2018 Advances in Science and Engineering Technology International Conferences (ASET), 2018
Recently the Phononic Crystals have been an Interesting subject in the mechanical and sound struc... more Recently the Phononic Crystals have been an Interesting subject in the mechanical and sound structural applications. Their unique structural properties enable them to be designed to create complete Phononic band gaps, or ranges of frequencies in which elastic or mechanical waves are forbidden to propagate in any direction. This property particularly enables the researchers to develop models which can suppress or enable propagation of harmful or useful vibrations at selected frequency ranges. The current research analyzes the application of the Phononic Crystal technology to develop surgical tools which can improve haptic force feedback enabling surgeons with better precision, and simultaneously attenuating hand tremor vibrations to adversely affect robotic surgery precision. This paper presents a comparative study of simulation of one-dimensional Phononic Crystal surgery tool model, with other conventional models of single-phase material of common surgical tools like Steel and Titan...
2018 Advances in Science and Engineering Technology International Conferences (ASET), 2018
The problem of missing data segments is experienced frequently in measurement systems in industry... more The problem of missing data segments is experienced frequently in measurement systems in industry and research. This paper presents the technique of model estimation based method to arrive at near-accurate estimates of the missed data. The significance of this technique lies in its general applicability to linear, nonlinear, time invariant and stochastic systems. The steps of model based estimation technique is explained along with other known methods of missing data estimation. The technique is further demonstrated using real time data from a nonlinear time invariant system and validated by experimental data.
2018 Advances in Science and Engineering Technology International Conferences (ASET), 2018
The underwater is a crucial area, particularly for commercial divers. The duration and complexity... more The underwater is a crucial area, particularly for commercial divers. The duration and complexity of diver's work, makes it extremely life threatening. This issue is often disregarded since the applications used in it are extremely restricted. To reduce exposure to hazards, this paper investigates the possibility of deploying ROV to detect underwater damage using laser proximity sensor which allows for non-contact measurement to examine the surface construction of ship's hulls in favor of ensuring the structural inspections. This is a novel innovation technological application, by utilizing this technology the drone will have the ability to examine the ship and detect any damage by scanning the submerged surface of marine ships and receive accurate damage position information.
The objective of this research is to analyze and develop controller to minimize vibrations of the... more The objective of this research is to analyze and develop controller to minimize vibrations of the drill string in rotary drilling rigs. The rotary drilling process is affected by many vibrations which adversely affect the drilling efficiency. The vibrations are mainly classified into three: lateral, tosional and axial. Among the vibrations, lateral vibrations are the most destructive. The research conducted a detailed analysis on lateral vibrations. Bent drill string and unbalanced drill bit was found to be its major causes; and the resultant phenomenon was known as drill bit whirl. Practical demonstration and analysis of the bit whirl phenomenon was done by conducting experiments using an unbalanced drill bit model. Their controllability issues were also discussed and practical solutions suggested. Black box identification methods were applied to develop mathematical models for the system. Box Jenkins structure model was identified and validated by a twofold procedure. Accurate sim...
2022 Advances in Science and Engineering Technology International Conferences (ASET), 2022
Polyacrylonitrile (PAN) was electrospun from PAN and dimethylformamide (DMF) polymeric solution c... more Polyacrylonitrile (PAN) was electrospun from PAN and dimethylformamide (DMF) polymeric solution containing graphene nanoplatelets in varying weight proportions to make nanofiber composites. The diameter of fibers and surface morphology was determined by scanning electron morphology (SEM). Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were employed to conduct thermal analysis. While chemical analysis was done by means of Fourier-transform infrared spectroscopy (FTIR). No significant difference was observed in glass transition temperature in all samples with and without graphene nanoplatelets. TGA analysis exhibited the stages of thermal breakdown and weight loss in each stage. FTIR spectroscopy was used to determine the chemical bonds and molecular structure.
2022 Advances in Science and Engineering Technology International Conferences (ASET), 2022
Water scarcity has become a challenging issue since it is extremely essential in our daily life. ... more Water scarcity has become a challenging issue since it is extremely essential in our daily life. Lack of pure water in developing countries has marred human life and created various problems related to health, such as diarrhea, cholera, typhoid, dysentery, malaria, jaundice, and waterborne disease; therefore, it is very important that water must be pure and available in abundance amount in all parts of the world. New developments in filtration technology have reinvigorated interest in engineered nanosized materials such as electrospun nanofiber membrane for providing potable water at much lower cost and with minimum investment. Membrane technology has been in use for several decades and has played a crucial role in water treatment. Polymer nanofibers produced via an electrospinning process is an ideal method of fabricating electrospun nanofiber membrane for water filtration. In this research, Nanofibers were produced from two polymers such as polyacrylonitrile (PAN) and polyethylene glycol (PEG), while Dimethylformamide (DMF) was used as a solvent. The electrospun nanofibrous membranes (ENMs) thus produced via electrospinning possess super hydrophilic features and can be used for water filtration. Different water samples such as pond water, jet cutter water, tap water, deionized (DI) water, and carbon black (CB) deionized water were used in this experiment. The water samples were tested for turbidity, total dissolved solids (TDS), electrical conductivity (EC), pH, and refractive index.
2019 Advances in Science and Engineering Technology International Conferences (ASET), 2019
Multiple degrees of freedom (Multi DoF) system modeling from analytical equations is the prelimin... more Multiple degrees of freedom (Multi DoF) system modeling from analytical equations is the preliminary and essential step for mechanical and mechatronics system analysis and design. In general two major approaches are followed – Transfer function and state variable methods. In this paper, a Multi DoF system (4 mass-spring-damper cantilever beam structure) model is formulated using both approaches. The paper serves as an analysis of the step by step procedure for both approaches and a short discussion on fundamental model characteristics. Matlab ® code is utilized to analyze the models. The developed models are discussed from aspects of stability, noise control and disturbance rejection.
2011 World Congress on Sustainable Technologies (WCST), 2011
Lateral vibrations are known to be the most destructive type of vibrations affecting rotary drill... more Lateral vibrations are known to be the most destructive type of vibrations affecting rotary drilling. A whirling drill bit is one of the most prominent outcomes of lateral vibrations. Hence, it is imperative to research methodologies to minimize the drill bit whirl in order to maximize rotary drilling efficiency. Drill bit whirl can be either due to a bend drill string or due to the effect of an unbalanced drill bit. Both the cases lead to an in homogenous borehole which leads to increase in severity of the vibrations. This paper presents an analysis of the controllability of the drill bit whirl in bend drill pipes. Experimental tests conducted are analyzed and presented. The bit whirl due to drill bit bend is discussed as a probable special case of an under actuated system. A few typical under actuated system control issues are presented and the applicability of controllability solutions to the bend drill string whirl problem is discussed.
This applied research topic addresses the potential of integrating a Solar Power Assisted Ground ... more This applied research topic addresses the potential of integrating a Solar Power Assisted Ground Source Heat Pump, for the purpose of space cooling at HCT Fujairah Women's and Fujairah Men's College building(s), United Arab Emirates (UAE). The proposed model is designed such to provide sustainable cooling. A ground source heat pump dependent upon a heat transfer grid of four vertical drilled boreholes of 360-400 feet depth (100-125m) with closed vertical loop constructed of saltwater resistant polyethylene tubing, with thermally enhanced, Bentonite grouted construction, to protect from groundwater contamination, while promoting effective heat transfer between the earth and closed-loop tubes. The system will deploy thermoelectric generators and a nocturnal cooling radiator to dissipate heat from the closed loop. The system is expected to produce a cooling power of about 12 kW at an approximate cost of a solar assisted ground source cooling system of AED 80,000, about $22,000 ...
Qatar Foundation Annual Research Conference Proceedings Volume 2016 Issue 1, 2016
Drill string models are of two major types- Conventional and Periodic. Conventional drill string ... more Drill string models are of two major types- Conventional and Periodic. Conventional drill string models are widely used due to their simplicity in manufacturing and dynamics analysis. Drill strings are affected mainly by torsional, lateral and axial vibrations. The dispersive or propagative nature of these vibrations can only be analyzed by using periodic drill string models. Drill pipe makes up the majority of the drill string. In reality, at each end of the drill pipe, tubular, larger-diameter portions called the tool joints are located. Since the dimensions of the tool joint are negligible when compared to the drill pipe, conventional drill string models assume drill strings to be uniform structures. The tool joints in drill strings introduce a geometrical periodicity in the structure.A periodic structural component is comprised of a repeating array of cells, which are themselves an assembly of elements. The elements may have differing material properties as well as geometric var...
International Journal of Modelling, Identification and Control, 2012
ABSTRACT Conventionally, analytical modelling is used to analyse the dynamics of complex non-line... more ABSTRACT Conventionally, analytical modelling is used to analyse the dynamics of complex non-linear processes. This paper presents identification of mathematical models by the black box modelling method for non-linear systems. The non-linear system concerned in this work is a laboratory prototype of a rotary drilling rig. The system concerned is distinguished for its additive non-linearity at the output end. The step by step analysis of the procedures and criteria used to select an accurate model for a non-linear process by the black box identification method is explained. The model identified in the paper is a Box-Jenkins model. The model selection procedure uses least squares method, pole zero plots and residual analysis. Accurate simulation results with less than 0.05% error are obtained. The identified Box-Jenkins model is validated by a twofold validation procedure.
2019 Advances in Science and Engineering Technology International Conferences (ASET)
This paper presents a traffic management system for foggy conditions. The developed traffic manag... more This paper presents a traffic management system for foggy conditions. The developed traffic management system comprises of a fully automated green energy, fog warning and simultaneous dispersal technology.
2018 Advances in Science and Engineering Technology International Conferences (ASET), 2018
Recently the Phononic Crystals have been an Interesting subject in the mechanical and sound struc... more Recently the Phononic Crystals have been an Interesting subject in the mechanical and sound structural applications. Their unique structural properties enable them to be designed to create complete Phononic band gaps, or ranges of frequencies in which elastic or mechanical waves are forbidden to propagate in any direction. This property particularly enables the researchers to develop models which can suppress or enable propagation of harmful or useful vibrations at selected frequency ranges. The current research analyzes the application of the Phononic Crystal technology to develop surgical tools which can improve haptic force feedback enabling surgeons with better precision, and simultaneously attenuating hand tremor vibrations to adversely affect robotic surgery precision. This paper presents a comparative study of simulation of one-dimensional Phononic Crystal surgery tool model, with other conventional models of single-phase material of common surgical tools like Steel and Titan...
2018 Advances in Science and Engineering Technology International Conferences (ASET), 2018
The problem of missing data segments is experienced frequently in measurement systems in industry... more The problem of missing data segments is experienced frequently in measurement systems in industry and research. This paper presents the technique of model estimation based method to arrive at near-accurate estimates of the missed data. The significance of this technique lies in its general applicability to linear, nonlinear, time invariant and stochastic systems. The steps of model based estimation technique is explained along with other known methods of missing data estimation. The technique is further demonstrated using real time data from a nonlinear time invariant system and validated by experimental data.
2018 Advances in Science and Engineering Technology International Conferences (ASET), 2018
The underwater is a crucial area, particularly for commercial divers. The duration and complexity... more The underwater is a crucial area, particularly for commercial divers. The duration and complexity of diver's work, makes it extremely life threatening. This issue is often disregarded since the applications used in it are extremely restricted. To reduce exposure to hazards, this paper investigates the possibility of deploying ROV to detect underwater damage using laser proximity sensor which allows for non-contact measurement to examine the surface construction of ship's hulls in favor of ensuring the structural inspections. This is a novel innovation technological application, by utilizing this technology the drone will have the ability to examine the ship and detect any damage by scanning the submerged surface of marine ships and receive accurate damage position information.
The objective of this research is to analyze and develop controller to minimize vibrations of the... more The objective of this research is to analyze and develop controller to minimize vibrations of the drill string in rotary drilling rigs. The rotary drilling process is affected by many vibrations which adversely affect the drilling efficiency. The vibrations are mainly classified into three: lateral, tosional and axial. Among the vibrations, lateral vibrations are the most destructive. The research conducted a detailed analysis on lateral vibrations. Bent drill string and unbalanced drill bit was found to be its major causes; and the resultant phenomenon was known as drill bit whirl. Practical demonstration and analysis of the bit whirl phenomenon was done by conducting experiments using an unbalanced drill bit model. Their controllability issues were also discussed and practical solutions suggested. Black box identification methods were applied to develop mathematical models for the system. Box Jenkins structure model was identified and validated by a twofold procedure. Accurate sim...
2022 Advances in Science and Engineering Technology International Conferences (ASET), 2022
Polyacrylonitrile (PAN) was electrospun from PAN and dimethylformamide (DMF) polymeric solution c... more Polyacrylonitrile (PAN) was electrospun from PAN and dimethylformamide (DMF) polymeric solution containing graphene nanoplatelets in varying weight proportions to make nanofiber composites. The diameter of fibers and surface morphology was determined by scanning electron morphology (SEM). Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were employed to conduct thermal analysis. While chemical analysis was done by means of Fourier-transform infrared spectroscopy (FTIR). No significant difference was observed in glass transition temperature in all samples with and without graphene nanoplatelets. TGA analysis exhibited the stages of thermal breakdown and weight loss in each stage. FTIR spectroscopy was used to determine the chemical bonds and molecular structure.
2022 Advances in Science and Engineering Technology International Conferences (ASET), 2022
Water scarcity has become a challenging issue since it is extremely essential in our daily life. ... more Water scarcity has become a challenging issue since it is extremely essential in our daily life. Lack of pure water in developing countries has marred human life and created various problems related to health, such as diarrhea, cholera, typhoid, dysentery, malaria, jaundice, and waterborne disease; therefore, it is very important that water must be pure and available in abundance amount in all parts of the world. New developments in filtration technology have reinvigorated interest in engineered nanosized materials such as electrospun nanofiber membrane for providing potable water at much lower cost and with minimum investment. Membrane technology has been in use for several decades and has played a crucial role in water treatment. Polymer nanofibers produced via an electrospinning process is an ideal method of fabricating electrospun nanofiber membrane for water filtration. In this research, Nanofibers were produced from two polymers such as polyacrylonitrile (PAN) and polyethylene glycol (PEG), while Dimethylformamide (DMF) was used as a solvent. The electrospun nanofibrous membranes (ENMs) thus produced via electrospinning possess super hydrophilic features and can be used for water filtration. Different water samples such as pond water, jet cutter water, tap water, deionized (DI) water, and carbon black (CB) deionized water were used in this experiment. The water samples were tested for turbidity, total dissolved solids (TDS), electrical conductivity (EC), pH, and refractive index.
2019 Advances in Science and Engineering Technology International Conferences (ASET), 2019
Multiple degrees of freedom (Multi DoF) system modeling from analytical equations is the prelimin... more Multiple degrees of freedom (Multi DoF) system modeling from analytical equations is the preliminary and essential step for mechanical and mechatronics system analysis and design. In general two major approaches are followed – Transfer function and state variable methods. In this paper, a Multi DoF system (4 mass-spring-damper cantilever beam structure) model is formulated using both approaches. The paper serves as an analysis of the step by step procedure for both approaches and a short discussion on fundamental model characteristics. Matlab ® code is utilized to analyze the models. The developed models are discussed from aspects of stability, noise control and disturbance rejection.
2011 World Congress on Sustainable Technologies (WCST), 2011
Lateral vibrations are known to be the most destructive type of vibrations affecting rotary drill... more Lateral vibrations are known to be the most destructive type of vibrations affecting rotary drilling. A whirling drill bit is one of the most prominent outcomes of lateral vibrations. Hence, it is imperative to research methodologies to minimize the drill bit whirl in order to maximize rotary drilling efficiency. Drill bit whirl can be either due to a bend drill string or due to the effect of an unbalanced drill bit. Both the cases lead to an in homogenous borehole which leads to increase in severity of the vibrations. This paper presents an analysis of the controllability of the drill bit whirl in bend drill pipes. Experimental tests conducted are analyzed and presented. The bit whirl due to drill bit bend is discussed as a probable special case of an under actuated system. A few typical under actuated system control issues are presented and the applicability of controllability solutions to the bend drill string whirl problem is discussed.
This applied research topic addresses the potential of integrating a Solar Power Assisted Ground ... more This applied research topic addresses the potential of integrating a Solar Power Assisted Ground Source Heat Pump, for the purpose of space cooling at HCT Fujairah Women's and Fujairah Men's College building(s), United Arab Emirates (UAE). The proposed model is designed such to provide sustainable cooling. A ground source heat pump dependent upon a heat transfer grid of four vertical drilled boreholes of 360-400 feet depth (100-125m) with closed vertical loop constructed of saltwater resistant polyethylene tubing, with thermally enhanced, Bentonite grouted construction, to protect from groundwater contamination, while promoting effective heat transfer between the earth and closed-loop tubes. The system will deploy thermoelectric generators and a nocturnal cooling radiator to dissipate heat from the closed loop. The system is expected to produce a cooling power of about 12 kW at an approximate cost of a solar assisted ground source cooling system of AED 80,000, about $22,000 ...
Qatar Foundation Annual Research Conference Proceedings Volume 2016 Issue 1, 2016
Drill string models are of two major types- Conventional and Periodic. Conventional drill string ... more Drill string models are of two major types- Conventional and Periodic. Conventional drill string models are widely used due to their simplicity in manufacturing and dynamics analysis. Drill strings are affected mainly by torsional, lateral and axial vibrations. The dispersive or propagative nature of these vibrations can only be analyzed by using periodic drill string models. Drill pipe makes up the majority of the drill string. In reality, at each end of the drill pipe, tubular, larger-diameter portions called the tool joints are located. Since the dimensions of the tool joint are negligible when compared to the drill pipe, conventional drill string models assume drill strings to be uniform structures. The tool joints in drill strings introduce a geometrical periodicity in the structure.A periodic structural component is comprised of a repeating array of cells, which are themselves an assembly of elements. The elements may have differing material properties as well as geometric var...
International Journal of Modelling, Identification and Control, 2012
ABSTRACT Conventionally, analytical modelling is used to analyse the dynamics of complex non-line... more ABSTRACT Conventionally, analytical modelling is used to analyse the dynamics of complex non-linear processes. This paper presents identification of mathematical models by the black box modelling method for non-linear systems. The non-linear system concerned in this work is a laboratory prototype of a rotary drilling rig. The system concerned is distinguished for its additive non-linearity at the output end. The step by step analysis of the procedures and criteria used to select an accurate model for a non-linear process by the black box identification method is explained. The model identified in the paper is a Box-Jenkins model. The model selection procedure uses least squares method, pole zero plots and residual analysis. Accurate simulation results with less than 0.05% error are obtained. The identified Box-Jenkins model is validated by a twofold validation procedure.
2019 Advances in Science and Engineering Technology International Conferences (ASET)
This paper presents a traffic management system for foggy conditions. The developed traffic manag... more This paper presents a traffic management system for foggy conditions. The developed traffic management system comprises of a fully automated green energy, fog warning and simultaneous dispersal technology.
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