Current Issue : October - December Volume : 2020 Issue Number : 4 Articles : 5 Articles
One important objective of urban traffic signal control is to reduce individual delay and improve safety for travelers in both private\ncar and public bus transit. To achieve signal control optimization from the perspective of all users, this paper proposes a platoonbased\nadaptive signal control (PASC) strategy to provide multimodal signal control based on the online connected vehicle (CV)\ninformation. By introducing unified phase precedence constraints, PASC strategy is not restricted by fixed cycle length and offsets.\nA mixed-integer linear programming (MILP) model is proposed to optimize signal timings in a real-time manner, with platoon\narrival and discharge dynamics at stop line modeled as constraints. Based on the individual passenger occupancy, the objective\nfunction aims at minimizing total personal delay for both buses and automobiles. With the communication between signals, PASC\nachieves to provide implicit coordination for the signalized arterials. Simulation results by VISSIM microsimulation indicate that\nPASC model successfully reduces around 40% bus passenger delay and 10% automobile delay, respectively, compared with signal\ntimings optimized by SYNCHRO. Results from sensitivity analysis demonstrate that the model performance is not sensitive to the\nnumber fluctuation of bus passengers, and the requested CV penetration rate range is around 20% for the implementation....
The current paper presents an inclusive survey about the AC to DC and DC to DC\nconverters for brushed DC Motor Drives. An essential number of different AC to DC and DC to\nDC topologies and control techniques, applied on the brushed DC motor drives are presented. This\nextensive literature review exposes advantages, disadvantages and limitations besides giving the\nbasic operating principles of various topologies and control techniques....
The increase in demand for thermoplastics as a light-weight material for automobile application and other commercial purposes\nprompts more research into the available polymer resources. In this research, the possibility of enhancing the performance of\nrecycled waste plastics (RWP) as polymer-based composites was examined. Particulate snail shell was obtained by grounding and\nsieving snail shells to obtain..................
In order to improve fuel economy and enhance operating efficiency of fuel cell hybrid\nvehicles (FCHVs), fuzzy logic control (FLC) strategies are available and suggested for adoption.\nIn this paper, the powertrain of a fuel cell hybrid vehicle is designed and the parameters of the\nmotor, battery, and fuel cell are calculated. The FLC strategy and the power following control\n(PFC) strategy are designed for the studied FCHV. A secondary development for Advanced Vehicle\nSimulator (ADVISOR) is implemented based on the standard driving cycles, and a Chinese typical\ncity driving cycle is imported. Simulation results demonstrate that the proposed FLC strategy is\nmore valid and reasonable than the traditional PFC strategy. The proposed FLC strategy affects the\nvehicle characteristics significantly and contributes to better performance in four aspects: fuel economy,\nefficiency of battery and fuel cell system, battery state of charge (SOC), and battery life. Hence, the FLC\nstrategy is more suitable for the energy management strategy for fuel cell and battery hybrid vehicles....
The aluminum silent block is the part that connects the front suspension mounting and the road wheels. These products are used\nin high-speed cars and are subject to high engineering stresses. Over time, fractures occur in the connection part of these products\ndue to insufficient strength. These problems are related to production metallurgy, which led to the concept of this study. During\nmass production, these parts are manufactured using the aluminum extrusion method. In this study, a rapid cooling process using\nwater was applied, with the aim of improving the mechanical properties of the connecting part exposed to high dynamic loads.\nSamples were taken from the regions of these products which differed in thickness and width, and microhardness and tensile tests\nwere performed for each region. The effects of both the extrusion cooling rate and the regional flash cooling on the material\nproperties were then characterized. As a result of the isothermal transformation, the grain size in the microstructure of the\nmaterial had shrunk. According to the findings, in this type of production, an average increase in strength of 25% was observed in\nthe parts of the material subjected to maximum stress. The stress and safety coefficient values were found using finite element\nanalysis, and curves were then drawn showing the differences in the safety coefficient values from the different points. As a result of\ncooperation between university and industry, the material and mechanical properties of an automobile part were improved in this\nstudy. This research has shown that, in terms of the accuracy of the results, it is very important to consider the variations in\ndifferent regions of the product when defining the mechanical properties of any material produced by applying casting, heat\ntreatment, and plastic forming methods....
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