Pub Date : 2023-05-26DOI: 10.1109/ICMIMT59138.2023.10200882
Calvinia K. Kgatwe, O. Olatunji, P. Adedeji, N. Madushele
Fuzzy logic systems are intelligent systems applied in equipment condition monitoring. Fuzzy logic systems are well known for their ability to deal with data complexity for better analysis and interpretation. A basic fuzzy logic system consists of four essential parts, among which is the fuzzy inference engine. A fuzzy inference engine is a framework that describes the actual process of converting inputs into outputs using fuzzy logic. However, some challenges have been recognizable in the fuzzy inference engine. Given this, the study aims to systematically review existing literature trends on approaches used for determining parameters of the fuzzy inference system. Specifically, the study examines the methods of assigning membership functions and rules. The study further discusses the contributions of membership functions and rules on fuzzy inference and fuzzy logic systems. Then the study concludes that the system’s parameters are configured based on the problem size and type. Also, there is no standard method of defining or improving parameters to advance the system’s performance. Furthermore, a substantial interrelation between parameters affects the inference system results. Therefore, the study also proposes new ideas for expanding the literature on inference system parameters to improve the overall system’s effectiveness. Moreover, the study recommended future research to be on studies that investigate the contribution of individual parameters on the inference engine. This will enable monitoring of the parameter’s level of impact and the shortcomings of these effects on the inference engine performance. Lastly, a study focusing on the rule reduction methods and the acceptable conditions for carrying out rule reduction is recommended. This study is of importance since indistinct information has been provided on rule reduction, even though it proves to be effective in altering the performance and accuracy of the inference system.
{"title":"Fuzzy Inference Engine in Condition Monitoring of Industrial Equipment: An Overview","authors":"Calvinia K. Kgatwe, O. Olatunji, P. Adedeji, N. Madushele","doi":"10.1109/ICMIMT59138.2023.10200882","DOIUrl":"https://doi.org/10.1109/ICMIMT59138.2023.10200882","url":null,"abstract":"Fuzzy logic systems are intelligent systems applied in equipment condition monitoring. Fuzzy logic systems are well known for their ability to deal with data complexity for better analysis and interpretation. A basic fuzzy logic system consists of four essential parts, among which is the fuzzy inference engine. A fuzzy inference engine is a framework that describes the actual process of converting inputs into outputs using fuzzy logic. However, some challenges have been recognizable in the fuzzy inference engine. Given this, the study aims to systematically review existing literature trends on approaches used for determining parameters of the fuzzy inference system. Specifically, the study examines the methods of assigning membership functions and rules. The study further discusses the contributions of membership functions and rules on fuzzy inference and fuzzy logic systems. Then the study concludes that the system’s parameters are configured based on the problem size and type. Also, there is no standard method of defining or improving parameters to advance the system’s performance. Furthermore, a substantial interrelation between parameters affects the inference system results. Therefore, the study also proposes new ideas for expanding the literature on inference system parameters to improve the overall system’s effectiveness. Moreover, the study recommended future research to be on studies that investigate the contribution of individual parameters on the inference engine. This will enable monitoring of the parameter’s level of impact and the shortcomings of these effects on the inference engine performance. Lastly, a study focusing on the rule reduction methods and the acceptable conditions for carrying out rule reduction is recommended. This study is of importance since indistinct information has been provided on rule reduction, even though it proves to be effective in altering the performance and accuracy of the inference system.","PeriodicalId":286146,"journal":{"name":"2023 14th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004351","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 : 2023-05-26DOI: 10.1109/ICMIMT59138.2023.10199846
Ngazibini Mayila, P. M. Mashinini, Mothibeli Pita
Copper has a wide range of applications because of its great thermal and electrical conductivity, corrosion and fatigue resistance, and good flexibility. In this paper, the effect of preheating on the mechanical properties of similar friction stir welded plates were investigated. Copper plates were preheated at 450, 550 and 650°C and welded at a rotational speed of 600rpm, a constant transverse speed of 400 mm/min, and a plunge depth of 3,5mm using a cylindrical pin profile. The welded samples were characterized by optical microscope. Tensile and hardness tests were conducted following the ASTM E8-04 and ASTM E92- 82 respectively. The results showed the stir zone consists of fine and equiaxed recrystallized grains with precipitates compared to the parent material. The effect of preheating showed a decrease in the tensile strength of the joint. The average hardness of 650 °C preheated weld joint was reported be the highest as compared to the other joints.
{"title":"Effect of Preheating on Mechanical Properties and Microstructural Behaviour of Friction Stir Welded Copper Joints","authors":"Ngazibini Mayila, P. M. Mashinini, Mothibeli Pita","doi":"10.1109/ICMIMT59138.2023.10199846","DOIUrl":"https://doi.org/10.1109/ICMIMT59138.2023.10199846","url":null,"abstract":"Copper has a wide range of applications because of its great thermal and electrical conductivity, corrosion and fatigue resistance, and good flexibility. In this paper, the effect of preheating on the mechanical properties of similar friction stir welded plates were investigated. Copper plates were preheated at 450, 550 and 650°C and welded at a rotational speed of 600rpm, a constant transverse speed of 400 mm/min, and a plunge depth of 3,5mm using a cylindrical pin profile. The welded samples were characterized by optical microscope. Tensile and hardness tests were conducted following the ASTM E8-04 and ASTM E92- 82 respectively. The results showed the stir zone consists of fine and equiaxed recrystallized grains with precipitates compared to the parent material. The effect of preheating showed a decrease in the tensile strength of the joint. The average hardness of 650 °C preheated weld joint was reported be the highest as compared to the other joints.","PeriodicalId":286146,"journal":{"name":"2023 14th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129015949","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 : 2023-05-26DOI: 10.1109/ICMIMT59138.2023.10200088
Siviwe Mrausi, J. Trimble, O. Olabanji, I. Tlhabadira, I. Daniyan
Brake discs and pads are among the most crucial performance and safety components within an automotive braking mechanism. Recent advances in the development of brake discs and pads have witnessed the use of organic and cost-effective materials, which are less harmful to the human health and the environment. In view of this, this study aims to investigate the some mechanical properties of the automotive brake pads and discs developed from locally sourced materials. First, the design calculations were carried out to establish the tangential force between pad and rotor (inner and outer face), the braking torque and distance as well as the amount of heat generated through braking. Secondly, the Abaqus explicit mode was employed for the investigation of the wear, stress, strain analysis. In the analysis of successive interactions of the thermal and mechanical forces on the brake disc and pads, the static general and thermal steps were created and successively invoked. The thermal analysis was first carried and subsequently invoked as the initial conditions for the analysis of mechanical forces in the static general analysis step in order to determine the wear, stress and strain distributions when the brake disc and pad works under the required conditions. The results obtained indicated that with Kevlar 29 stood out as the most suitable material in terms of heat resistance. However, for the brake disc, the materials exhibited different behaviours under the same required service conditions when combined with Kevlar 29. Thus, in order to determine the most suitable material, there may be a need to consider other factors such as cost, manufacturability, strength etc. In addition, there may be a need to carry out optimisation of the process parameters such as the braking temperature and pressure. The findings of this study may be useful for the materials developers in the automotive industry in investigating the potential performance or behavior of automotive braking components under the required service conditions.
{"title":"Investigating the Mechanical Properties of Automotive Brake Disc and Pad Developed from Locally Sourced Materials","authors":"Siviwe Mrausi, J. Trimble, O. Olabanji, I. Tlhabadira, I. Daniyan","doi":"10.1109/ICMIMT59138.2023.10200088","DOIUrl":"https://doi.org/10.1109/ICMIMT59138.2023.10200088","url":null,"abstract":"Brake discs and pads are among the most crucial performance and safety components within an automotive braking mechanism. Recent advances in the development of brake discs and pads have witnessed the use of organic and cost-effective materials, which are less harmful to the human health and the environment. In view of this, this study aims to investigate the some mechanical properties of the automotive brake pads and discs developed from locally sourced materials. First, the design calculations were carried out to establish the tangential force between pad and rotor (inner and outer face), the braking torque and distance as well as the amount of heat generated through braking. Secondly, the Abaqus explicit mode was employed for the investigation of the wear, stress, strain analysis. In the analysis of successive interactions of the thermal and mechanical forces on the brake disc and pads, the static general and thermal steps were created and successively invoked. The thermal analysis was first carried and subsequently invoked as the initial conditions for the analysis of mechanical forces in the static general analysis step in order to determine the wear, stress and strain distributions when the brake disc and pad works under the required conditions. The results obtained indicated that with Kevlar 29 stood out as the most suitable material in terms of heat resistance. However, for the brake disc, the materials exhibited different behaviours under the same required service conditions when combined with Kevlar 29. Thus, in order to determine the most suitable material, there may be a need to consider other factors such as cost, manufacturability, strength etc. In addition, there may be a need to carry out optimisation of the process parameters such as the braking temperature and pressure. The findings of this study may be useful for the materials developers in the automotive industry in investigating the potential performance or behavior of automotive braking components under the required service conditions.","PeriodicalId":286146,"journal":{"name":"2023 14th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130369413","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 : 2023-05-26DOI: 10.1109/ICMIMT59138.2023.10199783
Z. Zondi, T. Ngonda, M. Kaunda
Overhead power cables get exposed to wind motions that eventually cause oscillation and significant fatigue failure to them. Aeolian vibration is one of the most common vibrations caused by high frequency and low amplitude. Although other wind motion vibrations cause fatigue failures on transmission lines, Aeolian vibrations account for a greater percentage of these fatigue failures. Various devices have been developed, designed, and implemented to minimise vibrations on power lines. The Stockbridge damper is one of the standard dampers that is used. The fundamental understanding of the asymmetric Stockbridge damper is studied in this review paper. The focus is on the mechanism of the damper, resonance frequencies, and amplitudes of vibrations. The review will also focus on the developments made to increase the efficiency of the Stockbridge damper.
{"title":"Modification of a Stockbridge Damper: A Review*","authors":"Z. Zondi, T. Ngonda, M. Kaunda","doi":"10.1109/ICMIMT59138.2023.10199783","DOIUrl":"https://doi.org/10.1109/ICMIMT59138.2023.10199783","url":null,"abstract":"Overhead power cables get exposed to wind motions that eventually cause oscillation and significant fatigue failure to them. Aeolian vibration is one of the most common vibrations caused by high frequency and low amplitude. Although other wind motion vibrations cause fatigue failures on transmission lines, Aeolian vibrations account for a greater percentage of these fatigue failures. Various devices have been developed, designed, and implemented to minimise vibrations on power lines. The Stockbridge damper is one of the standard dampers that is used. The fundamental understanding of the asymmetric Stockbridge damper is studied in this review paper. The focus is on the mechanism of the damper, resonance frequencies, and amplitudes of vibrations. The review will also focus on the developments made to increase the efficiency of the Stockbridge damper.","PeriodicalId":286146,"journal":{"name":"2023 14th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)","volume":"9 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125692203","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 : 2023-05-26DOI: 10.1109/ICMIMT59138.2023.10200488
Peleki Sekwakwa, Amanda Cholo, I. Okokpujie, L. Tartibu
Dust particles are developed in the cement kiln device during the production of the cement. At some point, the dust escapes into the atmosphere and pollutes the air and environment. A dry Electrostatic Precipitator (ESP) was required in order to minimize the pollution. It was designed using Autodesk Inventor Professional software. A numerical simulation was conducted using the boundary conditions to determine the separator efficiencies, particle resident times and particle velocities at different cases. ANSYS 2022 R2 Fluent was used to perform simulation. The results of the simulations are in good agreement with those in the literature study, such as the number of elements and velocity of the particles. Some of the boundary conditions were assumed when performing the simulation.
{"title":"Design and Numerical Analysis of an Electrostatic Precipitator","authors":"Peleki Sekwakwa, Amanda Cholo, I. Okokpujie, L. Tartibu","doi":"10.1109/ICMIMT59138.2023.10200488","DOIUrl":"https://doi.org/10.1109/ICMIMT59138.2023.10200488","url":null,"abstract":"Dust particles are developed in the cement kiln device during the production of the cement. At some point, the dust escapes into the atmosphere and pollutes the air and environment. A dry Electrostatic Precipitator (ESP) was required in order to minimize the pollution. It was designed using Autodesk Inventor Professional software. A numerical simulation was conducted using the boundary conditions to determine the separator efficiencies, particle resident times and particle velocities at different cases. ANSYS 2022 R2 Fluent was used to perform simulation. The results of the simulations are in good agreement with those in the literature study, such as the number of elements and velocity of the particles. Some of the boundary conditions were assumed when performing the simulation.","PeriodicalId":286146,"journal":{"name":"2023 14th International Conference on Mechanical and Intelligent Manufacturing Technologies (ICMIMT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128597163","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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