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With the rapid development of electronic commerce and logistics distribution, multi-depot vehicle routing problem with time windows (MDVRPTW) as influencing electronic commerce more step development, has been paid more attentions. According to the characteristics of model, hybrid heuristic algorithm is used to get the optimization solution. First of all, use hybrid coding so as to simplify the problem,...
In allusion to the current traffic monitoring, driver skill examination and other requirements, the algorithm of vehicles trajectory extraction based on video image sequences is proposed. First, based on researching the characteristic of road images, this algorithm has used multi-objective optimization technique to improve feature point matching mechanism based on Euclidean distance, which used after...
In this paper, we propose a tree-based adaptive broadcasting (TAB) algorithm for data dissemination to improve data access efficiency in vehicle communications. The proposed TAB algorithm first constructs a broadcast tree to determine the broadcast frequency of each data, and splits the broadcast tree into some broadcast wood to generate the broadcast program. In addition, this paper develops an analytical...
The plug-in hybrid electric vehicle (PHEV) with vehicle-to-grid (V2G) capability is becoming increasingly popular and can be expected to deploy in a large scale. According to the estimation of PHEV penetration degree and the charging characteristics, the modeling of distribution grid with extra load of PHEV charging is formulated first. The PHEVs plugged into the grid, when aggregated in a considerable...
In order to lead properly an electric vehicle project, it is very important to assess and optimize the driver perception during manoeuvres such as tip-in and tip-out. This aspect of vehicle customer perception is called “drivability”. Precedents papers have shown that the motor block (i.e. electric motor and speed reducer) rolling motion onto its mounting blocks has an important effect on the drivability...
The problem of navigation in a spatially variable current is reviewed, and for a certain class of mathematically-describable functions, solved for minimum time in closed form.
The Buckeye Bullet 2 is the world's fastest hydrogen fuel cell electric vehicle, with a certified FIA record of 487.433 km/hr (302.877 mi/hr). This paper provides the basic details of the overall vehicle and focuses on the design, testing, and optimization of the propulsion system. A unique fuel cell system was designed, tested, and integrated to produce over 500 kW of power, more than twice of its...
Permanent magnet synchronous motor (PMSM) drives are increasingly considered in vehicular applications due to relatively high power density, negligible rotor losses, high efficiency, ease of control, and maintenance. In this paper a new method of fault detection and treatment for 5-phase PMSM under static rotor eccentricity has been introduced. As the optimum performance is of great importance in...
Traffic signals are the main devices for controlling traffic to guarantee the safe crossing of opposing streams of vehicles and pedestrians. In this study, a simple cycle and split optimization method is developed for isolated intersections. The split optimization is based on the notion of minimizing delay per cycle while cycle length is adjusted according to the residual queues at the end of the...
Traffic signals have become an invaluable tool in ensuring smooth flow of motor vehicles at intersections. But where we gain in terms of orderly flow of traffic, we lose out in fuel wastage and pollution. This is because people often leave the engine of their vehicle running while waiting at signals. In this paper, we propose a system that targets this problem. By creating a channel of communication...
With the announcement of the “Stadtpilot”- Project the Technische Universität Braunschweig has accepted the challenge of guiding a vehicle fully autonomously in the complex environment of Braunschweig's entire ring road. Autonomous driving on this two-lane urban road includes interaction with traffic, behavior at intersections, lane change maneuvers at speeds up to 60 km/h as well as merging into...
A hierarchical multiobjective model based predictive control approach is presented for solving a dynamic pickup and delivery problem. The hierarchical multilayer structure of the system is used to decompose the optimization problem into smaller but more tractable subproblems. In the bottom layer, the dispatcher (re)routes the vehicles when a new request appears, and minimizes user and operator costs...
A scientific and effective evacuation plan plays an important role in improving the event reaction ability of the urban traffic system. Many unpredictable natural or man-made disasters result in no-notice evacuation events. This type evacuation has a main trait different with tradition hurricane evacuation and no time to evacuate by their cars. Such specific characteristics of the no-notice evacuation...
As electric and hybrid electric vehicles are making their appearance on the automotive market, developers in the agricultural machinery and heavy equipment industry are working on the introduction of hybrid drives as well. This paper investigates the potential of a fuel cell hybrid drive train for agricultural tractors. It deals with the modeling and the energy flux optimization in order to increase...
In this paper a novel method called Sampling-Based Model Predictive Control (SBMPC) is proposed as an efficient MPC algorithm to generate control inputs and system trajectories. The algorithm combines the benefits of sampling-based motion planning with MPC while avoiding some of the major pitfalls facing both traditional sampling-based planning algorithms and traditional MPC. The method is based on...
The project "Bizzarrini P538 Eco Targa" has been developed by the INFOCOM department of " Sapienza" University of Rome. The project consisted in the design and construction of a replica of a historic Italian car, updated with LPG fuel and with modern parallel hybrid-type plug-in technologies, with a start and stop system, and a Lithiumpolymer battery storage system. The research...
Improvement in braking performance and vehicle stability can be achieved through the use of braking systems whose brake force distribution is variable. Electronic braking force distribution has an important and serious role in the vehicle stopping distance and stability. In this paper a new approach will be presented to achieve the braking force distribution strategy for articulated vehicles. For...
Connectivity is a fundamental requirement in the planning, design and evaluation of vehicular ad hoc networks (VANET). In this paper, we propose a new equivalent speed parameter and develop an analytical model to explain the effect of vehicle mobility on the connectivity of highway segments in a VANET. We prove that the equivalent speed is different from the average vehicle speed and it decreases...
The decision of an electrical revolution in the automotive sector has been decided at the end of 2008, when the European Parliament passed legislation of lower CO2 emissions of new cars. This causes and forces the development of alternative concepts of propulsion systems and alternative fuels. These new trends of propulsion technologies like hybrid and pure electric drive will have impact on the entire...
This paper addresses both path tracking and local trajectory generation for autonomous ground vehicles. An optimisation based two-level control framework is proposed for this task. The high-level control operates in a receding horizon fashion by taking into account real-time sensory information. It generates a feasible trajectory satisfying the nonlinear vehicle model and various constraints, and...
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