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다구찌 방법을 이용한 Instrument cluster 상의 IVIS 메뉴 설계에 대한 연구
홍승표(Seung P. Hong),김성민(Seong M. Kim),박성준(Sungjoon Park),정의승(Eui S. Jung) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.1
The growth of function in vehicle needs complex display and control system, the In-Vehicle Information System(IVIS). Although Current IVISs are widely implemented in commercial vehicles, a new form of IVIS has been recently studied in order to reduce drivers' workloads. The purpose of this study is to suggest an appropriate menu structure of a new type IVIS, to be implemented on the instrument cluster panel, using Taguchi's parameter design. In the research, firstly, functions were selected that are appropriate to control through the instrument cluster among existing functions of current IVISs by quantitative evaluation of ergonomic principles. Then, menu structure altematives were extracted by investigating priorities to those functions selected. Finally, menu structure altematives were evaluated through an experiment and suggest the most appropriate one by applying Taguchi's parameter design. Taguchi method was used not only for planning an experiment but also evaluating altematives. SN ratios were a key value to evaluate the altematives and to find the most proper one. Through the research, the most appropriate menu structure for the instrument cluster IVIS was finally suggested among the altematives and it is expected that the results of this research could provide a guideline to the instnllnent cluster IVIS.
백승창(Seung Chang Baek),정의승(Eui S. Jung),박성준(Sung Joon Park) 대한인간공학회 2009 大韓人間工學會誌 Vol.28 No.4
The tactical computer is currently being developed and installed in armored vehicles and tanks for reinforcement. With the tactical computer, Korea Army will be able to grasp the deployment status of our forces, enemy, and obstacles under varying situations. Furthermore, it makes the exchange of command and tactical intelligence possible. Recent studies showed that the task performance is greatly affected by the user interface. The U.S. Army is now conducting user-centered evaluation tests based on C2 (Command & Control) to develop tactical intelligence machinery and tools. This study aims to classify and regroup subordinate menu functions according to the user-centered task performance for the Korea Army's tactical computer. Also, the research suggests an ergonomically sound layout and size of main touch buttons by considering human factors guidelines for button design. To achieve this goal, eight hierarchical subordinate menu functions are initially drawn through clustering analysis and then each group of menu functions was renamed. Based on the suggested menu structure, new location and size of the buttons were tested in terms of response time, number of error, and subjective preference by comparing them to existing ones. The result showed that the best performance was obtained when the number of buttons or functions was eight to conduct tactical missions. Also, the improved button size and location were suggested through the experiment. It was found in addition that the location and size of the buttons had interactions regarding the user's preference.
KSLV-I 운용에서의 추진제 및 고압가스 품질관리 활동 결과
정영석(Youngsuk Jung),강선일(Sunil Kang),오승협(Seung-Hyub Oh),정의승(Eui-Seung Chung) 한국항공우주연구원 2011 항공우주기술 Vol.10 No.2
본 논문은 2008년 8월초부터 2010년 6월 10일 KSLV-I 2차 발사까지 수행된 나로우주센터의 추진제 및 고압가스 품질 관리 결과를 정리한 것이다. 품질관리는 나로우주센터에서 사용되는 모든 고압가스(Air, GHe, GN₂) 및 액화가스(LOX, LN₂)를 대상으로 관련 발사대 및 조립동 모든 장비에 대해 자율시험(AT), 인증시험(QT), 비행시험(FT) 모든 단계에서 수행하였다. 결과로써 총 428회의 간이검사(check analysis), 111회의 전항목검사(full analysis)를 수행하였다. This paper is about the results in Qualification Management activity performed between the Autonomous Test(AT) season(August. 2008) of Launch Complex and the 2nd flight test season(June. 10, 2010) of KSLV-I. All cryogenic fluids(LOX, LN₂) and compressed gases(Air, GN₂, GHe) were qualified by qualification management activity during AT(Autonmous Test), QT(Qualification Test) season for LP(Launch Pad) and LVAB(Launch Vehicle Assembly Building) and FT(Flight Test) season of KLSV-I. As the results, total 428 times of check analysis and 111 times of full analysis were performed.
주행 중 차량 터치 스크린 사용 시의 운전자 무오류 반응 곡선 도출
성진경(Jin Kyeong Sung),정의승(Eui Seung Jung) 대한인간공학회 2021 大韓人間工學會誌 Vol.40 No.6
Objective: The purpose of this study is to derive errorless response curves according to the driver"s body dimensions when the driver uses a touch screen in a manual driving situation. Background: Drivers are exposed to the risk of safety accidents due to the trend that vehicle systems introduce more auxiliary functions during on road driving. Research on the design of touch screen is needed to minimize arriver"s movement required for the touch operation on a touch screen and to ensure safe operations based on driver"s anthropometric capabilities. Method: 25, 50, 75, and 95 percentiles of subjects were recruited based on Korean anthropometric distribution of males and females, and experiments were conducted through a driving simulator with a touch screen. Subjects are asked to touch buttons on a touch screen as an auxiliary task while operating the primary driving task. The location of the touch screen is designated based on the posture and position in which each driver can drive comfortably. The distances were then measured with respect to the shoulder joint, and the angle is designated based on the center point between the hip joints. As an objective indicator, the error rate (%) was measured from the touch screen operations. After each set of touch screen tasks was performed, a discomfort survey, as a subjective indicator, was conducted. Design of experiment was completely randomized. with all three levels of combinations for three independent variables: button size, distance, and angle. As a result, safe or errorless response curves were generated according to subjects" gender and anthropometry. Results: The button size, distance, and angle appeared to affect the error rate. The interactions of Distance × Button size and Distance × Angle were found to have significant effects between variables. As a result of statistical analysis on discomfort, it was confirmed that there were significant differences in button size, distance, and angle, but there was no interaction between independent variables. A trigonometric equation was used to replace the combination of the distance and angle variables with zero error rates (%) in X and Y coordinates. The substituted x and y coordinates are expressed to generate reaction curves over the X and Y coordinates where the center point between the hip joints is zero (0, 0). The errorless response curve at different locations for each human body dimension distribution was confirmed. Conclusion: This experiment is expected to serve as a guidance for the design of touch screens via errorless reaction curves for using the touch screen in a posture and position where the driver can comfortably drive manually. To minimize the movement of the driver and to safely perform the task of using the touch screen, which is an auxiliary task, the position of the touch screen was tested at the height of the steering wheel. As a result of the experiment, an errorless reaction curve at the height level of the steering wheel was derived when using the touch screen according to the driver"s human body dimension distribution. Application: This study can be applied to ensure safety by minimizing the driver movement when using any in-vehicle infortainment systems with a touch screen, where more auxiliary functions are being introduced. It also suggests an errorless or safe location of a touch screen at the height level of the steering wheel.