دانلود رایگان مقاله شبیه ساز قدرت صندلی چرخدار واقعیت مجازی

Abstract

Virtual Reality based driving simulators are increasingly used to train and assess users’ abilities to operate vehicles in a controlled and safe way. For the development of those simulators it is important to identify and evaluate design factors affecting perception, behaviour, and driving performance. In an exemplary power wheelchair simulator setting we identified the three immersion factors display type (head-mounted display v monitor), ability to freely change the field of view (FOV), and the visualisation of the user’s avatar as potentially affecting perception and behaviour. In a study with 72 participants we found all three factors affected the participants’ sense of presence in the virtual environment. In particular the display type significantly affected both perceptual and behavioural measures whereas FOV only affected behavioural measures. Our findings could guide future Virtual Reality simulator designers to evoke targeted user behaviours and perceptions.

4.5. Limitations and future works

Our study was conducted with (mainly) college-age students. This sample has likely experienced virtual reality applications before, has good cognitive function, and is more likely to have used computers and computer games before. Also, they are not the main targeted user group for this particular vehicle. These factors might have influenced users’ perception and behaviour. Future research should consider a broader and more targeted sample or even actual PWC users. A potential methodological concern is the possible influence of a learning effect generated by repeating the task. The experiment was designed, however, to greatly minimise such potential effects by: 1) mixing between-subject and within-subject designs; 2) randomising and counterbalancing, and; 3), the unawareness of the participants of the task repetitions because of our particular task design. Another limitation is that the experiment tested only three factors with two levels each thus did not fully reflect all the simulator features that may influence perception or behaviour. However, we based our choice on issues reported by therapists as well as by comprehensive literature review. Future research could investigate other factors such as VE colours, different avatar appearances, and different visualisation techniques, for example bird’s eye views etc.