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신영재,윤종학 安東大學 1998 安東大學 論文集 Vol.20 No.1
In this study compound planetary gear, which is used at continuously variable transmission, and which is combined with three P1 (or P2) gears, is modeled that considered variable nonlinear gear mesh stiffness and damping when gear rotate, and thus equation of motion of compound planetary gear is derived. Locus of sun gear center causing noise and vibration is being determined from performing derived state equation with numerical analysis in fourth order Runge-Kutta method.
신영재 安東大學 1992 安東大學 論文集 Vol.14 No.1
In order to comprehend the characteristics of variable displacement swash plate type axial piston pump compressor and better the performance of it, it is an important matter to derive and solve the equations of motion of this compressor. In this paper, the equations of motion of this compressor are derived by constrained Newton-Euler method, considering the effect of friction. Reaction forces and reaction moments of each compressor joint and input torque of the compressor are obtained by this theoretical equations of motion. The numerically calculated results are ascertained by experimental measurements.
신영재,강성황 안동대학교 공업기술연구소 1995 공업기술연구논문집 Vol.2 No.1995
Modern antilock brake systems are designed to prevent wheel lock on all wheels of a car by sensing wheel angular speed, processing the speed sensor signals in suitable digital electronic control circuits and command electrohydraulic actuators to control brake pressure. This study considers a control cycle of ABS using wheel circumferential acceleration thresholds which avoids dangerous wheel locking due to excessive brake pressure during the vehicle braking and discusses the 3-channels, 3-sensors ABS system that employs "Independent control" technique for the front wheels and "Select low" technique for the rear wheels. The validities of the ABS such as vehicle stability, steerability and stopping distance during braking are assured through the vehicle tests on uniform asphalt straight roads.
신영재,이현석,권이균,곽원준 한국지질과학협의회 2014 Geosciences Journal Vol.18 No.3
Within BlackGold Lease located in northern Alberta,the Lower Cretaceous McMurray Formation contains the most prolificbitumen reservoirs deposited in fluvial to tidally-influencedestuarine environments. Based on core descriptions and wire-line logevaluation, this study reveals six lithofacies: cross-stratified sandstoneand mudstone-clast breccia (Lf1), sandstone-dominated IHS(Lf2), mudstone-dominated IHS (Lf3), thinly interbedded sandstoneand mudstone (Lf4), laminated mudstone (Lf5), and clean sandstonewith interbedded mudstone (Lf6). To understand the evolution ofdepositional environments vertical and lateral associations of lithofaciesare examined using well cross-sections and lithofacies slice maps. During overall rise in relative sea level, the McMurray Formationevolved through three stages of deposition: early stage representsfluvial channels with minor tidal influence, middle stage representstidally-influenced estuary with well-developed meandering channels,and late stage represents a drowning of tidally-influenced estuary. The potential bitumen reservoirs are fluvial channel sandstones inthe early stage and lower point-bar deposits in the middle stage. The fluvial channel sandstones are well stacked and correlatablebetween wells, forming sheet-like sandstone bodies that align in aSW–NE direction parallel to the inferred orientation of major channelsystems. The lower point-bar deposits consist mainly of base-ofchanneland sandstone-dominated IHS deposits. The direction ofpoint-bar migration, which is crucial in horizontal well design forbitumen production, is inferred from lithofacies slice maps. Thelateral changes in lithofacies from base-of-channel to abandonedchannel-fills through IHS deposits, shown in lithofacies slice maps,probably indicate that the point bar once migrated toward abandonedchannel-fills. Based on this lateral lithofacies trend, the dipdirection of some point-bar deposits are approximately estimatedto be southwestward or northwestward, which is oblique or perpendicularto the major channel orientation.
비틀림을 받는 세로 격벽이 있는 자동차 스폿용접 상자형 단면부재의 응력분포와 피로강도 평가
신영재,신동명,강성황,임석현 安東大學校 工業技術硏究所 1994 공업기술연구논문집 Vol.1 No.1
Vehicle body frame structure consists of box shape beams. Especially some parts (i.e. Sill side, Roof rail) loaded by torsion are reinforced with longitudinal partitions. Generally partitions do not affect stress distribution and stiffness of box beams if these parts are symmetric structure with zero welding pitch the whole part are welded together. In spite of those parts, partitions are deformed by torsion and those have influence on stress distribution and stiffness of them even if they are made by spot welding.
신영재,강성황 安東大學校 工業技術硏究所 1994 공업기술연구논문집 Vol.1 No.1
Dynamic balance such as input torque and angular velocity fluctuation is an important problem in the design of machines and mechanisms, Geneally, control of angular velocity fluctuation is obtained primarily by a flywheel which the moment of inertia is very big. But it can not cancel completely the fluctuation of angular velocity. This paper investigates a design method of noncircular geared flywheel which can eliminate perfectly the angular velocity and input torque fluctuation of the mechanical system. The ratio of angular velocity of crank shaft and noncircular geared flywheel is derived, which sets the relation between the flywheel and profit and loss work of the mechanical system.