminal constraints for a specific system while ensuring the stability of the system has become a challenging research. In this paper, a feasible form of MPC without terminal constraints is given for nonlinear systems by constructing cost functions and Lyapunov functions. We show that for MPC algorithms without terminal constraints, there is control input to stabilize the system. Then we propose a new trajectory tracking error model based on non-linear the wheeled mobile robot(WMR) system and design a MPC algorithm without terminal constraints under the framework of the model. Finally, the simulation results show that the algorithm can also guarantee the gradual convergence of WMR error tracking system to the origin without terminal constraints. © 2023 IEEE.

关键词： Model predictive control

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The relationship between indoor air quality(IAQ)and perceived air quality(PAQ)-a review and case analysis of Chinese residential environment

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Energy and Built Environment 2024年第2期5卷 230-243页

作者： Jingjing Pei Meinan Qu Luyao Sun Xueyong Wang Yihui Yin Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300072China

Due to the majority of time people spent indoors,indoor air quality is not only critical to people’s health,comfort,but can also significantly influence occupants perception on indoor *** quality is closely related to many factors including thermal parameters,pollutant concentrations,and ventilation ***,the current building indoor air quality evaluation method is based the objective measurement of indoor parameters,without considering occupants’subjective *** paper is aimed at summarizing a profound review on the PAQ evaluation *** among various PAQ evaluating methods with advantages,similarities and differences were *** of literatures about indoor air quality in Chinese residential buildings field is also summarized,and discussion on the subjective influence of temperature and relative humidity,venti-lation performance,volatile organic compounds(VOCs)concentration,and particulate matters on perceived air quality is carried out.

关键词： Perceived air quality Temperature and relative humidity Volatile organic compound Ventilation Particulate matter

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Time-varying formation tracking control of high-order multi-agent systems with multiple leaders and multiplicative noise

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science China(Information sciences) 2024年第12期67卷 191-207页

作者： Ruru JIA Xiaofeng ZONG Qing WANG College of Artificial Intelligence Nankai University School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems School of Automation Science and Electrical Engineering Beihang University

This work discusses the time-varying formation(TVF) tracking control problem of high-order multi-agent systems(MASs) with multiple leaders and multiplicative measurement noise. With the help of Lyapunov function tools and stochastic analysis methods, the TVF tracking protocol with multiple leaders and multiplicative noise is developed based on the relative state measurements, where followers are driven to realize the target TVF while tracking the convex combination formed by multiple leaders. Then, the TVF tracking problem is converted into the mean square asymptotic stability problem of a stochastic differential equation(SDE); sufficient conditions related to the control gains are given by stabilizing the corresponding stochastic system. Moreover, a TVF tracking algorithm is presented to outline the steps of protocol ***, the theoretical results are illustrated in terms of simulation examples.

关键词： multi-agent systems multiple leaders multiplicative measurement noise stochastic differential equation formation tracking control

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Bandgap characteristics analysis and graded design of a novel metamaterial for flexural wave suppression

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 1-24页

作者： Fan YANG Zhaoyang MA Xingming GUO Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China Shanghai Institute of Aircraft Mechanics and Control Shanghai 200092China

A novel elastic metamaterial is proposed with the aim of achieving lowfrequency broad bandgaps and bandgap *** band structure of the proposed metamaterial is calculated based on the Floquet-Bloch theorem,and the boundary modes of each bandgap are analyzed to understand the effects of each component of the unit cell on the bandgap *** is found that the metamaterials with a low elastic modulus of ligaments can generate flexural wave bandgaps below 300 ***-frequency vibrations can be suppressed through the selective manipulation of *** dual-graded design of metamaterials that can significantly improve the bandgap width is proposed based on parametric studies.A new way that can regulate the bandgap is revealed by studying the graded elastic modulus in the *** results demonstrate that the nonlinear gradient of the elastic modulus in the substrate offers better bandgap *** on these analyses,the proposed elastic metamaterials can pave the way for multi-frequency vibration control,low-frequency bandgap broadening,and bandgap tuning.

关键词： metamaterial flexural wave bandgap local resonance graded design

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Roles of nanoparticles in arsenic mobility and microbial community composition in arsenic-enriched soils

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Journal of Environmental sciences 2024年第4期138卷 301-311页

作者： Ting Luo Qining Zheng Jie Yu Weihao Liang Yan Sun Guixiang Quan Feng Zhou School of Environmental Science and Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Provincial Key Laboratory of Coastal Ecology and Pollution Control Yancheng 224051China School ofEnvironment and Civil Engineering Jiangnan UniversityWuxi 214122China

Environmental effects of nano remediation engineering of arsenic(As)pollution need to be *** this study,the roles of Fe_(2)O_(3)and TiO_(2)nanoparticles(NPs)on the microbial mediated As mobilization from As contaminated soil were *** addition of Fe_(2)O_(3)and TiO_(2)NPs restrained As(V)release,and stimulated As(Ⅲ)***(V)concentration decreased by 94% and 93% after Fe_(2)O_(3)addition,and decreased by 89% and 45% after Ti O_(2)addition compared to the Biotic and Biotic+Acetate(amended with sodium acetate)controls,*** maximum values of As(Ⅲ)were 20.5 and 27.1μg/L at 48 d after Fe_(2)O_(3)and TiO_(2)NPs addition,respectively,and were higher than that in Biotic+Acetate control(12.9μg/L).The released As co-precipitated with Fe in soils in the presence of Fe_(2)O_(3)NPs,but adsorbed on TiO_(2)NPs in the presence of TiO_(2)***,the addition of NPs amended with sodium acetate as the electron donor clearly promoted As(V)reduction induced by *** NPs addition changed the relative abundance of soil bacterial community,while Proteobacteria(42.8%-70.4%),Planctomycetes(2.6%-14.3%),and Firmicutes(3.5%-25.4%)were the dominant microorganisms in *** potential As/Fe reducing bacteria were related to Pseudomonas,Geobacter,Desulfuromonas,and *** addition of Fe_(2)O_(3)and TiO_(2)NPs induced to the decrease of arr A *** results indicated that the addition of NPs had a negative impact on soil microbial population in a long *** findings offer a relatively comprehensive assessment of Fe_(2)O_(3)and TiO_(2)NPs effects on As mobilization and soil bacterial communities.

关键词： Fe_(2)O_(3)and TiO_(2)nanoparticles Arsenic reduction Mobilization Functional gene Microbial community

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Event-based sliding mode control under denial-of-service attacks

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science China(Information sciences) 2022年第6期65卷 125-141页

作者： Yingxin TIAN Xiang LI Bo DONG Yabin GAO Ligang WU Department of Control Science and Engineering Harbin Institute of Technology School of Software Harbin Institute of Technology

This paper deals with the problem of estimator-based sliding mode control against denial-of-service(DoS) attacks and discrete events via a time-delay approach. A networked system is considered an uncertain dynamical system with matched and mismatched perturbations and exogenous disturbance in the network environment. A network-resource-aware event-triggering mechanism is designed with aperiodically releasing system measurements. Furthermore, to describe the DoS attack duration and inter-event time, a time-delay modeling approach considers the DOS attack duration and inter-event time as a “time delay” of the measurements between the sensor and controller over the network is proposed. Consequently, an intervaltime-delay system with uncertainties is formulated. A state-observer-based sliding mode controller, by which the ideal sliding mode can be achieved, is proposed against the DoS attacks. The resulting sliding motion is proved to be robust and stable with an Lgain performance. Finally, the effectiveness and applicability of the present sliding mode control are validated in a simulated pendulum system.

关键词： sliding mode control time delay uncertain system state observer event trigger

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