This work is concerned with the modelling and control of the state of presence of a user in a virtual reality system (VRS). The manner how the state of a user interacting with the VRS is measured by some of its physiological signals is discussed. Based on the user-VRS interaction, a novel feedback control schema to manipulate the user state is proposed. In this, the error between the required and the actual user behavior is used by a controller to select the appropriate stimulus that must be executed by the VRS core scenario to reduce the error. The schema includes the modelling of the presence state by a discrete event strategy based on Petri Nets. Based on the obtained model, the control strategy to select the appropriate stimuli is devised. Finally, some real experiments with a VRS prototype are carried out to show the effectiveness of the proposal.

中文翻译：

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虚拟现实系统中存在状态建模和控制的框架


这项工作涉及虚拟现实系统（VRS）中用户存在状态的建模和控制。讨论了如何通过 VRS 的一些生理信号来测量用户与 VRS 交互的状态的方式。基于用户-VRS 交互，提出了一种新颖的反馈控制模式来操纵用户状态。在这种情况下，控制器使用所需和实际用户行为之间的误差来选择必须由 VRS 核心场景执行的适当刺激，以减少误差。该模式包括通过基于 Petri 网的离散事件策略对存在状态进行建模。根据获得的模型，设计选择适当刺激的控制策略。最后，通过 VRS 原型进行了一些实际实验，以证明该方案的有效性。