The door handle automatically protrudes from its retracted position when the door is unlocked by the user using a remote key. The user grasps the protruding door handle, opens the door, and enters the driver's seat. The door handle automatically retracts from its protruding position when the user starts driving.⬇⬇⬇Test Technologies Contributing to Electrification - 3. Virtual Reality Test Technologies for Evaluating Quality of New Mechanical Parts Without PrototypingFig. 2 Functions assumed for a retractable door handle The user approaches the door of the driver's seat.(example)to avoid losing the impression of high quality from the deviation. Deviation of time-series change in the amount of protrusion during automatic protrusion and retraction: front and rear ends of a door handle.The impression received from the movement of the door handle is evaluated for several specifications with different amounts of variation in its automatic movement to determine the relationship between the variation in its automatic movement (Fig. 3) and the impression of high quality.The environment for evaluating impressions from variations in the automatic movement of a door handle requires (1) the reproduction of slight variations in its automatic movement; and (2) the reproduction of the timing and appearance (viewpoint, field of view, and size of the object to be viewed) when viewing its movement during use.(1) A mechanism dedicated to the evaluation is required when that reproduce combinations of deviations in the door handle protrusion timing (combinations of the amount of deviation between the front and rear ends of the door handle). Such a mechanism is required when using a physical mockup because of the design tolerances presented in Fig. 3. This makes completing the evaluation within the development timeline difficult. By contrast, the difference in the movement of different design parameters can be displayed in three-dimensional images in a short time with a VR evaluation environment that reproduces a virtual space.(2) The impression of the movement of parts, as in the real world, cannot be evaluated without reproducing Fig. 3 Variation in the automatic movement of a door handle (example)protrudes after the door is opened while exiting. The door handle then automatically retracts when the door is closed and locked (Fig. 2).The impression people receive from the automatic movement of a door handle is examined to determine whether it can provide customers with emotional values such as a sense of hospitality and quality. The following example illustrates how variations in the automatic movement of a door handle can affect the sense of quality.The timing of automatic protrusion or retraction may be inconsistent between the front and rear ends because actual parts have certain structural design tolerances. The time-series change in the amount of protrusion during automatic protrusion and retraction varies depending on the design tolerance of the parts, as indicated in Fig. 3. The extent to which the variation in the time series changes during protrusion is considered 46evaluating multiple specifications
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