检索结果-内蒙古大学图书馆

IEEE Conference on Aerospace

作者： Stefan Barthelmes Fabian Buse Maxime Chalon Bastian Deutschmann Franz Hacker Roman Holderried Alexander Kolb Viktor Langofer André Fonseca Prince Hans-Jürgen Sedlmayr Juliane Skibbe Bernhard Vodermayer German Aerospace Center (DLR) Institute of System Dynamics and Control German Aerospace Center (DLR) Institute of Robotics and Mechatronics

IDEFIX is a four-wheeled 25kg rover that is jointly developed and built by the French Centre National d’Études Spatiales (CNES) and the German Aerospace Center (dlr). It will be brought to the Martian Moon Phobos by the Japan Aerospace Exploration Agency (JAXA) as part of the Martian Moons eXploration (MMX) mission in 2027. IDEFIX’s objectives are to scout the surface, demonstrate driving in milligravity and perform scientific measurements. To upright after landing on the surface, drive and align the rover to the sun, each wheel is mounted on a leg, which can be rotated full 360° in its respective shoulder joint. In previous publications, the development, flight design and qualification of the locomotion subsystem were *** the cruise phase there will be several health checks and – once landed on Phobos – the locomotion will be checked-out. To be able to analyze the health state quantitatively and parameterize the system properly, a good characterization of the system is important. The foundation of this characterization are tests and health-checks on the flight model (FM), as well as performance test results on the qualification model (QM). A selection of the post-processing and analysis of this measured data, that was done for the characterization of the Loco FM, is presented in this paper.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The dlr Moon-Mars Test Site for Robotic Planetary Exploration

The DLR Moon-Mars Test Site for Robotic Planetary Exploratio...

引用

Space robotics (iSpaRo), International Conference on

作者： Martin Görner Jennifer Cebulsky Andreas Dömel Maximilian Durner Riccardo Giubilato Moritz Kuhne Marcus G. Müller Kristin Lakatos Peter Lehner Roy Lichtenheldt Bernhard Rebele Mattias Roser Ryo Sakagami Yunis Scheeler Martin J. Schuster Manuel Schütt Wolfgang Stürzl Mallikarjuna Vayugundla Armin Wedler Institute of Robotics and Mechatronics German Aerospace Center (DLR) BL9 Landscape Architects Munich Germany Institute of System Dynamics and Control German Aerospace Center (DLR)

ISBN: (数字)9798350367232

ISBN: (纸本)9798350367249

Building robots for planetary exploration missions requires intensive testing throughout all phases of the design process. Especially, during hard- and software development as well as mission training the process benefits of easy-to-access test sites that offer realistic conditions. For this purpose we have built the 1500 m 2 dlr Moon-Mars test site in Oberpfaffenhofen, Germany. The facility provides a large variety of geological formations and ground substrates on a compact terrain as well as a rich set of power and network connections. As a unique feature of the outdoor test site, we prepared a dedicated link to the German Space Operations Center that enables telerobotic experiments from ISS. Furthermore, we provide an optical tracking system for ground truth measurement and control. We describe the design and construction process of the test site and present an overview of its features. Three experiments with our robots LRU1, LRU2 and the Scout rover regarding autonomous navigation and mapping, autonomous manipulation and sampling as well as advanced mobility tests demonstrate the usage of the test site.

关键词： Training Industries Service robots Space missions Optical variables measurement Optical fiber communication Robots Substrates Telerobotics Software development management

来源：评论

学校读者我要写书评

暂无评论

Qualification of the MMX Rover Locomotion Subsystem for the Martian Moon Phobos

Qualification of the MMX Rover Locomotion Subsystem for the ...

引用

IEEE Conference on Aerospace

作者： Stefan Barthelmes Ralph Bayer Wieland Bertleff Markus Bihler Fabian Buse Maxime Chalon Günther Geyer Franz Hacker Cynthia Hofmann Roman Holderried Alexander Kolb Erich Krämer Viktor Langofer Roy Lichtenheldt Sascha Moser André Fonseca Prince Kaname Sasaki Hans-Jürgen Sedlmayr Juliane Skibbe Bernhard Vodermayer German Aerospace Center (DLR) Institute of System Dynamics and Control Weßling German Aerospace Center (DLR) Institute of Robotics and Mechatronics Weßling German Aerospace Center (DLR) Institute of Space Systems Bremen

Planetary rovers have proven their function and value for the Earth moon as well as Mars in the past decades. While these celestial bodies have a gravity of the same order of magnitude as the Earth, wheeled locomotion has never been performed on a body with much lower gravity. Within the Japanese Martian Moon eXploration (MMX) mission, a wheeled rover will land on the Martian Moon Phobos with a gravity of about 1/2000 of the Earth gravity. The Robotic and Mechatronics Center of the German Aerospace Center (dlr-RMC) has designed and built the locomotion subsystem (LSS) for this rover. As the first ever driving gear for milli-gravity, the LSS needed to undergo a comprehensive qualification campaign. Due to the very challenging timeline of this project, the extent of the campaign needed to be carefully tailored to the needs of the mission. This work describes the concept of the verification including some crucial tailoring choices that have been made. The individual domains of verification are then described in detail with their scope, setup, procedure and results. The goal of this publication is to give a good overview and a detailed insight into the verification of the LSS for milli-gravity. Besides follow-up missions to Phobos, this work is also a good foundation for the qualification of future driving gears for low gravity environments or small rovers in general.

关键词： Earth Space vehicles Mars Mechatronics Gears Moon Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Multi-Agent Reinforcement Learning for Cooperative Vehicle Motion Control

Multi-Agent Reinforcement Learning for Cooperative Vehicle M...

引用

International Conference on Intelligent Transportation

作者： Kenan Ahmic Johannes Ultsch Jonathan Brembeck Darius Burschka Institute of System Dynamics and Control at the German Aerospace Center (DLR) Wessling Germany Chair of Robotics Artificial Intelligence and Embedded Systems Technical University of Munich (TUM) Munich Germany

ISBN: (数字)9798331505929

ISBN: (纸本)9798331505936

The longitudinal and lateral low-level motion control of multiple vehicles within a platoon is a challenging task, since several different control objectives need to be solved: (i) Each vehicle in the platoon needs to follow the reference path, (ii) the leading vehicle needs to drive with a desired reference velocity, and (iii) the following vehicles need to maintain a safe spacing distance to their respective preceding vehicle. Typically, several distinct controllers are developed for each task individually, which increases both the engineering effort as well as the susceptibility to errors. We address this issue and present a cooperative low-level vehicle motion controller based on Multi-Agent Reinforcement Learning (MARL) that is able to solve all of the above-mentioned control objectives for both the leading vehicle and the following vehicles. Therefore, we apply parameter sharing within MARL to update a single control policy in a centralized fashion using the experiences of all vehicles in the environment. Additionally, we utilize the concept of agent indication during the training process and enable the policy to specialize on the control objectives of the vehicle it is currently controlling. This leads to a unifying control approach and makes the development of further controllers redundant. The simulative assessment demonstrates the effectiveness of learned policy and shows that it is able to successfully solve all of the above-mentioned control objectives for both vehicles roles, even on unseen paths.

关键词： Training Process control Reinforcement learning Drives Vectors Robustness Collision avoidance Intelligent transportation systems

来源：评论

学校读者我要写书评

暂无评论

MMX Rover Locomotion Subsystem - Development and Testing towards the Flight Model

MMX Rover Locomotion Subsystem - Development and Testing tow...

引用

IEEE Conference on Aerospace

作者： Stefan Barthelmes Thomas Bahls Ralph Bayer Wieland Bertleff Markus Bihler Fabian Buse Maxime Chalon Franz Hacker Roman Holderried Viktor Langofer Roy Lichtenheldt Sascha Moser Kaname Sasaki Hans-Jü rgen Sedlmayr Juliane Skibbe Leon Stubbig Bernhard Vodermayer German Aerospace Center (DLR) Institute of System Dynamics and Control WeBling German Aerospace Center (DLR) Institute of Robotics and Mechatronics WeBling German Aerospace Center (DLR) Institute of Space Systems Bremen

ISBN: (数字)9781665437608

ISBN: (纸本)9781665437615

Wheeled rovers have been successfully used as mobile landers on Mars and Moon and more such missions are in the planning. For the Martian Moon eXploration (MMX) mission of the Japan Aerospace Exploration Agency (JAXA), such a wheeled rover will be used on the Marsian Moon Phobos. This is the first rover that will be used under such low gravity, called milli-g, which imposes many challenges to the design of the locomotion subsystem (LSS). The LSS is used for unfolding, standing up, driving, aligning and lowering the rover on Phobos. It is a entirely new developed highly-integrated mechatronic system that is specifically designed for Phobos. Since the Phase A concept of the LSS, which was presented two years ago [1], a lot of testing, optimization and design improvements have been done. Following the tight mission schedule, the LSS qualification and flight models (QM and FM) assembly has started in Summer 2021. In this work, the final FM design is presented together with selected test and optimization results that led to the final state. More specifically, advances in the mechanics, electronics, thermal, sensor, firmware and software design are presented. The LSS QM and FM will undergo a comprehensive qualification and acceptance testing campaign, respectively, in the first half of 2022 before the FM will be integrated into the rover.

关键词： Space vehicles Mars Frequency modulation Mechatronics Moon Writing Thermal sensors

来源：评论

学校读者我要写书评

暂无评论

Solar Sails for Planetary Defense High-Energy Missions

Solar Sails for Planetary Defense High-Energy Missions

引用

2019 IEEE Aerospace Conference, AERO 2019

作者： Grundmann, Jan Thimo Bauer, Waldemar Borchers, Kai Dumont, Etienne Grimm, Christian D. Ho, Tra-Mi Jahnke, Rico Koch, Aaron D. Lange, Caroline Maiwald, Volker Mess, Jan-Gerd Mikulz, Eugen Quantius, Dominik Reershemius, Siebo Renger, Thomas Sasaki, Kaname Seefeldt, Patric Spietz, Peter Sprowitz, Tom Sznajder, MacIej Tóth, Norbert Ceriotti, Matteo McInnes, Colin Peloni, Alessandro Dachwald, Bernd Lichtenheldt, Roy Wolff, Friederike Boden, Ralf Riemann, Johannes Seboldt, Wolfgang Wejmo, Elisabet Ziach, Christian Cordero, Federico Biele, Jens Krause, Christian Herčik, David Koncz, Alexander Pelivan, Ivanka Schmitz, Nicole Mikschl, Tobias Montenegro, Sergio Ruffer, Michael Tardivel, Simon DLR German Aerospace Center Institute of Space Systems Robert-Hooke-Strasse 7 Bremen28359 Germany University of Glasgow GlasgowG12 8QQ United Kingdom Faculty of Aerospace Engineering FH Aachen Univ. of Applied Sciences Hohenstaufenallee 6 Aachen52064 Germany DLR German Aerospace Center Robotics and Mechatronics Center Institute of System Dynamics and Control Münchener Str. 20 Oberpfaffenhofen Weßling82234 Germany DLR Institute of Space Systems Germany Telespazio-VEGA Darmstadt Germany DLR German Aerospace Center Space Operations and Astronaut Training - MUSC Cologne51147 Germany Institute for Geophysics and Extraterrestrial Physics Technical University Braunschweig Braunschweig Germany DLR German Aerospace Center Institute of Planetary Research Rutherfordstr. 2 Berlin12489 Germany Informatik 8 Universität Würzburg Am Hubland Würzburg97074 Germany CNES Future Missions Flight Dynamics 18 avenue E. Belin Toulouse Cedex 931401 France

ISBN: (纸本)9781538668542

20 years after the successful ground deployment test of a (20 m)2 solar sail at dlr Cologne, and in the light of the upcoming U.S. NEAscout mission, we provide an overview of the progress made since in our mission and hardware design studies as well as the hardware built in the course of our solar sail technology development. We outline the most likely and most efficient routes to develop solar sails for useful missions in science and applications, based on our developed 'now-term' and near-term hardware as well as the many practical and managerial lessons learned from the dlr-ESTEC Gossamer Roadmap. Mission types directly applicable to planetary defense include single and Multiple NEA Rendezvous ((M)NR) for precursor, monitoring and follow-up scenarios as well as sail-propelled head-on retrograde kinetic impactors (RKI) for mitigation. Other mission types such as the Displaced L1 (DL1) space weather advance warning and monitoring or Solar Polar Orbiter (SPO) types demonstrate the capability of near-term solar sails to achieve asteroid rendezvous in any kind of orbit, from Earth-coorbital to extremely inclined and even retrograde orbits. Some of these mission types such as SPO, (M)NR and RKI include separable payloads. For one-way access to the asteroid surface, nanolanders like MASCOT are an ideal match for solar sails in micro-spacecraft format, i.e. in launch configurations compatible with ESPA and ASAP secondary payload platforms. Larger landers similar to the JAXA-dlr study of a Jupiter Trojan asteroid lander for the OKEANOS mission can shuttle from the sail to the asteroids visited and enable multiple NEA sample-return missions. The high impact velocities and re-try capability achieved by the RKI mission type on a final orbit identical to the target asteroid's but retrograde to its motion enables small spacecraft size impactors to carry sufficient kinetic energy for deflection. © 2019 IEEE.

关键词： Solar sails

来源：评论

学校读者我要写书评

暂无评论

Flights are ten a sail - Re-use and commonality in the design and system engineering of small spacecraft solar sail missions with modular hardware for responsive and adaptive exploration 70

Flights are ten a sail - Re-use and commonality in the desig...

引用

70th International Astronautical Congress, IAC 2019

作者： Grundmann, Jan Thimo Bauer, Waldemar Boden, Ralf Ceriotti, Matteo Chand, Suditi Cordero, Federico Dachwald, Bernd Dumont, Etienne Grimm, Christian D. Heiligers, Jeannette Hercík, David Hérique, Alain Ho, Tra-Mi Jahnke, Rico Kofman, Wlodek Lange, Caroline Lichtenheldt, Roy McInnes, Colin Meß, Jan-Gerd Mikschl, Tobias Mikulz, Eugen Montenegro, Sergio Moore, Iain Pelivan, Ivanka Peloni, Alessandro Plettemeier, Dirk Quantius, Dominik Reershemius, Siebo Renger, Thomas Riemann, Johannes Rogez, Yves Ruffer, Michael Sasaki, Kaname Schmitz, Nicole Seboldt, Wolfgang Seefeldt, Patric Spietz, Peter Spröwitz, Tom Sznajder, Maciej Tóth, Norbert Vergaaij, Merel Viavattene, Giulia Wejmo, Elisabet Wiedemann, Carsten Wolff, Friederike Ziach, Christian DLR German Aerospace Center Institute of Space Systems Robert-Hooke-Str. 7 Bremen28359 Germany Consultants to DLR Institute of Space Systems University of Glasgow GlasgowG12 8QQ United Kingdom Telespazio-VEGA Darmstadt Germany Faculty of Aerospace Engineering FH Aachen University of Applied Sciences Hohenstaufenallee 6 Aachen52064 Germany Institute for Geophysics and Extraterrestrial Physics Technical University Braunschweig Germany Université Grenoble Alpes CS 40700 Grenoble Cédex 938058 France DLR German Aerospace Center Robotics and Mechatronics Center Weßling82234 Germany Informatik 8 Universität Würzburg Am Hubland Würzburg97074 Germany Fraunhofer Heinrich Hertz Institute Berlin Germany Dresden University of Technology RF Engineering Dresden Germany DLR German Aerospace Center Institute of Planetary Research Rutherfordstr. 2 Berlin12489 Germany DLR German Aerospace Center Institute of System Dynamics and Control Wessling82234 Germany Space Research Centre PAS Warsaw Poland TU Delft Delft Netherlands Institute of Space Systems Technische Universität Braunschweig Hermann-Blenk-Str. 23 Braunschweig38108 Germany

The exploration of small solar system bodies started with fast fly-bys of opportunity on the sidelines of missions to the planets. The tiny new worlds seen turned out to be so intriguing and different from all else (and each other) that dedicated sample-return and in-situ analysis missions were developed and launched. Through these, highly efficient low-thrust propulsion expanded from commercial use into mainstream and flagship science missions, there in combination with gravity assists propulsion. In parallel, the growth of small spacecraft solutions accelerated in numbers as well as individual spacecraft capabilities. The on-going missions OSIRIS-REX (NASA) or HAYABUSA2 (JAXA) with its landers MINERVA-II and MASCOT, and the upcoming NEASCOUT mission are examples of this synergy of trends. The continuation of these and other related devlopments towards a propellant-less and highly efficient class of spacecraft for solar system exploration emerges in the form of small spacecraft solar sails designed for carefree handling and equipped with carried landers and application modules. These address the needs of all asteroid user communities - planetary science, planetary defence, and in-situ resource utilization - as well as other fields of solar system science and applications such as space weather warning and solar observations. Already the dlr-ESTEC GOSSAMER Roadmap for Solar Sailing initiated studies of missions uniquely feasible with solar sails such as Displaced L1 (DL1) space weather advance warning and monitoring and Solar Polar Orbiter (SPO) delivery, which demonstrate the capabilities of near-term solar sails to reach any kind of orbit in the inner solar system. This enables Multiple Near-Earth Asteroid (NEA) rendezvous missions (MNR), from Earth-coorbital to extremely inclined and even retrograde target orbits. For these mission types using separable payloads, design concepts can be derived from the separable Boom Sail Deployment Units characteristic of dlr GOS

关键词： Solar sails

来源：评论

学校读者我要写书评

暂无评论

Autonomous parking using a highly maneuverable robotic vehicle 19

Autonomous parking using a highly maneuverable robotic vehic...

引用

19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014

作者： Schaub, Alexander De La Cruz, Juan Carlos Ramirez Burschka, Darius Institute of System Dynamics and Control Robotics Mechatronics Center - DLR Wessling82234 Germany Institute of Robotics and Mechatronics Robotics Mechatronics Center - DLR Wessling82234 Germany Department of Computer Science Technische Universität München Garching bei München85748 Germany

ISBN: (纸本)9783902823625

This work presents a novel autonomous parking concept for a four wheel-steerable robotic electric vehicle called ROboMObil (ROMO). Its extraordinary maneuverability, including rotations and lateral driving, and its capability of autonomous driving is demonstrated in the application of parallel parking. The whole process is described starting with the perception to identify a suitable parking spot in the near environment, planning the maneuver, and executing it autonomously. The proposed parking method is free of assumptions and does not use any information about the environment from an external source. Test results with the real vehicle are presented to show the feasibility of the concept. © IFAC.

关键词： Maneuverability

来源：评论

学校读者我要写书评

暂无评论

Worst case braking trajectories for robotic motion simulators

Worst case braking trajectories for robotic motion simulator...

引用

IEEE International Conference on robotics and Automation (ICRA)

作者： Andreas Labusch Tobias Bellmann Karan Sharma Johann Bals German Aerospace Center (DLR) Institute of System Dynamics and Control Oberpfaffenhofen Germany German Aerospace Center (DLR) Institute of Robotics and Mechatronics Oberpfaffenhofen Germany

Motion simulators based on industrial robots can produce high dynamic accelerations and velocities compared to classical hydraulic hexapod systems. In case of emergency stops, large and possibly harmful accelerations can occur. This paper aims to provide an optimization procedure to generate worst case trajectories in order to test for these harmful accelerations, by maximizing the kinetic energy prior the emergency stop. The dynamical and mechanical limits of the robot are considered as constraints of the optimization criterion. An exemplary worst case trajectory is simulated using a braking model and the resulting Head Injury Criterion (HIC) is calculated and compared with older tests, using non-optimized trajectories. A significant higher, yet with the current robot dynamics not harmful HIC value can be generated.

关键词： Trajectory Acceleration Joints Kinetic energy Service robots Optimization

来源：评论

学校读者我要写书评

暂无评论

Autonomous Parking using a Highly Maneuverable Robotic Vehicle

引用

IFAC Proceedings Volumes 2014年第3期47卷 2640-2645页

作者： Alexander Schaub Juan Carlos Ramirez de la Cruz Darius Burschka Institute of System Dynamics and Control Robotics Mechatronics Center - DLR 82234 Wessling Germany Institute of Robotics and Mechatronics Robotics Mechatronics Center - DLR 82234 Wessling Germany Department of Computer Science Technische Universität München 85748 Garching bei München Germany

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：