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정광태,윤한경 한국기술교육대학교 1998 論文集 Vol.5 No.1
Virtual Reality(VR) is the process of creating virtual environments that present the illusion of real physical events, however humans interact with the real world through their visual, auditory and tactile senses. The tactile perceptions are generally limited in conventional virtual reality system. Recently, several research organizations have been actively studying of haptic perceptions which were known as the force feedback or haptic display in the human computer interaction. Research of these areas include mechanical electrical and computational hardware, and softwares. The mechanical devices, which are known as the manipulandum, are the mechanical interface between the users and the virtual environment including the handle, linkages, actuators and sensors. The manipulandum represents the force feedback according to the users action using a complicate calculation such as the inverse dynamics, but it is very important that the VR system with tactile force feedback has to be shown the real time response. In this study as a preliminary experiment to develope an economical and reliable haptic display system using an application of modified techniques in the visual graphics. The result shows that the texture of surfaces can induce the different forces in terms of the acceleration at the perpendicular direction against the fingers motion. Therefore, there is possibility that the universal tactile model is developed.
Study on Deriving Design Improvement Factors by Quality Function Deployment
Joohyun Sim,Jonghyun Kim,Jaesoo Hong,Keyoungjin Chun,Kwangtae Jung 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.5
Objective: The purpose of this study is improving design of upper body ergometer by Quality Function Deployment (QFD). Background: Although many factors for usability including muscle activity, fatigue, breath and pressure were considered to improve upper body ergometer, design of ergometer that is one of the main factors for usability has not been fully investigated. Method: In this study, we asked to experts about requirement derived from users and gained weighting of valuation attributes using Expert choice 2000. From these data, we analyzed the correlation between weighting of valuation attributes weighting and engineering characteristics. Results: The results showed that the priorty improvement factors are armrest, link-structure of actuator and gap width of under frames. Conclusion: From this study, we expect that these quantified data can be proposed to develop the design of upper body ergometer Application: Priorty design improvement factors were derived by QFD method. We have a plan for developing additional design improvement factors of upper body ergometer based on this study.