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design and Optimization of a Samara-Inspired Lightweight Monocopter for Extended Endurance

IEEE Robotics and Automation Letters 2025年第7期10卷 7214-7221页

作者： Xinyu Cai Shangkun Zhong Tee Meng Tan Wei Jun Ang Shaohui Foong Engineering Product Development Pillar Singapore University of Technology and Design (SUTD) Singapore Aviation Key Laboratory of Science and Technology on Flight Control AVIC Xi'an Automatic Flight Control Research Institute Xi'an China

Small multirotors demonstrate significant potential due to their simple airframe and human-friendly operation. However, the reduced size results in substantially higher energy consumption, which severely limits their flight endurance and restricts their range of applications. Ornithopters, while offering better aerodynamic efficiency, experience energy losses due to the mechanical complexity required to generate reciprocating motion. In this work, inspired by the samara, we present a lightweight aircraft with an exceptionally simple design featuring a single actuator and a mono airfoil. To optimize the flight configuration for minimal power consumption, we employed a Surrogate optimization method that integrates spinning airfoil dynamics, motor-propeller efficiency, and hovering equilibrium. As a result, the proposed vehicle achieves position-controlled hovering flight for up to 26 minutes with a takeoff weight of only 32 grams. Its superior power efficiency is demonstrated by a high power loading of 9.1 grams per watt. Compared to state-of-the-art systems, the proposed design shows significant improvements in both flight endurance and power efficiency. The reliable and stable position-holding flight over an extended period further validates the effectiveness of the proposed methods and the practical applicability of the fabricated prototype.

关键词： Actuators Aerodynamics Automotive components Robots Propellers Torque Spinning Power demand Atmospheric modeling Payloads

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Satellite Payload design for Optimized Thermal Management Using a Distributed Processor System

Satellite Payload Design for Optimized Thermal Management Us...

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Forum on Specification, Verification and design Languages, FDL

作者： Markus Plattner Chedi Fassi Florian Kreiner Jintin Frank Philipp Radecker Markus Zimmermann Engineering Minds Munich GmbH Munich Germany Laboratory for Product Development and Lightweight Design Technical University of Munich Munich Germany

Processor Layout Utilization for Thermal Optimization (PLUTO) is a research project that started in 2022 and is co-funded by the Bavarian Ministry of Economic Affairs, Regional development, and Energy. In a consortium of space industry and university, the PLUTO project investigates new methodologies for designing thermally sensitive satellite payloads accommodating distributed processor modules. A top-down design approach, based on so-called solution spaces, is applied to arrange modules within a given payload envelope and find a payload layout with low thermal gradients for various operational modes. A digital twin of the thermal behavior of the system shall then be derived from the design and implemented as a software routine in the processor modules. The temperature gradients within the payload shall be minimized by adjusting the distribution of power consumption within the payload. Therefore, the system control and processing tasks are locally distributed among the modules on the fly based on the prediction of the digital twin. A demonstrator payload with three interconnected processor modules is currently under development and is expected to be thermally tested in 2024.

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Topology optimization subject to anisotropic stiffness constraints for the lightweight design of vibrating structures 30

Topology optimization subject to anisotropic stiffness const...

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30th International Conference on Noise and Vibration Engineering, ISMA 2022 and 9th International Conference on Uncertainty in Structural Dynamics, USD 2022

作者： Frank, J. Ma, D. Zimmermann, M. Technical University of Munich TUM School of Engineering and Design Department Mechanical Engineering Laboratory for Product Development and Lightweight Design Boltzmannstrasse 15 Garching85748 Germany Max-Planck-Institute for extraterrestrial physics Giessenbachstr. 1 Garching85748 Germany

ISBN: (纸本)9789082893151

The design of optical satellite instruments often requires careful design of support structures. They transfer loads from the satellite platform to critical components and control the overall dynamic properties. Their structure needs to maintain some flexibility but, at the same time, also provide sufficient stiffness. Therefore, the allowable stiffness has to lie in a specific range. By applying a top-down approach for decomposition of system eigenfrequency requirements, stiffness constraints on boundaries can be defined for desired subsystems. With the decomposed constraints, components are optimized separately and, thus, more efficiently rather than the entire structure. For the support structure, mass is minimized using topology optimization. The classical optimization scheme of compliance minimization and volume constraint is turned into a mass minimization problem with appropriate directional compliance constraints. The approach is applied to the Wide Field Imager, an X-ray imaging instrument for the satellite telescope Athena. © 2022 Proceedings of ISMA 2022 - International Conference on Noise and Vibration Engineering and USD 2022 - International Conference on Uncertainty in Structural Dynamics. All rights reserved.

关键词： Stiffness

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Solving the swing-up and balance task for the Acrobot and Pendubot with SAC

arXiv

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arXiv 2023年

作者： Zhang, Chi Sathuluri, Akhil Zimmermann, Markus Technical University of Munich Laboratory for Product Development and Lightweight Design Munich Germany Robotics Innovation Center DFKI GmbH Bremen Germany

We present a solution of the swing-up and balance task for the pendubot and acrobot for the participation in the AI Olympics competition at IJCAI 2023. Our solution is based on the Soft Actor Crtic (SAC) reinforcement learning (RL) algorithm for training a policy for the swing-up and entering the region of attraction of a linear quadratic regulator (LQR) controller for stabilizing the double pendulum at the top position. Our controller achieves competitive scores in performance and robustness for both, pendubot and acrobot, problem scenarios. Copyright © 2023, The Authors. All rights reserved.

关键词： Reinforcement learning

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3D Printed Sodiophilic Reduced Graphene Oxide/Diamane Microlattice Aerogel for Enhanced Sodium Metal Battery Anodes

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Advanced Science 2025年第0期 e2417638页

作者： Liu, Mengmeng Kong, Dezhi Chu, Ningning Zhi, Gang Wang, Hui Xu, Tingting Wang, Xinchang Li, Xinjian Zhang, Zhuangfei Yang, Hui Ying Wang, Ye Key Laboratory of Material Physics Ministry of Education School of Physics Zhengzhou University Zhengzhou450052 China Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road Singapore487372 Singapore

Sodium metal anode holds great potential for high energy density sodium batteries. However, its practical utilization is impeded by significant volume change and uncontrolled dendrite growth. To tackle these issues, a three-dimensional (3D) hierarchical porous sodiophilic reduced graphene oxide/diamane (rGO/diamane) microlattice aerogel is constructed by a direct ink writing (DIW) 3D printing (3DP) method. The molten Na is diffused into the rGO/diamane host to form Na@rGO/diamane anode, which can deliver an ultra-high capacity of 78.60 mAh cm−2 (1090.94 mAh g−1). Benefiting from uniform ion distribution and homogeneously distributed sodiophilic diamane enabled dendrite-free deposition morphology, the Na@rGO/diamane anodes exhibit a long cycle-life of over 7200 h at 1 mA cm−2 with 1 mAh cm−2. Furthermore, the Na@rGO/diamane anode also enhances the long-term stability at an elevated operation temperature of 60 °C, sustaining a prolonged lifespan of 400 h at 1 mA cm−2 with 1 mAh cm−2. Notably, when integrated with the Na3V2(PO4)3@carbon (NVP@C) cathode and Na@rGO/diamane anode, the full cell delivers sustained longevity, maintaining a lifespan of over 2000 cycles with a capacity retention rate of 95.72%. This work sheds new insights into the application of diamane for the development of stable and high-performance sodium metal batteries. © 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH.

关键词： Aerogels

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Computing component requirements for multiple connected transfer paths of structural borne noise 30

Computing component requirements for multiple connected tran...

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30th International Conference on Noise and Vibration Engineering, ISMA 2022 and 9th International Conference on Uncertainty in Structural Dynamics, USD 2022

作者： Xu, D. Häußler, M. Zimmermann, M. Technical University of Munich TUM School of Engineering and Design Laboratory for Product Development and Lightweight Boltzmannstr. 15 Garching85748 Germany VIBES.technology Molengraaffsingel 14 Delft2629 JD Netherlands

ISBN: (纸本)9789082893151

Reducing noise propagation in mechanical structures can be difficult when several components on multiple intersecting transfer paths interact. One way to reduce design complexity caused by the transfer path interaction is to derive component requirements from the system design goal. The component requirements should ensure that the system design goal is reached whenever these requirements are met. In this paper, we present an approach that computes solution-neutral requirements on isolation elements of multiple connected transfer paths, such that each of them can be developed independently and efficiently. This is accomplished by first modeling the system dynamics with Dynamic Substructuring and Transfer Path Analysis. Secondly, the ranges of admissible stiffness of isolation elements are quantitatively expressed as a so-called solution space for each isolation element. The proposed approach is applied to the noise propagation path of an electric compressor in a passenger vehicle. © 2022 Proceedings of ISMA 2022 - International Conference on Noise and Vibration Engineering and USD 2022 - International Conference on Uncertainty in Structural Dynamics. All rights reserved.

关键词： Regression analysis

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Research on Healthy City Construction from the Perspective of City Brand: Focus on Case of Seoul 24th

Research on Healthy City Construction from the Perspective o...

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24th International Conference on Human-Computer Interaction, HCII 2022

作者： Yang, Xu Sun, Xin Wang, Le Tseng, Kevin C. School of Design Art and Media Nanjing University of Science and Technology Nanjing China Nanjing Bushu Culture Communication Co. Ltd. Nanjing China Department of Design National Taiwan Normal University Taipei Taiwan Product Design and Development Laboratory Taoyuan Taiwan Department of Industrial Design National Taipei University of Technology Taipei Taiwan

ISBN: (纸本)9783031181573

In the post-epidemic era, health has become people’s major concern. An increasing number of people have shown their interest in the planning and construction of healthy cities, which are related to the quality of life and the choice of the city to live in. The concept of a healthy city has received extensive attention since it was first proposed in the 1980s. To construct healthy cities is conducive to addressing health-related problems in the city, while also driving sustainable development for the city in the long run. With the continuous practice and development of healthy cities in recent years, healthy cities have been more closely linked to all aspects of urban development on the premise that the aim of healthy city construction is to improve the health of the residents and promote sustainable development. Based on the literature and case studies of Seoul, this study discusses the beneficial experience of building a healthy city from the perspective of brand construction, and puts forward the connotation of multi-disciplinary cooperative healthy city brand construction. © 2022, Springer Nature Switzerland AG.

关键词： Sustainable development

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Compatibility Assessment for Interfaces in Drivetrains of Robot-Like Systems

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Procedia Computer Science 2024年 232卷 2994-3002页

作者： Marcus Volpert Birgit Vogel-Heuser Dominik Hujo Karsten Stahl Markus Zimmermann Institute of Automation and Information Systems TUM School of Engineering and Design Technical University of Munich Garching Germany Fellow IEEE Core Member of MDSI Member of MIRMI Institute of Machine Elements TUM School of Engineering and Design Technical University of Munich Garching Germany Laboratory for Product Development and Lightweight Design TUM School of Engineering and Design Technical University of Munich Garching Germany

Due to the complexity of robot-like systems (RLS), new developments are often avoided, and most variants of the systems are designed. The primary determinant of an RLS is its drivetrain, which comprises purchased components, namely the controller, motor driver, motor, and gearbox. Each of these purchased parts has different interfaces that are not standardized. If the interfaces are sufficiently complex, the compatibility of the parts can no longer be guaranteed manually. Therefore, this paper presents a draft ontology that verifies the compatibility of purchased parts in RLS drivetrains. Classes and properties are obtained from expert knowledge, norms, data standards, and data sheets to build an ontology. The ontology design is evaluated using an application example for a motor-gearbox interface.

关键词： robot-like systems interface modeling ontology model-based systems engineering drivetrains

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Self-healable gels in electrochemical energy storage devices

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Nano Research 2024年第4期17卷 3302-3323页

作者： Yang Li PeiPei Ding Yuzhe Gu Sheng Qian Yuncong Pang Lele Wang Jiayang Feng Baoguang Liu Qi Wan Ping Li Zhiwei Liu College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023China College of Materials Science&Engineering Beijing University of TechnologyBeijing 100124China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Pillar of Engineering Product Development Singapore University of Technology and DesignSingapore 487372Singapore School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China

In the green energy and carbon-neutral technology,electrochemical energy storage devices have received continuously increasing attention ***,due to the unavoidable volume expansion/shrinkage of key materials or irreversible mechanical damages during application,the stability of energy storage and delivery as well as the lifetime of these devices are severely shortened,leading to serious performance degradation or even safety ***,the utilization of self-healable gels into electrochemical energy storage devices,such as electrodes,binders,and electrolytes,is proven as an effective method to realize long-term stable operation of these devices via the self-repairing of mechanical and electrochemical ***,this review first summarizes the feature and fabrication of different gels,paying special attention to hydrogels,organohydrogels,and ***,basic concepts and figure of merit of self-healable gels are analyzed with a detailed discussion at the healing mechanisms,from reversible dynamic bonds to physical molecular diffusion,and to external healing *** we introduce all the important parts of electrochemical energy storage devices,which could be replaced by healable gels to enhance the durability,including electrodes,binders,and ***,the critical challenges and future perspectives regarding the future development of healable gels based high-performance electrochemical energy storage devices or electronics are provided.

关键词： self-healable gels healing mechanisms electrodes binders gel electrolytes

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Bismuth Oxide Selenium/Graphene Oxide Composites:Toward High-Performance Electrodes for Aqueous Alkaline Battery

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Energy & Environmental Materials 2021年第3期4卷 465-473页

作者： Yi-Lin Liu Meng-Qiu Li Gui-Gen Wang Le-Yang Dang Fei Li Mei Er Pam Hua-Yu Zhang Jie-Cai Han Hui Ying Yang Shenzhen Key Laboratory for Advanced Materials Harbin Institute of TechnologyShenzhenShenzhen 518055China Pillar of Engineering Product Development Singapore University of Technology and Design8 Somapah RoadSingapore City 487372Singapore National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China

Aqueous alkaline battery represents a promising energy storage technology with both high energy density and high power density as rechargeable ***,the low theoretical capacities,kinetics and stability of anode materials have limited their developments and *** this study,we propose a novel method to produce two-dimensional layered bismuth oxide selenium(Bi_(2)O_(2)Se)and reduced graphene oxide(r GO)composites via a one-step hydrothermal *** volume change caused by phase change during rapid charging and discharging is significantly reduced and the capacity reaches 263.83 m Ah g^(-1)at a current density of 0.5 A g^(-1).The Bi_(2)O_(2)Se/r GO electrode exhibits excellent cycling stability in which the capacity retention rate is 81.04%after 5000 *** importantly,the Bi_(2)O_(2)Se/r GO nanosheet composite is used as the anode electrode material with MnCo_(2)O_(4.5)@Ni(OH)_(2)as the cathode electrode material in aqueous alkaline *** the energy density is 76.16 W h kg^(-1),the power density reaches 308.65 W kg^(-1).At a power density of 10.21 k W kg^(-1),the energy density remains as high as 33.86 W h kg^(-1).The results presented here may advance the understanding of the issues facing the development of aqueous battery anode materials.

关键词： anode materials aqueous alkaline battery Bi_(2)O_(2)Se nanosheet reduced graphene oxide

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