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박일래(park Il Rae),유영일(You Young Il) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
The steering effort is an important characteristic of vehicles because it influences driver comfort directly. Steering effort and steering feel are of interest in this report. This report used the AutoSim to model the vehicle and to prepare simulation code. FORTRAN was used to analyze the non-linear behavior of vehicle and was also used for type modeling using the Magic Formula. A parametric study of these parameters is carried out to get their effects on the steering effort. The influences of design parameters and driving conditions were computed
[차량운동성능부문] Center Feel Assist Valve의 개발
박일래(Park Il Rae),강도갑(Kang Do Kap),방창섭(Bang Chang Seob) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Power steering that had been developed to assist steering effort at (parking and at very slow speed driving. Steering feel may get worse due to the existence of torsion 1m that is twisted in order to activate the power steering valve. Also friction and stiffness of the power steering system affect steering feel in terms of on-center feel at high speed driving. "Centre Feel Assist" mechanism was developed for improving the steering feel at straight ahead and high speed driving, on the basis of the conventional valve. By adopting CFA valve, it was possible to optimise the steering valve characteristics and consequently the steering performance without increasing static steering effort.
김호진,문준성,박일래,김중희,윤지성,원규장,이형우 대한내분비학회 2017 Endocrinology and metabolism Vol.32 No.3
Background: Plasma soluble cluster determinant 36 (sCD36) level is closely related with insulin resistance and atherosclerosis, but little is known whether it could be a surrogate for estimating risk of developing diabetes or not. To address this, we evaluated association between sCD36 index, the product of sCD36 and fasting plasma glucose (FPG), and the prevalence of type 2 diabetes mellitus (T2DM), and then compared with triglyceride-glucose (TyG) index which has been suggested simple index for insulin resistance. Methods: This was cross-sectional study, and participants were classified as normal glucose tolerance (NGT), prediabetes, and T2DM according to glucose tolerance. The formula of TyG index was ‘ln [FPG (mg/dL)×triglyceride (mg/dL)/2],’ and the sCD36 index was ‘ln [sCD36 (pg/mL)×FPG (mg/dL)/2].’Results: One hundred and fifty-five subjects (mean age, 55.2 years) were enrolled, and patients with T2DM were 75. Both indexes were significantly increased in prediabetes and T2DM rather than NGT, and sCD36 index was positively correlated with both glycosylated hemoglobin and homeostasis model assessment of insulin resistance (r=0.767 and r=0.453, respectively; P<0.05) and negatively with homeostasis model assessment estimate of β-cell function (r=–0.317). The odds ratio (OR) of sCD36 index for T2DM was 4.39 (95% confidential interval, 1.51 to 12.77) after adjusting age, gender, blood pressure, smoking, alcohol, non-high density lipoprotein cholesterol and high-sensitivity C-reactive protein. However, OR of TyG index did not remained significance after adjustment. Conclusion: sCD36 index has an independent association with the risk of T2DM, and showed better correlation than TyG index. These results suggest sCD36 index might be useful surrogate marker for the risk of diabetes.
[차량운동성능] 전동 파워 스티어링 개발 -스티어링 컬럼 구동
강도갑(Kang Do Kap),방창섭(Bang Chang Sup),유영일(You Young Il),박일래(Park Il Rae) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
Electric Power Steering(EPS) was developped to assist steer using electric motor. EPS drives motor only at the time of steering and according to the driving conditions, so EPS gives optimal steer characteristic and reduces fuel consumption. Also EPS can reduce the weight of steering system and it need not power steering oil. This paper describes the development process of EPS and compares the ability of EPS to that hydraulic power steering. The EPS was tested on a front wheel drive vehicle weighing 600kg in front axle load.