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To respond to emergencies in a fast and an effective manner, it is of critical importance to have efficient evacuation plans that lead to minimum road congestions. Although emergency evacuation systems have been studied in the past, the existing approaches, mostly based on multi-objective optimizations, are not scalable enough when involve numerous time varying parameters, such as traffic volume,...
Low frequency longitudinal vibration of the vehicle is one of the key factors affecting the drivability of the vehicle, therefore the mechanism analysis and control of the vehicle longitudinal low frequency vibration have been a hot topic in vehicle NVH field. There have been a lot of conclusions about low frequency longitudinal oscillation and resonance vibration of the vehicle as long as related...
An integrated powertrain control model is built in Simulink/Stateflow in this paper. This control model is transformed in Targetlink to conduct the model-in-the-loop(MIL) simulation and software-in-the-loop(SIL) simulation. By combining the C code generated after SIL with the underlying code of the single chip, the control procedure is finished. By downloading the code into the hardware, the hardware...
Based on deduced kinetics relations between the locations of four wheels and the mass center of sprung mass under the influence of vertical and lateral tire forces, a four-wheels-independent-vibration absorbing (4WIV) vehicle was presented. Consider the traditional car model with fifteen degree of freedoms could be acted as a combination of four independent controllable quarter vehicle systems, a...
To reduce the turnaround time of a vessel in a container terminal, the performance of automated guided vehicles (AGVs) which carry on the transportation of containers between quayside and yard is crucial. A good dispatching strategy for AGVs should be able to minimize the waiting or idle time of the quay cranes by assigning vehicles to loading or unloading jobs with a minimum total delay time. The...
Two optimal algorithms, MTA∗ and MT-RBA∗, are presented to find the optimal yard crane (YC) job sequence for serving a fleet of vehicles for delivery and pickup jobs with scheduled deadlines and predicted vehicle arrival times. The objective is to minimize the total tardiness of incoming vehicle jobs. This is important for minimizing vessel turnaround time. In the search for an optimal job sequence,...
A regenerative braking system, which could restore kinetic energy and potential energy to a battery or any other forms of power during braking, is a special system for electric and hybrid electric vehicles. However, the large current produced by the generator during braking would affect battery performance and shorten battery life. A hybrid-power system is an excellent energy storage system, in which...
Yard Crane (YC) deployment in a multi-berth terminal is a very complex problem. The total amount of work to the entire terminal yard changes dynamically over time. The levels of workload to different parts of the yard also vary greatly and change over time. So the YC deployment algorithm plays a critical role in increasing YC productivity and reducing vehicle waiting times in the yard. This paper...
The problem of yard crane dispatching in container terminals is addressed in this paper. We proposed two new hybrid algorithms which combine the advantages of A* heuristic search and Recursive Backtracking with prioritized search order to accelerate the solution process. The algorithms proposed use real time data-driven simulation to accurately predict the time taken by the yard crane in performing...
We address the problem of dispatching a yard crane in its appointed zone of a container terminal. The objective of yard crane dispatching is to determine a sequence for handling all coming jobs within the zone that minimizes the average vehicle waiting time. We propose 2 modified A* search algorithms with admissible heuristics to provide fast and optimal dispatching solution. Simulation results show...
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