Test Technologies Contributing to Electrification - 2. Driving Simulator Test Technologies for Establishing Unique Performances of Electric VehiclesFig. 5 Driver seating positionS': Correction amount for the center of rotation for thehexapod2.3 Evaluation results of the effectiveness of new 3.1 Reproduction of growing acceleration feeling of 413. Examples of development applicationsDS technology developmentAURA NISMOFig. 6 DS evaluation resultsHowever, the feeling is different from the actual sensation for motion of the upper structure because this method makes it difficult to feel the diagonal roll pitch sensation and vertical motion. Thus, the upper structure is designed to move along the roll axis for comparison. The center of rotation of the hexapod is transformed using a three-dimensional rotation matrix. S: Seat position and rotation center vectorThe center of rotation is changed based on the above to conduct a comparative evaluation. Some evaluators commented that they could feel the roll better than before, but not to the level of being able to fully reproduce the diagonal motion. This can be attributed to the motion in the pitch direction. The center of rotation of the pitch is expected to change dynamically depending on the situation; however, there is room for improvement in this regard.The motion system improvements and developed motion cueing discussed in this chapter are incorporated and evaluated in comparison with previous specifications. This evaluation is performed by setting up the items necessary for vehicle motion evaluation and assigning a score on a scale of one to five to evaluate the drivers. A score of three is the minimum level at which an evaluation can be made in the DS. Fig. 6 presents the evaluation results, which demonstrate that the overall evaluation is improved because of the DS technology developed in this study, which enabled the system to reproduce motions that are more consistent with those of an actual vehicle. By developing technologies to utilize DS, the evaluation area will be further expanded to include driving environments with disturbances such as uneven road surfaces and crosswinds, as well as special conditions such as snowy roads and race circuits.AURA NISMO fine-tunes the sensation of acceleration. The driving force changes in response to the accelerator operation to provide the expected NISMO acceleration feeling. Currently, control parameters comply with each model in the development of NISMO, and the number of test patterns to evaluate various modes has increased in recent years. This has made it difficult to comprehensively find an optimal solution. Therefore, the DS is employed to achieve the feeling of acceleration emphasized by AURA NISMO by focusing on the human senses and analyzing each element of the feeling of acceleration.Parameter studies were performed on the driving force and feeling of acceleration in response to the accelerator stroke with respect to three elements, “height,” “response,” and “growth” (Fig. 7), of the front and rear G in the DS. The actual vehicle evaluation using these
元のページ ../index.html#46