检索结果-内蒙古大学图书馆

A Numerical Study on the Discharge Stabilization of Off-Gas in Carbonization Furnace

Transactions of the Korean Society of mechanical Engineers, B 2024年第4期48卷 211-217页

作者： Ko, Dong-Guk Kim, Min-Woo Lee, Kyo-Woo Im, Ik-Tae Dept. of Mechanical Engineering Chonbuk Nat'l Univ. Korea Republic of Div. of Mechanical Design Engineering Chonbuk Nat'l Univ. Korea Republic of

This study analyzes the influence of process variables to stably discharge the off-gas generated in the carbonization process of carbon fibers using the numerical analysis method. The process conditions included the feed speed and porosity of the tow, a fiber bundle structure of the carbon fiber, and nitrogen gas (N2) as the working fluid. The influence of the feed speed (vf) and porosity (ϵ) of the tow on the flow characteristics of the off-gas was investigated using the ANSYS FLUENT 20, a commercial computational fluid dynamics program. The flow of the off-gas discharged was stabilized when the feed speed of the tow was between 0.06 m/s and 0.10 m/s and the porosity was 0.5 and 0.7. © 2024 Korean Society of mechanical Engineers. All rights reserved.

关键词： Carbonization

来源：评论

学校读者我要写书评

暂无评论

Development of a Novel Three-Axis Force Sensor-Based Monitoring Device for Static Shoulder Therapy 2

Development of a Novel Three-Axis Force Sensor-Based Monitor...

引用

2nd International Conference on Emerging Trends in Information Technology and engineering, ic-ETITE 2024

作者： Pramod, Avinash S. Adithya, R.N. Palani, Poongavanam Varala, Naveenreddy V. Panigrahi, Siddhant Mohan, Santhakumar Thondiyath, Asokan Dept. of Engineering Design Iit Madras Chennai India Dept. of Mechanical Engineering Vit Vellore India Dept. of Mechanical Engineering Iit Palakkad Palakkad India

ISBN: (纸本)9798350328202

Static shoulder rehabilitation exercises are performed by stroke patients suffering from shoulder subluxation, which requires pushing the hand against a rigid surface by maintaining the elbow joint at a fixed position. This method, when carried out by patients at home in the absence of a physiotherapist, can overstrain the muscles. To overcome this problem, a compact and cost-effective tabletop monitoring device for static shoulder therapy is presented in this paper. It can be used for rehabilitation applications like strength and neural function recovery of the shoulder muscles, reducing shoulder subluxation in stroke patients, etc. This device is a rigid structure that utilizes a 3D printed three-axis force sensor to which a palm rest is attached for providing force feedback when the static force is applied by the user. This paper also presents the design of the three-axis force sensor along with system mechatronics design and calibration. The device is then tested by incorporating it with a simple game interface to carry out a game-based rehabilitation exercise. © 2024 IEEE.

关键词： Patient rehabilitation

来源：评论

学校读者我要写书评

暂无评论

Predictive control of zero moment point (ZMP) for terrain robot kinematics

引用

Materials Today: Proceedings 2023年 80卷 122-127页

作者： Haldar, Arijit I. Pagar, Nitin D. Dept. of Mechanical Engineering MIT School of Engineering MIT Art Design & Technology University Pune 412201 India

Maintaining stability and completing the required trajectory are the most important motion control issues for a six-kinematic-degrees-of-freedom legged robot. Zero-moment point (ZMP) approaches have evolved into an indispensable tool for obtaining dynamic equilibrium in humanoid or bipod robots for walking and handling. It's point where momentary, applied, and reactive forces cancel out. Despite ZMP advancements, legged robots continue to struggle with a number of essential skills exhibited by primates, such as like the Atlas robot, which can walk but not jump, run, or sprint. In complex environments, it may be incapable of interception. Hence, in this study, the effect of center of mass (CoM) trajectory on biped robot stability has been explored to understand the secure walking behavior. The research investigates the predictive control technique of adjusting CoM trajectory to generate stable walking patterns, which pioneered the concept of altering the CoM in advance during human walking and reacting to changing path restrictions. This section explains how to fix continuous variation's ZMP tracking problem. This allows monitoring the necessary ZMP, expanding gait generation systems and their analysis. Predictive control can produce secure walking models by manipulating the COM and CoG pathline in bipod robots. © 2022

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

Cutting Tool Condition Monitoring Based on a Machine Learning Approach by Using Vibration Signals 1

Cutting Tool Condition Monitoring Based on a Machine Learnin...

引用

1st International Conference on robotics, engineering, Science, and Technology, RESTCON 2024

作者： Tiwari, Saurabh Gunasegaran, V. Amarnath, M. Chelladurai, H. India Institute of Information Technology Design and Manufacturing Dept. of Mechanical Engineering Jabalpur India

ISBN: (纸本)9798350348842

In metal cutting operations, tool wear could result in higher energy utilization, excessive tool vibration, and deteriorated surface finish quality. Therefore, tool wear monitoring is critical to enhance manufacturing productivity and quality. This study proposes a new approach for monitoring and classification of tool wear with 192 data sets of turning experimental tests at different cooling approaches. The Daubechies wavelet transform is used to state the level of flank wear at different cooling approaches. The acquired vibration signals were processed in both the time and frequency domain with various features extracted. An artificial neural network (ANN) model was applied to detect the flank wear at dry, flood, and minimum quantity lubrication(MQL) cooling states. The results confirmed the ability of the monitoring system to detect the flank wear of the cutting insert by utilizing the tool vibration signals. © 2024 IEEE.

关键词： Neural networks

来源：评论

学校读者我要写书评

暂无评论

Optimization of L-PBF Laser Scan Path Compensation design for Mitigation Heat Accumulation in Overhang Structure Without Support Structure

引用

Transactions of the Korean Institute of Electrical Engineers 2024年第5期73卷 879-884页

作者： Kim, Do-Hyun Lee, Jae-Hyang Bae, Jeong-Hyeon Hong, Suk-Joon Yeon, Si-Mo Kang, Dong-Seok Son, Yong Research Institute of Intelligent Manufacturing & Materials Technology Korea Institute of Industrial Technology Korea Republic of Dept. of Mechanical Design Engineering Hanyang University Korea Republic of

This study aims to achieve uniformity in heat history by mitigating heat gradients during the production of overhang structures using the metal powder melting process. Specimens with a 30-degree overhang angle were created, and monitoring of thermal radiation intensity during the process confirmed heat accumulation in the specimens. The optimized laser scan path compensation design resulted in a 5.98% reduction in the coefficient of variation of thermal radiation intensity, and X-Ray CT imaging revealed an 80.47% reduction in deformation. With the optimized laser scan path compensation design developed in this study, it is anticipated that the metal powder melting method for manufacturing aerospace components with complex shapes, including overhang structures, will yield a reduction in deformation due to alleviated heat accumulation. Copyright © The Korean Institute of Electrical Engineers.

关键词： Powder metals

来源：评论

学校读者我要写书评

暂无评论

Evaluation of Thin-wall Structures and Inconel 718 Characteristics with Pulse Wave Mode in L-PBF

引用

Transactions of the Korean Institute of Electrical Engineers 2024年第5期73卷 871-878页

作者： Bae, Jeong-Hyeon Lee, Jae-Hyang Kim, Do-Hyun Kang, Dong-Seok Son, Yong Yeon, Si-Mo Research Institute of Intelligent Manufacturing & Materials Technology Korea Institute of Industrial Technology Korea Republic of Dept. of Mechanical Design Engineering Hanyang University Korea Republic of

Recent advances in additive manufacturing technology have made it possible to produce components with complex geometric structures using the Laser Powder Bed Fusion(L-PBF) process. However, there are still limitations when manufacturing extreme geometric shapes, such as thin wall. The thin walls are vulnerable to thermal deformation due to local heat accumulation in L-PBF. In this study, we applied a pulse mode with low thermal effect to manufacture ultra thin-wall structures using Inconel 718 in L-PBF and manufacturing characteristics were compared with the continuous wave emission mode. Then the process and mechanical properties of the pulse mode were analyzed through unit specimens and tensile specimens. Copyright © The Korean Institute of Electrical Engineers.

关键词： 3D printing

来源：评论

学校读者我要写书评

暂无评论

SYSTEMS THINKING APPROACH FOR ENERGYEFFICIENT MULTIPLEX HOUSING design: FOCUSING ON PASSIVE design STRATEGIES

引用

Journal of Green Building 2024年第4期19卷 225-246页

作者： Abdelkarim, Lina Burba, Blake Gardner, Kenisha Lyons, Daron Parker, Landon Ridenour, Jacob Traxler, Caleb Wood, Robyn Kim, Seong Dae Yang, Sungwoo Kim, Eun Young Dept. of Interior Architecture and Design University of Tennessee Chattanooga ChattanoogaTN37403 United States Dept. of Engineering Management and Technology University of Tennessee Chattanooga ChattanoogaTN3740 United States Dept. of Chemical Engineering University of Tennessee Chattanooga ChattanoogaTN37403 United States Dept. of Mechanical Engineering University of Tennessee Chattanooga ChattanoogaTN37403 United States

This article presents an energy-efficient multiplex housing project proposed in response to a local affordable housing crisis among low-income urban neighborhoods in Chattanooga, TN, in the United States. The project adopted the systems thinking approach, which encouraged design students to think beyond individual components and consider the interconnections of various systems within and around the multiplex housing, including daylight analysis, market analysis, life cycle assessment, and energy performance evaluation. To respond to the local-specific housing market and climate conditions, the students from the multidiscipline collaboratively engaged in the design process to understand the project’s environmental, social, and economic contexts and implement the passive design strategies into energy-efficient and affordable multiplex housing design to meet low-income families’ economic and social needs. The project site and design requirements were provided by a local nonprofit housing development organization that was a client of the project. This article highlights the significance of students’ systems thinking exercises in achieving energy-efficient affordable housing solutions in low-income urban neighborhoods through passive design strategies. © 2024, College Publishing. All rights reserved.

关键词： Systems thinking

来源：评论

学校读者我要写书评

暂无评论

design and Characterization of a Novel, Low-Cost Resistive Stretch Sensor Band for Interactions in HCI Applications 15

Design and Characterization of a Novel, Low-Cost Resistive S...

引用

15th International Conference on Computing Communication and Networking Technologies, ICCCNT 2024

作者： Sankar, B. Dhuraisamy, Arun Kumar Sindhu, S. Rajath, S. Dept. of Mechanical Engineering Bangalore560012 India PSG College of Technology Dept. of Robotics & Automation Engineering Coimbatore641004 India Dept. of Electronics Engineering Chennai600127 India Dept. of Design and Manufacturing Bangalore560012 India

ISBN: (纸本)9798350370249

In recent years, Human-Computer Interaction (HCI) technology has progressed significantly toward creating immersive experiences. Yet, the physical interaction within these environments often relies on hand controllers or hand tracking systems using gestures that lack the naturalistic feeling of grasping objects and are computationally expensive, respectively. This study introduces the Resistive Stretch Sensor (RSS) Band, a novel approach to bridging this gap by enabling interactions in HCI through the use of conductive rubber. The RSS is designed as a wearable band that conforms to the user's forearm, responding to muscle expansion during a full power grasp and release motion. As the RSS band stretches, its resistance value changes, which can be used as input for interactions within a virtual environment. The research characterises the conductive rubber material to determine the optimal RSS band design. The design process of the RSS band is detailed, considering ergonomic factors and the need for reliable and repeatable sensor output. A calibration method is developed to translate resistance changes into accurate input for HCI systems. The study concludes by examining the RSS's potential applications, such as in human-computer interaction. © 2024 IEEE.

关键词： Conductive Rubber Human-Computer Interaction Resistive Stretch Sensor

来源：评论

学校读者我要写书评

暂无评论

Physics-Constrained Data-Driven Dynamic Modeling of Underactuated robotic Systems 6

Physics-Constrained Data-Driven Dynamic Modeling of Underact...

引用

6th IEEE Novel Intelligent and Leading Emerging Sciences Conference, NILES 2024

作者： Asker, Ahmed Nile University Meng Program Giza Egypt Mansoura University Faculty of Engineering Production Engineering and Mechanical Design Dept. Egypt

ISBN: (数字)9798350378511

ISBN: (纸本)9798350378511

Underactuated robots are intriguing systems that have found numerous applications across various fields. These systems are characterized by having fewer actuators than degrees of freedom, resulting in complex behaviors that challenge traditional modeling and control techniques. Despite the prevalent use of data-driven modeling, extracting the dynamic model of underactuated systems is particularly challenging. This paper focuses on deriving from data the dynamic model of the Double Inverted Pendulum on a Cart (DIPC). The Euler-Lagrange equations are employed to derive the model's terms from the symbolic form of the DH parameters of the system. The coefficients of the model terms are obtained by formulating a constrained least-squares (LS) problem. The constraints leverage the properties of the robot's dynamic equations to limit the solution space to the physically possible ones. The conventional LS method failed to calculate the coefficients of the underactuated DIPC and got only the trivial solution. The proposed method accurately identifies the dynamic model of the underactuated DIPC, overcoming issues related to finding a solution by searching the null space of the regressor matrix and dealing with ill-conditioned regressor matrices. The proposed method provides a systematic approach for determining the dynamic model of actuated or underactuated robotic systems. Additionally, it can extend the capabilities of dynamic simulation software by extracting the nonlinear dynamic model of the robot from simulation data. © 2024 IEEE.

关键词： Inverted pendulum

来源：评论

学校读者我要写书评

暂无评论

INVESTIGATION OF COPPER INTERCONNECTS SUFFERED RELIABILITY PHYSICS FOR ADVANCED PACKAGING ARCHITECTURE

INVESTIGATION OF COPPER INTERCONNECTS SUFFERED RELIABILITY P...

引用

ASME 2024 International mechanical engineering Congress and Exposition, IMECE 2024

作者： Chuang, Jui-Chang Lee, Chang-Chun Microsystems Mechanical Design & Reliability Analysis Lab Taiwan Dept. of Power Mechanical Engineering National Tsing Hua University Hsinchu300 Taiwan

ISBN: (纸本)9780791888681

This study offers an insight into copper interconnects subjected to diverse physical loading conditions associated with the thermal, electrical, and mechanical domains. In order to estimate primary contributions among stress, temperature and electrical effects, a novel specimen has been designed to analyze the influence under multiple loading through images of distinct failure defects in this study. Three geometric variations in line widths for copper interconnects have been designed, specifically 15 μm, 10 μm, and 5 μm. This research examines the reliability physics of copper interconnects in advanced packaging architectures, assessing the effects of electromigration (EM), electromigration combined with thermomigration (TM), and stress migration (SM), alongside three distinct physical loading scenarios. The analytic results indicated that electrical resistance of copper interconnection is increased rapidly with reliability physics especially temperature condition. Copper interconnects with a width of 5 μm exhibit a 19.32% increase in electrical resistance under combined EM and TM effects, relative to solely EM effect. This experiment provides a method to estimate electrical resistance change under various reliability physics loading for advanced packaging structures featuring diverse copper interconnection design. © 2024 by ASME.

关键词： Packaging machines

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：