• Title/Summary/Keyword: Changing algorithm

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Implementation of Master Changing Algorithm between Nodes in a General Electric Vehicle Network (일반 전동차량 네트워크의 노드간 MASTER 전환 알고리즘 구현)

  • Yeon, Jun Sang;Yang, Oh
    • Journal of the Semiconductor & Display Technology
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    • v.16 no.3
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    • pp.65-70
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    • 2017
  • This paper presents the implementation for the master changing algorithm between nodes in a general electric vehicle. The packet processing method based on the unique network method of an electric vehicle is that the method of processing a communication packet has the priority from the node of a vehicle installed at both ends. An important factor in deciding master or slave in a train is that the request data, the status data, and transmits or control codes of sub-devices are controlled from the node which master becomes. If the request data or the status data is transmitted from the non- master side, it is very important that only one of the devices of both stages be master since the data of the request data may collide with each other. This paper proposes an algorithm to select master or slave depending on which vehicle is started first, which node is master or slave, and whether the vehicle key is operation. Finally experimental results show the stable performance and effectiveness of the proposed algorithm.

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A Camera Based Traffic Signal Generating Algorithm for Safety Entrance of the Vehicle into the Joining Road (차량의 안전한 합류도로 진입을 위한 단일 카메라 기반 교통신호 발생 알고리즘)

  • Jeong Jun-Ik;Rho Do-Hwan
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.43 no.4
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    • pp.66-73
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    • 2006
  • Safety is the most important for all traffic management and control technology. This paper focuses on developing a flexible, reliable and real-time processing algorithm which is able to generate signal for the entering vehicle at the joining road through a camera and image processing technique. The images obtained from the camera located beside and upon the road can be used for traffic surveillance, the vehicle's travel speed measurement, predicted arriving time in joining area between main road and joining road. And the proposed algorithm displays the confluence safety signal with red, blue and yellow color sign. The three methods are used to detect the vehicle which is driving in setted detecting area. The first method is the gray scale normalized correlation algorithm, and the second is the edge magnitude ratio changing algorithm, and the third is the average intensity changing algorithm The real-time prototype confluence safety signal generation algorithm is implemented on stored digital image sequences of real traffic state and a program with good experimental results.

다수 표면실장기계를 포함하는 PCB조립라인의 작업분배 알고리즘 설계 II

  • 김진철;이성한;이범희
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1237-1240
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    • 1996
  • This paper proposes a heuristic algorithm for performing the line balancing of PCB assembly fine including multiple surface mounters efficiently. We consider a PCB assembly line including the multiple surface mounters arranged serially as a target system. We assume that the number of heads of surface mounters can be changed. Also, the conveyor is assumed to move at a constant speed and have no buffer. Considering the minimum number of machines required for the desired production rate is a discrete nonincreasing function which is inversely proportional to the cycle time, we propose an optimization algorithm for line balancing by using the binary search method. Also we propose an head-changing algorithm. The algorithms are validated through the computer simulation.

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Multi-Vehicle Environment Simulation Tool to Develop and Evaluate Automated Driving Systems in Motorway (고속도로에서의 자율주행 알고리즘 개발 및 평가를 위한 다차량 시뮬레이션 환경 개발)

  • Lee, Hojoon;Jeong, Yonghwan;Min, Kyongchan;Lee, Myungsu;Shin, Jae Kon;Yi, Kyongsu
    • Journal of Auto-vehicle Safety Association
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    • v.8 no.4
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    • pp.31-37
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    • 2016
  • Since real road experiments have many restrictions, a multi-vehicle traffic simulator can be an effective tool to develop and evaluate fully automated driving systems. This paper presents multi-vehicle environment simulation tool to develop and evaluate motorway automated driving systems. The proposed simulation tool consists of following two main parts: surrounding vehicle model and environment sensor model. The surrounding vehicle model is designed to quickly generate rational complex traffic situations of motorway. The environment sensor model depicts uncertainty of environment sensor. As a result, various traffic situations with uncertainty of environment sensor can be proposed by the multi-vehicle environment simulation tool. An application to automated driving system has been conducted. A lane changing algorithm is evaluated by performance indexes from the multi-vehicle environment simulation tool.

A Scheme for Load Distribution and Macro Mobility in Hierarchical Mobile IPv6 (HMIPv6에서 부하분산 및 매크로 이동성 지원 방안)

  • Seo, Jae-Kwon;Lee, Kyung-Geun
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.44 no.4
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    • pp.49-58
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    • 2007
  • Hierarchical Mobile IPv6 (HMIPv6) has been proposed by Internet Engineering Task Force (IETF) to compensate for such problems as handover latency and signaling overhead in employing Mobile IPv6 (MIPv6). HMIPv6 supports micro-mobility within a domain and introduces a new entity, namely mobility anchor point (MAP) as a local home agent. However, HMIPv6 causes load concentration at a particular MAP and longer handover latency when inter-domain handover occurs. In order to solve such problems, this paper establishes a virtual domain (VD) of a higher layer MAP and proposes a MAP changing algorithm in which the routing path changes between mobile node (MN) and correspondent node(CN) according to the mobile position and the direction of the MN before inter-domain handover occurs. The proposed algorithm not only enables complete handover binding-update of the on-link care of address (LCoA) only when inter-domain handover occurs, but concentrated load of a particular MAP is distributed as well. This is because the MNs registered with higher layer MAP and lower layer MAP coexist in the VD. We simulate the performance of the proposed algorithm and compare with HMIPv6.

A Study on DC Changing Algorithm of the Line-Interactive UPS with Dual Converter Structure (2중 컨버터 구조를 갖는 계통 연계형 UPS의 DC 충전 알고리듬에 관한 연구)

  • Lee, Woo-Cheol;Yoo, Dong-Sang
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.3
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    • pp.27-34
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    • 2005
  • This paper presents a three phase Line-Interactive uninterruptible power supply(UPS) system with dual converter structure. The three phase UPS system consists of two active power compensator topologies. One is a series active compensator, which works as a voltage source in phase with the source voltage to have the sinusoidal source current and high power factor under the deviation and distortion of the source voltage. The other is a parallel active compensator, which works as a conventional sinusoidal voltage source in phase with the source voltage, providing to the load a regulated and sinusoidal voltage with low total harmonic distortion(THD). This paper presents in the series and parallel active compensator charging method depending on the amplitude of the source voltage. The conventional Line-Interactive UPS system is responsible for the DC charging and output voltage regulation at the same time, but UPS system with dual converter structure, a series active compensator can also charge the DC link. Therefore the charging algorithm using the series and parallel compensator needs to be researched. Therefore, by making the DC link voltage stable it can contribute the stability of series and parallel compensator. The simulation and experimental result are depicted in this paper to show the effect of the proposed algorithm.