Multi-DOFs Motion Platform for Virtual Reality
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This research presents to develop a new concept and design of a multi-degree of freedom (DOF) motion platform capable of controlling 3 DOFs rotational and 3 DOFs translational motion to provide unlimited range of motion for virtual reality (VR) based on spherical wheels. Multi-DOF motion platforms have been developed for various applications such as motion simulators and game industry. In addition, motion recognition is one of main features for VR with visual display. However, existing motion platforms have critical limits of range of motion in motion realization due to mechanical linkages and their actuating mechanism. In addition, unnatural motion control may cause mismatch in VR environment. The motion platform developed in this paper can provide 6 DOFs motion and in particular, unlimited range of rotational motion without motion singularity. The design is compact and lightweight offering fast speed of response. Kinematic and dynamic analysis of the platform are investigated to provide a basis of motion control in an open-loop. Performance of motion control is demonstrated in real scaled size (ride on platform). The experimental results show that the platform is successfully capable of multi-DOF motion control and can be utilized for various applications in future demands.
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