A design philosophy for developing human machine system is proposed in this paper. The fundamental idea of the proposed design is that the system takes an active role in facilitating interaction between human and assist system. In particular, the system is developed to haptically provide necessary driving information to the driver. A key principle is that the system offers a direct interaction with the environment hereby facilitating epistemic probing in a collaborative shared haptic interaction. The system was hypothesized to enable drivers to perform a shift in their cost function by issuing more epistemic probing control actions with the expected goal to reduce the overall frequency within which they find themselves in undesirable situations that require large control actions. The system is evaluated and the results appear to follow the expected changes in behaviour. Data analyses indicated that efficient and rational driving with driving assist system is achieved by the increased opportunity for information transfer between human driver and driving assist system through exchanging forces. The relationship between human driver and intelligent mechanical system in vehicle can be discussed by referring to Rasmussen's hierarchical behaviour model (1983). Autonomous assist systems such as adaptive cruise control (ACC) and lane keep assist system are taking roles to execute the whole tasks from knowledge based decision making to skill based decision making in one certain environment which is assumed a-priori (Inagaki 2006). Warning systems such as collision warning system are designed to assist decisions of knowledge based decision making and rule based decision making by giving cues that are expected to improve the drivers driver's appropriate behaviour in the current situation if the driver obeys the system's decision. On the other hand, the proposed system works on skill based level of decision making. These systems work by augmenting the environmental information that usually sensed visually by providing haptic forces on steering wheel. This augmentation allows drivers to change their driving behaviour. Drivers could drive closer to the wall or estimate the steering timing more easily and more correctly. As a result of those changes, drivers changed their trajectory through the given narrow path experimental configuration. In other words, sensory changes in behaviour level can bring changes at higher decision making such as rule based and knowledge based decision making. It is indicated that a mechanical system that is appropriately designed to exist in the human cognitive cycle has the possibility to not only guide human behaviour but also affect their strategic and tactical decision making. In conclusion, it is confirmed that a new feature of role sharing between human and mechanical system is produced by providing behavioural cues with a mechanical torque system. The produced new relationship between human and mechanical system achieves a positive system that improves performance and lowers effort.
Driving Assist System: Shared Haptic Human System Interaction
2013
8 Seiten, 10 Bilder, 17 Quellen
Aufsatz (Konferenz)
Englisch
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