Volume 5: Dynamics, Vibration, and Control最新文献

{"title":"Data-Driven Fault Detection in Composite Cylindrical Shells: Directing the Proper Orthogonal Decomposition Prospective Into an Artificial Neural Network Vision","authors":"Konstantinos N. Liontos, I. Georgiou","doi":"10.1115/imece2022-96255","DOIUrl":"https://doi.org/10.1115/imece2022-96255","url":null,"abstract":"\u0000 This paper presents a vibration data-driven study for damage detection in a physical cylindrical shell made of carbon fiber reinforced polymeric plies. The manufacturing method followed for the synthesis of this structure introduces numerous fault sites as potential initiators of damage propagation. Using three accelerometers, vibration datasets have been collected for damage detection by a classical vibration analysis method based on the change of the curvature of vibration shapes extracted by sectioning-at the value of a dominant natural frequency-the surface-formed landscape of the distribution of the dataset over the processed frequency-space domain. The existence and the position of damage sites in the cylinder are detected by computing the pointwise ratio of the section-based vibration shapes of the datasets. To verify and improve this technique, unleased is the unparalleled data reduction-computational analysis of the advanced proper orthogonal decomposition (POD) transform to detect damage sites as variations of POD modal shapes, being identified as invariants of the motion. The data-driven spirit of POD processing of datasets is conveyed further to support a potential artificial neural networks vision for fault detection by learning aspects of the physical system with training based on the collected datasets.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115612747","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}

{"title":"An Economical Approach Towards Bathymetric Mapping of Shallow Water Basins Using Unmanned Surface Vessel","authors":"D. Shetty, Rakshith Kotian, Steevan Loyd Sequeira, Pavithra N. R., U. Pruthviraj, Gangadharan KV","doi":"10.1115/imece2022-97015","DOIUrl":"https://doi.org/10.1115/imece2022-97015","url":null,"abstract":"\u0000 In recent years, the use of unmanned vehicles has advanced because of a growing number of civil applications such as firefighting or non-military security work, such as surveillance of pipelines etc. The application of these technologies with decreased cost and size has received attention in both civil and military applications. Recent advances in sensors, modeling and simulation and availability of open-source software and hardware for data integration has created an environment of remotely monitoring that was not possible a few years ago. This paper examines a niche cost-effective, portable Unmanned Surface Vessel that has been designed to capture the bathymetric profile of shallow water basins using single beam echosounder. Bathymetry is the measurement of the depth of water in oceans, rivers, or lakes. Bathymetric maps look a lot like topographic maps, which use lines to show the shape and elevation of land features. Today, echo sounders are used to make bathymetric measurements. Global shallow water bathymetry maps offer critical information to inform activities such as scientific research, environment protection, and marine transportation. Accurate mapping of shallow bathymetry is critical for understanding and characterizing coastal environments providing a foundation for measuring underwater light density, mapping and monitoring and planning marine operations and transportation. Methods for estimating shallow water bathymetry have suffered from a variety of trade-offs and limitations. Conventional methods such as shipborne sounding or airborne LiDAR have limited spatial coverage. The unit described in this paper has been designed and has been trained to acquire data in a predefined set path, minimizing the human intervention and the associated errors. A successful trial run was done for mapping the bed profile of the river basin in India. The vessel has been upskilled for capturing sonar data sets, with water quality parameters and soil samples using an automated auger. The vessel functions using the combined various open-source software and hardware tools for data assimilation, while the captured data sets are real-time transferred using IOT to Ground Controlled Station. The tropical river basin chosen is a part of Netravati River located in Dakshina Kannada District, Karnataka, India. This area is a part of the monsoon belt, and the Netravati riverbed is subjected to heavy sand deposition during a part of the year. The data on the excessive sand deposition is of immense value to the district and state administration. This study has been carried out at a frequency of 30 days and is provided as an input during non-monsoon period for district administration for outlining removal of excessive sand deposition monitoring of water quality in the estuarine ecosystem. The work done is a one-of-a-kind pilot study developed in-house using the recent advances seen in the world of open-source platforms. This paper demonstrates a unique application","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123283804","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}

{"title":"Development of a Soft Robotic Gripper for Carpet Handling","authors":"A. Abbas, A. Sahbel","doi":"10.1115/imece2022-95931","DOIUrl":"https://doi.org/10.1115/imece2022-95931","url":null,"abstract":"\u0000 The use of soft robotic grippers is an alternative to conventional rigid body grippers in industrial applications specifically in the handling of carpets. This paper presents, a novel design of a 3D soft robotic gripper based on a simulation model and experimental prototype that can be used for carpet handling applications. In addition, the fabrication method of the pneumatic soft robotic gripper is introduced. The pneu-net actuator geometrical parameters are optimized such as the thickness of the chamber walls and the internal structure of the chambers resulting in significantly improved pressure handling capabilities. The simple pneu-net and the modified actuator are tested at two different pressure 55 and 110 kPa, to check the range of motion. A single actuator is calculated to lift a maximum of five kilograms, with several actuators included in the gripper the weight carrying capabilities reached ten kilograms. The geometry was optimized to maximize weight carrying capabilities by increasing the amount of pressure the actuator can withstand. A finite element analysis using ABAQUS software is carried out to evaluate the stresses acting upon the soft gripper.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125172663","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}

{"title":"Development of a Compliant Gripper Driven by 3 DOF Soft Robot","authors":"R. Ramirez, Pt Angel Tran, Derek Price, Amir Ali Amiri Moghadam, A. Tekes","doi":"10.1115/imece2022-95204","DOIUrl":"https://doi.org/10.1115/imece2022-95204","url":null,"abstract":"\u0000 This study presents the design, development, and experimental testing of a single piece designed compliant gripper manipulated by a 3 DOF soft robot. The manipulator consists of two soft links. While the bottom arm is 2 DOF and is tendon driven by two servo motors, the SDOF upper arm is also tendon driven by a servo motor. The two-finger-designed compliant gripper is also actuated by a servo motor. The base of the robot holds the motors and the soft manipulator. The MATLAB Simscape model of the robot is created to perform deformation and motion analysis of the gripper and soft manipulator. The cad model of the robot is imported, and the manipulator parts are converted into soft links using discrete beam elements. The large deflecting hinges on the compliant grippers are also transformed to mimic the physical gripper. Since the soft manipulator and the compliant gripper were designed monolithically, the robot was 3D printed as a single piece using thermoplastic polyurethane (TPU). The gripper is tested for its grasping and lifting performance while recording the applied forces by the gripper using a Flex sensor. Using the opencv tool for image processing and object analysis, we used a dual-camera setup with a known environment to add intelligence to the robot. Since the manipulator is designed as soft, the gripper can reach any position within its working space with any orientation.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127327443","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}

{"title":"A New Approach to Nonlinear Dynamic Modeling and Vibration Analysis of Tensegrity Structures","authors":"S. Yuan, Wei-dong Zhu","doi":"10.1115/imece2022-94746","DOIUrl":"https://doi.org/10.1115/imece2022-94746","url":null,"abstract":"\u0000 Tensegrity structures have experienced continued research and development interests in the past several decades. Revealing dynamic characteristics of a tensegrity structure, for example: vibration analysis, is an important objective in structural design and analysis. Traditional dynamic modeling methods are inaccurate in predicting dynamic responding of a tensegrity structure, due to their neglection of internal displacements of structure members. To solve this issue, a new nonlinear dynamic modeling method for tensegrity structures is proposed in this paper. This method defines position of a structure member as a summation of boundary-induced terms and internal terms in a global coordinate system. A nonlinear dynamic model of a tensegrity structure is derived from Lagrange equation, as a system of ordinary differential equations. This dynamic model can be linearized at an equilibrium configuration for vibration analysis. As shown in simulation results, the proposed method can predict natural frequencies of a tensegrity structure with a better accuracy than the traditional methods. Unlike the traditional methods that can only predict dynamic responses in a low frequency domain, the proposed method can also reveal dynamic responses of a tensegrity structure in a higher frequency domain by only using a small number of internal terms.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117115397","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}

{"title":"Fuzzy Logic Based Fusion of 2D LIDAR and Depth Camera Data for Robust Perception of Obstacle Distance","authors":"H. Saksena, S. Anwar","doi":"10.1115/imece2022-95281","DOIUrl":"https://doi.org/10.1115/imece2022-95281","url":null,"abstract":"\u0000 Obstacle detection, avoidance and path finding for autonomous vehicles requires precise information of the vehicle’s environment for accurate navigation and decision making. As such vision and depth perception sensors have become an increasingly integral part of autonomous vehicle research and development work. The advancements made in vision sensors such as radars, Light Detection And Ranging (LIDAR) sensors and compact high resolution cameras is encouraging, however individual sensors can be prone to error/misinformation due to environmental factors such as scene illumination, object reflectivity, and object transparency. The application of sensor fusion in a given system, by the utilization of multiple sensors perceiving similar or relatable information over a network, is implemented to provide a more robust and complete system information and minimize the overall perceived error of the system. The primary objective of this work is to implement a smart and robust sensor fusion system using 2D LIDAR and a stereo depth camera to capture depth and color information of an environment. The depth points generated by the LIDAR are fused with the depth map generated by the stereo camera by a Fuzzy system that implements smart fusion and corrects any gaps in the depth information of the stereo camera. The results show that the output of the proposed fuzzy fusion algorithm provides a higher depth confidence than each of the individual sensors can provide.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121803104","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}

{"title":"Influence of the Anisotropic Characteristic on the Accuracy of Acoustic Emission Source Localization With L Shaped Sensor Cluster","authors":"Jiaying Sun, Zexing Yu, Chao Xu","doi":"10.1115/imece2022-94789","DOIUrl":"https://doi.org/10.1115/imece2022-94789","url":null,"abstract":"\u0000 Composite materials are increasingly being used in the structure of aircraft. However, this type of materials is commonly encountering damage companied with acoustic emission (AE) events. In order to ensure the safety of structures during service, it is urgent to develop structural health monitoring methods able to localize AE source in composite components as they occur. Kundu et al [1] for the first time proposed a technique using L-shaped clusters to localize AE source in anisotropic plates without knowing the pre-defined velocity. However, the direction dependent group velocity may lead to a large error if the group velocities in some anisotropic materials vary widely. In this paper, whether the characteristic of anisotropy has a great influence on the localization results and the principle of how this characteristic affects the AE source localization results are investigated. The results show that localization results of isotropic plate are obviously better than that of anisotropic plate due to the direction dependent velocities of anisotropic plate, which proves that the characteristic of anisotropy will affect AE source localization results. It is also found that the variation of localization orientation error is consistent with the local velocity gradient.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130664310","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}

{"title":"Reduced Theories for Thick Shells","authors":"M. A. De Rosa, M. Lippiello, I. Elishakoff","doi":"10.1115/imece2022-96660","DOIUrl":"https://doi.org/10.1115/imece2022-96660","url":null,"abstract":"\u0000 The present paper is part of a previous research, started in [1] with the proposal to neglect an energetic term in the dynamic analysis of Timoshenko-Ehrenfest beams. The resulting reduced theory turned out to be both simpler and more reliable than the complete, classical, approach. Whereas the original idea was heuristically justified, a sounder variationally consistent theory has been proposed in [2] and, later on, in [3]. Following the suggestion offered in [1–3], we initially describe the classical theory, and subsequently we propose two alternative hypotheses that lead to two differences aspects of the energy terms. Applying the variational approach, two new different boundary problems are deduced, which are direct generalizations of what was done previously. Both theories can be easily specialized for beams and plates. In addition, the theory is also specialized for the case of cylindrical shell.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127995783","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}

{"title":"Mechatronic System Design and Construction of a CNC Machine for Cutting Styrofoam Parts for RC Planes","authors":"S. Roa Prada","doi":"10.1115/imece2022-95972","DOIUrl":"https://doi.org/10.1115/imece2022-95972","url":null,"abstract":"Flying radio controlled, RC, planes has become both a sport and a form of entertainment that attracts an increasing number of practitioners worldwide. RC plane hobbyists design and build reduced-scale airplanes, unmanned aircrafts or replicas of existing full-scale ones, and fly them as often as possible to develop the necessary skills to go from basic flights to complex maneuvers and acrobatics and to race against other planes. Unfortunately, many practice flights do not go as planned and end with physical damage to the aircrafts. Companies dedicated to the production and marketing of RC planes require Computerized Numerical Controlled, CNC, machines to cut different parts for these model aircrafts due to their geometrical complexity, such as the case of the wings. Airplane wings must be light, strong and at the same time they have a tridimensional shape which is difficult to obtain by means of conventional manufacturing processes such as milling. Styrofoam is a convenient material for the fabrication of RC plane wings. The most common way to cut Styrofoam parts is by means of a taut hot wire. In order to achieve the complex shape of the wing, starting with a block of Styrofoam, the motion of the two ends of the taut hot wire must be carefully controlled and synchronized, to keep the tension in the wire and to obtain the desired shape in the part being manufactured. The best way to get this precise control for the two ends of the wire is by means of computerized numerical control. The aim of this research is to illustrate the steps for the mechatronic system design and construction of a machine for cutting RC plane Styrofoam parts to be used in the manufacturing of the aircrafts and the fabrication of spare parts for repairs after crash landings. The details for the development of each step of the mechatronic system design methodology are illustrated. The steps include design requirement specification, conceptual design, CAD modeling, structural analysis, sensors and actuators specification, assembly and testing. Once the functioning of the machine is validated, the quality of the manufactured parts must be tested so that they can be fitted to the corresponding aircrafts. The results demonstrated that the application of the methodology for the design of mechatronic systems facilitates the development of a robust device, such as a CNC machine, which synergistically combine the advantages of precision mechanics, electronics, control systems and computers to manufacture high quality parts for the RC planes industry.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132500056","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}

{"title":"Seismic Vibration Attenuation in Shear Buildings Using Nonlinear Energy Sink With Asymmetric Bi-Linear Element","authors":"E. Motato","doi":"10.1115/imece2022-96839","DOIUrl":"https://doi.org/10.1115/imece2022-96839","url":null,"abstract":"\u0000 Nonlinear Energy Sinks (NES) have gained popularity as passive vibration palliatives because have no preferred natural frequency and can resonate with any mode of the primary structure to which they are attached. Unfortunately, NESs are energy-dependent devices, characterized by energy thresholds where optimal NES design regions can be very close to low effective ones. It is then frequent that even negligible changes in the level of the exciting energy can significantly reduce the performance of previously tuned NES designs. Preliminary studies have shown that NES sensitivity to energy variations can be reduced by adding negative linear stiffness or bistable characteristics. In this work, the robustness of a tuned cubic NES is improved by adding an asymmetric bilinear element. This proposed modified NES is composed by a common cubic NES and a non-constant bilinear stiffness which includes a rope and two linear springs. In this numerical study, the vibration reduction performance of a cubic NESs and a Bilinear NES (BNES) is compared when the absorbers are attached to a three-story shear building structure. The building structure is excited using numerically generated seismic excitations characterized by different energy intensities while the vibration reduction performance of both absorbers are quantified using a specific index.","PeriodicalId":302047,"journal":{"name":"Volume 5: Dynamics, Vibration, and Control","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130252871","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}