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김상진(Sangjin Kim),김국진(Kookjin Kim),한성제(Sungje Han),전주명(Jumyoung Jeon) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
The purpose of this study is to introduce a process for EPS steering performance development reflecting customer requirements by investigating customer steering clinic outcomes. Nowadays, according to increasing customer expectations, vehicle dynamics is a major source of differentiation in the automotive market. Steering performance is a direct interface between the vehicle and the driver which influences their perception of vehicle characteristics. So, it should be recognized that steering performance is an important element of vehicle dynamics. It also is a key component of customer satisfaction, however, it is difficult to satisfy all customers simultaneously. This study focuses on establishing the process to set targets optimized for the Korean market by defining control factors related to human perception, varying these control factors in a designed experiment and tabulating evaluations by customers. Final results were investigated using statistical analysis. This study demonstrates an effective method to understand customer preferences and apply them to steering performance target setting.
장명훈(Myunghoon Jang),윤동석(Dongseok Yoon),류남열(Namyeul Ryu),전주명(Jumyoung Jeon) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
Brake Drum is one of the most important part of vehicle, which is used to stop the vehicle. It is usually used in rear wheel because it does not have linear output comparing to caliper with rotor system. But it is still well used in many markets due to its cheap cost and good braking performance. In this thesis, drum stiffness is mainly dealt with. Stiffness, Material, Dimension, Balance, FRF are all important elements for brake drum design, but especially stiffness is highly related to cylindricity transformation and sometimes when it is weak, it can cause many kinds of drum related noise and judder. Each key dimensions of drum were considered as control factor of drum stiffness and each key combinations of these control factors were used to compare drum stiffness which is calculated by CAE analysis using ABAQUS. Via DFSS tool, we concluded which dimension is main contributor of high stiffness drum and how we can increase drum stiffness just slightly changing each key dimensions without mass increase.