• 제목/요약/키워드: Emergency braking system

검색결과 71건 처리시간 0.022초

종방향 능동안전장치의 평가기준 연구 (Study for Evaluation Standard of Longitudinal Active Safety System)

  • 장현익;용부중;조성우;최인성;민경찬;김규현
    • 자동차안전학회지
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    • 제4권1호
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    • pp.12-17
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    • 2012
  • ADAS(Advanced Driver Assistance System) which is developed for alleviating driver's load has become improved with extending it's role. Previously, ADAS offered simple function just to make driver's convenience. However, nowadays ADAS also acts as Active Safety system which is made to release and/or prevent accidents. Longitudinal control system, as one of major parts of Active Safety System, is assessed as doing direct effect on avoiding accidents. Therefore, many countries such as Europe and America has pushed longitudinal control system as a government-wide project. In this paper, it covers the result of evaluation system and vehicle evaluation for development study in FCW, ACC and AEB.

작업자 안전을 고려한 무인 폐기물 수거차 시스템 개발 (Development of Unmanned Vehicles System for Waste Collection Considering Worker Safety)

  • 정민권;김상호;이상무;원대희;소병록;이상준
    • 로봇학회논문지
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    • 제17권4호
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    • pp.477-483
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    • 2022
  • In this paper, we propose waste collection vehicle system with a safety device for worker safety and an autonomous driving function. The steering system is applied as MDPS (Motor Drive Power Steering) system to control the waste collection vehicle of the internal combustion engine. Safety-related errors is prevented through redundancy brake of the integrated system and the control braking system. In order to ensure safety between workers and waste collection vehicles, work guidelines and safety devices for emergency stop in case of danger are applied to vehicles. In addition, this research is conducted on improving the working efficiency through vehicle condition monitoring system and a short-range control system for field test. This research is aimed to secure stability through demonstration and contribute to the industrialization of unmanned waste collection vehicles.

VDC 장착 차량의 기동 특성에 관한 연구 (A Study on the Performance Characteristics of the VDC Vehicle)

  • 김태기;박윤기;서명원
    • 한국자동차공학회논문집
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    • 제7권9호
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    • pp.146-157
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    • 1999
  • Safety systems for road vehicles have been rapidly developed in recent years. Especially, the VDC(Vehicle dynamics Control) system is a new active safety system for road vehicles which controls its dynamic vehicle motion in emergency situations . In the case of configuring the VDC system by utilizing the ABS(Anti-lock Brake System), the role of a control logic which directly influences the vehicle motion is very important. In this study the performance of the VDC vehicle was compared to the performances of the CBS (Conventional Brake system )and ABS vehicle. For various driving conditions , the simulation of vehicle dynamics with known VDC control logics was performed. Analysis results showed the VDC vehicle could stably perform even on the road of low coefficient of friction. In addition it was shown that the basic control logic for the VDC system could outstandingly improve driving stability in the case of braking as well as constant speed cruising.

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센서 범위를 고려한 자율주행자동차 교차로 충돌 상황 시뮬레이션 (Intersection Collision Situation Simulation of Automated Vehicle Considering Sensor Range)

  • 이장우;이명수;정재일
    • 자동차안전학회지
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    • 제13권4호
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    • pp.114-122
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    • 2021
  • In this paper, an automated vehicle intersection collision accident was analyzed through simulation. Recently, the more automated vehicles are distributed, the more accidents related to automated vehicles occur. Accidents may show different trends depending on the sensor characteristics of the automated vehicle and the performance of the accident prevention system. Based on NASS-CDS (National Automotive Sampling System-Crashworthiness Data System) and TAAS (Traffic Accident Analysis System), four scenarios are derived and simulations are performed. Automated vehicles are applied with a virtual system consisting of an autonomous emergency braking system and algorithms that predict the route and avoid collisions. The simulations are conducted by changing the sensor angle, vehicle speed, the range of the sensor and vehicle speed range. A range of variables considered vehicle collision were derived from the simulation.

다기능 전방 카메라 개발을 위한 영상 DB 구축 방법에 관한 연구 (A Study on the Image DB Construction for the Multi-function Front Looking Camera System Development)

  • 기석철
    • 한국자동차공학회논문집
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    • 제25권2호
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    • pp.219-226
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    • 2017
  • This paper addresses the effective and quantitative image DB construction for the development of front looking camera systems. The automotive industry has expanded the capability of front camera solutions that will help ADAS(Advanced Driver Assistance System) applications targeting Euro NCAP function requirements. These safety functions include AEB(Autonomous Emergency Braking), TSR(Traffic Signal Recognition), LDW(Lane Departure Warning) and FCW(Forward Collision Warning). In order to guarantee real road safety performance, the driving image DB logged under various real road conditions should be used to train core object classifiers and verify the function performance of the camera system. However, the driving image DB would entail an invalid and time consuming task without proper guidelines. The standard working procedures and design factors required for each step to build an effective image DB for reliable automotive front looking camera systems are proposed.

ABS와 Non-ABS 승용차량의 급제동시 마찰계수 변화 (Friction Coefficient of Emergency Braking on ABS and Non-ABS Car)

  • 김기남;이지훈;옥진규;유완석;박지영
    • 한국자동차공학회논문집
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    • 제16권3호
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    • pp.52-59
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    • 2008
  • Most accident reconstruction or analysis depend on the coefficient of friction to estimate the vehicle speeds. Skid mark and coefficient of friction are usually utilized to calculate the velocity and behavior of vehicles. For a critical case such as traffic accident reconstruction, however, the initial velocity of the car should be calculated precisely. In this paper, emergency brake tests on ABS and Non-ABS brake system are conducted on the dry pavement asphalt road on speed 40, 60, 80 and 100 km/h respectively. The SWIFT sensor was established in the front wheel and rear wheel at driver side to measure the forces, moments and speeds of revolution of the tires. These tests results can be available to brake tests and accident reconstruction.

합성곱 신경망 기반 물체 인식과 탑승 감지 센서를 이용한 개인형 이동수단 주행 안전 보조 시스템 개발 (Development of Personal Mobility Safety Driving Assistance System Using CNN-Based Object Detection and Boarding Detection Sensor)

  • 손권중;배성훈;이현준
    • 한국융합학회논문지
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    • 제12권10호
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    • pp.211-218
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    • 2021
  • 최근에 전동킥보드와 같은 개인형 이동수단의 보급이 급격히 확대되면서 교통사고 발생 건수도 크게 늘고있다. 개인형 모빌리티가 자세 안정성이 낮고 탑승자가 외부로 노출되어 전도 사고나 낙상 사고의 위험이 크기 때문이다. 전동킥보드 사고 방지를 위해 본 논문은 주행 보조 장치로써 자동긴급제동시스템과 안전시동시스템을 제안하였다. 인공지능 기반 물체 인식 기술을 이용하여 주변 위험 요소를 탐지하고 자동으로 제동을 걸 수 있는 시스템을 개발하였다. 또한 운전자의 탑승이 확인되기 전까지 장치의 시동을 보류하는 안전시동시스템도 개발하였다. 상용차와 주행 조건이 매우 다른 개인형 이동 수단에 특화된 첨단 운전자 보조 시스템 융합 기술을 제안한다는 점에서 본 연구의 의의가 있다.

A Study of Slip Ratio Control of 3 Port -2 Position Solenoid Valve using PWM Control

  • Kim, Jung-Hwan;Choi, Jong-Hwan;Lee, Jin-Kul
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.170.3-170
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    • 2001
  • Antilock brake system(ABS) prevent the wheels of road vehicle from locking up and skidding so that the braking force is from static friction instead of kinetic friction. Therefore ABS helps drivers maintain steering control during breaking situation particularly at an emergency stopping situation. So when trying to stop the road vehicle it is best to have the most friction possible for faster deceleration ABS keep the wheels turning which means there is more friction between the tires of vehicles and the road surface. Because of this advantage, ABS are now a commonly installed feature for passenger's safety in road vehicles. In this study, hydraulic system of ABS of vehicle is composed of 3port-2position solenoid valve. In order to minimize ...

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끼어들기 상황에서의 자동비상제동장치 평가 시나리오 개발 (AEBS Evaluation Scenario Including Cut in Situation)

  • 박명연;박영걸;이은덕;신재곤;정재일
    • 자동차안전학회지
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    • 제9권3호
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    • pp.46-52
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    • 2017
  • In this study, safety evaluation scenarios on "cut-in" situation are presented to assess the performance of automatic emergency braking systems. The ASSESS project in EU is surveyed for derive efficient test scenarios for cut-in situation. The TASS database are also analyzed to find representative accident scenarios in Korea. With the results of the ASSESS and TASS, the safety evaluation scenarios in cut-in situations are suggested and the scenarios are tested with simulation software PRESCAN.

실사고에서 AEB의 거리감지범위에 따른 승객 상해 심각도 분석 (An Evaluation of Occupant Injury Severity Based on Distance Detection Range of AEB in a Real Accident)

  • 박지양;윤영한
    • 자동차안전학회지
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    • 제11권3호
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    • pp.7-12
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    • 2019
  • AEB (Autonomous Emergency Braking system), a system in which vehicles automatically recognize forward objects or pedestrians and actively brake when forward collisions are expected, has been mandated by NHTSA (National Highway Traffic Safety Administration) and IIHS (Insurance Institute for Highway Safety) for all vehicles sell in the United States since 2022, and AEB research is also actively underway in korea. In this study, it can be confirmed that the passenger injury is reduced according to the AEB detection distance when it is assumed that the AEB is mounted in the actual event generated from KIDAS (Korea New Car Assessment Program) data through various analysis programs.