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RISS 인기검색어
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- 저자 : 정하철(Hachul Jeong) (검색결과 5 건)
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BCM 소프트웨어 검증을 위한 HIL기반의 자동화 테스트
정하철(Hachul Jeong),손세훈(Sehoon Son) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
As the growing number of electric/electronic devices in the vehicle tends to be more likely general, more requirements are added and complicated systems are implemented. Moreover it comes with serial data communication between controllers in the subsystem or system level. In an effort to meet the target of development and continue on pursuing the better quality at the same time there has been various different ways of approach to execute validation and verification testing on system or subsystem level. In a similar vein, General Motors has developed the HIL(Hardware-In-The-Loop) based automation testing configuration. The object of this test environment is genuinely to reduce issues down to the lowest possible level as to secure more reliable vehicle quality. Furthermore, it is expected to provide test environment for complex and repetitive test cases under various different conditions. The HIL based automated testing is a process of writing test procedures to execute the test and build a model for operating interface. Once tests have been automated, they can be run quickly and repeatedly. This can be cost effective method once tests are laborious and time consuming. Also it may be effective in finding certain classes of defects. This article shows about what HIL based automation testing from GM can provide through experimental testing execution.
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HIL(Hardware-In-the-Loop) 기반의 Automated Test
박헌(Heon Park),정하철(Hachul Jeong) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Today, the electronic rate of automobile is increasing rapidly as consumer’s diverse requirements for the fuel economy, performance, quality, safety and convenience. electrical/electronic-related field quality problem is also increasing. If hybrid or electric vehicle is commonplace, this trend is expected to accelerate even more. While the electronic rate of vehicle is continuously increasing, market lifetime is shortened and the new car development and validation cycle time is also a tendency to shorten. There are many approaches such as model-based software and reusing software component development in order to minimize these issues in the development states. But vehicle’s characteristic is different depending on it’s features and options, so system level faults such as integration fault or network communication fault are still exist and these system level verification and validation process is performed on the vehicle manufacturers. Under these circumstances, General Motors developed the HIL(Hardware-In-the-Loop) based automated test process in order to reduce the development / validation cycle time and ensure more reliable vehicle quality. This automated test process makes possible to perform tests that require critical timing, hazardous environment, complex scenario and repetitive practice under various conditions. And we can obtain more reliable test results, as well as validation cycle time is reduced and the quality of vehicle is improved. This paper introduces the HIL based automated test process that is developed by General Motors
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시스템 파워모드에 대한 차량소프트웨어 검증 및 자동화 테스트
손세훈(Sehoon Son),정하철(Hachul Jeong) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The normal operation of ECUs connected to the vehicle network can, at times, be adversely affected by changes in vehicle state or system power mode. These effects often manifest themselves as communications faults with other ECUs on the network, or losses in normal functionality such as I/O failures and increased quiescent current draws. Failures of this type are often due to internal ECU tasks associated with startup, in conjunction with unanticipated interrupts or services which typically accompany network initialization. Changes in vehicle state or system power mode during ECU shutdown can also induce anomalies if such transitions occur during critical periods such as internal hardware entering sleep mode. While repetitive changes in vehicle state or power mode can be manually induced by a human tester, the sheer number of cycles required, along with the critical timing sequences that must often be reproduced dictate the use of an automated tool or device for these types of tests.
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모델링에 기반한 전기자동차 배터리 열관리 시스템의 영향
최종우(Jongwoo Choi),조구영(Gooyoung Cho),박준호(Joonho Park),임재환(Jaehwan Lim),정하철(Hachul Jeong),차석원(Suk-Won Cha) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In this paper, effects of battery thermal management system was simulated. As increasing needs of HEV and EV, keeping battery temperature to their optimum condition is now one of the most important topics in battery research area. Battery thermal management system helps to keep optimum temperature condition by controlling cooling and heating system. However, it needs electrical power to work, which directly decreases SOC of the battery. Thus, battery thermal management system has both positive and negative effect to the HEV and the EV. To show these effects, battery thermal management system model was made and simulated. Modeling and simulation were done by using Autonomie<SUP>®</SUP> and MATLAB<SUP>®</SUP>.
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최종우(Jongwoo Choi),조구영(Gu Young Cho),임재환(Jaehwan Lim),이호섭(Hosub Lee),정하철(Hachul Jeong),차석원(Suk-Won Cha) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this paper, battery model based on voltage loss is simulated. There are three main energy (voltage) losses during battery working; ohmic loss, electrochemical loss, mass transport loss. Mass transport loss is ignored due to it only arises when battery SOC is nearly zero. This paper focused energy loss due to electrochemical characteristics of the battery. Butler-Volmer equation and Randles circuit are introduced to modeling electrochemical energy loss. Results show that both methods work well for the simple cell level simulation.
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