Pub Date : 2020-11-17DOI: 10.36526/v-mac.v5i2.1042
Prasetyo Adri Pamungkas, Muhammad Agus Sahbana, N. Finahari
Biomechanics is the study of internal and external forces acting on the body of living things and the effects of these forces. The study of the motion of living things is carried out by applying theories and laws of motion. The forces acting on the human body organ systems in biomechanics include gravitational force, body reaction force and muscle force. These forces can be measured using a dynamometer. This study aims to design a load cell sensor-based dynamometer which is used as a mass sensor, applied to the design, then analyzed its accuracy for the study of the biomechanics of Bapang dancers. The design is based on the availability of research funds but refers to the Mettler Toledo weighing principle, where the floor scale is designed as a measuring base for the dancers to perform their dances. The area of this measuring base is predefined as 1.25 x 1.25 m. This has reduced the accuracy of the design results considering the ideal area for free dancing is 3 x 3 m. The design results have worked well and can record changes in the load during changes in dancer movements. The measured reading accuracy value reaches 98.36% but still includes measurement errors due to differences in the place and time of the calibration measurement, and differences in the clothes of the people who are the object of the load. The load reading display captures an average time delay of 0.468 seconds. It is recommended that the drawbacks of this design be corrected by designing a dancer's load measurement system using a load sensor that is shaped like a ballet shoe, but uses a wireless data transfer system so that the dancers can move freely. In addition, the shoe-shaped dynamometer design can definitively separate the load readings for the right and left feet.
生物力学是研究作用在生物体内的内力和外力以及这些力的影响的学科。对生物运动的研究是运用运动的理论和规律进行的。在生物力学中作用于人体器官系统的力包括重力、身体反作用力和肌肉力。这些力可以用测功机测量。本研究旨在设计一种基于称重传感器的测力仪作为质量传感器，应用于设计中，并对其精度进行分析，用于巴板舞者的生物力学研究。该设计基于研究资金的可用性，但参考了梅特勒-托莱多称重原理，其中地板秤被设计为舞者表演舞蹈的测量基础。该测量底座的面积预定义为1.25 x 1.25 m。考虑到自由舞蹈的理想区域是3 × 3米，这降低了设计结果的准确性。设计结果运行良好，可以记录舞者动作变化时负荷的变化。测量的读数精度值达到98.36%，但仍存在由于校准测量的地点和时间的差异以及作为负载对象的人员的服装差异而产生的测量误差。负载读数显示捕获0.468秒的平均时间延迟。建议通过设计舞者的负载测量系统来纠正这种设计的缺点，该系统使用形状像芭蕾舞鞋的负载传感器，但使用无线数据传输系统，使舞者可以自由移动。此外，鞋形测功机的设计可以明确地分离右脚和左脚的负载读数。
{"title":"Rancang Bangun dan Analisis Akurasi Dinamometer Untuk Kajian Biomekanika Gaya Penari Bapang","authors":"Prasetyo Adri Pamungkas, Muhammad Agus Sahbana, N. Finahari","doi":"10.36526/v-mac.v5i2.1042","DOIUrl":"https://doi.org/10.36526/v-mac.v5i2.1042","url":null,"abstract":"Biomechanics is the study of internal and external forces acting on the body of living things and the effects of these forces. The study of the motion of living things is carried out by applying theories and laws of motion. The forces acting on the human body organ systems in biomechanics include gravitational force, body reaction force and muscle force. These forces can be measured using a dynamometer. This study aims to design a load cell sensor-based dynamometer which is used as a mass sensor, applied to the design, then analyzed its accuracy for the study of the biomechanics of Bapang dancers. The design is based on the availability of research funds but refers to the Mettler Toledo weighing principle, where the floor scale is designed as a measuring base for the dancers to perform their dances. The area of this measuring base is predefined as 1.25 x 1.25 m. This has reduced the accuracy of the design results considering the ideal area for free dancing is 3 x 3 m. The design results have worked well and can record changes in the load during changes in dancer movements. The measured reading accuracy value reaches 98.36% but still includes measurement errors due to differences in the place and time of the calibration measurement, and differences in the clothes of the people who are the object of the load. The load reading display captures an average time delay of 0.468 seconds. It is recommended that the drawbacks of this design be corrected by designing a dancer's load measurement system using a load sensor that is shaped like a ballet shoe, but uses a wireless data transfer system so that the dancers can move freely. In addition, the shoe-shaped dynamometer design can definitively separate the load readings for the right and left feet.","PeriodicalId":148301,"journal":{"name":"V-MAC (Virtual of Mechanical Engineering Article)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125281843","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}
Pub Date : 2020-11-17DOI: 10.36526/v-mac.v5i2.1038
Ahmad Lazim Rosyid, I. Qiram, Dewi Sartika
The helical Savonius is a vertical wind turbine that can utilize wind energy to become a renewable energy source. This study aims to determine the effect of the number of blades and the ratio of blade bends on the performance of the Savonius helical wind turbine. The research was conducted through experimentation using variations in the number of blades 2 and 3 blades. Variation of blade bending ratio H / L = 6/10, 7/10 and 8/10 and variations in wind speed (4.0), (5.2), (6.4) and (7.4) m / s. The turbine performance analysis is reviewed based on the shaft rotation (RPM) of the turbine and the output voltage (volts) generated by the generator connected to the turbine shaft. The results showed that the wind speed, the number of blades, and the blending ratio of the blades affect the performance of the Savonius helical wind turbine. The results of the maximum wind turbine performance test at a variation of 3 blades, a ratio of 6/10, and a wind speed of 7.4 m / s, produce a shaft rotation value of 472.9 rpm and a generator output voltage value of 5.51 volts. Keywords: Helical Savonius, number and ratio blade bend, wind speed, performance
螺旋Savonius是一种垂直风力涡轮机，可以利用风能成为可再生能源。本研究旨在确定叶片数和叶片弯曲比对Savonius螺旋风力机性能的影响。研究是通过使用叶片2和叶片3数量的变化进行的实验。叶片弯曲比H / L = 6/ 10,7 /10和8/10的变化以及风速(4.0)，(5.2)，(6.4)和(7.4)m / s的变化。根据涡轮机的轴转速(RPM)和连接到涡轮轴上的发电机产生的输出电压(伏)，对涡轮机进行性能分析。结果表明，风速、叶片数量和叶片混合比例对Savonius螺旋风力机的性能有影响。在3片叶片变化、6/10比、风速7.4 m / s条件下，风力机最大性能试验结果为轴转速472.9 rpm，发电机输出电压5.51伏。关键词:螺旋叶片;叶片弯曲数与比;风速
{"title":"Pengaruh Jumlah dan Rasio Sudut Lengkung Sudu Terhadap Unjuk Kerja Turbin Angin Savonius Heliks","authors":"Ahmad Lazim Rosyid, I. Qiram, Dewi Sartika","doi":"10.36526/v-mac.v5i2.1038","DOIUrl":"https://doi.org/10.36526/v-mac.v5i2.1038","url":null,"abstract":"The helical Savonius is a vertical wind turbine that can utilize wind energy to become a renewable energy source. This study aims to determine the effect of the number of blades and the ratio of blade bends on the performance of the Savonius helical wind turbine. The research was conducted through experimentation using variations in the number of blades 2 and 3 blades. Variation of blade bending ratio H / L = 6/10, 7/10 and 8/10 and variations in wind speed (4.0), (5.2), (6.4) and (7.4) m / s. The turbine performance analysis is reviewed based on the shaft rotation (RPM) of the turbine and the output voltage (volts) generated by the generator connected to the turbine shaft. The results showed that the wind speed, the number of blades, and the blending ratio of the blades affect the performance of the Savonius helical wind turbine. The results of the maximum wind turbine performance test at a variation of 3 blades, a ratio of 6/10, and a wind speed of 7.4 m / s, produce a shaft rotation value of 472.9 rpm and a generator output voltage value of 5.51 volts. \u0000Keywords: Helical Savonius, number and ratio blade bend, wind speed, performance","PeriodicalId":148301,"journal":{"name":"V-MAC (Virtual of Mechanical Engineering Article)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129892430","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}
Pub Date : 2020-10-30DOI: 10.36526/v-mac.v5i2.1068
Dimas Adi Perwira, Henry Widya Prasetya
Most of the railway facilities use steel as the constituent material. The method of joining (joining methods) of steel materials, especially in the railroad industry, the most widely used is the welding technique (welding) so that knowledge of the welding process is very important for welding enginers and metallurgists as well as for designers, fabricators, users of welding results. The purpose of this study was to determine the tensile strength of the joint resulting from the friction welding method with variations in the shape of the forging surface and preheat temperature. The shape of the forging surface is 8 mm, 10 mm and 12 mm. Variations in preheat temperature of 200 C, 400 C and 600 C. The results showed the highest tensile strength of the friction weld joint with an average tensile stress value of 407, 48 MPa on the forging surface shape of 12 mm and a preheat temperature of 600 C. And the tensile strength of the joint The lowest friction welding with an average tensile stress value of 120 MPa on the forging surface shape of 8 mm and a preheat temperature of 200 C. Keyword: friction welding, forgings, preheat temperature
{"title":"Pengaruh Variasi Bentuk Permukaan Forging Dan Suhu Preheat Terhadap Kekuatan Tarik Friction Welding","authors":"Dimas Adi Perwira, Henry Widya Prasetya","doi":"10.36526/v-mac.v5i2.1068","DOIUrl":"https://doi.org/10.36526/v-mac.v5i2.1068","url":null,"abstract":"Most of the railway facilities use steel as the constituent material. The method of joining (joining methods) of steel materials, especially in the railroad industry, the most widely used is the welding technique (welding) so that knowledge of the welding process is very important for welding enginers and metallurgists as well as for designers, fabricators, users of welding results. The purpose of this study was to determine the tensile strength of the joint resulting from the friction welding method with variations in the shape of the forging surface and preheat temperature. The shape of the forging surface is 8 mm, 10 mm and 12 mm. Variations in preheat temperature of 200 C, 400 C and 600 C. The results showed the highest tensile strength of the friction weld joint with an average tensile stress value of 407, 48 MPa on the forging surface shape of 12 mm and a preheat temperature of 600 C. And the tensile strength of the joint The lowest friction welding with an average tensile stress value of 120 MPa on the forging surface shape of 8 mm and a preheat temperature of 200 C. \u0000Keyword: friction welding, forgings, preheat temperature","PeriodicalId":148301,"journal":{"name":"V-MAC (Virtual of Mechanical Engineering Article)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124498300","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}
Pub Date : 2020-10-21DOI: 10.36526/v-mac.v5i2.1065
Eko Setyo Adi Santoso, I. Qiram, Anas Mukhtar
Jig is a fishing rod that is usually used to catch squid or cuttlefish in the form of fish, shrimp, or others. This study aims to determine the effect of differences in the shape of the surface of the jig on the flow pattern of freshwater fluids. The study used a variation of 3 jig surface shapes with the same length, namely 7 cm, 1 cm wide. The angle of inclination of the jig includes 15⁰ and 30⁰. The type of flow is laminar conditioned using a volume flow rate of 76.60 liters per second. The jig is conditioned to move up and down using an electric motor. The flow patterns formed were analyzed using visual tests and measurements using Kinovea 0.8.15. The results showed that the shape of the surface of the jig had an effect on the fluid flow pattern. The highest wave occurs at jigs 3 with 15⁰ variation with a wave crest of 4.55 cm, while for jigs 1, 30⁰ variation produces the lowest wave of 1.51 cm. Keywords : Jigs, shape jigs, angle jigs, flow patterns, waves
{"title":"Pengaruh Bentuk Umpan Pancing Buatan (Jigs) Terhadap Pola Aliran Fluida","authors":"Eko Setyo Adi Santoso, I. Qiram, Anas Mukhtar","doi":"10.36526/v-mac.v5i2.1065","DOIUrl":"https://doi.org/10.36526/v-mac.v5i2.1065","url":null,"abstract":"Jig is a fishing rod that is usually used to catch squid or cuttlefish in the form of fish, shrimp, or others. This study aims to determine the effect of differences in the shape of the surface of the jig on the flow pattern of freshwater fluids. The study used a variation of 3 jig surface shapes with the same length, namely 7 cm, 1 cm wide. The angle of inclination of the jig includes 15⁰ and 30⁰. The type of flow is laminar conditioned using a volume flow rate of 76.60 liters per second. The jig is conditioned to move up and down using an electric motor. The flow patterns formed were analyzed using visual tests and measurements using Kinovea 0.8.15. The results showed that the shape of the surface of the jig had an effect on the fluid flow pattern. The highest wave occurs at jigs 3 with 15⁰ variation with a wave crest of 4.55 cm, while for jigs 1, 30⁰ variation produces the lowest wave of 1.51 cm. \u0000 Keywords : Jigs, shape jigs, angle jigs, flow patterns, waves","PeriodicalId":148301,"journal":{"name":"V-MAC (Virtual of Mechanical Engineering Article)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126430967","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}
Pub Date : 2020-10-19DOI: 10.36526/v-mac.v5i2.1054
Henry Widya Prasetya, Hari Boedi Wahjono
In the manufacturing industry, the cutting process, especially lathes, has developed rapidly, one of which is in the rail transportation industry sector. The purpose of this study was to determine the effect of cutting parameters and the nose radius of the W-style insert tool on the level of surface roughness in the turning process of S45C steel. This research uses experimental research methods. In this study, using a variation of cutting parameters and nose radius. Variations in cutting parameters using cutting speeds of 195 Rpm, 300 Rpm and 440 Rpm. Variation of the depth of cut 1 mm and 2 mm. Variation of feed speed 0.1 mm / rev, 0.2 mm / rev and 0.3 mm / rev. While the variation of the nose tool radius for inserting W-style is 0.4 mm and 0.8 mm. After turning the surface roughness test was carried out using the Surface Roughness Tester. The results of this study indicate that the increasing cutting speed and nose radius of the insert tool, decreasing feeding velocity and cutting depth results in good surface quality. Keyword: W-series insert tool, nose radius, surface roughness.
在制造业中，切削加工，特别是车床，发展迅速，其中之一就是在轨道交通行业部门。本研究的目的是确定切削参数和w型插刀刀头半径对S45C钢车削过程中表面粗糙度水平的影响。本研究采用实验研究方法。在本研究中，采用了不同的切割参数和鼻半径。切削参数的变化使用195rpm, 300rpm和440rpm的切削速度。切割深度变化1毫米和2毫米。进给速度变化为0.1 mm / rev、0.2 mm / rev和0.3 mm / rev，而插入w型的刀头半径变化为0.4 mm和0.8 mm。车削后，使用表面粗糙度测试仪进行表面粗糙度测试。研究结果表明，增大切削速度和刀尖半径，减小进给速度和切削深度可获得较好的表面质量。关键词:w系列刀具，刀头半径，表面粗糙度。
{"title":"Pengaruh Parameter Pemotongan Dan Nose Radius Pahat Insert W-Style Pada Pembubutan Baja S45c","authors":"Henry Widya Prasetya, Hari Boedi Wahjono","doi":"10.36526/v-mac.v5i2.1054","DOIUrl":"https://doi.org/10.36526/v-mac.v5i2.1054","url":null,"abstract":"In the manufacturing industry, the cutting process, especially lathes, has developed rapidly, one of which is in the rail transportation industry sector. The purpose of this study was to determine the effect of cutting parameters and the nose radius of the W-style insert tool on the level of surface roughness in the turning process of S45C steel. This research uses experimental research methods. In this study, using a variation of cutting parameters and nose radius. Variations in cutting parameters using cutting speeds of 195 Rpm, 300 Rpm and 440 Rpm. Variation of the depth of cut 1 mm and 2 mm. Variation of feed speed 0.1 mm / rev, 0.2 mm / rev and 0.3 mm / rev. While the variation of the nose tool radius for inserting W-style is 0.4 mm and 0.8 mm. After turning the surface roughness test was carried out using the Surface Roughness Tester. The results of this study indicate that the increasing cutting speed and nose radius of the insert tool, decreasing feeding velocity and cutting depth results in good surface quality. \u0000 \u0000Keyword: W-series insert tool, nose radius, surface roughness.","PeriodicalId":148301,"journal":{"name":"V-MAC (Virtual of Mechanical Engineering Article)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116325625","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}
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