Advances in Science and Technology Research Journal最新文献

New Approach to Planning the Complex Movements of 6-DOF Industrial Robot Subjected to Acceleration Constraints 规划受加速度约束的 6-DOF 工业机器人复杂运动的新方法

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186361

Grzegorz Pająk

{"title":"New Approach to Planning the Complex Movements of 6-DOF Industrial Robot Subjected to Acceleration Constraints","authors":"Grzegorz Pająk","doi":"10.12913/22998624/186361","DOIUrl":"https://doi.org/10.12913/22998624/186361","url":null,"abstract":"A method of trajectory planning with regards to joint velocity and acceleration constraints for industrial 6DOF manipulator is presented. The task of the robot is to move to specified location in the workspace passing through intermediate waypoints. The proposed algorithm can be used to plan the task of the robot by autonomous systems in smart factories eliminating human participation in the robot programing process. Opposite to similar approaches it does not assume the type of function describing the motion of the robot. The trajectories generated using the proposed approach are smooth and provide smooth velocities and continuous joint accelerations. The motion is planned in such a way to fulfill joint velocity and acceleration constraints. Fulfillment of velocity limitations is accomplished by perturbing the manipulator motion close to velocity limits. To satisfy acceleration constraints a trajectory scaling approach carried out in limited periods of time is used. The results of the research are illustrated by simulations and experiments, in which an analysis of the method of performing robot tasks carried out using built-in algorithms and presented methods are performed.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"60 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231295","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

Applying the Machine Learning Method to Improve Calibration Quality of TDR Measuring Technique 应用机器学习方法提高 TDR 测量技术的校准质量

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/187007

Dominika Mikušová, Zbigniew Suchorab, Magdalena Paśnikowska-Łukaszuk, Jacek Zaburko, Anton Trnik

引用次数: 0

Effect of the Electrode Extension on the Geometry of Parts Made of 316LSi Steel by Wire Arc Additive Manufacturing Method (WAAM) 电极延伸对线弧快速成型法（WAAM）制造的 316LSi 钢零件几何形状的影响

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186362

Przemysław Połaski, D. Golański, P. Kołodziejczak, Anna Pakuła

{"title":"Effect of the Electrode Extension on the Geometry of Parts Made of 316LSi Steel by \u0000Wire Arc Additive Manufacturing Method (WAAM)","authors":"Przemysław Połaski, D. Golański, P. Kołodziejczak, Anna Pakuła","doi":"10.12913/22998624/186362","DOIUrl":"https://doi.org/10.12913/22998624/186362","url":null,"abstract":"Intensive research is currently being conducted on wire arc additive manufacturing (WAAM) processes. Previous studies have demonstrated the impact of current parameters on altering the structure and properties of 316L stain - less steel. However, there is a lack of comprehensive information in the literature regarding the influence of elec - trode extension length (contact to tube distance) on changes in the structure and geometry of parts made of 316L steel using the cold metal transfer (CMT) method. This parameter was often assumed to be constant in research experiments. The study aimed to determine how the length of the electrode extension affects the geometric prop - erties of steel walls produced in the WAAM CMT additive manufacturing process. The experiment used 316LSi stainless steel to build 3D structures in the shape of straight walls. The chosen shape of the parts yielded the most benefits for preparing samples from the resulting structures for destructive testing. The research demonstrated that the length of the electrode extension is a crucial parameter in the additive manufacturing process of structures using the WAAM method. Modifying the electrode extension length in the WAAM process with a CMT machine impacts the bead geometry and, consequently, the overall model geometry. A 6 mm increase in the electrode exten - sion length resulted in a model that was over 8 mm taller, despite using the same number of layers.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"8 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141228969","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

Design and Optimization of Casting System for Integrated Longitudinal Beam and Tower Package Based on Al-Si Alloy 基于铝硅合金的一体化纵梁和塔架浇铸系统的设计与优化

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186012

Li Heng, Wang Nan, Xingyu Teng, Chai Zhen, Xiaoyong Zhu, Yucheng Wu

引用次数: 0

Temperature Effect on Buckling Properties of Thin-Walled Composite Profile Subjected to Axial Compression 温度对轴向压缩薄壁复合材料型材屈曲特性的影响

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186607

K. Falkowicz, Michał Kuciej, Łukasz Świech

{"title":"Temperature Effect on Buckling Properties of Thin-Walled Composite Profile Subjected to Axial Compression","authors":"K. Falkowicz, Michał Kuciej, Łukasz Świech","doi":"10.12913/22998624/186607","DOIUrl":"https://doi.org/10.12913/22998624/186607","url":null,"abstract":"This study investigates the influence of temperature variations on the buckling properties of thin-walled omega-pro - files fabricated from carbon-epoxy composite materials. Utilizing a MTS testing machine, compression tests were conducted on these profiles at temperatures ranging from -20°C to 80°C, in 20°C increments. The primary objective was to assess how temperature fluctuations impact the buckling load and load-bearing capacity of these composite profiles under axial compression. The experimental setup allowed for precise measurement of load-displacement and load-deflection characteristics, and the critical load at which buckling initiation occurred. Observations revealed that the buckling resistance of the profiles exhibited a complex dependence on temperature. At lower temperatures, the composite material demonstrated enhanced stiffness and strength, marginally increasing buckling resistance. Conversely, at elevated temperatures, a noticeable degradation in mechanical properties was observed, leading to a reduced buckling load and altered failure modes. To complement the experimental findings, a comprehensive finite element (FE) analysis was conducted for sample in room temperature. The FE model, developed to replicate the experimental conditions closely, employed an eigenvalue-based approach to predict the buckling initiation and progression accurately. The presented results are the results of only preliminary tests and they will be expand about more samples number as well as to determine material properties for various temperatures.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"99 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141234441","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

The Process of Bending Pipes for Components of Aircraft Frames And Trusses 飞机框架和桁架部件的弯管工艺

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186745

P. Bałon, E. Rejman, B. Kiełbasa, R. Smusz, Grzegorz Szeliga

{"title":"The Process of Bending Pipes for Components of Aircraft Frames And Trusses","authors":"P. Bałon, E. Rejman, B. Kiełbasa, R. Smusz, Grzegorz Szeliga","doi":"10.12913/22998624/186745","DOIUrl":"https://doi.org/10.12913/22998624/186745","url":null,"abstract":"Demand for bent pipe profiles in various industrial sectors is increasing due to considerations necessitating light - weight construction, safety, as well as space and cost savings. Lightweight construction is becoming increasingly important for economic and ecological reasons. This can be seen in the automotive and aerospace industries, as well as in civil engineering, where curved structures are often required. In order to reduce the weight of the aircraft, the aviation industry often uses spatial truss structures with bent elements. The challenge is to meet all of the stringent requirements regarding design, safety, structure, size, cost, etc., without compromising a structure’s stiffness. Profiles with complicated cross-sections and so-called tailored tubes are increasingly used in the production of automotive and aircraft structures (General Aviation). Pipe and profile bending technologies are constantly being improved upon to meet the growing expectations of customers and ensure greater process efficiency. Currently, efforts are being made to increase the level of automation in this area by combining the functionality of modern bending machines with the capabilities of industrial robots. CNC bending machines currently dominate the industrial pipe bending process. A technologically advanced bending machine allows for the production of increasingly complex shapes and profiles.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"33 49","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233140","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

Stability of Thin-Walled Composite Structures with Closed Sections Under Compression 具有封闭截面的薄壁复合结构在压缩条件下的稳定性

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186473

Kuba Rosłaniec, P. Różyło

{"title":"Stability of Thin-Walled Composite Structures with Closed Sections Under Compression","authors":"Kuba Rosłaniec, P. Różyło","doi":"10.12913/22998624/186473","DOIUrl":"https://doi.org/10.12913/22998624/186473","url":null,"abstract":"The purpose of the research was to analyze the experimental-numerical influence of the type of cross-section on the stability of thin-walled composite columns with closed (rectangular) cross-sections. The subject of the investigation was thin-walled composite structures made of CFRP composite (carbon fiber reinforced polymer), characterized by a closed rectangular cross-section shape of the profile and a identical ply configuration. In this study, experimental and numerical investigations of axially compressed columns were performed to determine the values of buckling loads and buckling forms. Experimental investigations were performed using a universal testing machine with an optical deformation measurement system. In parallel with the experimental tests, numerical simulations were made using the Finite Element Method (FEM). The numerical studies conducted using dedicated numerical models and the experimental studies made it possible to carry out a thorough analysis of the impact of the cross-sectional shape on the buckling phenomenon of the structure. The novelty of the present paper is the use of interdisciplinary testing methods to compare the effect of cross-sectional geometry on the stability of thin-walled composite columns.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"79 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231031","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

Effect of Trenched Hemispherical Pin Fins on Cooling Performance of Heat Sink 沟槽式半球形销鳍对散热器冷却性能的影响

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/185505

A. Yousfi, Lahcene Bellahcene, Faris Alqurashi, Djamel Sahel, Mohamed Teggar, Abdelghani Laouer, Müslüm Arıcı, M. Kchaou

{"title":"Effect of Trenched Hemispherical Pin Fins on Cooling Performance of Heat Sink","authors":"A. Yousfi, Lahcene Bellahcene, Faris Alqurashi, Djamel Sahel, Mohamed Teggar, Abdelghani Laouer, Müslüm Arıcı, M. Kchaou","doi":"10.12913/22998624/185505","DOIUrl":"https://doi.org/10.12913/22998624/185505","url":null,"abstract":"Pin fins have the potential to improve the thermal performance of various engineering devices. Modified pin fins could further increase their thermal performance in a passive way at lower cost. This study is aimed at numerically investigating the thermal performance of trenched hemispherical pin fins heat sink (THPFHS) and the influence of parameters including the trench number (N = 1, 3 and 5) and thickness (e = 1 to 5 mm). The simulations were performed using a computational fluid dynamics (CFD) software considering turbulent air flow conditions. Results showed that the use of aluminum fins fitted with one trench in the middle of the hemispherical pin fin considerably increased the local heat transfer. Furthermore, all studied configurations show high thermal performance factor (HTPF) compared with the conventional cylindrical pin fins heat sink (CPFHS). For this new configuration (THPFHS), Nu increases by 45% while the thermal resistance reduces by 42%, compared to the baseline case. On the other hand, this improved performance results in 50% pressure drop penalty. Moreover, the obtained results showed a significant improvement in the performance mainly at high Re.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"46 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141232623","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 of the Influence of Cavitation and Magnetic Field on the Change of Water Properties and its Purification in a Vibrating Machine with Determination of Drive Modes 研究气蚀和磁场对振动机中水性质变化及其净化的影响并确定驱动模式

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/186545

Anatolyi Hordieiev, Galyna Kalda, M. Pashechko, Andriy Hanzyuk, Vitaliy Tkachuk, Nazar Kostiuk

{"title":"Study of the Influence of Cavitation and Magnetic Field on the Change of Water Properties and its Purification in a Vibrating Machine with Determination of Drive Modes","authors":"Anatolyi Hordieiev, Galyna Kalda, M. Pashechko, Andriy Hanzyuk, Vitaliy Tkachuk, Nazar Kostiuk","doi":"10.12913/22998624/186545","DOIUrl":"https://doi.org/10.12913/22998624/186545","url":null,"abstract":"The paper presents the results of research into the influence of low-frequency sound and magnetic fields on the change in the properties of water and its purification in a vibrating machine with an eccentric drive, which allows obtaining a constant amplitude of oscillation when the frequency of oscillations of the drive is changed. A method and construc - tion of a vibrating machine for changing the properties of water and cleaning is proposed. Thanks to its reciprocating movement, and in the pulsation chamber and the nozzle, appropriate reactions take place. At certain oscillation fre - quencies, a cavitation cavity appears in the nozzle and the pulsation chamber, in which the process of splitting water molecules into active radicals takes place. At the same time, during the reciprocating movement of water through a non-magnetic nozzle, which is covered by permanent magnets, an additional effect of a variable magnetic field direc - tion is exerted on water, which strengthens the breaking of hydrogen bonds in water molecules. Visualization of the hydrocavitation process during operation of a vibrating machine with a transparent nozzle was studied. During the experiment, changes in water parameters were studied, i.e. changes in pH, changes in the oxidation-reduction poten - tial of treatment ORP and the total content of mineralization according to the TDS index with treatment time. The total concentration of dissolved salts decreases from 400 to 300 units, which also indicates an improvement in water quality. The rational frequency limits of the vibration drive of the machine are in the range from 18 to 23 Hz with an amplitude of oscillations of 0.002 m, and the ratio of its design parameters is determined: with a piston diameter of 0.1 m, it is recommended to use a diameter of the hole in the piston from 0.006 to 0.008 m.","PeriodicalId":517116,"journal":{"name":"Advances in Science and Technology Research Journal","volume":"9 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233592","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

Screw Extrusion as a Scalable Technology for Manufacturing Carbon Nanotube-Filled Polylactide Composites 螺杆挤压是一种制造碳纳米管填充聚乳酸复合材料的可扩展技术

Advances in Science and Technology Research Journal Pub Date : 2024-06-01 DOI: 10.12913/22998624/185961

D. Kaczor, Krzysztof Bajer, A. Raszkowska-Kaczor, G. Domek, P. Szroeder

引用次数: 0