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능동후드리프트 시스템의 구조 설계에 따른 전개시간의 실험적 평가
이태훈(Tae-Hoon Lee),윤근하(Gun-Ha Yoon),최승복(Seung-Bok Choi) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
In this research, according to the structural complement of the system, the performances of active hood lift system (AHLS) activated by gunpowder actuator is investigated through the experimental test. After introducing the working principle of AHLS using gunpowder actuator, structural problems are analyzed and the improved structural model is proposed to reduce the deployment time of system. The deployment time of AHLS are evaluated by the experimental test and it has been identified that the improved model can provide a faster deploying time of AHLS.
능동후드리프트 시스템의 구조 설계에 따른 전개시간의 실험적 평가
이태훈(Tae-Hoon Lee),윤근하(Gun-Ha Yoon),박춘용(Chun-Yong Park),강제원(Je-Won Kang),최승복(Seung-Bok Choi) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.3
In this research, the performances of active hood lift system(AHLS) are investigated according to the structural improvement through the experimental test. After introducing the working principle of the AHLS activated by a gunpowder actuator, the structural problems that cause the inefficiencies in the actuation are analyzed to reduce the deployment time of system. Sequentially, the improved structural model is proposed base on the analysis. The deployment time of AHLS are evaluated by the experimental test, and it has been identified that the improved model can provide a faster deploying time of AHLS.
승용차 능동후드리프트 시스템의 전개 방식에 따른 성능 평가
이태훈(Tae-Hoon Lee),윤근하(Gun-Ha Yoon),박춘용(Chun-Yong Park),강제원(Je-Won Kang),최승복(Seung-Bok Choi) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.3
This work investigates the performances of active hood lift system(AHLS) activated by two different operating methods through the experimental test. In the AHLS, the deployment time of the system and decrement of pedestrian injury are the most important factors for the pedestrian safety during the pedestrian-vehicle impact. After introducing the working principle of AHLS using spring actuator and gunpowder actuator, the deployment time of AHLS and decrement of pedestrian injury are evaluated by the experimental test. It has been identified that the gunpowder actuator can provide a faster deploying time of AHLS.
중요 설계변수에 따른 승용차 능동후드리프트 시스템의 전개시간 연구
이태훈(Tae-Hoon Lee),윤근하(Gun-Ha Yoon),최승복(Seung-Bok Choi) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.1
This research investigates the deployment time of an active hood lift system(AHLS) activated a gunpowder actuator for the passenger vehicle. The deployment time of the system is investigated by changing the principal design parameters of the system. In order to achieve this goal, after introducing the geometric structure and operating principle of the AHLS, the dynamic equations of the system are formulated for deploying motion. Subsequently, using the dynamic equations, the deployment time of the system is determined by changing several geometric design parameters such as location of actuator. It is then identified which design parameters are main factors to affect the deployment time of AHLS.
압전작동기 밸브를 이용한 반능동 차량현가장치의 성능 고찰
한철희(Chulhee Han),윤근하(Gun-Ha Yoon),박영대(Young-Dai Park),최승복(Seung-Bok Choi) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.1
This paper proposes a new type of semi-active direct-drive valve(DDV) car suspension system using piezoelectric actuator associated with displacement amplifier. As a first step, controllable piezoelectric DDV damper is designed and governing equation of a quarter-vehicle suspension system consisting of sprung mass, spring, tire and the piezostack DDV damper is constructed. After deriving the equations of the motion, in order to control spool displacement and damping force the skyhook controller is designed and applied. The performance evaluation of the proposed semi-active suspension system is conducted with different displacement of spool. Then, the ride comfort analysis is undertaken in time domain with bump road profile.
차량 도어 래치의 작동력 계산을 위한 수식 유도 : 파트 2-OS/IS래버, 전체 작동력 분석
이예호(Ye-Ho Lee),이태훈(Tae-Hoon Lee),최승복(Seung-Bok Choi),윤근하(Gun-Ha Yoon),김완현(Wan-Hyun Kim),정병대(Byoung-Dae Jung),이진복(Jin-Bok Lee),김다빈(Da-Bin Kim),신진용(Jin-Young Shin) 한국소음진동공학회 2020 한국소음진동공학회 논문집 Vol.30 No.1
A car door has an inner handle and an outer handle. The magnitude of the operating force of the two handles is commonly influenced by the catch, pawl, and release lever of the door latch, and is divided into an OS lever and an IS lever. OS lever and IS lever are connected to the cable of the handle allowing the final operating force to be obtained. Therefore, it should be divided into two cases in the release lever in the door latch. Because the formulated variables change, an analysis of how much each variable contributes to the maximum operating force needs to be undertaken. In particular, because each part has a torsion spring attached, which part contributes the most to the maximum operating force owing to a change in the spring coefficient should be analyzed. In addition, since the maximum operating force is expressed as the force on the moment, the maximum operating force according to the change of distance from the center of rotation to the contact point between parts is analyzed.
차량 도어 래치의 작동력 계산을 위한 수식 유도 : 파트 1- 캐치, 파울 및 릴리스 래버
이예호(Ye-Ho Lee),이태훈(Tae-Hoon Lee),최승복(Seung-Bok Choi),윤근하(Gun-Ha Yoon),김완현(Wan-Hyun Kim),정병대(Byoung-Dae Jung),이진복(Jin-Bok Lee),김다빈(Da-Bin Kim),신진용(Jin-Young Shin) 한국소음진동공학회 2020 한국소음진동공학회 논문집 Vol.30 No.1
Numerous studies on improving the emotional quality and automatic functionality of automobiles have recently been conducted based on various aspects. The first components touched by passengers are the vehicle doors, and thus the feeling of the opening and closing of the doors is a significant emotional quality and should be treated seriously. In this regard, mathematical equations calculating the operating force of the door latch, which have yet to be reported elsewhere, are formulated in this study. The forces acting on each component are gravity, elasticity, friction, and the normal force. Therefore, the door latch operating force has been formulated as the moment of the force action because all parts rotate about the axis of rotation. Because there are numerous parts used in a door latch, this study is divided into two parts. In part 1, formulas used to calculate the operating force of the catch, pawl, and release lever are determined. And formulas for calculating the OS levers, IS levers and the maximum operating force are analyzed in part 2. In addition, a clear definition of the opening point and the operating force up to the release lever is formulated.
시뮬링크를 기반으로 한 파워 트렁크 리드 시스템의 동역학 모델링 및 제어기 설계
이상운(Sang-Woon Lee),이재천(Jae-Cheon Lee),류하오(Hao Liu),최영일(Young-Il Choi),정병대(Byoung-Dae Jung),윤근하(Gun-Ha Yoon) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Nowadays PTL(Power Trunk Lid) system is used to provide convenience to drivers and passengers by supplying additional power for existing trunk lid. In the paper the mathematical dynamical model of a PTL system is first constructed, and the simulation without control is performed to show the process of the trunk lid opening. Next in order to operate the trunk lid smoothly and safely, based on the above analytical dynamic model a PI controller is designed by using Matlab/Simulink. The simulation results indicate that the trunk lid is properly controled in the process of open, stop and close, which is closed to the set speed profile.