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자동차 현가모듈의 내구설계를 위한 가상 내구시험기법 정립 및 응용
손성효(Sunghyo Son),허승진(Seung-Jin Heo) 한국자동차공학회 2003 한국 자동차공학회논문집 Vol.11 No.4
Recently, the virtual test techniques using computer simulation play an important part in the vehicle development procedures in order to reduce the development time and cost by replacing the physical prototypes of the vehicle components or systems with the virtual prototypes. In this paper, virtual durability test procedures for the vehicle suspension module have been developed. Virtual durability lest consists of dynamic simulation computing load history of suspension components, fatigue analysis computing the life of components. A vehicle suspension module for dynamic simulation are developed and validated by comparison with the measured data obtained from the field vehicle test. And on the basis of the validated vehicle suspension model, fatigue analysis has been performed for the virtual durability design of the suspension components.
현가부품 내구하중 추출을 위한 가상 내구 시험 기법 연구
손성효(Seong-Hyo Son),강대오(Dae-Oh Kang),허승진(Seung-Jin Heo),김동석(Dong-Seok Kim),강오성(Oh-Sung Kang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
To reduce vehicle development cycles it is necessary to perform numerical durability analysis in an early development phase. This paper presents an alternative method 'VTL : Virtual Testing Lab' to predict the required loads for fatigue analysis. In VTL using Multi-Body Simulation (MBS), the loads prediction process can be performed for an constrained or unconstrained vehicle under several different conditions. Various VTL methods and related technologies showing different results are introduced and evaluated in this paper.
현가부품 내구하중 추출을 위한 가상 내구 시험 기법 연구
손성효(Seong-Hyo Son),강대오(Dae-Oh Kang),허승진(Seung-Jin Heo),김동석(Dong-Seok Kim),강오성(Oh-Sung Kang) 한국자동차공학회 2005 한국자동차공학회 Symposium Vol.- No.-
To reduce vehicle development cycles it is necessary to perform numerical durability analysis in an early development phase. This paper presents an alternative method 'VTL : Virtual Testing Lab' to predict the required loads for fatigue analysis. In VTL using Multi-Body Simulation (MBS), the loads prediction process can be performed for an constrained or unconstrained vehicle under several different conditions. Various VTL methods and related technologies showing different results are introduced and evaluated in this paper.
VPG 기법 개발을 위한 특수로 주행 시험 및 시뮬레이션
손성효(Sunghyo Son),김용연(Yongyun Kim),허승진(SeungJin Heo),계경태(Gyungtae Kye),윤중흠(Junghm Yoon) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
As an effort to enhance of the durability and breakdown performance of vehicle suspension system, multi-body dynamics has been applied into simulation and design recently. But because of the difficulties of construction of road profile and tire model, VPG(Virtual Proving Ground) simulation using those rarely has been studied. Instead of VPG simulation, a simulation with an idea based on VTL(Virtual Testing Lab) inputting forces into wheel center directly has been the main current in this area. This study shows a new approach to use tire model and road profile to make a simulation of VPG rather than VTL. For VPG simulation 2-dimensional road profiles of some special roads like weak pot-hole road and washboard road are measured and F-tire model for durability analysis was created. And as VTL simulation does, multi-body vehicle model composed by rigid body and linear/nonlinear force elements was used in this study. For validation of simulation results not only wheel forces but various signals of suspension components using strain gage were measured with road profile simultaneously. Using this VPG method it is expected to calculate the transferred forces to suspension system without wheel force signals and to define more accurate max-impact force levels to suspension components in early stage of design process.
차량 영상 데이터 베이스 구축을 위한 계측 시스템 개발
손성효(Seonghyo Son),문희창(Heechang Moon),김민관(Minkwan Kim),최명식(Myung Sik Choi) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
According as intelligence of vehicle is getting improved, vehicle is getting to recognize outside environment and driver's status by itself, and find out how to guarantee safety in urgent or dangerous situation or let the driver know the situation and react safely. Diverse systems have been and are being developed related this tendency and some systems have been conveyed to customers. Among several sensors used in these systems, major portion is occupied by cameras. Camera do a dominate role for sensing outside situations. PAS, LDWS, BSD are the representative applications using camera. To develop these kind of systems with high performance and quality, countless tests have to be performed during developing procedure. Via these tests, many image database in various driving situations are accumulated and analyzed for developing processing algorithm. Based on this purpose, a test vehicle and image database acquisition system was developed and is introduced in this paper. The test system can acquire CAN information of vehicle, front and side obstacle information from laser scanner and image data from 8 analog cameras simultaneously. And some softwares for editing and analyzing the acquired data are introduced additionally. We expect that high-technologized driving assistance systems will be developed efficiently through this test system.
도로면 측정 분석 시스템 개발 및 국내 도로면 특성평가 응용 연구
손성효(Sunghyo Son),허승진(Seung-Jin Heo) 한국자동차공학회 2003 한국 자동차공학회논문집 Vol.11 No.3
The 'AEIPR' (Accelerometer Established Inertial Profiling Reference) method has been applied to measure the road profile. The dynamic road profiling method using AEIPR has the advantages of cost effectiveness, measuring speed and relatively high reliability. However, it is required to improve the double integration algorithm to get the measurement results with the accuracy of higher level. In the first part of this paper, the effective double integration algorithm is suggested and the 'Road Profiler' software is developed on the basis of the algorithm. Road profiling tests are performed using the developed 'Road Profiler' system on the specially designed tracks for the durability tests and the various types of pubic roads. Test results are shown and evaluated by the international road evaluation indicies and classification.