Evaluation of Interaction Devices for Ndi Training in Vr: Gamepad Vs. Joystick

Recent advances have led to the development of a virtual simulator to be used for non-destructive inspection (NDI) training of aviation maintenance technicians. The simulator is distinctive in that it has been developed to simulate a general type of NDI job aiding tool (video borescope), as opposed to only simulating a precise model and make. By generating a simulator based on a generic model of the video borescope, the development process must face a common hurdle: determining the best interaction device for the task at hand. In the real world, video borescopes come in a variety of shapes and sizes, as do their interaction devices. In this case, the team must decide upon the best interaction device to be used while ensuring the retention of inspection information from training and facilitating interaction ease of use, all while not permanently engraining the skills that will be needed to control the actual devices when actually used. In short, the interaction device chosen for this simulator should facilitate the trainee's ability to learn NDI techniques without hardwiring simulator control techniques which can vary greatly in the real world. In an effort to determine the most applicable interaction device for this generic training simulator, a study was conducted using expert inspectors and two common interaction devices: a gamepad and a joystick. Performance measures were collected and subjective measures, by way of post-test questionnaires, were considered as well. This paper details the evaluation of a gamepad and a joystick as interaction devices when used with a virtual video borescope simulator for inspection training. Following the findings identified in the study, recommendations are provided for the implementation of such devices.