Current Issue : July - September Volume : 2014 Issue Number : 3 Articles : 4 Articles
This paper starts with an overview of vehicular ad hoc networks (VANETs) and their characteristics. Then this paper reviews diverse\napplications ofVANETs and the requirements of these applications. In addition it reviewsVANETs standards, different broadcasting\npresented in a variety of studies, and also associated issues with data dissemination in connected and fragmented vehicular networks\nto solve broadcast storm problem and temporary disconnected VANETs. The discussion will be about the encountered challenges\nand presented solutions with respect to the related issues, based on the literature and strength and weakness of each protocol....
In the field of intelligent transportation system (ITS), automatic interpretation of a driver�s behavior is an urgent and challenging\ntopic. This paper studies vision-based driving posture recognition in the human action recognition framework. A driving action\ndataset was prepared by a side-mounted camera looking at a driver�s left profile.The driving actions, including operating the shift\nlever, talking on a cell phone, eating, and smoking, are first decomposed into a number of predefined action primitives, that is,\ninteraction with shift lever, operating the shift lever, interaction with head, and interaction with dashboard. A global grid-based\nrepresentation for the action primitives was emphasized, which first generate the silhouette shape from motion history image,\nfollowed by application of the pyramid histogram of oriented gradients (PHOG) for more discriminating characterization. The\nrandomforest (RF) classifier was then exploited to classify the action primitives together with comparisons to some other commonly\napplied classifiers such as ??NN, multiple layer perceptron, and support vector machine. Classification accuracy is over 94% for the\nRF classifier in holdout and cross-validation experiments on the four manually decomposed driving actions....
This paper is on the design of a parameter space based robust PID steering controller. This controller is used for automated steering\nin automated path following of a midsized sedan. Linear and nonlinear models of this midsized sedan are presented in the paper.\nExperimental results are used to validate the longitudinal and lateral dynamic models of this vehicle.This paper is on automated\nsteering control and concentrates on the lateral direction of motion.The linear model is used to design a PID steering controller\nin parameter space that satisfies ??-stability.The PID steering controller that is designed is used in a simulation study to illustrate\nthe effectiveness of the proposed method. Simulation results for a circular trajectory and for a curved trajectory are presented and\ndiscussed in detail. This study is part of a larger research effort aimed at implementing highly automated driving in a midsized\nsedan....
For the stability control and slowing down the vehicle to a safe speed after tire failure, an emergency automatic braking system\nwith independent intellectual property is developed. After the system has received a signal of tire blowout, the automatic braking\nmode of the vehicle is determined according to the position of the failure tire and the motion state of vehicle, and a control strategy\nfor resisting tire blowout additional yaw torque and deceleration is designed to slow down vehicle to a safe speed in an expected\ntrajectory. The simulating test system is also designed, and the testing results show that the vehicle can be quickly stabilized and\nkept in the original track after tire blowout with the emergency braking system described in the paper....
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