Journal of Mechanical Design最新文献_第3页

A Unified Real-time Motion Generation Algorithm for Approximate Position Analysis of Planar N-Bar Mechanisms 用于平面 N 杆机构近似位置分析的统一实时运动生成算法

IF 3.3 3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-23 DOI: 10.1115/1.4064132

Z. Lyu, A. Purwar, Wei Liao

引用次数: 0

Does Fan Feel and Visibility during Thermostat Interaction Affect Temperature Selection in Warm Ambient Conditions? 在温暖的环境条件下，恒温器互动时的风扇感和可见度是否会影响温度选择？

IF 3.3 3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-20 DOI: 10.1115/1.4064100

Alexa Rea, Laura Corbit, L.H. Shu

引用次数: 0

Nonlinear evaluation of a large-stroke coiled L-shape compliant guiding mechanism with constant stiffness 具有恒定刚度的大冲程盘绕式 L 型顺应导引机构的非线性评估

IF 3.3 3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-17 DOI: 10.1115/1.4064074

Mingxiang Ling, Linfeng Zhao, Shilei Wu, Liguo Chen, Lining Sun

{"title":"Nonlinear evaluation of a large-stroke coiled L-shape compliant guiding mechanism with constant stiffness","authors":"Mingxiang Ling, Linfeng Zhao, Shilei Wu, Liguo Chen, Lining Sun","doi":"10.1115/1.4064074","DOIUrl":"https://doi.org/10.1115/1.4064074","url":null,"abstract":"Owing to the advantages of monolithic structure and little need for assembling, compliant guiding mechanisms appear to be an effective solution for decoupling multi-freedom precision motions but are still prone to geometric nonlinearities of parasitic error and stiffening effect for large strokes. This paper proposes a coiled L-shape compliant guiding mechanism featuring millimeter-scale strokes with a compact structure, constant stiffness and minimized parasitic error. The coiled compliant guiding mechanism is formed by convolving L-shape flexure beams in a zigzag configuration with decoupled XY motions achieved. Its geometrically nonlinear parasitic error, variation in stiffness and primary vibration are captured by using a dynamic beam constraint model (DBCM). It is theoretically, numerically and experimentally found, by comparing with double parallel guiding mechanisms, that the kinetostatic and dynamic behaviors of the coiled L-shape compliant mechanism are nearly independent on the applied force within the intermediate-deformation ranges. Such a weak geometric nonlinearity with the minimized influence of axially-loaded stiffening and kinematics-arching effects is much different from the double parallel guiding mechanisms. The obtained results indicate that large strokes with constant stiffness and invariable resonance frequency can be realized, which also allows small parasitic errors.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"33 3","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139266158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and mechanical validation of commercially viable, personalized passive prosthetic feet 商业上可行的个性化被动义足的设计和机械验证

IF 3.3 3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-17 DOI: 10.1115/1.4064073

Charlotte Folinus, V. Amos G. Winter

{"title":"Design and mechanical validation of commercially viable, personalized passive prosthetic feet","authors":"Charlotte Folinus, V. Amos G. Winter","doi":"10.1115/1.4064073","DOIUrl":"https://doi.org/10.1115/1.4064073","url":null,"abstract":"Current high-performance prosthetic feet work well for many users, but the low resolution of size and stiffness categories may limit walking performance for certain users. A line of prosthetic feet with a high resolution of sizes and stiffnesses, designed through amputee-specific personalization, could provide clinical and economic value. The lower leg trajectory error (LLTE) design framework facilitates the design of high-performance, amputee-specific prosthetic feet; however, previous foot prototypes were not designed to satisfy the economic, mechanical, and aesthetic requirements for commercial adoption. The aims of this work were to understand how a personalized, affordable prosthetic foot can align with the clinical-commercial ecosystem, innovate a viable future product, and inform other prosthesis designers of considerations required to connect innovation to real-world implementation. We evaluated needs by identifying how products, capital, and services flow between stakeholders, and we elucidated design requirements for a personalized prosthetic foot that can be manufactured, dis- tributed, and clinically provided. Based on material properties and manufacturing process capabilities, CNC machining of Nylon 6/6 satisfies these requirements. We present a novel parametric foot architecture that can be CNC machined, fits within a commercial foot shell, and can be designed for individual users' body characteristics and activity levels. Prototypes made using the new foot design behaved as anticipated (1-12% error in modeled displacement), satisfied industry-standard strength (ISO 10328) and mechanical performance (AOPA dynamic heel/keel) requirements, and elicited positive feedback from both amputees and prosthetists.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"1 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139265839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Disassembly and repairability of mechatronic products: insight for engineering design 机电一体化产品的拆卸和可修复性：对工程设计的启示

IF 3.3 3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-17 DOI: 10.1115/1.4064075

Núria Boix Rodríguez, Claudio Favi

{"title":"Disassembly and repairability of mechatronic products: insight for engineering design","authors":"Núria Boix Rodríguez, Claudio Favi","doi":"10.1115/1.4064075","DOIUrl":"https://doi.org/10.1115/1.4064075","url":null,"abstract":"Designing mechatronic products requires interdisciplinary skills and as products become more complex, the design of mechatronic systems plays a critical role. Repairing plays a key part in achieving a circular economy. Through repairability, the product lifespan can be extended, and combined with maintenance the rate of product replacement can be reduced. Within this context, the goal of this paper is to propose a design methodology (based on the EN 45554:2020 standard) for generating and implementing eco-design rules for disassembly and repair. The methodology has four phases, the first one is the identification of target components (those that are more likely to fail during the lifespan). The second phase encompasses the experimental disassembly analysis which can be manual or virtual. The third phase is the assessment of the Disassemblability Index which includes the analysis of parameters that affect the disassembly phase. The last phase is the implementation of the eco-design methodology for all the components that do not meet the minimum repairability requirements. A case study of electro-mechanical ovens is presented, targeting replaceable components. The results show that the use of this framework and the eco-design actions derived from it are successful in improving the repairability of the product and increasing the Disassemblability Index (30% on average) through a virtual analysis. A sensitivity analysis has been conducted to study the impact of parameter weight modification. This research contributes to advancing repairability and supporting the circular economy paradigm in mechatronic product design.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"32 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139265161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vehicle Crashworthiness Performance Prediction through Fusion of Multiple Data Sources 通过融合多种数据源预测车辆耐撞性能

IF 3.3 3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-16 DOI: 10.1115/1.4064063

Jice Zeng, Ying Zhao, Guosong Li, Zhenyan Gao, Yang Li, Saeed Barbat, Zhen Hu

{"title":"Vehicle Crashworthiness Performance Prediction through Fusion of Multiple Data Sources","authors":"Jice Zeng, Ying Zhao, Guosong Li, Zhenyan Gao, Yang Li, Saeed Barbat, Zhen Hu","doi":"10.1115/1.4064063","DOIUrl":"https://doi.org/10.1115/1.4064063","url":null,"abstract":"This study aims at improving the prediction accuracy of the Computer-Aided Engineering (CAE) model for crashworthiness performance evaluation at speeds beyond those defined by current regulations and public domain testing protocols. In this study, two scenarios are investigated: (1) improving CAE model prediction accuracy using test data of a vehicle type that is the same as that of the CAE model; (2) improving CAE model prediction accuracy using test data from two different types of vehicles (e.g., two different sizes of SUVs). In the first scenario, a novel approach is proposed in the displacement domain (deceleration vs. displacement) to enable data fusion to help recover the unmodeled physics in the CAE model. A nonlinear spring-mass model is used to simulate rigid-barrier vehicle frontal impact. A Gaussian process regression (GPR) model is then applied in conjunction with a Gaussian mixture model to capture the model bias of the nonlinear spring constant. In the second scenario, we propose a time domain method (deceleration vs. time) based on temporal convolutional network (TCN) and transfer learning. An initial TCN model is first trained by fusing CAE data with physical test data of the first vehicle type based on data augmentation. This data-augmented TCN model is then fine-tuned through transfer learning using CAE and test data of the second vehicle type. Cased studies are used to validate the proposed approaches, and to demonstrate their efficacy in improving the prediction accuracy of the CAE models.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"24 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139270766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficacy of Deep Neural Networks in Natural Language Processing for Classifying Requirements by Origin and Functionality: An Application of BERT in System Requirement 深度神经网络在自然语言处理中按来源和功能分类需求的有效性——BERT在系统需求中的应用

3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-13 DOI: 10.1115/1.4063764

Jesse Mullis, Cheng Chen, Scott Ferguson, Beshoy Morkos

{"title":"Efficacy of Deep Neural Networks in Natural Language Processing for Classifying Requirements by Origin and Functionality: An Application of BERT in System Requirement","authors":"Jesse Mullis, Cheng Chen, Scott Ferguson, Beshoy Morkos","doi":"10.1115/1.4063764","DOIUrl":"https://doi.org/10.1115/1.4063764","url":null,"abstract":"Abstract Given the foundational role of system requirements in design projects, designers can benefit from classifying, comparing, and observing connections between requirements. Manually undertaking these processes, however, can be laborious and time-consuming. Previous studies have employed Bidirectional Encoder Representations from Transformers (BERT), a state-of-the-art natural language processing (NLP) deep neural network model, to automatically analyze written requirements. Yet, it remains unclear whether BERT can sufficiently capture the nuances that differentiate requirements between and within design documents. This work evaluates BERT’s performance on two requirement classification tasks (one inter- document and one intra-document) executed on a corpus of 1,303 requirements sourced from five system design projects. First, in the “parent document classification” task, a BERT model is fine-tuned to classify requirements according to their originating project. A separate BERT model is then fine-tuned on a “functional classification” task where each requirement is classified as either functional or nonfunctional. Our results also include a comparison with a baseline model, Word2Vec, and demonstrate that our model achieves higher classification accuracy. When evaluated on test sets, the former model receives a Matthews correlation coefficient (MCC) of 0.95, while the latter receives an MCC of 0.82, indicating BERT’s ability to reliably distinguish requirements. This work then explores the application of BERT’s representations, known as embeddings, to identify similar requirements and predict requirement change.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"6 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134993750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A MACHINE LEARNING BASED TIRE LIFE PREDICTION FRAMEWORK FOR INCREASING LIFE OF COMMERCIAL VEHICLE TIRES 基于机器学习的商用车轮胎寿命预测框架

3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-13 DOI: 10.1115/1.4063761

Vispi Karkaria, Jie Chen, Chase Siuta, Damien Lim, Robert Radelescu, Wei Chen

{"title":"A MACHINE LEARNING BASED TIRE LIFE PREDICTION FRAMEWORK FOR INCREASING LIFE OF COMMERCIAL VEHICLE TIRES","authors":"Vispi Karkaria, Jie Chen, Chase Siuta, Damien Lim, Robert Radelescu, Wei Chen","doi":"10.1115/1.4063761","DOIUrl":"https://doi.org/10.1115/1.4063761","url":null,"abstract":"Abstract In the commercial freight industry, tire retreading decisions are often conservative due to limited knowledge of a tire’s remaining service life. This practice leads to increased costs and material waste. This paper proposes a machine learning–based approach for estimating tire casing life and retreadability, focusing on usage data rather than wear information. This approach could extend the tire’s lifespan and reduce landfill waste. Data integration from diverse tire casing measurement sources presents challenges, including imbalanced removal data. Our methodology addresses these challenges by using historical inspection, telematics, and finite element modeling (FEM) datasets. We introduce “Tire Casing Energy” as a comprehensive usage input and apply a Variance-Reduction Synthetic Minority Oversampling Technique (VR-SMOTE) for data imbalance rectification. A random forest model is used to estimate the state of the tire casing and the casing removal probability, with Bayesian optimization applied for hyperparameter tuning, enhancing model accuracy. The proposed prediction framework is able to differentiate different truck fleets and tire locations based on their usage parameters. With the aid of this machine learning model, the importance and sensitivity of different tire usage parameters can be obtained, which is beneficial to maximize tire life.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"6 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134992709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constraining the Feasible Design Space in Bayesian Optimization with User Feedback 考虑用户反馈的贝叶斯优化中可行设计空间的约束

3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-13 DOI: 10.1115/1.4063906

Cole Jetton, Matthew I. Campbell, Christopher Hoyle

{"title":"Constraining the Feasible Design Space in Bayesian Optimization with User Feedback","authors":"Cole Jetton, Matthew I. Campbell, Christopher Hoyle","doi":"10.1115/1.4063906","DOIUrl":"https://doi.org/10.1115/1.4063906","url":null,"abstract":"Abstract This paper develops a method to integrate user knowledge into the optimization process by simultaneously modelling feasible design space and optimizing an objective function. In engineering, feasible design space is a constraint similar to those in optimization problems. However, not all constraints can be explicitly written as mathematical functions. This includes manufacturing concerns, ergonomic issues, complex geometric considerations, or exploring material options for a particular application. There needs to be a way to integrate designer knowledge into the design process and, preferably, use that to guide an optimization problem. In this research, these constraints are modeled using classification surrogate models and incorporated with Bayesian optimization. By suggesting design options to a user and allowing them to box off areas of feasible and infeasible designs, the method models both the feasible design space and an objective function probability of new design targets that are more optimal and have a high probability of being feasible. This proposed method is first proven with test optimization problems to show viability then is extended to include user feedback. This paper shows that by allowing users to box off areas of feasible and infeasible designs, it can effectively guide the optimization process to a feasible solution.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134993477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing Waste Outflow to Motivate Water Conservation 减少废物外流，促进节约用水

3区工程技术

Journal of Mechanical Design Pub Date : 2023-11-08 DOI: 10.1115/1.4064042

Sarah Halabieh, L.H. Shu

{"title":"Reducing Waste Outflow to Motivate Water Conservation","authors":"Sarah Halabieh, L.H. Shu","doi":"10.1115/1.4064042","DOIUrl":"https://doi.org/10.1115/1.4064042","url":null,"abstract":"Abstract A novel intervention to increase water-conserving behavior was developed and tested. Behavior-change interventions range from information-based, where individuals have full control over whether they act on the provided information, to forcing/automation, where individuals have no control over the desired behavior. This study's intervention was devised to be more forceful than providing information alone, but unlike forcing/automation, still allows individuals to control whether they perform the desired behavior. While resource-conservation strategies tend to target resource intake, the studied intervention examines whether limiting resource outflow can in turn limit resource intake. Specific to water, this study explored whether reducing waste-water outflow, causing accumulation, can in turn reduce water inflow. Data was collected online using a simulation of handwashing at a sink, which had different sink-outflow rates. Amazon Mechanical Turk workers completed three randomly ordered handwashing simulations. Study participants (n=74) significantly reduced simulated consumption of water when it accumulated quickly in the sink (p&lt;0.001). Participants reduced simulated water consumption, on average by 14% at lower outflow rates, as they decreased inflow rates to prevent sink overflow. In contrast to informational interventions that rely on user motivation, reducing outflow significantly decreased simulated water usage, independent of participant-reported performance of other pro-environmental behaviors. Thus, reducing outflow may be effective regardless of individuals' motivation to act sustainably. Finally discussed is the value of online simulations to test pro-environmental behavior interventions. Potential directions for in-person testing are outlined as future work.","PeriodicalId":50137,"journal":{"name":"Journal of Mechanical Design","volume":"100 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135391172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0