• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권3호
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• pp.1026-1042
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• 2020

People are increasingly demanding to experience realistic behavior of virtual characters in computer games. In this article, we build a computer model for simulating a bicycle rider's behavior in a virtual riding system. A method to calculate the speed of a bicycle rider is proposed to improve the reality in a virtual riding system. In this method, the property of physical energy is introduced, and the bicycle-riding speed is calculated in real time according to the relationship between the rider's physical energy and bicycle-riding speed. Then based on the analysis of the behavior of a cyclist in a real competition, various behaviors of the virtual rider are designed and a behavior-tree for the virtual bicycle rider is constructed accordingly. On the basis of these, a virtual riding system is developed. The experiments results show that our system can simulate the behavior of a virtual bicycle rider, and thus encourage exercise on a stationary bicycle.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 춘계학술대회논문집
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• pp.842-847
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• 2002

One of the challenging problems with bicycle simulators is to deal with the inherent unstable bicycle dynamics that is coupled with rider's motion. For the bicycle dynamics calculation and the real time simulation, it is necessary to identify the control inputs from the rider as well as the virtual environments. The six control forces of the Stewart platform-based motion system are used for estimation of the rider's action force, which is one of the important control inputs, but of which the direct measurement is impractical. For the effective estimation of the rider's action force, the dynamics model of the motion system is derived incorporated with both analytical and experimental methods and the sliding mode controller with perturbation estimation is developed.

• 한국정밀공학회지
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• 제24권10호
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• pp.137-145
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• 2007

The purpose of this study is developing a virtual bicycle system for improving the ability of postural balance control for adults in various age groups. The system consists of an exercise bicycle that allows tilt in accordance with the postural balance of the subject in the system, a visual display that shows virtual road, and a visual feedback system. The rider of the system tries to maintain balance on the bicycle with a visual feedback of a virtual road while the pedaling speed, the heading direction, and various weight distribution information are updated to the subject as visual feedbacks in the display. A series of experiments were performed with various subjects to find the factors related to postural balance control in the system. The related parameters obtained were weight shift, magnitude of the deviation from the center of the virtual road, and variables related to the movement of the center of pressure. The results found that the ability to control postural balance in the system improved with the presentation of visual feedback information of the distribution of weight. It was also found that the general performance of the subject on balance in the system improved after ten days long training. The results show that the newly developed system can be used for the diagnosis of postural balance as well as for the stimulation of various senses such as vision and somatic sense in the field of rehabilitation training.

• 한국게임학회 논문지
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• 제17권5호
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• pp.89-102
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• 2017

사회적으로 일상생활에서의 건강에 대한 관심이 높아짐에 따라 ICT기술을 스포츠에 적용시키려는 다양한 학문분야의 융합연구들이 진행되고 있다. 본 연구를 통해 지속적으로 균형을 유지해야 주행이 가능한 스마트 바이크를 개발하고, 이를 체험하기 위한 스튜디오 공간의 인터페이스를 설계하여 제안하고자 한다. 스튜디오는 체험을 위한 장치인 스마트 바이크와 1인용 콘텐츠의 몰입을 위한 지오데식 돔 스크린, 그리고 다양한 현실공간의 경치를 즐길 수 있도록 구현된 가상현실 콘텐츠로 구성되어져 있다. 스마트 바이크를 위한 1인용 체험공간에 최적화된 스튜디오의 설계 및 제작을 시도하였다는 점에서 의의가 있으며, 확장 가능성이 높은 인터페이스를 가지기 때문에 스포테인먼트를 위한 체험형 콘텐츠에 적용이 가능할 것으로 기대해 볼 수 있겠다.