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IEEE Conference on Decision and control

作者： Zhichao Pan Biao Huang Fei Liu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi China department of chemical and materials engineering University of Alberta Edmonton Alberta Canada

This paper proposes a novel Koopman operator-based finite impulse response (KFIR) filter for nonlinear dynamic systems. This filter is generalized from the minimum variance unbiased (MVU) FIR filter for linear systems by using a global linear approximation of the nonlinear dynamics obtained from Koopman operator theory and the extended dynamic mode decomposition (EDMD) algorithm. Based on the recursive linear model, a reduced-order FIR filtering structure is proposed, and the optimal gain is derived to minimize the trace of the estimation error covariance. Unlike traditional methods, the KFIR filter requires no prior knowledge of the initial state and fully utilizes the data of a moving horizon. Simulation results show that the proposed filter has excellent robustness against unexpected modeling uncertainties and inaccurate noise information, making it suitable for real applications.

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Evaluation of Magnet Configurations for Magnetohydrodynamic Trajectory control during Planetary Entry

Evaluation of Magnet Configurations for Magnetohydrodynamic ...

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AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Fawley, Destiny M. Eggl, Siegfried Putnam, Zachary R. D’souza, Sarah Borner, Arnaud University of Illinois at Urbana-Champaign Department of Aerospace Engineering 104 S. Wright St. UrbanaIL61801 United States Johns Hopkins Applied Physics Laboratory Astrodynamics and Control Group LaurelMD20723 United States NASA Ames Research Center Entry Systems and Vehicle Development Branch Moffett FieldCA94035 United States AMA Inc. NASA Ames Research Center Thermal Protection Materials and Systems Branch MS 234-1 Moffett FieldCA94035 United States

ISBN: (纸本)9781624107238

Magnetohydrodynamics is a phenomenon that can be harnessed during planetary entry to augment aerodynamic drag and may enable higher mass payloads to safely reach the surface. The magnetohydrodynamic force is quantified over a wide range of freestream conditions using computational fluid dynamics results from a previous study. The force is calculated for an array of small electromagnets, a large non-superconducting magnet, a large superconducting magnet, and a uniform field. The superconducting magnet produces a magnetohydrodynamic force within an order of magnitude of aerodynamic drag for velocities higher than 10 km/s, indicating that it may have a reasonable impact on the trajectory for some cases. The array of small magnets and non-superconducting magnet produced a magnetohydrodynamic force that is less than 1% of the aerodynamic drag, so their magnetic fields are not strong enough to affect an entry trajectory. Additionally, the magnet placement plays an important role in magnetohydrodynamic force magnitude, with a magnet located near the shoulder producing approximately eight times more force than a magnet placed on the axis of symmetry. A mass and power budget for each magnet configuration is given assuming current state-of-the-art magnet technology. This study also discusses implementation challenges for each type of magnet on a spacecraft. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Aerodynamic drag

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基于自解耦三明治结构的横向运动栅场效应晶体管MEMS微力传感器

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engineering 2023年第2期21卷 61-74,M0004页

作者：高文迪乔智霞韩香广王小章 Adnan Shakoor 刘存朗卢德江杨萍赵立波王永录王久洪蒋庄德孙东 State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesOverseas Expertise Introduction Center for Micro/Nano Manufacturing and Nano Measurement Technologies Discipline InnovationXi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and SystemSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Robotics and Systems Harbin Institute of TechnologyHarbin 150006China Eleventh Research Institute Sixth Academy of China Aerospace Science and Technology Co.Xi’an 710100China Department of Control and Instrumentation Engineering King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Biomedical Engineering City University of Hong KongHong Kong 999077China

本文介绍了一种基于横向可移动栅极场效应晶体管(LMGFET)的新型微型力传感器的开发。提出了一种精确的电气模型,用于小型LMGFET器件的性能评估,与以前的模型相比,其精度有所提高。采用了一种新型三明治结构,该结构由一个金交叉解耦栅阵... 详细信息

本文介绍了一种基于横向可移动栅极场效应晶体管(LMGFET)的新型微型力传感器的开发。提出了一种精确的电气模型,用于小型LMGFET器件的性能评估,与以前的模型相比,其精度有所提高。采用了一种新型三明治结构,该结构由一个金交叉解耦栅阵列层和两个软光阻层SU-8组成。通过所提出的双差分传感结构,LMGFET横向工作在垂直干扰下的输出电流被大大消除,所提出传感器的相对输出误差从4.53%(传统差分结构)降低到0.01%。提出了一种实用的传感器制造工艺,并对其进行了模拟。基于LMGFET的力传感器的灵敏度为4.65μA·nN^(-1),可与垂直可移动栅极场效应晶体管(VMGFET)器件相媲美,但非线性度提高了0.78%,测量范围扩大了±5.10μN。这些分析为LMGFET器件的电气和结构参数提供了全面的设计优化,并证明了所提出的传感器在生物医学显微操作应用中具有良好的力传感潜力。

关键词：力传感器场效应晶体管横向运动三明治结构电气模型显微操作非线性度双差分

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Small, Modular Radioisotope Thermoelectric Power System for Flexible Spacecraft Architectures

Small, Modular Radioisotope Thermoelectric Power System for ...

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AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Nemanick, E. Joseph Helvajian, Henry Delgado, Adon Hinkley, David Schmeidler, Martin Chaney, Donald Bux, Sabah Le, Billy Chun-Yip Energy Technology Department The Aerospace Corporation FFRDC El SegundoCA90245 United States Space Materials Laboratory The Aerospace Corporation FFRDC El SegundoCA90245 United States Thermal Control Department The Aerospace Corporation FFRDC El SegundoCA90245 United States Mission Systems Engineering Department The Aerospace Corporation FFRDC El SegundoCA90245 United States Thermal Design and Analysis Department The Aerospace Corporation FFRDC El SegundoCA90245 United States Nuclear Hardness and Survivability Department The Aerospace Corporation FFRDC El SegundoCA90245 United States Power and Sensors Department The Jet Propulsion Laboratory PasadenaCA91011 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The Atomic Planar Power for Lightweight Exploration (APPLE) is a small scale, modular, isotope-agnostic spacecraft power architecture that leverages the extensive heritage of radioisotope power generation with new high efficiency skutterudite (SKD) thermoelectrics in a robust modular system which can enable a wide range of spacecraft and rover designs. The system is isotope agnostic and uses a small core of radioisotope, either238Pu or241Am oxide mounted on skutterudite thermoelectric legs, insulated in an aerogel insulation and mounted on the vehicle chassis for thermal dissipation. The APPLE architecture opens the design space for spacecraft and mission designs through distributed multiple power units that scales across vehicle sizes, from 10’s of Watts to kilowatt systems, and its integral placement in/on the vehicle allows for efficient heat utilization. Thermal simulations showed that locating the unit on the vehicle surface maintains a temperature range between 0˚C and 30˚C for the vehicle while the hot shoe thermoelectric junction remains at 500˚C, allowing the vehicle chassis to dissipate waste heat without a dedicated radiator. This enables complete utilization of the thermal inventory for power as well as vehicle heating without extensive thermal distribution systems. Utilization of the chassis as the radiator allows for a large radiative surface without adding radiator mass while increasing the efficacy of heat-to-electricity conversion (10-11%). This design uses skutterudite (SKD) thermoelectrics operating at greater than 10% efficiency and meet the 17+ year wear out mission requirements. This work fabricated four leg, 2 junction SKD thermoelectric units and mated them with an isotope simulator for power generation and demonstrated voltage and current generation. Mission designs are presented utilizing APPLE as the power source enabling small lunar experiments that can survive the lunar night, as well as power a Mars helicopter baseline. © 2025, American

关键词： Chassis

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Nanocarbon-Enhanced 2D Photoelectrodes:A New Paradigm in Photoelectrochemical Water Splitting

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Nano-Micro Letters 2021年第2期13卷 45-73页

作者： Jun Ke Fan He Hui Wu Siliu Lyu Jie Liu Bin Yang Zhongjian Li Qinghua Zhang Jian Chen Lecheng Lei Yang Hou Kostya Ostrikov Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310012People’s Republic of China School of Chemistry and Environmental Engineering Wuhan Institute of Technology206 Guanggu 1st RoadWuhan 430205People’s Republic of China Department of Environmental Science and Engineering North China Electric Power University619 Yonghua N StBaoding 071003People’s Republic of China Institute of Zhejiang University-Quzhou Quzhou 324000People’s Republic of China Ningbo Research Institute Zhejiang UniversityHangzhou 315100People’s Republic of China State Key Laboratory of Industrial Control Technology College of Control Science and EngineeringZhejiang UniversityHangzhou 310012People’s Republic of China School of Chemistry and Physics and Centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4000Australia

Solar-driven photoelectrochemical(PEC)water splitting systems are highly promising for converting solar energy into clean and sustainable chemical *** such PEC systems,an integrated photoelectrode incorporates a light harvester for absorbing solar energy,an interlayer for transporting photogenerated charge carriers,and a co-catalyst for triggering redox ***,understanding the correlations between the intrinsic structural properties and functions of the photoelectrodes is *** we critically examine various 2D layered photoanodes/photocathodes,including graphitic carbon nitrides,transition metal dichalcogenides,layered double hydroxides,layered bismuth oxyhalide nanosheets,and MXenes,combined with advanced nanocarbons(carbon dots,carbon nanotubes,graphene,and graphdiyne)as co-catalysts to assemble integrated photoelectrodes for oxygen evolution/hydrogen evolution *** fundamental principles of PEC water splitting and physicochemical properties of photoelectrodes and the associated catalytic reactions are *** strategies for the assembly of 2D photoelectrodes with nanocarbons to enhance the PEC performances are *** mechanisms of interplay of 2D photoelectrodes and nanocarbon co-catalysts are further *** challenges and opportunities in the field are identified to guide future research for maximizing the conversion efficiency of PEC water splitting.

关键词： Advanced nanocarbons Co-catalysts 2D layered structure Integrated photoelectrodes Photoelectrochemical water splitting

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High Sensitivity Submicron Scale Temperature Sensor Based on Perovskite Nanoplatelet Lasers

SSRN

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SSRN 2024年

作者： Zhao, Ruofan Tao, Jianxun Xi, Yuying Chen, Jiangzhao Ji, Ting Wang, Wenyan Wen, Rong Cui, Yanxia Chen, Junsheng Lia, Guohui College of Physics and Optoelectronics Key Laboratory of Interface Science and Engineering in Advanced Materials Key lab of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology Taiyuan030024 China School of Materials Science and Engineering Kunming University of Science and Technology Kunming650093 China Shanxi-Zheda institute of advanced materials and chemical engineering China Nano-Science Center Department of Chemistry University of Copenhagen Universitetsparken 5 CopenhagenDK-2100 Denmark

Submicron scale temperature sensors are crucial for a range of applications, particularly in micro and nanoscale environments. One promising solution involves the use of active whispering gallery mode (WGM) microresonators. These resonators can be remotely excited and read out using free-space structures, simplifying the process of sensing. In this study, we present a submicron-scale temperature sensor with a remarkable sensitivity up to 190 pm/℃ based on a triangular CH3NH3PbI3 nanoplatelet (NPL) laser. Notably, as temperature changes, the peak wavelength of the laser line shifts linearly. This unique characteristic allows for precise temperature sensing by tracking the peak wavelength of the NPL laser. The optical modes are confined within the perovskite NPL, which measures just 85 nanometers in height, due to total internal reflection. Our NPL laser boasts several key features, including a high Q-factor of ~ 2610 and a low laser threshold of about 19.8 µJ cm−2. The combination of exceptional sensitivity and ultra-small size makes our WGM device an ideal candidate for integration into systems that demand compact temperature sensors. This advancement paves the way for significant progress in the development of ultrasmall temperature sensors, opening new possibilities across various fields. © 2024, The Authors. All rights reserved.

关键词： Perovskite

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Aluminum Nitride Ring Resonator-Coupled Spin Defects in Hexagonal Boron Nitride for Integrated Quantum Photonics

Aluminum Nitride Ring Resonator-Coupled Spin Defects in Hexa...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Henry C. Roberts Aadil Waseem Scott A. Wicker Hamza Abudayyeh Dong Seob Kim Zhida Liu Steven Randolph Xiaoqin Li Xiuling Li Department of Electrical and Computer Engineering Microelectronics Research Center The University of Texas at Austin Austin TX USA Department of Physics and Center for Complex Quantum Systems Center for Dynamics and Control of Materials and Texas Materials Institute The University of Texas at Austin Austin TX USA Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN USA

We report a new approach to generate waveguide-coupled emission from deterministically implanted boron vacancy spin defects in hBN using single-crystal AlN-on-sapphire ring resonators. This facilitates the eventual de... 详细信息

ISBN: (纸本)9798350369311

关键词： Boron Waveguide lasers Ring lasers Optical ring resonators Electro-optical waveguides Photonics Aluminum nitride

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Fire Test of an Equipment for Hydrogen Powered Aircraft

Fire Test of an Equipment for Hydrogen Powered Aircraft

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IEEE Metrology for Aerospace

作者： Tomasz Rogalski Jacek Pieniazek Piotr Cieciński Mirosław Szukiewicz Marcin Drajewicz Elżbieta Chmiel-Szukiewicz Robert Smusz Department of Avionics and Control Systems Rzeszow University of Technology Rzeszow Poland Department of Chemical and Process Engineering Rzeszow University of Technology Rzeszow Poland Department of Materials Science Rzeszow University of Technology Rzeszow Poland Department of Organic Chemistry Rzeszow University of Technology Rzeszow Poland Department of Thermadynamics Rzeszow University of Technology Rzeszow Poland

ISBN: (数字)9798350385045

ISBN: (纸本)9798350385052

Hydrogen fuel for aviation is a new idea. Its successful implementation requires new research and new technologies. One of them is the verification of the operation of the devices and their survivability in a hydrogen flame. The main topic of the article is the development of the hydrogen research and testing laboratory. Testing the flammability of hydrogen-containing systems is a challenge due to the very high explosiveness. The need to ensure the safety of both personnel and buildings means that the preparation of a stand for testing the flammability of aircraft systems should be treated differently from before. The article presents the design of a stand for fire resistance tests. Tests of fire resistance of various elements of aircraft systems, which in the event of an accident may be within the range of the hydrogen flame and elements of the hydrogen installation itself, are the main applications of the presented laboratory stand.

关键词： Temperature measurement Resistance Hydrogen Fires Flammability Safety Fuels

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Automated Assembly by Two-Fingered Microhand for Fabrication of Soft Magnetic Microrobots

Automated Assembly by Two-Fingered Microhand for Fabrication...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Yue Zhao Xiaoming Liu Ruixi Wang Dan Liu Masaru Kojima Qiang Huang Tatsuo Arai Key Laboratory of Biomimetic Robots and Systems Ministry of Education State Key Laboratory of Intelligent Control and Decision of Complex System Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing China School of Mechatronical Engineering Beijing Institute of Technology Beijing China Department of Intelligent Manufacturing Shenzhen International Graduate School Tsinghua University Shenzhen China Department of Materials Engineering Science Osaka University Osaka Japan Center for Neuroscience and Biomedical Engineering The University of Electro-Communications Tokyo Japan

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

Micro-assembly is an emerging method to fabricate microrobots with multiple modules or particles. However, there is always a lack of a flexible and efficient method to freely create the desired magnetic soft microrobots. In this paper, an automated assembly system based on a two-fingered microhand is presented for fabricating magnetic soft microrobots. Our proposed system can automatically pick and place components to assemble microrobots with a two-fingered micromanipulator, and orient these components through an external magnetic field. The automated assembly has the advantages of high accuracy, high speed, and high success rate. It can endow magnetic microrobots with flexible material selection, arbitrary geometry design, and programable magnetization profile. We can make full use of this system to fabricate multiple magnetic soft microrobots. The experiment results demonstrate that this system can efficiently fabricate microrobots with excellent mechanical properties, which have application potential in robotics, biomedical engineering, and environmental governance.

关键词： Three-dimensional displays Shape Micromanipulators Magnetization Manuals Three-dimensional printing Soft magnetic materials

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Nickel Phase Invades Ysz Electrolyte Through Ysz/Ysz Grain Boundary During Long-Term Operation of Sofc

SSRN

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SSRN 2023年

作者： Liu, Jiawei Wang, Yige Lyu, Zewei Wang, Chenpeng Ma, Yue Ye, Hao Liu, Yinglong Liu, Yingli Xu, Xiaoru Chen, Zhicong Han, Minfang Liang, Bo School of Materials and Energy Guangdong University of Technology Guangzhou510006 China State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Energy and Power Engineering Tsinghua University Beijing100084 China

A solid oxide fuel cell after long-term operation more than 5000 hours, nickel (Ni) phase is observed at YSZ/YSZ grain boundaries (GBs) within electrolyte. By using a humidified hydrogen, the single cell is electrochemically operated at 720℃ under 0.10 A·cm-2. The thickness of anode/electrolyte interface is thinned to less than 100 nm by a dual beam focused ion beam-scanning electron microscope (FIB-SEM). As-thinned electrolyte is analyzed by using High-Resolution Transmission Electron Microscopy (HR-TEM). The discrete nanostructures ranging from 50nm to 5nm are observed to have developed exclusively along the YSZ/YSZ grain boundaries. It is noted that the nickel phase is found in YSZ GBs of the electrolyte. FFT patterns shows that the invasion phase of nickel is FCC-Ni. A suggested mechanism has been put forth to explain the invasion of Ni phases into the electrolyte through YSZ/YSZ grain boundary. This mechanism takes into consideration the evolution of nanostructures, as well as the diffusion and nucleation of Ni, which involves the formation of Ni-OH species. © 2023, The Authors. All rights reserved.

关键词： Nanostructures

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