Volume 7A: Dynamics, Vibration, and Control最新文献_第3页

IMECE2021 Front Matter IMECE2021前沿问题

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-fm7a

引用次数: 0

Deep Neural Network Real-Time Control of a Motorized Functional Electrical Stimulation Cycle With an Uncertain Time-Varying Electromechanical Delay 具有不确定时变机电延迟的机动功能电刺激周期的深度神经网络实时控制

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-73687

Hannah M. Sweatland, Brendon C. Allen, Max L. Greene, W. Dixon

引用次数: 2

Nonlinear Robust Control Design for a Gravity Compensation Mechanism Under Human Walking Pattern Scenarios 人体行走模式下重力补偿机构的非线性鲁棒控制设计

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-71712

Z. Ilhan, M. Chew

引用次数: 0

Mechanical Upgrade and Gait Development of Re-Sizable Quadruped, HARQ 可伸缩四足动物的机械升级和步态发展

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-69421

Salman Hussain, Akin Tatoglu, Kiwon Sohn

引用次数: 0

A Study on the Effects of Unmodelled Rotational Load Swing Dynamics on the Anti-Swing Control of an Overhead Crane 未建模旋转载荷摆动动力学对桥式起重机抗摆控制的影响研究

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-68336

Ho-Hoon Lee

引用次数: 1

A Framework for Spatial 3D Collision Models: Theory and Validation 空间三维碰撞模型框架:理论与验证

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-72981

Terje Sværen, B. Nygård, T. Impelluso

引用次数: 0

Peculiar Transmission Manipulation of Antisymmetric Lamb Waves via a Surface-Bonded Single-Layer Elastic Meta-Structure 表面键合单层弹性元结构中反对称兰姆波的特殊传输操纵

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-70726

Yiran Tian, Yanfeng Shen

{"title":"Peculiar Transmission Manipulation of Antisymmetric Lamb Waves via a Surface-Bonded Single-Layer Elastic Meta-Structure","authors":"Yiran Tian, Yanfeng Shen","doi":"10.1115/imece2021-70726","DOIUrl":"https://doi.org/10.1115/imece2021-70726","url":null,"abstract":"\u0000 Metasurfaces, treated as equivalent two-dimensional (2D) metamaterials, have the advantages of compactness and simplicity. In spite of the recent related booming researches, the non-perforated or surface-bonded ultrathin elastic metasurfaces have seldom been reported, since there exists a big challenge in designing such a single unit to satisfy the requirements of 2π phase span and simultaneous high transmission. In this paper, an elastic meta-structural functional unit is carefully designed, enabling an effective wave manipulation application for Structural Health Monitoring (SHM) and Non-destructive Evaluation (NDE) communities. Through conducting a series of parametric studies, the full 2π phase span and high transmittance can be achieved by a singl-elayer meta-structural unit. When proceeding to calculate the phase profile for realizing the full 2π phase span, the height of the unit cell stub is tuned by exploring a finite element model (FEM) using harmonic analysis. The nephograms of the phase shift varying with the stub height and excitation frequency exhibit the successful achievement of a full 2π span covering a wide frequency range. Further, to enable a high transmittance at the same time, two sets of parametric studies are complementally carried out through adjusting two additional structural parameters. Subsequently, various single-layer elastic meta-structures are designed with the proposed unit cell for the peculiar transmission manipulation of antisymmetric Lamb waves demonstrated by numerical simulations. The paper finishes with summary, concluding remarks, and suggestions for future work.","PeriodicalId":23585,"journal":{"name":"Volume 7A: Dynamics, Vibration, and Control","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78506489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robotic System for Plant Tending in Remote Habitat 远程生境植物抚育机器人系统

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-69733

Blake Hament, Paul Y. Oh, Danielle Carr, C. Moore, S. Dev, Ian Ferguson, Pedro Pena, J. Ehrlich

引用次数: 0

Elliptical Machines Using Adjustable Linkages 使用可调连杆的椭圆机

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-70047

Ali Safdar Naif, Hong Zhou

{"title":"Elliptical Machines Using Adjustable Linkages","authors":"Ali Safdar Naif, Hong Zhou","doi":"10.1115/imece2021-70047","DOIUrl":"https://doi.org/10.1115/imece2021-70047","url":null,"abstract":"\u0000 Elliptical machines are exercising or training machines that are used to imitate walking, jogging, running or climbing exercises. Different from treadmill machines, elliptical machine users never leave their feet away from the pedals, which reduces the pressures to the ankle, knee, and hip joints, and significantly lowers the impact injuries of users’ joints. The configurations of the elliptical motion commonly mimic the natural paths of the ankle, knee, and hip joints for walking, jogging or running, which further decreases the strains and stresses on users’ joints. In addition to low joint impact, another feature of elliptical machines is their integrated leg and arm movements that provide the dual lower and upper body exercises. Users of elliptical machines not only exercise their legs, but also push and pull the handlebars to strengthen their arms. Unlike treadmills, ellipticals are self-powered by user-generated motion and have no need for motor and belt conveyance. The closed trajectories of elliptical machines are generated through their linkages. The shapes and sizes of the closed trajectories depend on the linkage dimensions. The trajectory of an elliptical machine needs to meet the requirements for different exercises, and various short and tall people with a wide range of arm or leg sizes. If an elliptical machine has fixed linkage dimensions, its elliptical trajectory has only one shape and size, which does not provide flexibility. In order for an elliptical machine to have flexibility, its linkage has to be adjustable. Adjustable linkages are more difficult to design than linkages without adjustability. This research is motived by surmounting the challenges facing elliptical machines. Different types of elliptical machines (rear, front, and central drives) without and with adjustability are analyzed. Their elliptical output motions are simulated. The research results will provide useful guidelines for developing and promoting elliptical machines.","PeriodicalId":23585,"journal":{"name":"Volume 7A: Dynamics, Vibration, and Control","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77453572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Structural Damping Characteristics in the Electro-Mechanical Impedance Method 机电阻抗法中结构阻尼特性研究

Volume 7A: Dynamics, Vibration, and Control Pub Date : 2021-11-01 DOI: 10.1115/imece2021-72024

Aaron Misla, Andrei N. Zagrai

{"title":"On Structural Damping Characteristics in the Electro-Mechanical Impedance Method","authors":"Aaron Misla, Andrei N. Zagrai","doi":"10.1115/imece2021-72024","DOIUrl":"https://doi.org/10.1115/imece2021-72024","url":null,"abstract":"\u0000 The electro-mechanical impedance method is a useful tool for structural health assessment in a broad range of applications. In the past, the electro-mechanical impedance method was utilized for assessment of metallic aerospace structures. However, advancements in materials engineering have led to the emergence of composite materials as the preferred choice for many aerospace applications. Limited work exists on application of the electro-mechanical impedance method to composite materials. To evaluate the behavioral differences between metallic and composite materials, a study into the impedance response of one dimensional beam structures with surface-bonded thin piezoelectric wafer sensors was conducted. Euler-Bernoulli beam theory is incorporated in the development of an analytical solution, along with viscous and strain-rate damping models, to evaluate the interaction between the piezoelectric wafer and the resulting bending moment and axial force in the beam. Modeling results were compared to experimental observations. Experimentally obtained damping characteristics were utilized to update analytical and numerical electro-mechanical impedance models. The sensitivity of the electromechanical impedance method to detect damage at various distances from a piezoelectric sensor was evaluated in composite and metallic materials using beams of different lengths. Using the results from these studies and evaluation of the effects of attenuation and structural geometry suggestions for structural evaluation using the electro-mechanical impedance method are presented.","PeriodicalId":23585,"journal":{"name":"Volume 7A: Dynamics, Vibration, and Control","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74234962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0