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Frontiers of Information Technology & Electronic Engineering 2019年第1期20卷 120-130页

作者： Xujun LYU Long DI Zongli LIN College of Engineering Huazhong Agricultural University asml-HMI Charles L.Brown Department of Electrical and Computer Engineering University of Virginia

A characteristic model based all-coefficient adaptive control law was recently implemented on an experimental test rig for high-speed energy storage flywheels suspended on magnetic bearings. Such a control law is an intelligent control law, as its design does not rely on a pre-established mathematical model of a plant but identifies its characteristic model while the plant is being controlled. Extensive numerical simulations and experimental results indicated that this intelligent control law outperforms a μ-synthesis control law, originally designed when the experimental platform was built in terms of their ability to suppress vibration on the high-speed test rig. We further establish, through an extensive simulation, that this intelligent control law possesses considerable robustness with respect to plant uncertainties, external disturbances, and time delay.

关键词： Intelligent control Robustness Uncertainty Disturbance rejection Active magnetic bearings Energy storage flywheels

Characteristic model based all-coefficient adaptive control of an AMB suspended energy storage flywheel test rig

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Science China(Information Sciences) 2018年第11期61卷 113-127页

作者： Xujun LYU Long DI Zongli LIN Yefa HU Huachun WU School of Mechanical and Electronic Engineering Wuhan University of Technology Hubei Provincial Engineering Technology research Center for Magnetic Suspension asml-HMI 1762 Automation Pkwy 4. Charles L.Brown Department of Electrical and Computer Engineering University of Virginia

Feedback control of active magnetic bearing(AMB) suspended energy storage flywheel systems is critical in the operation of the systems and has been well studied. Both the classical proportional-integralderivative(PID) control design method and modern control theory, such as H∞ control and μ-synthesis,have been explored. PID control is easy to implement but is not effective in handling complex rotordynamics. Modern control design methods usually require a plant model and an accurate characterization of the uncertainties. In each case, few experimental validation results on the closed-loop performance are available because of the costs and the technical challenges associated with the construction of experimental test *** this paper, we apply the characteristic model based all-coefficient adaptive control(ACAC) design method for the stabilization of an AMB suspended flywheel test rig we recently constructed. Both simulation and experimental results demonstrate strong closed-loop performance in spite of the simplicity of the control design and implementation.

关键词： adaptive control characteristic modeling energy storage flywheels active magnetic bearings

Bubble Dynamics and Heat Transfer on Biphilic Surfaces:Experiments and Numerical Simulation

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Journal of Bionic Engineering 2020年第4期17卷 809-821页

作者： Pedro Pontes Ricardo Cautela Emanuele Teodori Ana Sofia Moita Anastasios Georgoulas António Luís Nobre Moreira Moreira IN+-Center for Innovation Technology and Policy ResearchDepartment of Mechanical EngineeringInstituto Superior TécnicoUniversidade de LisboaAv.Rovisco Pais1049-001 LisboaPortugal asml Holding N.V. De Run 65015504 DRVeldhovenThe Netherlands Department of Exact Sciences and Engineering Portuguese Military AcademyR.Gomes Freire2031169-203 LisboaPortugal Advanced Engineering Centre School of ComputingEngineering and MathematicsCockcroft BuildingLewes RoadUniversity of Brighton BN24GJUK

Wettability is known to play a major role in enhancing pool boiling heat *** this context bioinspired surfaces can bring significant advantages in pool boiling *** work addresses a numerical investigation of bubble growth and detachment on a biphilic surface pattern,namely in a superhydrophobic region surrounded by a hydrophilic *** characteristics resemble bioinspired solutions explored in our research group,mainly considering the main topographical *** numerical approach is intended to provide additional information to an experimental approach,allowing to obtain temperature,pressure and velocity fields in and around the bubble,which help to describe bubble *** model was validated based on experimental data obtained with extensive image processing of synchronized high-speed video and high-speed thermographic *** results obtained here clearly evidence that combining enhanced direct numerical simulations with high-resolution transient experimental measurements is a promising tool to describe the complex and intricate hydrodynamic and heat transfer phenomena governing pool boiling on heated biphilic surfaces.

关键词： bioinspired biphilic surfaces bubble dynamics two-phase heat transfer time resolved infrared thermography CFD model

Non-isoplanatic lens aberration correction in dark-field digital holographic microscopy for semiconductor metrology

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Light(Advanced Manufacturing) 2023年第4期4卷 117-129页

作者： Tamar van Gardingen-Cromwijk Sander Konijnenberg Wim Coene Manashee Adhikary Teus Tukker Stefan Witte Johannes F.de Boer Arie den Boef Department of Physics and Astronomy and LaserLaBVrije UniversiteitDe Boelelaan 10811081 HV AmsterdamThe Netherlands Advanced research Center for Nanolithography(ARCNL) Science Park 1061098 XG AmsterdamThe Netherlands asml Netherlands B.V. De Run 65015504 DRVeldhovenThe Netherlands Department Imaging Physics Delft University of TechnologyVan der Maasweg 92629 HZ DelftThe Netherlands

In the semiconductor industry,the demand for more precise and accurate overlay metrology tools has increased because of the continued shrinking of feature sizes in integrated *** achieve the required sub-nanometre precision,the current technology for overlay metrology has become complex and is reaching its ***,we present a dark-field digital holographic microscope using a simple two-element imaging lens with a high numerical aperture capable of imaging from the visible to near-infrared *** combination of high resolution and wavelength coverage was achieved by combining a simple imaging lens with a fast and accurate correction of non-isoplanatic *** present experimental results for overlay targets that demonstrate the capability of our computational aberration correction in the visible and near-infrared wavelength *** wide-ranged-wavelength imaging system can advance semiconductor metrology.

关键词： Lens aberrations Non-isoplanatism Digital holographic microscopy Metrology Computational imaging

Electrochemically-stimulated nanoscale mechanochemical wear of silicon

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摩擦:英文版 2023年第11期11卷 2142-2152页

作者： Chen XIAO Stefan VAN VLIET Roland BLIEM Bart WEBER Steve FRANKLIN Advanced research Center for Nanolithography(ARCNL) Amsterdam 1098XGthe Netherlands Van der Waals–Zeeman Institute Institute of PhysicsUniversity of Amsterdam(UvA)Amsterdam 1098XGthe Netherlands Department of Materials Science and Engineering The University of SheffieldSheffield S13JDUK

Mechanochemical reactions at the sliding interface between a single-crystalline silicon(Si)wafer and a silica(SiO2)microsphere were studied in three environmental conditions:humid air,potassium chloride(KCl)solution,and KCl solution with an applied *** to that from humid air,mechanochemical material removal from the silicon surface increased substantially in the KCl-immersed condition,and further increased when electrochemistry was introduced into the tribological *** measuring the load dependence of the material removal rate and analyzing the results using a mechanically assisted Arrhenius-type kinetic model,the activation energy(E_(a))and the mechanical energy(E_(m)),by which this energy is reduced by mechanical activation,were compared qualitatively under different environmental *** the KCl-immersed condition,mechanochemistry may decrease the required effective energy of reactions(E_(eff)=E_(a)−E_(m))and promote material removal mainly through improved catalysis of the mechanochemical reactions facilitated by greater availability of water molecules compared to the humid air ***,the effectiveness of the mechanochemistry is *** the electrochemical condition,electrochemically-accelerated oxidation of the silicon surface was confirmed by the X-ray photoelectron spectroscopy(XPS)*** results strongly suggest that electrochemistry further stimulates mechanochemical reactions primarily by increasing the initial energy state of the surface via the facilitated formation of interfacial bonding bridges,i.e.,a surface oxidation/hydroxylation process.

关键词： spherical contact adhesive wear normal loading power law

research Article Focusing Properties of High-Order Harmonics

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Ultrafast Science 2021年第1期 31-38页

作者： Maria Hoflund Jasper Peschel Marius Plach Hugo Dacasa Kévin Veyrinas Eric Constant Peter Smorenburg Hampus Wikmark Sylvain Maclot Chen Guo Cord Arnold Anne L'Huillier Per Eng-Johnsson Department of Physics Lund UniversityP.O.Box 11822100 LundSweden Universitéde Bordeaux CNRSCEACentre Laser Intenses et Applications(CELIA)43 Rue P.Noailles33400 TalenceFrance Univ Lyon Univ Claude Bernard Lyon 1CNRSInstitut Lumière MatièreF-69622 VilleurbanneFrance asml research ASML Netherlands B.V.5504 DR VeldhovenNetherlands

Many applications of the extreme ultraviolet(XUV)radiation obtained by high-order harmonic generation(HHG)in gases require a small focus area in order to enable attosecond pulses to reach a high ***,high-order harmonics generated in Ar with a multiterawatt laser system in a loose focusing geometry are focused to a few micrometers using two toroidal mirrors in a Wolter configuration with a high demagnification *** a knife-edge measurement technique,we determine the position and size of the XUV foci as a function of harmonic *** show that the focus properties vary with harmonic order and the generation ***,based on a classical description of the harmonic dipole phase and assuming that the individual harmonics can be described as Gaussian beams,reproduce the experimental *** discuss how the generation geometry affects the intensity and duration of the focused attosecond pulses.

关键词： harmonic harmonics geometry

Meta-analysis of CO_(2) conversion,energy efficiency,and other performance data of plasma-catalysis reactors with the open access PIONEER database

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Journal of Energy Chemistry 2023年第11期86卷 318-342,I0007页

作者： Antoine Salden Maik Budde Carolina A.Garcia-Soto Omar Biondo Jairo Barauna Marzia Faedda Beatrice Musig ChloéFromentin Minh Nguyen-Quang Harry Philpott Golshid Hasrack Domenico Aceto Yuxiang Cai Federico Azzolina Jury Annemie Bogaerts Patrick Da Costa Richard Engeln María Elena Gálvez Timo Gans Tomas Garcia Vasco Guerra Carlos Henriques Monika Motak Maria Victoria Navarro Vasile I.Parvulescu Gerard Van Rooij Bogdan Samojeden Ana Sobota Paolo Tosi Xin Tu Olivier Guaitella Department of Physics University of Trento38100 PovoItaly Department of Applied Physics and Science Education Eindhoven University of Technology5600 MB EindhovenThe Netherlands Instituto de Plasmas e Fusão Nuclear Instituto Superior TécnicoUniversidade de Lisboa1049-001 LisboaPortugal LPP CNRSÉcole PolytechniqueSorbonne UniversitéUniversitéParis-SaclayIP-Paris 91128 PalaiseauFrance Department of Organic Chemistry Biochemistry and CatalysisUniversity of BucharestBucharestRomania research Group PLASMANT Department of ChemistryUniversity of AntwerpUniversiteitsplein 1Wilrijk B-2610Belgium DIFFER 5612AJ EindhovenThe Netherlands Instituto de Carboquímica ICB-CSIC Zaragoza 50018Spain Faculty of Energy and Fuels AGH University of KrakowKrakowPoland Institut Jean le Rond d’Alembert CNRS UMR 7190-Sorbonne UniversitéSaint-Cyr l’Ecole 78210France Laboratoire Catalyse et Spectrochimie(LCS) CNRS-ENSICAEN-Universitéde Caen6 boulevard du Maréchal-Juin14000 CaenFrance CQE Centro de Química EstruturalInstituto Superior TécnicoUniversidade de LisboaAv.Rovisco Pais1049-001 LisboaPortugal School of Physical Sciences and National Centre for Plasma Science and Technology Faculty of Science and HealthDublin City UniversityDublinIreland asml De Run 65015504 DR VeldhovenThe Netherlands Faculty of Science and Engineering Maastricht University6229 GS MaastrichtThe Netherlands CNR Istituto per la Scienza e Tecnologia dei Plasmi(ISTP)Italy Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK

This paper brings the comparison of performances of CO_(2)conversion by plasma and plasma-assisted catalysis based on the data collected from literature in this field,organised in an open access online *** tool is open to all users to carry out their own analyses,but also to contributors who wish to add their data to the database in order to improve the relevance of the comparisons made,and ultimately to improve the efficiency of CO_(2)conversion by *** creation of this database and database user interface is motivated by the fact that plasma-catalysis is a fast-growing field for all CO_(2)conversion processes,be it methanation,dry reforming of methane,methanolisation,or *** a result of this rapid increase,there is a need for a set of standard procedures to rigorously compare performances of different ***,this is currently not possible because the fundamental mechanisms of plasma-catalysis are still too poorly understood to define these standard *** however,the accumulated data within the CO_(2)plasma-catalysis community has become large enough to warrant so-called“big data”studies more familiar in the fields of medicine and the social *** enable comparisons between multiple data sets and make future research more effective,this work proposes the first database on CO_(2)conversion performances by plasma-catalysis open to the whole *** database has been initiated in the framework of a H_(2)0_(2)0 European project and is called the“PIONEER Data Base”.The database gathers a large amount of CO_(2)conversion performance data such as conversion rate,energy efficiency,and selectivity for numerous plasma sources coupled with or without a *** data set is associated with metadata describing the gas mixture,the plasma source,the nature of the catalyst,and the form of coupling with the *** the database itself,a data extraction tool with direct visualisation features or advance

关键词： Open-access database on plasma-catalysis experiment CO_(2) conversion Plasma-catalysis Carbon capture and utilisation(CCU) Energy efficiency Specific energy input Dielectric barrier discharge Packed bed reactor Methanation Dry reforming of methane