• 제목/요약/키워드: virtual reality simulator

검색결과 218건 처리시간 0.025초

가상현실을 이용한 실시간 차량 그래픽 주행 시뮬레이터 (A Real-Time Graphic Driving Simulator Using Virtual Reality Technique)

  • 장재원;손권;최경현;송남용
    • 한국정밀공학회지
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    • 제17권7호
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    • pp.80-89
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    • 2000
  • Driving simulators provide engineers with a power tool in the development and modification stages of vehicle models. One of the most important factors to realistic simulations is the fidelity obtained by a motion bed and a real-time visual image generation algorithm. Virtual reality technology has been widely used to enhance the fidelity of vehicle simulators. This paper develops the virtual environment for such visual system as head-mounted display for a vehicle driving simulator. Virtual vehicle and environment models are constructed using the object-oriented analysis and design approach. Based on the object model, a three-dimensional graphic model is completed with CAD tools such as Rhino and Pro/ENGINEER. For real-time image generation, the optimized IRIS Performer 3D graphics library is embedded with the multi-thread methodology. The developed software for a virtual driving simulator offers an effective interface to virtual reality devices.

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가상현실 기반의 차량 시뮬레이터의 현실감 향상에 관한 연구 (A Study on Improving the Reality of the Vehicle Simulator Based on the Virtual Reality)

  • 최영일;권성진;장석;김규희;조기용;서명원
    • 대한기계학회논문집A
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    • 제28권8호
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    • pp.1116-1124
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    • 2004
  • In these days, a vehicle simulator has been developed with a VR(Virtual Reality) system. A VR system must provide a vehicle simulator with natural interaction, sufficient immersion and realistic images. In addition, a VR system must present a driver with the realistic driving situation. To achieve these, it is important to obtain a fast and uniform rendering performance regardless of the complexity of virtual worlds. In this paper, the factors to improve the reality for the VR based vehicle simulator have been investigated. For the purpose, the modeling and the rendering methods which offer an improved performance for complex VR applications as the 3D road model have been implemented and verified. Then, we experiment on the influence of graphic and sound factors to the driver, and analyze each result for improving the reality such as the driver's viewport, the form of texture, the lateral distance of the side object, and the sound effect. These factors are evaluated on the driving system which is constructed for qualitative analysis. The research results could be used for improving the reality of the VR based vehicle simulator.

비주얼 시뮬레이터를 이용한 KALIMER가상현실 구현 (Simulator development Using Information Visualization Into Virtual Reality Laboratory for KALIMER)

  • Kwan-Seong Jeong;Young-min Kwon;Yong-Bum Lee;Won-Pyo Chang;Do-Hee Hahn
    • 한국전자거래학회지
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    • 제6권2호
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    • pp.13-24
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    • 2001
  • The Real-Time Best-Estimate simulator NPA4K is being developed for providing an efficient nuclear power, KALIMER, simulation environment for transient safety analyses using information visualization. The advanced features of NPA4K simulator are the Once-Through Running Environment, Functionalities of displaying the several X-Y Plot on one system, and Multi-thread Processing, The objective of NPA4K simulator is ta realize the Virtual Reality Environment through Network and Internet technology in Nuclear Power Plants.

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자동차 시뮬레이터의 가상환경 구성에 대한 연구 (Construction of Virtual Environment for a Vehicle Simulator)

  • 장재원;손권;최경현
    • 한국자동차공학회논문집
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    • 제8권4호
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    • pp.158-168
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    • 2000
  • Vehicle driving simulators can provide engineers with benefits on the development and modification of vehicle models. One of the most important factors to realistic simulations is the fidelity given by a motion system and a real-time visual image generation system. Virtual reality technology has been widely used to achieve high fidelity. In this paper the virtual environment including a visual system like a head-mounted display is developed for a vehicle driving simulator system by employing the virtual reality technique. virtual vehicle and environment models are constructed using the object-oriented analysis and design approach. Accordint to the object model a three dimensional graphic model is developed with CAD tools such as Rhino and Pro/E. For the real-time image generation the optimized IRIS Performer 3D graphics library is embedded with the multi-thread methodology. Compared with the single loop apprach the proposed methodology yields an acceptable image generation speed 20 frames/sec for the simulator.

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VIRTUAL REALITY SHIP SIMULATOR

  • Yim, Jeong-Bin
    • 한국항해항만학회:학술대회논문집
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    • 한국항해항만학회 2000년도 Proceeding of CIN-KIN Joint Symposium 2000 on M.E.T. Under STCW 78/95 and SINO-KOREA MARITIME CONTACT IN MID-CENTURIES
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    • pp.93-105
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    • 2000
  • This paper describes prototype Virtual Reality Ship Simulator (VRSS) that we have recently developed next-generation training equipment based on the virtual reality (VR) technology. The inherent defects of conventional ship simulators are enormous costs and difficult system upgrade due to the system construction, such as large mock-up bridge system, wide visual presentations, In this paper, to cope with those problems, we explored VR technology that can give realistic environments in a virtual world. Then we constructed prototype VRSS system, which is, consists of PC-based human sensors, and Databases set having 3D object models and coefficients of Head Related Transfer Functions (HRTFs). 3D-WEBMASTER authoring tool was used as Virtual Reality Modeling Language (VRML). Using the VRSS system, we constructed Port an Passage Simulator for the harbor of INCHON in Korea, and Ship and Sea State Simulator for an arbitrary given sea environmental states by user. Through many simulation tests, we testified the efficiency of developed prototype VRSS by subject assessment with five participants. Then, we present results on the simulation experiments and conclude with discussion of evaluation results.

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가상현실 기반의 체감형 스노우보드 시뮬레이터 개발 (Development of a Tangible Snowboard Training Simulator based on Virtual Reality)

  • 박창훈
    • 한국게임학회 논문지
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    • 제14권4호
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    • pp.87-94
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    • 2014
  • 최근 골프 시뮬레이터의 급성장과 함께 체감형 스포츠 시뮬레이터에 대한 관심이 높아지고 있다. 우리는 가상현실 기술을 이용하여 초보자 대상의 스노우보드 시뮬레이터를 개발하고자 한다. 본 논문은 스노우보드 훈련을 위해 상호작용하는 가상코치와 현실감 높은 가상의 스포츠 훈련환경을 제안한다. 가상코치는 5가지 기본동작에 대한 직관적인 안내와 맞춤형 코칭 피드백을 제공한다. 가상 훈련환경은 보다 사실적인 훈련 상황을 생성하기 위하여 입체영상 시스템과 모션플랫폼을 이용한다. 우리는 가상현실이 태권도, 야구, 양궁 등의 많은 스포츠 종목에서 훈련 지원을 위해 이용될 것으로 기대된다.

Effects of Virtual Reality Horse Riding Simulator Training Using a Head-Mounted Display on Balance and Gait Functions in Children with Cerebral Palsy: A Preliminary Pilot Study

  • Kim, Hae Won;Nam, Ki Seok;Son, Sung Min
    • The Journal of Korean Physical Therapy
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    • 제31권5호
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    • pp.273-278
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    • 2019
  • Purpose: The purpose of this study was to investigate the effects of three-dimensional virtual reality horse riding simulator training using a head-mounted display on gait and balance in children with cerebral palsy. Methods: Ten children with cerebral palsy were randomly assigned to the horse riding simulator (HRS) group (n=5) or the horse riding simulator with virtual reality (HRSVR) group (n=5). To evaluate balance, center of gravity (COG) sway velocity and total sway distance of each group were assessed using the Wii balance board, and gait speed and stride length of each group were assessed using a gait analysis system. Results: Intra-group comparisons between pre- and post-intervention measures revealed that there were significant changes in all gait and balance variables such as stride length, gait velocity, COG sway velocity and COG sway distance in the HRSVR group (p<0.05). In the HRS group, there were significant changes in all variables except stride length (p<0.05). In addition, inter-group comparisons showed significant differences between the two groups in stride length, gait velocity and COG sway distance except COG sway velocity (p<0.05). Conclusion: The findings of this study suggest that horse riding simulator training combined with 3D virtual reality can be a new positive therapeutic approach for improving functional performance in children with cerebral palsy.

비행 VR 시뮬레이터를 위한 혼합 현실 환경의 구축 (Building Mixed Reality System for a VR Flight Simulator)

  • 이종환;한순흥
    • 한국시뮬레이션학회논문지
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    • 제13권2호
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    • pp.45-52
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    • 2004
  • This paper presents a prototype visualization system of mixed reality for a VR flight simulator. The chroma key technique is used to build the mixed reality model for a VR flight simulator. The Daedeok science town can be visualized in real time according to the rider control. He can also see his own hand/foot operating the control stick/rudder as well as virtual environment projected to the blue-screen using a video-see-through HMD.

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가상현실 선박 시뮬레이터의 시스템 설계 (The System Design of Virtual Reality Ship Simulator)

  • 임정빈;김현종
    • 해양환경안전학회:학술대회논문집
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    • 해양환경안전학회 1999년도 춘계학술발표회논문집
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    • pp.7-17
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    • 1999
  • 가상 현실 기술을 적용한 선박 시뮬레이터 시스템의 설계 기법에 관하여 기술한다. 일반적으로 선박은, 선장, 항해사, 도선사, 조타수 등의 다중 작업자에 의해 조종된다. 이 연구에서는 이러한 선박의 특수 환경을 고려하여 가상 현실 선박 시뮬레이터에 적합한 다중 크라이언트-서버 네트워크와 하드웨어 구성을 제안하였다.

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가상현실 루지 시뮬레이터의 동작과 영상정보별 인체 근육활성도 분석 (Muscular Activity Analysis in Lower Limbs from Motion and Visual Information of Luge Simulator based Virtual Reality)

  • 강승록;김의령;김경;봉혁;권대규
    • 한국정밀공학회지
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    • 제32권9호
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    • pp.825-831
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    • 2015
  • In this paper, capture motion and visual information from a virtual reality luge simulator to analyze muscular activity in the lower limbs. The Luge Simulator consists of a motion platform with a pneumatic module for weight distribution. We recruited luge athletes and healthy subjects and made real-time surface EMG measurements to estimate the muscular activity in the lower limbs according to the motion protocol of a simulator, and a test was conducted for each subject. The results indicated that the rectus femoris had the highest muscular activity according to the level of the slope and velocity of the luge. The soleus muscle showed a high level of activity during a turn in the luge according to the direction. We found that the development of a virtual reality sports simulator based on physical reaction results could bring positive effects to optimize reality and human cenesthesia.