Pub Date : 2023-01-01DOI: 10.18178/ijmerr.12.3.184-191
A. Adeodu, R. Maladzhi, M. G. K. Katumba
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{"title":"Evaluation of Intelligent Solar Based Hand Gesture Controlled Lawn Robot","authors":"A. Adeodu, R. Maladzhi, M. G. K. Katumba","doi":"10.18178/ijmerr.12.3.184-191","DOIUrl":"https://doi.org/10.18178/ijmerr.12.3.184-191","url":null,"abstract":".","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67498042","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}
—This study aimed to evaluate the external fixation for femoral bone fracture by possibly using the 10-hole locking compression plates (LCPs). A comparison of LCPs, including 10-hole board LCP and 10-hole narrow LCP, was analyzed under femoral bone cutting at a 1 mm increment. The maximum load on 800 N, then, the structure was analyzed for dual LCP by making the implant model on the side lateral-anterior. The result of the study demonstrated that both board LCP and narrow LCP had the maximum stiffness above the maximum stress of the structure and greater than the ultimate tensile stress of 304-stainless steel. Recheck a board LCP model that was unable by torsion load on 12 Nm. Thus, increasing a board LCP on the side anterior of the femur, or dual LCP, was appropriated to treat femoral bone fracture as the external fixation because dual LCP can be the overall load.
{"title":"Possibility of Locking Compression Plate as the Treatment of External Fixation for Femoral Bone Based on Finite Element Method","authors":"Kriengkrai Nabudda, Jarupol Suriyawanakul, Kiatfa Tangchaichit, Weerachai Kosuwon, Kamolsak Sukhonthamarn, Nattadon Pannucharoenwong","doi":"10.18178/ijmerr.12.5.290-296","DOIUrl":"https://doi.org/10.18178/ijmerr.12.5.290-296","url":null,"abstract":"—This study aimed to evaluate the external fixation for femoral bone fracture by possibly using the 10-hole locking compression plates (LCPs). A comparison of LCPs, including 10-hole board LCP and 10-hole narrow LCP, was analyzed under femoral bone cutting at a 1 mm increment. The maximum load on 800 N, then, the structure was analyzed for dual LCP by making the implant model on the side lateral-anterior. The result of the study demonstrated that both board LCP and narrow LCP had the maximum stiffness above the maximum stress of the structure and greater than the ultimate tensile stress of 304-stainless steel. Recheck a board LCP model that was unable by torsion load on 12 Nm. Thus, increasing a board LCP on the side anterior of the femur, or dual LCP, was appropriated to treat femoral bone fracture as the external fixation because dual LCP can be the overall load.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136207984","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 : 2023-01-01DOI: 10.18178/ijmerr.12.5.264-274
Sergio A. Pertuz, Cesar A. Peña, Cristhian I. Riaño
—This paper presents the design and construction of a multi-finger biometric robotic hand prototype that can be used as an end effector in processes that require dexterous grasping of objects. The research aims to obtain an optimized mechanism that manages to emulate the movements of a hand using a reduced number of joints and links. A rigid mechanism with actuators in the palm is mathematically modeled and kinematically verified through a functional grip application. A biologically inspired optimization algorithm is employed in the dimensional optimization of the mechanism to follow a trajectory profile that defines the type of grip. As a result, a robotic hand is obtained with a proportion that does not exceed 10% of the dimensions of a human hand, which integrates a mechanism with 7 Degrees of freedom (DOF) and 16 joints and a trajectory control that guarantees different types of grip. Different grips presented in this document show the dexterity of the hand, given by the kind of rigid mechanism and trajectory profile tracking. The adduction and abduction movements of the hand extend their usefulness to reproduce different types of grips.
{"title":"Design and Building of a Multi-finger Robotic Hand Prototype for Grip Control","authors":"Sergio A. Pertuz, Cesar A. Peña, Cristhian I. Riaño","doi":"10.18178/ijmerr.12.5.264-274","DOIUrl":"https://doi.org/10.18178/ijmerr.12.5.264-274","url":null,"abstract":"—This paper presents the design and construction of a multi-finger biometric robotic hand prototype that can be used as an end effector in processes that require dexterous grasping of objects. The research aims to obtain an optimized mechanism that manages to emulate the movements of a hand using a reduced number of joints and links. A rigid mechanism with actuators in the palm is mathematically modeled and kinematically verified through a functional grip application. A biologically inspired optimization algorithm is employed in the dimensional optimization of the mechanism to follow a trajectory profile that defines the type of grip. As a result, a robotic hand is obtained with a proportion that does not exceed 10% of the dimensions of a human hand, which integrates a mechanism with 7 Degrees of freedom (DOF) and 16 joints and a trajectory control that guarantees different types of grip. Different grips presented in this document show the dexterity of the hand, given by the kind of rigid mechanism and trajectory profile tracking. The adduction and abduction movements of the hand extend their usefulness to reproduce different types of grips.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136208447","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 : 2023-01-01DOI: 10.18178/ijmerr.12.6.362-377
Grover Zurita Villarroel, Ruben Vasquez Martinez, Juan Rene Clavijo Grandon, Sebastian Paniagua Gutiérrez
—Our research aims to develop an efficient framework for machine design in response to the growing industry demand for optimization. We utilize Design Thinking (DT) combined with Shigley’s Methodology (SM) to address ill-defined problems and promote human-centric problem-solving. SM’s iterative process consisting of six phases facilitates effective planning and innovation. We conducted a case study focusing on the design and analysis of a buggy-type vehicle with specific dimensions. Various analyses, including static, fatigue, structure resonance, thermal, aerodynamic, and impact analysis, were performed using MATLAB and Solid-work’s software. The structural analysis indicated values below the yielding stress, with a safety factor of approximately 3. The aerodynamic and impact studies were crucial in understanding the effects of airflow and assessing the structure’s resistance to impacts at different speeds. The obtained results validated the design in terms of safety coefficient, structure resonance, heat dissipation, impact resistance, and aerodynamic performance. Additionally, the cost of the designed prototype was found to be 48% lower compared to a similar model.
{"title":"A Systematic Procedure for Design and Structural Mechanical Analysis: A Case Study for Construction of a Buggy","authors":"Grover Zurita Villarroel, Ruben Vasquez Martinez, Juan Rene Clavijo Grandon, Sebastian Paniagua Gutiérrez","doi":"10.18178/ijmerr.12.6.362-377","DOIUrl":"https://doi.org/10.18178/ijmerr.12.6.362-377","url":null,"abstract":"—Our research aims to develop an efficient framework for machine design in response to the growing industry demand for optimization. We utilize Design Thinking (DT) combined with Shigley’s Methodology (SM) to address ill-defined problems and promote human-centric problem-solving. SM’s iterative process consisting of six phases facilitates effective planning and innovation. We conducted a case study focusing on the design and analysis of a buggy-type vehicle with specific dimensions. Various analyses, including static, fatigue, structure resonance, thermal, aerodynamic, and impact analysis, were performed using MATLAB and Solid-work’s software. The structural analysis indicated values below the yielding stress, with a safety factor of approximately 3. The aerodynamic and impact studies were crucial in understanding the effects of airflow and assessing the structure’s resistance to impacts at different speeds. The obtained results validated the design in terms of safety coefficient, structure resonance, heat dissipation, impact resistance, and aerodynamic performance. Additionally, the cost of the designed prototype was found to be 48% lower compared to a similar model.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134888212","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 : 2023-01-01DOI: 10.18178/ijmerr.12.1.16-22
Vũ Ngọc Kiên, Nguyễn Tiến Duy, Daojia Du, Nguyen Phuong Huy, N. Quang
—Control of a self-balancing vehicle is a challenging but exciting research topic. The challenge of researching self-balancing bicycles is maintaining balance when the bike is stationary and when the bike is moving. This paper, through analysis and comparison of two-wheeled vehicle balancing methods, shows that the method that best meets the requirements of the two-wheeled vehicle balance control problem is the balancing method using a flywheel stabilizer. Compared with the gyroscopic flywheel stabilizer, the inverted pendulum flywheel stabilizer has the advantages of fast response speed and energy saving, so we choose the pendulum flywheel stabilizer to reverse to control the balance of the two-wheeler. By modeling and analyzing the two-wheel vehicle model, it shows that the vehicle model is subjected to uncertainties. Hence, the robust controller is an appropriate controller for balancing two-wheel vehicles. However, the controller designed according to the robust control algorithm RH ∞ is often high-order, affecting the actual control quality. We proposed using the particle swarm optimization (PSO) algorithm to find a low-order robust controller from the high-order robust controller. By comparing the efficiency of the low-order robust controller according to PSO with the high-order robust controller and other low-order robust controllers, we have proven the correctness of the low-order robust controller according to PSO. Simulation results show that a two-wheel vehicle using a low-order robust controller according to PSO can stabilize the vehicle and give good control quality.
{"title":"Robust Optimal Controller for Two-wheel Self-Balancing Vehicles Using Particle Swarm Optimization","authors":"Vũ Ngọc Kiên, Nguyễn Tiến Duy, Daojia Du, Nguyen Phuong Huy, N. Quang","doi":"10.18178/ijmerr.12.1.16-22","DOIUrl":"https://doi.org/10.18178/ijmerr.12.1.16-22","url":null,"abstract":"—Control of a self-balancing vehicle is a challenging but exciting research topic. The challenge of researching self-balancing bicycles is maintaining balance when the bike is stationary and when the bike is moving. This paper, through analysis and comparison of two-wheeled vehicle balancing methods, shows that the method that best meets the requirements of the two-wheeled vehicle balance control problem is the balancing method using a flywheel stabilizer. Compared with the gyroscopic flywheel stabilizer, the inverted pendulum flywheel stabilizer has the advantages of fast response speed and energy saving, so we choose the pendulum flywheel stabilizer to reverse to control the balance of the two-wheeler. By modeling and analyzing the two-wheel vehicle model, it shows that the vehicle model is subjected to uncertainties. Hence, the robust controller is an appropriate controller for balancing two-wheel vehicles. However, the controller designed according to the robust control algorithm RH ∞ is often high-order, affecting the actual control quality. We proposed using the particle swarm optimization (PSO) algorithm to find a low-order robust controller from the high-order robust controller. By comparing the efficiency of the low-order robust controller according to PSO with the high-order robust controller and other low-order robust controllers, we have proven the correctness of the low-order robust controller according to PSO. Simulation results show that a two-wheel vehicle using a low-order robust controller according to PSO can stabilize the vehicle and give good control quality.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67497778","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 : 2023-01-01DOI: 10.18178/ijmerr.12.2.64-77
M. Skaldebø, B. A. Haugaløkken, I. Schjølberg
—This paper introduces a novel distance estimator using monocular vision for autonomous underwater grasping. The presented method is also applicable to topside grasping operations. The estimator is developed for robot manipulators with a monocular camera placed near the gripper. The fact that the camera is attached near the gripper makes it possible to design a method for capturing images from different positions, as the relative position change can be measured. The presented system can estimate relative distance to an object of unknown size with good precision. The manipulator applied in the presented work is the SeaArm-2, a fully electric underwater small modular manipulator. The manipulator is unique in its integrated monocular camera in the end-effector module, and its design facilitates the use of different end-effector tools. The camera is used for supervision, object detection, and tracking. The distance estimator was validated in a laboratory setting through autonomous grasping experiments. The manipulator was able to search for and find, estimate the relative distance of, grasp, and retrieve the relevant object in 12 out of 12 trials.
{"title":"Autonomous Grasping Using Novel Distance Estimator","authors":"M. Skaldebø, B. A. Haugaløkken, I. Schjølberg","doi":"10.18178/ijmerr.12.2.64-77","DOIUrl":"https://doi.org/10.18178/ijmerr.12.2.64-77","url":null,"abstract":"—This paper introduces a novel distance estimator using monocular vision for autonomous underwater grasping. The presented method is also applicable to topside grasping operations. The estimator is developed for robot manipulators with a monocular camera placed near the gripper. The fact that the camera is attached near the gripper makes it possible to design a method for capturing images from different positions, as the relative position change can be measured. The presented system can estimate relative distance to an object of unknown size with good precision. The manipulator applied in the presented work is the SeaArm-2, a fully electric underwater small modular manipulator. The manipulator is unique in its integrated monocular camera in the end-effector module, and its design facilitates the use of different end-effector tools. The camera is used for supervision, object detection, and tracking. The distance estimator was validated in a laboratory setting through autonomous grasping experiments. The manipulator was able to search for and find, estimate the relative distance of, grasp, and retrieve the relevant object in 12 out of 12 trials.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67497678","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 : 2023-01-01DOI: 10.18178/ijmerr.12.2.91-98
Yun-Ju Chuang, Yin-Tung Sun, H. Chang, T. Tsung
—In this study, we produced a testing model for evaluating the movement force involved in the hand guidance of a collaborative robot (CoBot). Hand guiding is a new concept in the field of CoBots and is one of the main topics of the International Organization for Standardization’s Technical Specifications 15066. The movement force of a four-degrees-of-freedom ceiling-mounted CoBot in a workspace was analyzed in this study. The research proposed a new method to evaluate the hand guiding operation of a CoBot: first, the movement force was measured; second, an image model was produced using these measurements; third, the movement forces for a workspace were analyzed ; finally, using these image models, conclusions and recommendations were formulated, detailing the safety requirements of hand guiding operations.
{"title":"Measuring the Movement Force of a CoBot to Evaluate Hand Guiding Operation","authors":"Yun-Ju Chuang, Yin-Tung Sun, H. Chang, T. Tsung","doi":"10.18178/ijmerr.12.2.91-98","DOIUrl":"https://doi.org/10.18178/ijmerr.12.2.91-98","url":null,"abstract":"—In this study, we produced a testing model for evaluating the movement force involved in the hand guidance of a collaborative robot (CoBot). Hand guiding is a new concept in the field of CoBots and is one of the main topics of the International Organization for Standardization’s Technical Specifications 15066. The movement force of a four-degrees-of-freedom ceiling-mounted CoBot in a workspace was analyzed in this study. The research proposed a new method to evaluate the hand guiding operation of a CoBot: first, the movement force was measured; second, an image model was produced using these measurements; third, the movement forces for a workspace were analyzed ; finally, using these image models, conclusions and recommendations were formulated, detailing the safety requirements of hand guiding operations.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67497753","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 : 2023-01-01DOI: 10.18178/ijmerr.12.3.151-158
Nursultan Zhetenbayev, G. Balbayev, Algazy Zhauyt, B. Shingissov
—As one of the most injured joints of the human body, the ankle is often prone to sprains or fractures that require help in movement to restore mobility. While physical therapists typically perform rehabilitation in one-on-one sessions with patients, several successful robotic rehabilitation solutions have been proposed in recent years. However, their design is usually bulky and requires the patient to sit or stand in a static position. This paper presents devotes to a new design of a device as an exoskeleton for the ankle joint that promotes movement of a person with disability. The proposed design is characterized by a lightweight and inexpensive design for various users with easy-to-wear functions and simple operation. The exoskeleton is supported by four linear electric actuators to enable ankle movements in three directions. A CAD model is developed for proposed design parts and simulations, the results of which provide data on the feasibility of the design and its main performance characteristics. 3D modeling and simulation calculations were performed in a virtual environment using Solidworks Simulation software and motion simulation. Solidworks Simulation provides an electric linear actuator that generates ankle movement. The proposed design of the mechanism using kinematic and static models is analyzed, a scheme of the control structure is developed.
{"title":"Design and Performance of the New Ankle Joint Exoskeleton","authors":"Nursultan Zhetenbayev, G. Balbayev, Algazy Zhauyt, B. Shingissov","doi":"10.18178/ijmerr.12.3.151-158","DOIUrl":"https://doi.org/10.18178/ijmerr.12.3.151-158","url":null,"abstract":"—As one of the most injured joints of the human body, the ankle is often prone to sprains or fractures that require help in movement to restore mobility. While physical therapists typically perform rehabilitation in one-on-one sessions with patients, several successful robotic rehabilitation solutions have been proposed in recent years. However, their design is usually bulky and requires the patient to sit or stand in a static position. This paper presents devotes to a new design of a device as an exoskeleton for the ankle joint that promotes movement of a person with disability. The proposed design is characterized by a lightweight and inexpensive design for various users with easy-to-wear functions and simple operation. The exoskeleton is supported by four linear electric actuators to enable ankle movements in three directions. A CAD model is developed for proposed design parts and simulations, the results of which provide data on the feasibility of the design and its main performance characteristics. 3D modeling and simulation calculations were performed in a virtual environment using Solidworks Simulation software and motion simulation. Solidworks Simulation provides an electric linear actuator that generates ankle movement. The proposed design of the mechanism using kinematic and static models is analyzed, a scheme of the control structure is developed.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67497942","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 : 2023-01-01DOI: 10.18178/ijmerr.12.5.306-312
Minh Tuan Ngo, Quoc Tuan Nguyen
—Tungsten carbide is a compound of tungsten and carbon which has high compressive strength and hardness. Therefore, Tungsten carbide is widely used in manufacturing tools, dies, and rollers. This paper researches to determine the optimal set of machining parameters and analyze the surface roughness and the wear mechanism when turning carbide materials using CBN inserts. A face central composite model is used to determine the optimal cutting parameter with minimum surface roughness, minimum flank wear, and both. Verification experiments with those three sets of optimal cutting parameters were performed. The tool wears characteristics for the three optimal cutting modes are also analyzed. The results show that mechanical abrasion, scratching, and wear due to adhesion occurs when machining carbide inserts. As the cutting speed increases, the wear due to adhesion increases.
{"title":"Multi-response Optimization and Analysis Wear Mechanism of CBN Inserts in the Tungsten Carbide Hard Turning Process","authors":"Minh Tuan Ngo, Quoc Tuan Nguyen","doi":"10.18178/ijmerr.12.5.306-312","DOIUrl":"https://doi.org/10.18178/ijmerr.12.5.306-312","url":null,"abstract":"—Tungsten carbide is a compound of tungsten and carbon which has high compressive strength and hardness. Therefore, Tungsten carbide is widely used in manufacturing tools, dies, and rollers. This paper researches to determine the optimal set of machining parameters and analyze the surface roughness and the wear mechanism when turning carbide materials using CBN inserts. A face central composite model is used to determine the optimal cutting parameter with minimum surface roughness, minimum flank wear, and both. Verification experiments with those three sets of optimal cutting parameters were performed. The tool wears characteristics for the three optimal cutting modes are also analyzed. The results show that mechanical abrasion, scratching, and wear due to adhesion occurs when machining carbide inserts. As the cutting speed increases, the wear due to adhesion increases.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136208438","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 : 2023-01-01DOI: 10.18178/ijmerr.12.2.84-90
R. Tarakka, N. Salam, A. A. Mochtar, W. Rauf, M. Ihsan
—Aerodynamics related to the generation of drag due to flow separations that occurs at rear parts of vehicles is an important consideration in vehicle design. It includes flow separation, wake formation, and pressures, which, in this paper, are focused on the ones exerted on the model’s rear wall. The pressure reductions could differ significantly between vehicles’ front and rear walls. This pressure difference can generate a phenomenon of backward pull and an increase in drags. The effort to minimize backflow as well as to cater increasing pressure on vehicles’ rear wall can be achieved by applying active control, including attached blowing apparatus. The paper presents the analysis of the effect on the application of blowing active control on the aerodynamics on rear part of vehicles, which is represented by a modified Ahmed body, reversed in flow direction and altered dimensions. The research was conducted using a validated numerical simulation method with laboratory experiments at an upstream air speed of 16.7 m/s and blowing velocities of 0.5 m/s, 1.0 m/s, and 1.5 m/s. The results showed that the application of blowing active control was capable to reduce aerodynamic drag, with the highest decrease achieved in the model with a ratio of velocity UBL3/U0=0.09 of 12.187% for the computational method and 11.556% for the experimental one.
{"title":"On the Aerodynamics of Rear of Vehicle Model with Active Control by Blowing: Computational and Experimental Analysis","authors":"R. Tarakka, N. Salam, A. A. Mochtar, W. Rauf, M. Ihsan","doi":"10.18178/ijmerr.12.2.84-90","DOIUrl":"https://doi.org/10.18178/ijmerr.12.2.84-90","url":null,"abstract":"—Aerodynamics related to the generation of drag due to flow separations that occurs at rear parts of vehicles is an important consideration in vehicle design. It includes flow separation, wake formation, and pressures, which, in this paper, are focused on the ones exerted on the model’s rear wall. The pressure reductions could differ significantly between vehicles’ front and rear walls. This pressure difference can generate a phenomenon of backward pull and an increase in drags. The effort to minimize backflow as well as to cater increasing pressure on vehicles’ rear wall can be achieved by applying active control, including attached blowing apparatus. The paper presents the analysis of the effect on the application of blowing active control on the aerodynamics on rear part of vehicles, which is represented by a modified Ahmed body, reversed in flow direction and altered dimensions. The research was conducted using a validated numerical simulation method with laboratory experiments at an upstream air speed of 16.7 m/s and blowing velocities of 0.5 m/s, 1.0 m/s, and 1.5 m/s. The results showed that the application of blowing active control was capable to reduce aerodynamic drag, with the highest decrease achieved in the model with a ratio of velocity UBL3/U0=0.09 of 12.187% for the computational method and 11.556% for the experimental one.","PeriodicalId":37784,"journal":{"name":"International Journal of Mechanical Engineering and Robotics Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67497736","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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