Differences of Passenger Unease Emotional Areas, An Experimental Case Study

Recently, it is beginning to be understood that the considering internal state of operator is important. A wrong internal state can lead to wrong control for the system and cause serious accidents. However, less consideration has been given to the operator's internal state in the design of safe control systems, and attention has focused instead on obvious instructions from the operator. For the purpose of considering the internal state of an operator in designing safe control systems, we first focus on an uneasiness feeling, based on the assumption that an uneasiness feeling could lead to wrong control of the system. If the uneasiness feeling can be removed or lessened, it should be possible to improve performance and reduce the occurrence of wrong control of the system. In this paper, we present an experimental environment that provides control for an autonomous car and generates random situations (accidental situations) in a play-model city that looks like an actual urban environment to obtain an immersive feeling. By controlling several physical parameters, we clarify the existence of the uneasiness area in some accidental situations depending on humanly perceivable physical parameters. In the evaluation we find some commonality and some difference in the uneasiness area among persons.