Research On Device Achieving Tactile Rebuilding By Pneumatic Approach

Virtual Reality is an advanced man-machine interactive technique that simulates human behaviors of vision, audition and action effectively. At present, virtual reality makes the user feel immersed in the virtual environment, mainly by means of vision and audition. Besides vision and auditory perception, tactility is also important information channels for human to understand and perceive the external world.In this paper, arrayed pneumatic nozzles are used to simulate the tactility when we touch an object in the dimension of point, line or surface. In order to study the influence of various factors to the tactility in this process, ANSYS fluid-structure interaction is adopted in this course.Firstly, analytic model of pneumatic tactile system is established by researching on the finger's tissues and structure, so as to conduct the following analysis of fluid-structure interaction. Secondly, how a single nozzle's whiffing distorts the finger's skin is analyzed by ANSYS of fluid-structure coupling, the situation while touching a ball with finger is analyzed by ANSYS of contact function, then a comparison is made from the two to analyze the affection of nozzle diameter, distance between nozzle and the finger skin, nozzle inlet pressure and other factors to the verity of point-tactile, and some correlative experiments are put up. Thirdly, how a lined nozzles'whiffing distorts the finger's skin is analyzed by ANSYS fluid-structure interaction to analyze the affection of nozzle diameter, nozzle spacing, nozzle inlet pressure and other factors to the verity of line-tactile, and some correlative experiments are put up. Lastly, how the arrayed nozzles'whiffing distorts the finger skin is analyzed by ANSYS of fluid-structure coupling to analyze the affection of nozzle inlet pressure to the verity of area-tactile, and some correlative experiments are put up.In the process of using the pneumatic nozzles to stimulate the tactility of finger, the design-parameters of nozzle are fixed by ANSYS fluid-structure interaction analysis and experimental verification. On this base, a pneumatic device for rebuilding the tactility is designed that can truly reflect the tactility of a finger in the dimension of point, line and area.