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In order to improve the energy efficiency of intelligent vehicle equipped with drive-by-wire system and braking safety. The mechanical and electric braking system of intelligent vehicle is analyzed by the theory of vehicle braking stability. Considering the characteristics of electric power generation, a regenerative braking control strategy is proposed, which can effectively distribute the braking...
An obstacles detection method based on the date clustering and information fusion of millimetre-wave radar and the camera in real traffic scenarios is proposed in this paper. The ROI (region of interest) established from millimetre-wave radar through data processing can be transformed into the image coordinate by multiplying perspective transform matrix derived from the co-calibration between millimetre-wave...
Global coordinate, absolute coordinate and local vehicle coordinate to describe the vehicle running states were established respectively, and relationship among state parameters in different coordinates was studied. Seven degree-of-freedom (DOF) vehicle model was set up to be used for dynamic estimation based on extended Kalman filter (EKF). Fusion estimation based on correction of global information...
A new collision avoidance strategy for an autonomous emergency braking system is proposed in this paper. The risk assessment model on the emergency braking behavior of driver in real traffic scenarios is developed. A collision avoidance strategy with two levels of warning and two levels of braking intensity is proposed according to the driver response, decision and operation time. Simulation model...
A vehicle motion state estimation model is established based on the millimetre wave radar. The system noise and observation noise are considered and the Kalman filtering algorithm is adopted to estimate the relative distance, relative velocity and relative acceleration of the front vehicle or obstacles. The collision risk model based on the improved TTC (time-to-collision) is established according...
Evaluation of the distribution network's reliability with the consideration of the impacts of prearranged power failure is studied in the paper. Prearranged power failure are classified into two types according to their natures and each of them is modeled to predict its failure rates for distribution network reliability evaluation. Prearranged power failure due to power component maintenance is modeled...
An 8-DOF(degrees-of-freedom) nonlinear dynamic model of a spiral bevel gear pair which involves time- varying mess stiffness, transmission error, backlash and asymmetric mesh stiffness is established. The effect of the asymmetric mesh stiffness on vibration of spiral bevel gear transmission system is studied deliberately with numerical method. The results show that the mesh stiffness for drive side...
This paper presents a context-aware infrastructure for the easy creation and flexible deployment of the context aware application. We introduce the concept of plane in this infrastructure to manage the sensors which are distributed in the communication environment and used to collect the specific context information. A layered structure of the context information is designed based on this infrastructure...
Our objective is to build a distributed terminal system to provide smart, context-aware, rich-experienced applications upon personal environment networking technologies, such as WLAN, IEEE 802.15.3 series, ZigBee, Bluetooth, etc. For the proliferation of smart devices with autonomous applications, the users can get much more service experiences than before. While smart devices facilitate human operation,...
In this article we present a perspective on future vision of mobile communications and services which is referred to as Mobile Ubiquitous Service Environment (MUSE). Based on analysis of wireless communications and services, we exploit a conceptual model for MUSE via a top-down approach. The conceptual model consists of three major elements: Terminal Service Environment (TSE), Network Service Environment...
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