Pub Date : 2020-12-19DOI: 10.24018/ejers.2020.0.cie.2303
Manolis Chalaris, S. Gritzalis, C. Sgouropoulou, M. Maragoudakis
Aim of the current research paper is to propose an innovative solution for the problematic of the holistic management of an academic strategy. The systematic bibliographic surveys conducted showed that the combination of BSC method together with a multitude of MCDA techniques constitute the most important tools for this issue. Thus, we propose a holistic process-based methodology for the management of an academic strategy which spans from its design and oversight, to interpretation issues of the academic classification of departments of Universities or between Universities where assembly bodies (Quality Assurance Unit, HAHE) are active. We claim that our methodology is of particular importance and that its use will highlight the operational quality of well organised Universities.
{"title":"Development of a Methodology for the Design and Management of Academic Strategy – A Holist Approach using Multi-criteria Analysis Techniques","authors":"Manolis Chalaris, S. Gritzalis, C. Sgouropoulou, M. Maragoudakis","doi":"10.24018/ejers.2020.0.cie.2303","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2303","url":null,"abstract":"Aim of the current research paper is to propose an innovative solution for the problematic of the holistic management of an academic strategy. The systematic bibliographic surveys conducted showed that the combination of BSC method together with a multitude of MCDA techniques constitute the most important tools for this issue. Thus, we propose a holistic process-based methodology for the management of an academic strategy which spans from its design and oversight, to interpretation issues of the academic classification of departments of Universities or between Universities where assembly bodies (Quality Assurance Unit, HAHE) are active. We claim that our methodology is of particular importance and that its use will highlight the operational quality of well organised Universities.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79372833","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 : 2020-12-19DOI: 10.24018/ejers.2020.0.cie.2310
G. Koutromanos, T. Pittara, Christopher Tripoulas
The aim of this study was the design, development, and evaluation of an Augmented Reality game to teach students about the local history of a Greek island. Design-based research served as the foundation of this study’s methodology. Experts in ICT in education, teachers with knowledge of the local history and primary education students participated in the evaluation of this study. The results of the evaluation showed that the game presents satisfactory levels of usability and that its content is compatible with the island’s local history. Among the factors influencing its use by students were internet connectivity, the large number of visitors at the archaeological site where the game was played, and the problem of coordinating the student groups.
{"title":"“Clavis Aurea”: An augmented Reality Game for the Teaching of Local History","authors":"G. Koutromanos, T. Pittara, Christopher Tripoulas","doi":"10.24018/ejers.2020.0.cie.2310","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2310","url":null,"abstract":"The aim of this study was the design, development, and evaluation of an Augmented Reality game to teach students about the local history of a Greek island. Design-based research served as the foundation of this study’s methodology. Experts in ICT in education, teachers with knowledge of the local history and primary education students participated in the evaluation of this study. The results of the evaluation showed that the game presents satisfactory levels of usability and that its content is compatible with the island’s local history. Among the factors influencing its use by students were internet connectivity, the large number of visitors at the archaeological site where the game was played, and the problem of coordinating the student groups.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81890690","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 : 2020-12-19DOI: 10.24018/ejers.2020.0.cie.2306
I. Papadogiannis, N. Platis, V. Poulopoulos, C. Vassilakis, George Lepouras, Manolis Wallace, G. Karountzou
This article provides a visualization of a literature review in students’ performance prediction using educational data mining (EDM) techniques for the period 2015-2019. The results of the review are presented concisely and simply with the use of diagrams. Various aspects of the literature are examined, such as the algorithms adopted, the type of results drawn, the educational setting of the application and the actual exploitation of the outcomes. Findings indicate that tertiary education dominates the EDM field; in contrast, the focus given to secondary and primary education is minimal.
{"title":"Visualizing the Educational Data Mining Literature","authors":"I. Papadogiannis, N. Platis, V. Poulopoulos, C. Vassilakis, George Lepouras, Manolis Wallace, G. Karountzou","doi":"10.24018/ejers.2020.0.cie.2306","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2306","url":null,"abstract":"This article provides a visualization of a literature review in students’ performance prediction using educational data mining (EDM) techniques for the period 2015-2019. The results of the review are presented concisely and simply with the use of diagrams. Various aspects of the literature are examined, such as the algorithms adopted, the type of results drawn, the educational setting of the application and the actual exploitation of the outcomes. Findings indicate that tertiary education dominates the EDM field; in contrast, the focus given to secondary and primary education is minimal.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86882483","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 : 2020-12-19DOI: 10.24018/ejers.2020.0.cie.2302
Eleni Seralidou, Nikos Vallianatos, Dimitra Tsolakou, C. Douligeris
The purpose of this paper is the design, development and presentation of two applications that are created in order to be used for supporting the students’ learning in the Greek secondary education environment. More specifically, we present the structure and the functions of two applications under the names “Aepp_App” and “CS_App”. The applications are intended to be used by teachers and students during a lesson as well as outside the classroom settings, with the use of android mobile devices. We present the tools that have been used to develop the mobile applications and the applications’ use in the educational process. Additionally, we present the feedback received by teachers, to whom the applications were presented, who seem to like the idea of using game applications for mobile devices in order to enhance their students’ interest.
{"title":"Design, Development and Implementation of Mobile Applications to Support the Educational Process in the Greek Secondary Education System","authors":"Eleni Seralidou, Nikos Vallianatos, Dimitra Tsolakou, C. Douligeris","doi":"10.24018/ejers.2020.0.cie.2302","DOIUrl":"https://doi.org/10.24018/ejers.2020.0.cie.2302","url":null,"abstract":"The purpose of this paper is the design, development and presentation of two applications that are created in order to be used for supporting the students’ learning in the Greek secondary education environment. More specifically, we present the structure and the functions of two applications under the names “Aepp_App” and “CS_App”. The applications are intended to be used by teachers and students during a lesson as well as outside the classroom settings, with the use of android mobile devices. We present the tools that have been used to develop the mobile applications and the applications’ use in the educational process. Additionally, we present the feedback received by teachers, to whom the applications were presented, who seem to like the idea of using game applications for mobile devices in order to enhance their students’ interest.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83104682","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 : 2020-12-16DOI: 10.24018/ejers.2020.5.12.2262
Vinit J. Kedare, S. S. Kharat, S. Tawde
Air pollution is one of the most concerned issue worldwide as it affects the population at a time. Indoor air contamination can be due to different forms of allergens, smoke, mold, radon, and other pollutants all negatively impact the health of building occupants. These pollutants can have severe effects on health of individuals up to 10 times worse than the outdoor air pollution due to lack of ventilation. For purification of air an attempt has been made to construct a purifier using filters that can trap the indoor air pollutants. The prepared model is constructed considering the cost and working efficiency for maintaining a healthy indoor environment. The model is based on the filtration of air through compact filters (HEPA filters) that are more efficient than any other filters. To analyze the indoor air quality and the working efficiency of the purifier, certain quantitative analysis of the air micro-flora and the total mass concentration of the indoor dust were conducted at four locations in the premises of B. K. Birla College (Autonomous), Kalyan. Quality of the indoor air before using the Constructed Indoor Air purifier and during the use of purifier was checked. The resulted data showed a decrease in the microbial population as well as reduction in the concentration of dust particles, thus indicating the working efficiency of the constructed purifier.
{"title":"Effectiveness of Constructed Indoor Air Purifier to Enhance Indoor Air Quality","authors":"Vinit J. Kedare, S. S. Kharat, S. Tawde","doi":"10.24018/ejers.2020.5.12.2262","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2262","url":null,"abstract":"Air pollution is one of the most concerned issue worldwide as it affects the population at a time. Indoor air contamination can be due to different forms of allergens, smoke, mold, radon, and other pollutants all negatively impact the health of building occupants. These pollutants can have severe effects on health of individuals up to 10 times worse than the outdoor air pollution due to lack of ventilation. For purification of air an attempt has been made to construct a purifier using filters that can trap the indoor air pollutants. The prepared model is constructed considering the cost and working efficiency for maintaining a healthy indoor environment. The model is based on the filtration of air through compact filters (HEPA filters) that are more efficient than any other filters. To analyze the indoor air quality and the working efficiency of the purifier, certain quantitative analysis of the air micro-flora and the total mass concentration of the indoor dust were conducted at four locations in the premises of B. K. Birla College (Autonomous), Kalyan. Quality of the indoor air before using the Constructed Indoor Air purifier and during the use of purifier was checked. The resulted data showed a decrease in the microbial population as well as reduction in the concentration of dust particles, thus indicating the working efficiency of the constructed purifier.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86983338","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 : 2020-12-16DOI: 10.24018/ejers.2020.5.12.2230
S. N. Chibuzor, E. Okoyeh, B. Egboka
Regolith derived from Nanka Formation; Southeast Nigeria was evaluated for their geotechnical characteristics. The methods of investigations include Fieldwork experiment and laboratory analysis of water and soil samples. The result of hydraulic parameters of the soil at 1meter, 2 meters depth and drilled cuttings from boreholes revealed permeability average values of 1.29E-05(cm/s) and 9.15E-6(cm/s), hydraulic conductivity average value of 1.27E-04(cm/s) and 8.93E-05(cm/s). Drilled cuttings from three boreholes revealed permeability average value of 8.15E-06(m/s), 2.68E-06(m/s) and 6.20E-06, hydraulic conductivity average values of 8.90E-03(m/s), 2.92E-03(m/s) and 6.75E-3(m/s).These values indicate permeable soil with high hydraulic conductivity typical of silty-clay and sand. The permeability/hydraulic conductivity accounts for the high infiltration/percolation of water into the soil. Infiltration of water through the soil initiates geochemical reactions and dissolution mineral which leaves the soil loose and unconsolidated. Geotechnical characteristics show low to medium plasticity and a liquid limit average of 42.36 and 35.45, indicating the capacity of the soil to absorb moisture and expand, bulk density average value of 1.90 mg/m3and compaction test of maximum dry density average value of 1.80 g/cm3 at an optimum water content average of 12.89% indicate low density. Shear strength components of cohesion values range from 0 to 55KN/m2 with average value of 25 KN/m2 and friction angle values range from 7° to 25° suggesting low cohesion and angle of internal friction. This is attributed to the low clay content and the cohesive force is not enough to sustain the soil. Field experiments of cone penetration test of in-situ results indicate a weak and incompetent soil material that is unstable and vulnerable to erosion. The finding would be relevant in soil mechanics problems.
{"title":"Geotechnical Characteristics of Regolith Derived from Nanka Formation, Southeast Nigeria","authors":"S. N. Chibuzor, E. Okoyeh, B. Egboka","doi":"10.24018/ejers.2020.5.12.2230","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2230","url":null,"abstract":"Regolith derived from Nanka Formation; Southeast Nigeria was evaluated for their geotechnical characteristics. The methods of investigations include Fieldwork experiment and laboratory analysis of water and soil samples. The result of hydraulic parameters of the soil at 1meter, 2 meters depth and drilled cuttings from boreholes revealed permeability average values of 1.29E-05(cm/s) and 9.15E-6(cm/s), hydraulic conductivity average value of 1.27E-04(cm/s) and 8.93E-05(cm/s). Drilled cuttings from three boreholes revealed permeability average value of 8.15E-06(m/s), 2.68E-06(m/s) and 6.20E-06, hydraulic conductivity average values of 8.90E-03(m/s), 2.92E-03(m/s) and 6.75E-3(m/s).These values indicate permeable soil with high hydraulic conductivity typical of silty-clay and sand. The permeability/hydraulic conductivity accounts for the high infiltration/percolation of water into the soil. Infiltration of water through the soil initiates geochemical reactions and dissolution mineral which leaves the soil loose and unconsolidated. Geotechnical characteristics show low to medium plasticity and a liquid limit average of 42.36 and 35.45, indicating the capacity of the soil to absorb moisture and expand, bulk density average value of 1.90 mg/m3and compaction test of maximum dry density average value of 1.80 g/cm3 at an optimum water content average of 12.89% indicate low density. Shear strength components of cohesion values range from 0 to 55KN/m2 with average value of 25 KN/m2 and friction angle values range from 7° to 25° suggesting low cohesion and angle of internal friction. This is attributed to the low clay content and the cohesive force is not enough to sustain the soil. Field experiments of cone penetration test of in-situ results indicate a weak and incompetent soil material that is unstable and vulnerable to erosion. The finding would be relevant in soil mechanics problems.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76584909","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 : 2020-12-15DOI: 10.24018/ejers.2020.5.12.2129
Konstantinos Salpasaranis, Vasilios Stylianakis
The coronavirus disease 2019 (COVID-19) diffusion process, starting in China, caused more than 4600 lives until June 2020 and became a major threat to global public health systems. In Greece, the phenomenon started on February 2020 and it is still being developed. This paper presents the implementation of a hybrid Genetic Programming (hGP) method in finding fitting models of the Coronavirus (COVID 19) for the cumulative confirmed cases in China for the first saturation level until May 2020 and it proposes forecasting models for Greece before summer tourist season. The specific hGP method encapsulates the use of some well-known diffusion models for forecasting purposes, epidemiological models and produces time dependent models with high performance statistical indices. A retrospective study confirmed the excellent forecasting performance of the method until 3 June 2020.
{"title":"Forecasting Models of the Coronavirus (COVID-19) Cumulative Confirmed Cases Using a Hybrid Genetic Programming Method","authors":"Konstantinos Salpasaranis, Vasilios Stylianakis","doi":"10.24018/ejers.2020.5.12.2129","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2129","url":null,"abstract":"The coronavirus disease 2019 (COVID-19) diffusion process, starting in China, caused more than 4600 lives until June 2020 and became a major threat to global public health systems. In Greece, the phenomenon started on February 2020 and it is still being developed. This paper presents the implementation of a hybrid Genetic Programming (hGP) method in finding fitting models of the Coronavirus (COVID 19) for the cumulative confirmed cases in China for the first saturation level until May 2020 and it proposes forecasting models for Greece before summer tourist season. The specific hGP method encapsulates the use of some well-known diffusion models for forecasting purposes, epidemiological models and produces time dependent models with high performance statistical indices. A retrospective study confirmed the excellent forecasting performance of the method until 3 June 2020.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85616862","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 : 2020-12-14DOI: 10.24018/ejers.2020.5.12.2276
B. Salim, J. Orfi, Shaker Alaqel
The proper utilization of all the available forms of energy resources has become imminent to meet the power requirement and energy demand in both the developed and developing countries of the world. Even though the emphasis is given to the renewable resources in most parts of the world, but fossil fuels will still remain the main resources of energy as these can meet both normal and peak demands. Saudi Arab has number of power plant based on natural gas and fuel that are spread in all its regions. These power plants have aeroderivative gas turbine units supplied by General Electric Company as main power producing units. These units work on dual fuel systems. These units work as simple gas turbine units to meat peak demands and as part of combined cycle otherwise. The subject matter of this study is the performance of one of the units of a power plant situated near Riyadh city of Saudi Arab. This unit also works both as simple gas turbine unit and as a part of combined cycle power plant unit. A parametric based performance evaluation of the unit has been carried out to study both energetic and exergetic performance of the unit for both simple and combined cycle operation. Effect of compressor inlet temperature, turbine inlet temperature, pressure ratio of the compressor, the stage from which bleed off air have been taken and percentage of bleed off air from the compressor on the energetic and exergetic performance of the unit have been studied. The study reveals that all these parameters effect the performance of the unit in both modes of operation.
{"title":"Effect of Turbine and Compressor Inlet Temperatures and Air Bleeding on the Comparative Performance of Simple and Combined Gas Turbine Unit","authors":"B. Salim, J. Orfi, Shaker Alaqel","doi":"10.24018/ejers.2020.5.12.2276","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2276","url":null,"abstract":"The proper utilization of all the available forms of energy resources has become imminent to meet the power requirement and energy demand in both the developed and developing countries of the world. Even though the emphasis is given to the renewable resources in most parts of the world, but fossil fuels will still remain the main resources of energy as these can meet both normal and peak demands. Saudi Arab has number of power plant based on natural gas and fuel that are spread in all its regions. These power plants have aeroderivative gas turbine units supplied by General Electric Company as main power producing units. These units work on dual fuel systems. These units work as simple gas turbine units to meat peak demands and as part of combined cycle otherwise. The subject matter of this study is the performance of one of the units of a power plant situated near Riyadh city of Saudi Arab. This unit also works both as simple gas turbine unit and as a part of combined cycle power plant unit. A parametric based performance evaluation of the unit has been carried out to study both energetic and exergetic performance of the unit for both simple and combined cycle operation. Effect of compressor inlet temperature, turbine inlet temperature, pressure ratio of the compressor, the stage from which bleed off air have been taken and percentage of bleed off air from the compressor on the energetic and exergetic performance of the unit have been studied. The study reveals that all these parameters effect the performance of the unit in both modes of operation.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89426969","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 : 2020-12-14DOI: 10.24018/ejers.2020.5.12.2253
A. Onah, Ernest Ezema, I. D. Egwuatu
Traditional static var compensators (SVCs) employ shunt reactors and capacitors. These standard reactive power shunt elements are controlled to produce rapid and variable reactive power. Power electronic devices like the thyristor etc. are used to switch them in or out of the network to which they are connected in response to system conditions. There are two basic types, namely the thyristor-controlled reactor (TCR), and the thyristor-switched capacitor (TSC). In this paper we wish to investigate a compensator where the reactor or capacitor is replaced by a series connected resistor and reactor (R-L). The performance equations are derived and applied to produce the compensator characteristics for each of the configurations. Their performances are compared, and the contrasts between them displayed. All three configurations are made to achieve unity power factor in a system.
{"title":"An R-L Static Var Compensator (SVC)","authors":"A. Onah, Ernest Ezema, I. D. Egwuatu","doi":"10.24018/ejers.2020.5.12.2253","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2253","url":null,"abstract":"Traditional static var compensators (SVCs) employ shunt reactors and capacitors. These standard reactive power shunt elements are controlled to produce rapid and variable reactive power. Power electronic devices like the thyristor etc. are used to switch them in or out of the network to which they are connected in response to system conditions. There are two basic types, namely the thyristor-controlled reactor (TCR), and the thyristor-switched capacitor (TSC). In this paper we wish to investigate a compensator where the reactor or capacitor is replaced by a series connected resistor and reactor (R-L). The performance equations are derived and applied to produce the compensator characteristics for each of the configurations. Their performances are compared, and the contrasts between them displayed. All three configurations are made to achieve unity power factor in a system.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80083188","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 : 2020-12-10DOI: 10.24018/ejers.2020.5.12.2256
E. Gratton, M. Benyeogor, K. Nnoli, O. Olakanmi, Liam Wolf, Zavier Berti, Sushant Kumar, P. Saha
For a robot to navigate in terrains of rough and uneven topographies, its drives and controllers must generate and control large mechanical power with great precision. This paper is aimed at developing an autonomous robot with active-suspensions in form of a hybrid quadrupedal-wheel drive mechanism. This involves a computational approach to optimizing the development cost without compromising the system’s performance. Using the Solidworks CAD tool, auxiliary components were designed and integrated with the bed structure to form an actively suspended robot drive mechanism. Also, using the S-Math Computing tool, the robot’s suspension system was optimized, employing a four-bar mechanism. To enhance the compatibility of this design with the intended controller, some mathematical equations and numerical validations were formulated and solved. These included the modeling of tip-over stability and skid steering, the trendline equations for computing the angular positions of the suspension servomotors, and the computation of R2– values for determining the accuracy of these trendline equations. Using finite element analysis (FEA), we simulated the structural integrity of key sub-components of the final structure. The results show that our mechanical design is appropriate for developing an actively suspended robot that can efficiently navigate in different terrestrial sites and topographies.
{"title":"Multi-terrain Quadrupedal-wheeled Robot Mechanism: Design, Modeling, and Analysis","authors":"E. Gratton, M. Benyeogor, K. Nnoli, O. Olakanmi, Liam Wolf, Zavier Berti, Sushant Kumar, P. Saha","doi":"10.24018/ejers.2020.5.12.2256","DOIUrl":"https://doi.org/10.24018/ejers.2020.5.12.2256","url":null,"abstract":"For a robot to navigate in terrains of rough and uneven topographies, its drives and controllers must generate and control large mechanical power with great precision. This paper is aimed at developing an autonomous robot with active-suspensions in form of a hybrid quadrupedal-wheel drive mechanism. This involves a computational approach to optimizing the development cost without compromising the system’s performance. Using the Solidworks CAD tool, auxiliary components were designed and integrated with the bed structure to form an actively suspended robot drive mechanism. Also, using the S-Math Computing tool, the robot’s suspension system was optimized, employing a four-bar mechanism. To enhance the compatibility of this design with the intended controller, some mathematical equations and numerical validations were formulated and solved. These included the modeling of tip-over stability and skid steering, the trendline equations for computing the angular positions of the suspension servomotors, and the computation of R2– values for determining the accuracy of these trendline equations. Using finite element analysis (FEA), we simulated the structural integrity of key sub-components of the final structure. The results show that our mechanical design is appropriate for developing an actively suspended robot that can efficiently navigate in different terrestrial sites and topographies.","PeriodicalId":12029,"journal":{"name":"European Journal of Engineering Research and Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86879098","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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