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Simplified Strategy for Trajectory Tracking Application of a Passive Suspension Rover-Type Mobile Robot 被动悬挂漫游型移动机器人轨迹跟踪应用的简化策略

Machines Pub Date : 2024-05-08 DOI: 10.3390/machines12050322

Jheison Duvier Diaz-Ortega, Octavio Gutiérrez-Frías, J. A. Aguirre-Anaya, A. Luviano-Juárez

引用次数: 0

Structural Optimization of an Unmanned Ground Vehicle as Part of a Robotic Grazing System Design 无人地面飞行器的结构优化，作为机器人放牧系统设计的一部分

Machines Pub Date : 2024-05-08 DOI: 10.3390/machines12050323

N. Korunović, Milan Banić, Vukašin Pavlović, Tamara Nestorović

{"title":"Structural Optimization of an Unmanned Ground Vehicle as Part of a Robotic Grazing System Design","authors":"N. Korunović, Milan Banić, Vukašin Pavlović, Tamara Nestorović","doi":"10.3390/machines12050323","DOIUrl":"https://doi.org/10.3390/machines12050323","url":null,"abstract":"Unmanned ground vehicles (UGVs) have gained increased attention in different fields of application; therefore, their optimization requires special attention. Lowering the mass of a UGV is especially important to increase its autonomy, agility, and payload capacity and to reduce dynamic forces. This contribution deals with optimizing a UGV unit prototype that, when connected with similar units, forms a moving electric fence for animal grazing. Together, these units form a robotic system that is intended to solve the critical problem of lack of human capacity in herding and grazing. This approach employs topology optimization (TO) and finite element analysis (FEA) to lower the mass of a UGV unit and validate the design of its structural components. To our knowledge, no optimization of this type of UGV has been reported in the literature. Here, we present the results of a case study in which a set of four load cases served as a basis for the optimization of the UGV frame. Response surface analysis (RSA) was used to identify the worst load cases, while substructuring was used to allow for more detailed meshing of the frame portion that was subjected to TO. Thereby, we demonstrate that the prototype of the UGV unit can be built using standard parts and that TO and FEA can be efficiently used to optimize the load-carrying structure of such a specific vehicle.","PeriodicalId":509264,"journal":{"name":"Machines","volume":" 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141001102","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

Self-Diagnostic Opportunities for Battery Systems in Electric and Hybrid Vehicles 电动汽车和混合动力汽车电池系统的自我诊断机会

Machines Pub Date : 2024-05-08 DOI: 10.3390/machines12050324

Szabolcs Kocsis Szürke, Gergo Sütheö, Péter Őri, István Lakatos

{"title":"Self-Diagnostic Opportunities for Battery Systems in Electric and Hybrid Vehicles","authors":"Szabolcs Kocsis Szürke, Gergo Sütheö, Péter Őri, István Lakatos","doi":"10.3390/machines12050324","DOIUrl":"https://doi.org/10.3390/machines12050324","url":null,"abstract":"The number of battery systems is also growing significantly along with the rise in electric and hybrid car sales. Different vehicles use different types and numbers of batteries. Furthermore, the layout and operation of the control and protection electronics units may also differ. The research aims to develop an approach that can autonomously detect and localize the weakest cells. The method was validated by testing the battery systems of three different VW e-Golf electric vehicles. A wide-range discharge test was performed to examine the condition assessment and select the appropriate state of charge (SoC) for all three vehicles. On the one hand, the analysis investigated the cell voltage deviations from the average; the tests cover deviations of 0 mV, 12 mV, 60 mV, 120 mV, and 240 mV. On the other hand, the mean value calculation was used to filter out possible erroneous values. Another important aspect was examining the relationship between the state of charges (SoC) and the deviations. Therefore, the 10% step changes were tested to see which SoC level exhibited more significant voltage deviations. Based on the results, it was observed that there are differences between the cases, and the critical range is not necessarily at the lowest SoC level. Furthermore, the load rate (current) and time of its occurrence play an important role in the search for a faulty cell. An additional advantage of this approach is that the process currently being tested on the VW e-Golf can be relatively simply transferred to other types of vehicles. It can also be a very useful addition for autonomous vehicles, as it can self-test the cells in the system at low power consumption.","PeriodicalId":509264,"journal":{"name":"Machines","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141001148","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

Enhancing Industrial Process Control: Integrating Intelligent Digital Twin Technology with Proportional-Integral-Derivative Regulators 增强工业过程控制：将智能数字孪生技术与比例-积分-微分调节器相结合

Machines Pub Date : 2024-05-07 DOI: 10.3390/machines12050319

Austėja Dapkutė, V. Siozinys, Martynas Jonaitis, Mantas Kaminickas, M. Siozinys

引用次数: 0

Mechanics 4.0 and Mechanical Engineering Education 力学 4.0 和机械工程教育

Machines Pub Date : 2024-05-07 DOI: 10.3390/machines12050320

Eusebio Jiménez López, Pablo Alberto Limon Leyva, Armando Ambrosio López, Francisco Javier Ochoa Estrella, Juan Delfín Vázquez, Baldomero Lucero Velázquez, Víctor Manuel Martínez Molina

{"title":"Mechanics 4.0 and Mechanical Engineering Education","authors":"Eusebio Jiménez López, Pablo Alberto Limon Leyva, Armando Ambrosio López, Francisco Javier Ochoa Estrella, Juan Delfín Vázquez, Baldomero Lucero Velázquez, Víctor Manuel Martínez Molina","doi":"10.3390/machines12050320","DOIUrl":"https://doi.org/10.3390/machines12050320","url":null,"abstract":"Industry 4.0 is an industrial paradigm that is causing changes in form and substance in factories, companies and businesses around the world and is impacting work and education in general. In fact, the disruptive technologies that frame the Fourth Industrial Revolution have the potential to improve and optimize manufacturing processes and the entire value chain, which could lead to an exponential evolution in the production and distribution of goods and services. All these changes imply that the fields of engineering knowledge must be oriented towards the concept of Industry 4.0, for example, Mechanical Engineering. The development of various physical assets that are used by cyber-physical systems and digital twins is based on mechanics. However, the specialized literature on Industry 4.0 says little about the importance of mechanics in the new industrial era, and more importance is placed on the evolution of Information and Communication Technologies and artificial intelligence. This article presents a frame of reference for the importance of Mechanical Engineering in Industry 4.0 and proposes an extension to the concept of Mechanics 4.0, recently defined as the relationship between mechanics and artificial intelligence. To analyze Mechanical Engineering in Industry 4.0, the criteria of the four driving forces that defined mechanics in the Third Industrial Revolution were used. An analysis of Mechanical Engineering Education in Industry 4.0 is presented, and the concept of Mechanical Engineering 4.0 Education is improved. Finally, the importance of making changes to the educational models of engineering education is described.","PeriodicalId":509264,"journal":{"name":"Machines","volume":"26 43","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141005629","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

Novel Probabilistic Collision Detection for Manipulator Motion Planning Using HNSW 使用 HNSW 进行机械手运动规划的新型概率碰撞检测

Machines Pub Date : 2024-05-07 DOI: 10.3390/machines12050321

Xiaofeng Zhang, Bo Tao, Du Jiang, Baojia Chen, Dalai Tang, Xin Liu

引用次数: 0

The Effect of a Ferromagnetic Steel Enclosure on Magnetic Shielding Systems: Analysis, Modeling, and Experimental Validation 铁磁钢外壳对磁屏蔽系统的影响：分析、建模和实验验证

Machines Pub Date : 2024-05-05 DOI: 10.3390/machines12050317

Yuan Cheng, Jiang Huang, Yaozhi Luo, Feng Lu

引用次数: 0

Influence of Tool Inclination and Effective Cutting Speed on Roughness Parameters of Machined Shaped Surfaces 刀具倾角和有效切削速度对加工异形表面粗糙度参数的影响

Machines Pub Date : 2024-05-05 DOI: 10.3390/machines12050318

Ján Varga, M. Demko, Ľ. Kaščák, Peter Ižol, M. Vrabeľ, Jozef Brindza

{"title":"Influence of Tool Inclination and Effective Cutting Speed on Roughness Parameters of Machined Shaped Surfaces","authors":"Ján Varga, M. Demko, Ľ. Kaščák, Peter Ižol, M. Vrabeľ, Jozef Brindza","doi":"10.3390/machines12050318","DOIUrl":"https://doi.org/10.3390/machines12050318","url":null,"abstract":"Free-form surfaces in the automotive or aviation industry where the future shape of the product will contain complex surfaces raises the question of how to achieve the necessary shape of the required quality in the milling process. One of the methods of their production is the use of 5-axis milling, in which it is necessary to consider not only the input data of the process itself, but also the methodology for evaluating the desired results. Correctly answered questions can thus facilitate the choice of the inclination of the tool when machining parts of the surfaces defined in the experiment. The primary goal of the paper was to monitor the influence of tool inclination on the quality of the machined surface and effective cutting speed by evaluating surface roughness and surface topography. The experiment was designed to show the effect of different tool positions while the feed per tooth fz for the finishing operation remained constant. The best result in terms of surface quality was achieved with a tool inclination of 15° in the cutting process. The most unfavorable result was obtained with a tool axis inclination of zero degrees due to unfavorable cutting conditions.","PeriodicalId":509264,"journal":{"name":"Machines","volume":"340 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141011966","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

Study on the Parameter Influences of Gear Tooth Profile Modification and Transmission Error Analysis 齿轮齿形修正的参数影响研究及传动误差分析

Machines Pub Date : 2024-05-04 DOI: 10.3390/machines12050316

Di Zhou, Yonglin Guo, Jian Yang, Yimin Zhang

引用次数: 0

Resonant Fatigue Tests on Polished Drill Pipe Specimens 抛光钻杆试样的共振疲劳试验

Machines Pub Date : 2024-05-03 DOI: 10.3390/machines12050314

C. Santus, L. Romanelli, Leonardo Bertini, A. Burchianti, Tomoya Inoue

引用次数: 0