|Title: Image Based Modeling Technique for Pavement Distress surveys: a Specific Application to Rutting|
|Author(s): L. L. Inzerillo, G. Di Mino, S. Bressi, F. Di Paola, S. Noto|
|Pages: 1-9||Paper ID:163705-2929-IJET-IJENS||Published:October, 2016|
Abstract: Image-based modeling (IBM) is a well-known technique to obtain high quality 3D models based on multi view images. IBM started being used in several applications such as inspection, identification of objects and visualization, due to the user-friendly approach, the low cost and highly automated technique. This paper focuses on the investigation of the potential application of IBM in the diagnosis of road pavement distresses and in particular rutting. Indeed, the evaluation of the rutting distress is a fundamental step to define the whole state of a pavement as demonstrated by the calculation of Present Serviceability Index (PSI). Currently, the permanent deformation is measured monitoring visually the rut depth with the approximations that this procedure involves. Nevertheless, the exact measure of the rut depth is necessary to evaluate precisely the cause and the severity of this distress and be effective in the maintenance and rehabilitation of the pavement structure. The objective of this study is to apply the IBM technique on a laboratory rutted sample, in order to verify the accuracy of the method in determining the rut depth. To achieve this, a comparison has been made between the 3D model obtained with IBM and the one obtained with blue led 3D scan (Artec Spider) of the same rutted asphalt concrete. The metric accuracy of the model is then defined and its validity is assessed, in terms of distress diagnosis. Using the IBM it is possible to obtain three-dimensional digital models with accuracy higher than with the traditional monitoring. Therefore, the higher control on the distresses may lead to an improvement of the road pavement management, which addresses the challenge to improve the overall quality of the transportation system.
|Keywords: Accuracy, distress, Image-based modeling, rutting, survey.|
|Full Text (.pdf) | 826 KB|
|Title: Analysis on Controlled Rectifier to Determine the Minimum Limit of Load Resistance for Proper Voltage Regulation|
|Author(s): A. Mohammad, S. A. M. Shah Ul Amin, A. Mahmud, R. Ahmed, Md. Rokib Hasan, Al-Imran, Md. Ferdous Abedin|
|Pages: 10-15||Paper ID:162905-5151-IJET-IJENS||Published:October, 2016|
Abstract: Existence of source resistance plays a major impact on the voltage regulation of a controlled rectifier. Based on the fact necessary mathematical equations have been derived to find out the minimum limit of electrical load resistance for which voltage regulation is only possible. Below that resistance, no control system can regulate the output voltage of the converter. In addition, it can be used to define the maximum power which will be crucial to know for designing a regulated power supply. Hence, to design a closed loop control system for voltage regulation this solution is useful.
|Keywords: Controlled rectifier; voltage regulation; source resistance; regulated converter; voltage gain.|
|Full Text (.pdf) | 472 KB|
|Title: Simulation of Single-Axis Force Stabilizer Behavior in Open Loop and Closed Loop Conditions According to its Equations of Motion|
|Author(s): Mohammad Sadegh Mirzajani Darestani|
|Pages: 16-24||Paper ID:165105-4141-IJET-IJENS||Published:October, 2016|
Abstract: Stable platforms with different degrees of freedom (DOF) have numerous applications in industry and trade, such as in aerospace, astronomy and robotics. The advantage of these platforms is the sustainability of their behavior and performance under different environmental and work conditions. Different types of equipments like imaging systems are placed in them as a load to have stable behavior. Stable platforms with different DOF are either of the force or indicator stabilization types. The present study offers an overview of the structure and function of single axis force stabilizers and analyzes the dynamic and kinematic equations governing them. The behavior and performance of the target platform in open loop and closed loop conditions is simulated in MATLAB/SIMULINK using these equations and the characteristics of existing gyroscopic single axis force stabilizer. In open loop mode, the performance of the system under 11.5O/sec angular velocity of body is evaluated. In closed loop mode, system response is evaluated under the influence of an external sinusoidal wave with an amplitude of 0.3 Newton meters torque which is applied around the stability axis of the stable platform. The simulation result shows the consistency of the simulation results with the actual behavior of the platform under the same working conditions.
|Keywords: Force stabilizer, gyroscope, indicator stabilizer, simulation.|
|Full Text (.pdf) | 725 KB|
|Title: Effect of Fuel Magnetism on Industrial Oil Burner Performance Burning Waste Cooking Oil|
|Author(s): M. S. Gad, Ahmed El fatih Farrag|
|Pages: 25-37||Paper ID:167605-3939-IJET-IJENS||Published:October, 2016|
Abstract: Due to continuous consumption, depletion, increasing energy demand and harmful exhaust gases of fossil fuels in transportation and power generation, all these led to search about alternative fuels. Waste cooking oil is considered a new alternative fuel with lower price and solved the problem of getting rid of it. The chemical and physical properties of waste cooking oil were measured and analyzed according to ASTM standards. Waste cooking oil was preheated to 90°C before oil nozzle. A magnetic field was applied to the fuel line to magnetize the fuel before the burner. The magnetic field used in this study is coming from a permanent magnet of 4000 Gauss. Performance, exhaust emissions and combustion characteristics comparative study of a swirled oil burner burning diesel and waste cooking oil was done. Applying the magnetic field to fuel line decreased fuel consumption by 21 and 22 % for waste cooking and diesel oils, respectively. Exhaust gas temperatures for diesel and waste cooking oils decreased under fuel magnet effect. There were improvements in combustion efficiency by 8 and 12 % for diesel and waste cooking oils, respectively. There were decreases in CO2 by 28 and 31%, HC by 29 and 25 %, CO by 30 and 37% for diesel and waste cooking oils, respectively under magnetic field. Increases in NOx emissions by 40 and 48% and oxygen concentration by 21 and 12% for diesel and waste cooking oils, respectively were shown with the effect of fuel magnet. There were decreases in radial inflame temperatures distributions by the effect of magnetic field on diesel and waste cooking oils.
|Keywords: Oil burner, Waste cooking oil, Magnet, Inflame temperature, Combustor, Exhaust emissions.|
|Full Text (.pdf) | 804 KB|