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Vehicle Electronics Conference, 2001. IVEC 2001. Proceedings of the IEEE International

Date 25-28 Sept. 2001

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Displaying Results 1 - 25 of 49
  • IVEC2001. Proceedings of the IEEE International Vehicle Electronics Conference 2001. IVEC 2001 (Cat. No.01EX522)

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    Freely Available from IEEE
  • Author index

    Page(s): 266
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    Freely Available from IEEE
  • EV sharing second car system with ITS technologies in residential area

    Page(s): 181 - 186
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (594 KB) |  | HTML iconHTML  

    EV sharing second car system provides convenient mobility using eco-friendly EVs for residents who have usually no access to their first car. The operations center system manages reservation of vehicle use and vehicles operation. The in-vehicle system receives user's information from the center system, and authenticates user's identity to unlock the doors of vehicle. ITS technologies make possible unmanned rental/return operation of vehicles, monitoring vehicle states from the operations center, and supporting a user during the rental. In a field trial of this system, EVs were used with short duration and short mileage on the average, so EVs can be used as "second cars" in a residential area View full abstract»

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  • Virtual component co-design-applying function architecture co-design to automotive applications

    Page(s): 221 - 226
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (749 KB) |  | HTML iconHTML  

    System design is moving from a trial-and-error manual process towards a more rigorous and tool-supported approach. The driving function for this move is the need to develop new products quickly, correctly and inexpensively. Time-to-market of four to six months are not uncommon today for some electronic systems. At the same time, there is a need to leverage maximally what deep sub-micron (DSM) technology has to offer to compete. Hence, an approach that has design re-use as its main goal has great potential to increase productivity of the industry as a whole. The basic tenets of the design methodology have been incorporated into the Cadence VCC environment for virtual component co-design. They are function-architecture co-design, mapping of functions to flexible and programmable architectures, and efficient and automatic implementation of actual code on the programmable components of the architecture. This paper illustrates these principles using the automotive applications as an example. Besides the different steps of the actual function architecture codesign methodology, the authors show and summarize the lessons learned from design projects. They outline how it has been possible to capture functions and candidate architectures and how the mapping of the functions to the candidate architectures can be carried out very quickly so as to converge to an "optimal" solution effectively and in a few iterations View full abstract»

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  • A sideways-looking radar for inter-vehicle communication: DEMO2000

    Page(s): 193 - 196
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (400 KB) |  | HTML iconHTML  

    This paper describes the contribution for co-ordinate traveling of a group of vehicles on the highway with sharing the information of relative position data collected by the sideways-looking radar. Sharing all of the relevant driving information from the sideways-looking radar with other vehicles in the vicinity, an extensive range of detective measurement can be taken than that from a single vehicle that installs a sideways-looking radar. It also introduces experimental data on distance and velocity as a relative position measurement function resulting from the sideways-looking radar system View full abstract»

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  • Experimental evaluation of charge laws for road vehicle batteries

    Page(s): 17 - 20
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (439 KB) |  | HTML iconHTML  

    The efficiency of electric road vehicles is heavily dependent on electrochemical battery characteristics and performance. In the paper, charge and recharge laws are analysed by means of a model of a battery that is proposed to represent the battery behaviour. In the paper are presented some experimental results, in order to evaluate the battery's ability to recover energy during braking operation. The proposed model is validated through tests realized on a workbench which has been constructed in the Laboratory of the University of Naples. The main characteristics of the workbench are evidenced in the paper. Experimental data coming from testing procedures realized by the University of Naples are analysed and compared to data collected on the road during the activity done within the ATENA Research Project View full abstract»

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  • Feed forward FLC for PMSM drives

    Page(s): 21 - 26
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (427 KB) |  | HTML iconHTML  

    By the development of new magnetic materials the PMSM allows a considerable reduction in motor size, and consequently inertia with valuable increase in specific power and torque. These advantages coupled with the availability of appropriate power electronics devices has resulted in widespread adoption of the PMSM for applications in machine tools,robotics, and disk drives. Other drives are used in automation applications and in electrical vehicles. Fuzzy logic has been developed over the last 30 years. Fuzzy control has boomed in applications in industry since 1987 and electrical appliances since 1990. Nowadays, many scientists construct more efficient systems using fuzzy control. The control of PMSM using fuzzy logic control (FLC) is presented in this article. FLC structure is shown for application to an electric vehicle (EV), PMSM performance is shown using FLC View full abstract»

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  • Obstacle detection algorithms with dealing with vagueness of sensing signals

    Page(s): 163 - 168
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (565 KB) |  | HTML iconHTML  

    This paper presents the new method to deal with both range data and image data with data vagueness in sensor fusion process. Using laser range finder in this study, range data and image data are obtained. In our method, comparing range data and road model without any obstacles, the possibility index of obstacle existence is defined. Sensor fusion both range data and image data are carried out considering data vagueness. The method is tested by real data and evaluated View full abstract»

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  • A research on gear position decision and combination control in braking condition

    Page(s): 227 - 231
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (380 KB) |  | HTML iconHTML  

    In braking conditions, the clutch and transmission control of automated mechanical transmission (AMT) system is different from that in the natural condition. This paper analyzes the reasons that causes driver's braking operation, concludes the characteristics of automatic operating of power-train and sets down the rules of gear position decision and the combination control of AMT in this condition View full abstract»

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  • Real-time optimization control for parking a vehicle automatically

    Page(s): 97 - 102
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    The automatic operation technology of vehicles is of considerable practical concern. In this paper, we apply a real-time optimization technique to a control system for parking a vehicle automatically. In the technique the efficiency of the control system depends on weight matrices of a cost function; we propose a method for changing the weight matrices in order to realize a switching operation. This switching operation is a kind of parking motion in which a vehicle goes forward to a target at first, and then turns to the right or the left; it then approaches the target again with backward motion. This operation is often necessary in a narrow space. Simulation results show that suitable selections of a cost function and its weight matrices accomplish the switching operation without determining the switching point beforehand View full abstract»

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  • Variable structure control of electronic throttle valve

    Page(s): 103 - 108
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (505 KB) |  | HTML iconHTML  

    The use of an electronic controlled throttle valve can increase the efficiency and performance of an engine since the control of the throttle valve, which is determined according to the desired amount of air flow calculated from the desired speed and engine torque, is independent from the position of the accelerator. In this paper, a variable structure (VS) controller is designed for the electronic throttle valve. The model of the electronic throttle valve is discussed at first. Then the VS controller is proposed by using the backstepping approach. Finally, simulation and experimental results are given View full abstract»

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  • Inverter miniaturizing technologies for EV/HEV applications

    Page(s): 261 - 264
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (413 KB) |  | HTML iconHTML  

    In this paper, an integrated intelligent power drive unit (IPU) is introduced as the next generation electric power module and inverter for EV/HEV. The IPU designs are based on new concepts to achieve a very compact overall structure, high reliability, high functionality and high efficiency. At first, the technologies to miniaturize the inverter are introduced and the benchmarks between the current inverter system using IPM (intelligent power module) and using IPU are shown. Finally, to verify the validity of IPU design, experimental data are shown View full abstract»

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  • Displaying method adapted to visual acuity and brightness under viewing environment

    Page(s): 37 - 42
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (406 KB) |  | HTML iconHTML  

    The given time to gaze at an on-board display is very short from the viewpoint of safe driving. Therefore, the visibility of the on-board display should be more excellent than the general display. This report describes a method for improving display visibility. In this method, character size is decided, based on the spatial frequency properties, and the brightness of the display screen is selected using the adaptation properties. In the decision of character size, the two-dimensional frequency of the character (linear density) is calculated. Next, appropriate character size is determined from correspondence of this frequency and the spatial frequency (visual acuity). In a car-navigation display under low illuminance at night-time, the background luminance of the display screen is decided by the adaptation properties. Besides that, the character luminance is determined by the appropriate contrast with the background. Some experiments have shown that these methods were very effective in improving the display visibility View full abstract»

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  • Development of an electrical control VVT system for high speed SI engines

    Page(s): 115 - 119
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    A newly developed electrical control variable valve timing (VVT) system is presented which is applied by changing the intake valve closing timing based on the variable working position extender. It has some advantages such as its simple structure, little modification for the engine, easy installation and low cost etc. The test results show that the engine performance is modified distinctly, such as the torque at low speed, the output power at high speed, the fuel economy and the emission in some conditions. This VVT system is suitable for use in the high-speed automotive engines with double overhead cam (DOHC) View full abstract»

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  • A feasibility study on EV-sharing application to residential area and its characteristics

    Page(s): 169 - 174
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (636 KB) |  | HTML iconHTML  

    Car sharing has currently become widely adopted throughout Western Europe and North America according to the unique strengths of being an alternative means of transport in reducing number of car ownership, traffic congestion, parking spaces and environmental impacts. However, if this new mobility is applied in a developing city, particularly, Bangkok residential area where traffic and environmental situation are critical, what factors would it need in order to arrive at the success of car sharing application? The aim of this paper is to find whether or not there is the feasibility to apply electric vehicle sharing in Bangkok residential area View full abstract»

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  • Efficient solar power equipment for electric vehicles: improvement of energy conversion efficiency for charging electric vehicles

    Page(s): 11 - 16
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (722 KB) |  | HTML iconHTML  

    Electric vehicles usually need a battery which has been charged by external electrical power stations. This is in some cases a serious burden for wide spread use. In this paper, we have proposed the most feasible solar power generation system mounted on the electrical vehicles to charge smart battery during running. In our experiments, about 700 W to 800 W electrical power is supplied on a usual daytime, which is about 2 times of conventional power level. We have also proposed two kinds of efficiency tracking system for electrical vehicles use, one is the feedforward type which sets a new condition point according to the change of energy (this is called QF1-method), the other is the robust efficiency tracking climbing method (QF2 method). Finally, experimental results have shown the effectiveness of our proposal View full abstract»

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  • Vehicle distinction using laser radar system

    Page(s): 157 - 162
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (505 KB) |  | HTML iconHTML  

    This paper describes the laser radar system that combines a laser distance meter and pan-tilt equipment. We propose an algorithm for calculating reflection points of laser beam. Moreover, we propose a vehicle distinction method using characteristics of vehicle shapes. We used this system to undertake an experiment in which we measured stationary vehicles. We successfully detected where the car is parked in a second when the parking area consists of ten lots. We modeled the typical shapes of cars, and classified measured data of actual cars View full abstract»

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  • Dynamics control of large vehicles for rollover prevention

    Page(s): 85 - 89
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (398 KB) |  | HTML iconHTML  

    Rollover of large-size vehicles could cause serious accidents for motorists. In this paper, various dynamic outputs such as the lateral acceleration and roll angle for predicting rollover are explored using computer simulations, to determine the most effective indicator of the impeding danger so that it can be predicted and eventually controlled and prevented. Factors such as the varying center-of-gravity height and torsional stiffness of the chassis are taken into consideration to account for unique properties of large-size vehicles, as opposed to smaller passenger cars View full abstract»

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  • Automatic visual searching and reading of barcodes in 3-D scene

    Page(s): 49 - 54
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (878 KB) |  | HTML iconHTML  

    Automatic finding and reading barcodes in 3D scene has wide demands. The key problem is to search barcodes and supply them to a reading subsystem. In the previous papers (see IEEE Trans. PAMI, vol.22, no.2, p.179-90, 2000, and vol.22, no.3, p.252-65, 2000), we proposed a method of "feature extraction after categorization and projection" for edges, ridges, corners, and vertices. The categorization is based on uni- and omnidirectionality of significant local variation. In this paper, we describe an extension of this method that is more efficient to detailed images with closely spaced features like barcodes. Defining a barcode region with these features, we describe an application of it to extraction and reading of barcodes in 3-D scene View full abstract»

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  • A dynamic model of engine using neural network description

    Page(s): 109 - 114
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (438 KB) |  | HTML iconHTML  

    Automotive engines frequently run under dynamic conditions. Due to the inner complex physical and chemical changes in the course of engine operation, the precision of model obtained by means of mechanism modeling or curve approximation is limited. To meet the requirement of making automatic shift schedule, in this paper the determinant factors of dynamic characteristics of an engine are analyzed, the dynamic test of the Santana 2000 EFI engine is completed, and the dynamic model of the engine based on neural network identification is built through the learning of a great deal of test data, which leads the optimal match of the cooperation between the engine and powertrain system into reality View full abstract»

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  • ITS and the environment: towards a concept of subjective transportation

    Page(s): 1 - 3
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    In this paper, the authors discuss the effects of intelligent transportation systems on both the local environment for humans in transportation, and the global environmental effects: city sprawl; pollution; and the distribution of comfort. The paper addresses four subtopics: how much transportation is needed; the smart cockpit; sharing the driving experience; and distributed decision making View full abstract»

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  • An overview on energy conservation in automobile traffic and transportation with ITS

    Page(s): 137 - 142
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (622 KB) |  | HTML iconHTML  

    This paper surveys the effects of intelligent transport systems (ITS) on energy conservation. ITS could improve traffic flow to prevent congestion, leading to energy conservation. Traffic signal control systems enable automobiles to go through intersections without stopping, and electronic toll collection systems eliminate stopping at tollgates. With route guidance systems, drivers can reach their destinations along the optimal routes. Vehicle control systems increase the effective road capacity by shortening the inter-vehicle gap and lane width. The effects of ITS on energy conservation are expected to be a 13 % decrease in fuel consumption in the year 2025 in Japan View full abstract»

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  • Investigation of automatic path tracking control using four-wheel steering vehicle

    Page(s): 73 - 77
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (455 KB) |  | HTML iconHTML  

    This paper investigates the use of a four-wheel steering system for the control of a vehicle, in the context of automatic path tracking. A four-wheel steering system provides two independent control inputs which can significantly enhance handling and stability. In this paper, the lateral deviation at the front and rear virtual points are proposed to be state variables in the control system design procedure instead of lateral deviation at the center of gravity and yaw deviation in order to decouple lateral and yaw motion during path tracking maneuvers. Simulations of straight and curved path tracking are conducted to investigate the validity of the proposed control system View full abstract»

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  • Image acquisition method with wide dynamic range of moving objects for ITS

    Page(s): 187 - 192
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (568 KB) |  | HTML iconHTML  

    In a driver assistant system and a traffic flow monitoring system for ITS, a vision sensor with wide dynamic range is necessary. For imaging target objects under outside environment, dynamic range with 1.5*104 is required, although that of a conventional CCD camera is about 5*102. Our developed sensing system can expand the dynamic range of an image by combining a pair of images successively taken under different exposure conditions. To apply this sensing system to moving objects, a displacement of the target object in a pair of images resulting from motion of the object is evaluated by a normalized correlation method. The experimental results with a miniature car showed the effectiveness of our developed sensing system View full abstract»

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  • Integrated forecasting methods of real-time dynamic travel time of road segment based on discrete time

    Page(s): 209 - 213
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (379 KB) |  | HTML iconHTML  

    The authors consider that the real model of an intelligent transportation system (ITS) should be discrete and assume that vehicles arrival is subject to binomial distribution. The paper presents a theoretical model of travel time prediction. Finally, some examples and applications are included View full abstract»

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