检索结果-内蒙古大学图书馆

IEEE Sensors

作者： Kagan Incetan Rishi Mohan Henry Stoutjesdijk Nelson Fernandes Bram de Jager Eindhoven University of Technology Control Systems Technology Eindhoven The Netherlands Philips Medical Systems Mechatronics Development Cluster Best The Netherlands

ISBN: (纸本)9781728116358

Optimal clinical workflow leads to faster treatment times and a potential to cater to a larger number of patients. A key part of this is preventing collisions between moving medical systems and patient. For interventional environments, high-speed rotational angiography (RA) scans are prone to potential collisions between the C-arm X-ray system and the patient. To ensure safety, a low speed safety-run is executed before the actual high-speed scan. However, several iterations of the safety- run are often required before a scan is collision-free leading to a suboptimal clinical work-flow. This work proposes a RGB-D camera based collision prediction system which detects collisions before the actual RA scan. Additionally, a motion planner is designed to provide appropriate patient repositioning such that the collision is avoided. The system is introduced as a first proof- of-concept to eliminate the safety-run and improve clinical safety and workflow.

关键词： Collisions Workflow Avoidance Moving and Lifting Patients Angiography scanning Cameras Rotational Patients

来源：评论

学校读者我要写书评

暂无评论

Coherent EUV scatterometry of 2D periodic structure profiles with mathematically optimal experimental design

arXiv

引用

arXiv 2025年

作者： Klein, Clay Jenkins, Nicholas W. Shao, Yunzhe Li, Yunhao Park, Seungbeom Kim, Wookrae Kapteyn, Henry C. Murnane, Margaret M. Department of Physics JILA & STROBE NSF Science & Technology Center University of Colorado & NIST BoulderCO United States Core Technology R&D Team Mechatronics Research Samsung Electronics Co. Ltd. Hwasung Korea Republic of Advanced Process Development Team 4 Semiconductor R&D Center Samsung Electronics Co. Ltd. Hwasung Korea Republic of KMLabs Inc. 4775 Walnut Street #102 BoulderCO80301 United States

Extreme ultraviolet (EUV) scatterometry is an increasingly important metrology that can measure critical parameters of periodic nanostructured materials in a fast, accurate, and repeatable manner and with high sensitivity to nanoscale structure and material composition. Because of this, EUV scatterometry could support manufacturing of semiconductor devices or polymer metamaterials, addressing the limitations of traditional imaging methods such as resolution and field of view, sample damage, throughput, or low sensitivity. Here we use EUV scatterometry to measure the profile of an industrially relevant 2D periodic interconnect structure, using λ = 29 nm light from a table-top high harmonic generation source. We show that EUV scatterometry is sensitive to out-of-plane features with single-nanometer sensitivity. Furthermore, we also apply a methodology based on the Fisher information matrix to optimize experimental design parameters, such as incidence angles and wavelength, to show how measurement sensitivity can be maximized. This methodology reveals the strong dependence of measurement sensitivity on both incidence angle and wavelength — even in a simple two-parameter case. Through a simultaneous optimization of incidence angles and wavelength, we determine that the most sensitive measurement of the quantities of interest can be made at a wavelength of ∼14 nm. In the future, by reducing sample contamination due to sample preparation, deep sub-nanometer sensitivity to axial profiles and 2D structures will be possible. Our results are an important step in guiding EUV scatterometry towards increased accuracy and throughput with a priori computations and by leveraging new experimental capabilities. © 2025, CC BY.

关键词： Fisher information matrix

来源：评论

学校读者我要写书评

暂无评论

Effect of Clutch Control to Improve Launch Quality for a Power Shuttle Tractor During Launching

SSRN

引用

SSRN 2023年

作者： Ahn, Da-Vin Kim, Kyeongdae Choi, Kyujeong Lee, Jin Woong Kim, Jeong-Gil Yu, Jihun Kim, Heung-Sub Seo, Jaho Park, Young-Jun Department of Biosystems Engineering College of Agriculture and Life Sciences Seoul National University Seoul Korea Republic of Convergence Major in Global Smart Farm College of Agriculture and Life Sciences Seoul National University Seoul Korea Republic of Smart Agricultural Machinery R&D Group Korea Institute of Industrial Technology Gimje Korea Republic of Tractor Advanced Development Group LS Mtron Anyang14118 Korea Republic of Department of Smart Industrial Machine Technologies Korea Institute of Machinery and Materials Daejeon34103 Korea Republic of Department of Automotive and Mechatronics Engineering Ontario Tech University 2000 Simcoe Street North OshawaONL1G 0C5 Canada Research Institute for Agriculture and Life Science Seoul National University Seoul Korea Republic of

The effect of clutch control parameters on the performance of tractor hydraulic systems was investigated in this study to improve the launch quality of the power shuttle tractor under launch conditions. A power shuttle tractor model for launch control was designed as an integrated mechanical, hydraulic, and electric system;a mathematical model was designed for each subsystem, and nonlinear elements were modeled based on the test data. The designed model was validated by comparing the results of the tractor field test with the simulation results. Launch quality was evaluated based on response time and mean jerk. The larger the clutch pressure gradient in the torque phase, the larger is the mean jerk of the tractor. Further, an appropriate fill pulse pressure is desired because excessive fill pulse pressure can cause overfilling and adversely affect launch quality. A smooth launch is required to improve launch quality;however, if the clutch pressure is small, the launch completion time becomes longer, which deteriorates the launch response, and necessitates a compromise. © 2023, The Authors. All rights reserved.

关键词： Tractors (truck)

来源：评论

学校读者我要写书评

暂无评论

Prediction model and loosening characteristics of a bolted connection system under torsional excitation

引用

Frontiers of Mechanical Engineering 2025年第3期20卷 20-20页

作者： Wujiu PAN Xianmu LI Kuishan KONG Jian LI Junyi WANG Jianwen BAO Peng GAO Xianjun ZENG Peng NIE 1School of Mechatronics Engineering Shenyang Aerospace University Shenyang 110136 China 2Key Laboratory of Rapid Development & Manufacturing Technology for Aircraft (Ministry of Education) Shenyang Aerospace University Shenyang 110136 China 3Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110169 China 4Hunan Aviation Powerplant Research Institute Aero Engine Corporation of China Zhuzhou 412002 China 5College of Aerospace Engineering Chongqing University Chongqing 400044 China

In the rotor system of aero-engines, the main purpose of a bolted flange connection structure is to transfer torque and speed, and the rotor system may exhibit bolt loosening and connection structure failure under complex working conditions, high speed rotation, and external excitation unbalanced force. In addition, the bolted connection structure in the rotor system is mainly subjected to torsional vibration excitation, and using experimental methods to analyze the dynamic response law of different structural parameters of a bolted connection structure under torsional vibration excitation is complicated. Therefore, on the basis of the concentrated mass method and the elastic interaction characteristics within the bolted system, this study establishes dynamic models of one-bolted and multi-bolted connection structural systems under torsional excitation. On the basis of this dynamic model, the dynamic response characteristics of different thread parameters, external excitation, bolt stiffness, and compression stiffness of the connected parts in a one-bolted connection system and the influence laws of different elastic modulus, bolt numbers, and the thickness of the connected parts on the loosening of the multi-bolted connection system are analyzed. Results show that small thread pitch, external excitation amplitude and frequency, compressive stiffness, bolt stiffness, and elastic modulus and large tooth angle, number of bolts, and thickness of connected parts can appropriately improve the anti-loosening performance of the bolted connection system. This study also uses a comparative verification method combining finite element simulation and experiment to verify the correctness of the established dynamic model effectively.

关键词： bolted connection bolt looseness bolt stiffness torsional excitation dynamic model

来源：评论

学校读者我要写书评

暂无评论

Simulation and Experimental Verification of Sweep Frequency Vibration Fatigue for Motor Controller of Integrated Electric Drive System for Electric Vehicle

引用

IOP Conference Series: Earth and Environmental Science 2021年第3期632卷

作者： Qi Xie Fei Xiong Jing Liu Chen Chen Yuedong Yang Zhengwei Ma GAC Automotive Research& Development Centre Guangzhou China College of Mechatronics and Control Engineering Shenzhen University Shenzhen China College of Urban Transportation and Logistics Shenzhen Technology University Shenzhen China

The motor controller of the integrated drive system for electric vehicles has the risk of sweep frequency vibration fatigue (SFVF) failure in the frequency range of 100 ∼ 440 Hz. In this paper, a finite element simulation method of SFVF for an integrated motor controller is introduced. The failure position of the motor controller component is predicted using this simulation method, which is consistent with the fracture position of the sweep frequency vibration fatigue test (SFVFT). This indicates that the simulation method is accurate. And the structural optimization suggestions are also put forward using this method. The optimized motor controller meets the requirements of SFVFT. This indicates that it is feasible to use this method during the design process of the motor controller for integrated drive system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Dynamic modelling and vibration analysis of dual-rotor system with inter-shaft sprag clutch and bearings

Dynamic modelling and vibration analysis of dual-rotor syste...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Chuang Huang Yongqiang Zhao Ming Liu Zhen Fu School of Mechatronics Engineering Harbin Institute of Technology Harbin China Intelligent Connected Vehicle Development Institute China FAW Group Corporation Changchun China

ISBN: (纸本)9781728133997

In this paper, a new analytical model is developed for dual-rotor system with inter-shaft sprag clutch and bearings, which consists of the inner shaft, the outer shaft, the inter-shaft sprag clutch and bearings. First, the inner and outer shafts are modeled as six degrees freedom Timoshenko's beams including the centrifugal force and gyroscopic effects. Then, the sprag clutch with profile modification is firstly modeled as a torsional finite element based on its load-deflection relationship, and the inter-shaft bearings are modeled as standard nonlinear finite elements including the centrifugal force and gyroscopic moments of the rolling elements of bearings. In subsequent analysis, the natural frequency and mode shape of the system are analyzed and verified. The new model will be useful to investigate the coupled vibration of bending and torsion and contribute to the dynamic design of rotor system with inter-shaft sprag clutch and bearings.

关键词： Voltage control Manganese

来源：评论

学校读者我要写书评

暂无评论

Correction: Securing fog computing in healthcare with a zero-trust approach and blockchain

引用

EURASIP Journal on Wireless Communications and Networking 2025年第1期2025卷 1-1页

作者： Kaur, Navjeet Mittal, Ayush Lilhore, Umesh Kumar Simaiya, Sarita Dalal, Surjeet Saleem, Kashif Ghith, Ehab Seif Apex Institute of Technology (CSE) Chandigarh University Mohali India Infosys Limited Chandigarh India Department of Computer Science and Engineering Galgotia University Greater Noida India Galgotias Multi-Disciplinary Research & Development Cell(G-MRDC) Galgotias University UP India Arba Minch University Arba Minch Ethiopia Department of Computer Science and Engineering Amity University Gurugram India Department of Computer Science & Engineering College of Applied Studies & Community Service King Saud University Riyadh Saudi Arabia Department of Mechatronics Faculty of Engineering An Shams University Cairo Egypt

来源：评论

学校读者我要写书评

暂无评论

Design and development of a robot for spraying fertilizers and pesticides for agriculture

引用

Materials Today: Proceedings 2023年 81卷 242-248页

作者： Afif Shazwan Abdul Ghafar Sami Salama Hussen Hajjaj Kisheen Rao Gsangaya Mohamed Thariq Hameed Sultan Mohd Fazly Mail Lee Seng Hua Department of Mechanical Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Centre for Advanced Mechatronics and Robotics (CaMaRo) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Institute of Informatics and Computing in Energy (IICE) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Department of Aerospace Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Aerospace Malaysia Innovation Centre (944741-A) Prime Minister’s Department MIGHT Partnership Hub Jalan Impact 63000 Cyberjaya Selangor Darul Ehsan Malaysia Farm Mechanization Program Engineering Research Centre Malaysian Agricultural Research and Development Institute (MARDI) 43400 Serdang Selangor Darul Ehsan Malaysia Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

The agriculture industry is one that is highly resource- and labour-intensive. As such, farmers are increasingly turning to technology and automation to address this issue. However, agricultural robots are far too complicated, slow, and costly to be made publicly available. As a result, the agriculture sector still lags behind in integrating modern technologies. This research paper details the development of a low-cost agricultural robot for spraying fertilizers and pesticides in agriculture fields as well as for general crop monitoring. The prototype system is a two-wheeled robot that consists of a mobile base, a spraying mechanism, a wireless controller for controlling the robot movement, and a camera for crop health and growth monitoring as well as detecting the presence of pests in the agriculture field. Tests conducted on the prototype system show that while the productivity of the robot in terms of crop coverage is slightly lower than a human worker, the labour cost savings afforded by the agricultural robot prototype is much greater as it functions completely in an autonomous mode and only requires the operator to control the robot when placing it at the start of the crop path. Furthermore, the prototype system also provides greater resource savings and reduction in the contamination of underground water sources due to leeching process, thus achieving precision agriculture goals. Lastly, the excellent battery life of the prototype system ensures that there will be no increase in the operation times and reduction in the efficiency of the fertilizer and pesticide spraying process due to the recharging times when replacing human workers. Future recommendations include making the agricultural robot fully autonomous, using either a rail- or line-following system, to further reduce the labour requirements and costs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Redesigning dispenser component to enhance performance crop-dusting agriculture drones

引用

Materials Today: Proceedings 2023年 81卷 166-172页

作者： Rajvin Subramaniam Sami Salama Hussen Hajjaj Kisheen Rao Gsangaya Mohamed Thariq Hameed Sultan Mohd Fazly Mail Lee Seng Hua Department of Mechanical Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Centre for Advanced Mechatronics and Robotics (CaMaRo) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Institute of Informatics and Computing in Energy (IICE) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Department of Aerospace Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Aerospace Malaysia Innovation Centre (944741-A) Prime Minister’s Department MIGHT Partnership Hub Jalan Impact 63000 Cyberjaya Selangor Darul Ehsan Malaysia Farm Mechanization Program Engineering Research Centre Malaysian Agricultural Research and Development Institute (MARDI) 43400 Serdang Selangor Darul Ehsan Malaysia Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

Agricultural drones are Unmanned Aerial Vehicles (UAVs) applied to farming in order to help increase crop production and improve farm efficiency. Crop-dusting drones are able to spray powdered fertilizer, pesticide, or insecticide on crops from the air, resulting in reduced costs and increased efficiency compared to traditional methods. The objective of this research work was to improve and enhance the performance of the crop-dusting process using agricultural drones. This research paper details the development of an improved storage container design and stabilized release mechanism for crop-dusting. To stabilise the release of payload when the drone is moving or swaying in the air, a gimbal mechanism was added to the release mechanism in which weights were used to produce constant downward force which balances the mechanism. Tests conducted on the prototype system showed that it performs as required. The stabilization tests show an improvement in accuracy of granule spread when using the stabilized release mechanism developed in this research work. As such, the wastage of fertilizers and pesticides can be reduced. The prototype system was also found to much more capable at carrying heavier loads for a longer period of time compared to current designs. Thus, using the prototype system developed for this research work, the size of storage container as well as the weight of fertilizer or pesticide granule payloads can be increased.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Autonomous fertilizer mixer through the Internet of Things (IoT)

引用

Materials Today: Proceedings 2023年 81卷 295-301页

作者： Abdul Hadi Ishak Sami Salama Hussen Hajjaj Kisheen Rao Gsangaya Mohamed Thariq Hameed Sultan Mohd Fazly Mail Lee Seng Hua Department of Mechanical Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Centre for Advanced Mechatronics and Robotics (CaMaRo) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Institute of Informatics and Computing in Energy (IICE) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Department of Aerospace Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Aerospace Malaysia Innovation Centre (944741-A) Prime Minister’s Department MIGHT Partnership Hub Jalan Impact 63000 Cyberjaya Selangor Darul Ehsan Malaysia Farm Mechanization Program Engineering Research Centre Malaysian Agricultural Research and Development Institute (MARDI) 43400 Serdang Selangor Darul Ehsan Malaysia Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

Organic fertilizers have been used since the dawn of mankind to improve soil fertility and promote crop growth. However, the process of preparing organic fertilizers for use in agricultural activities is a labour-intensive and time-consuming procedure. Thus, in order to reduce labour costs and improve the efficiency of organic fertilizer preparation, automated organic fertilizer mixers were developed. For this research work, an improved organic fertilizer mixer based on the Internet of Things (IoT) technology capable of monitoring the status of fertilizer production remotely and providing updates and alerts to workers was developed. The aim of this work was to further reduce labour workload and costs, thus increasing efficiency of the organic fertilizer mixing process. In order to accommodate the IoT monitoring system, several modifications and design changes were carried out on the prototype of an automated organic fertilizer mixer. Tests conducted on the prototype unit showed that it performs as required. The IoT monitoring system successfully captures and uploads information on the weight of agricultural waste mixture in the storage drum to the IoT platform. This information can then be used to alert workers on when to add more agricultural waste material to the mixture or remove the processed organic fertilizer. Furthermore, an overall operational cost comparison of different organic fertilizer production methods showed that the automated organic fertilizer prototype provides operational cost savings of over 5 times when compared to current automated systems. Future work includes further automation to the agricultural waste filling and organic fertilizer removal process.

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：