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A procedure is developed to identify the driver frequency response functions (FRF) of a serial multi-loop car-following model. It is shown that with a single forcing function both the inner-loop and outer-loop FRF's can be identified, although indirectly. Parameterisation of the driver FRF's is done using the concepts of the simplified precision model developed by McRuer and Krendel in the 1970's...
A mismatch between the goals as interpreted by a designer of a system or a system's interface and the goals of the users can be a cause for problems in system usage and danger to safety. A successful tool for communicating system information between designers, the interface and users is the abstraction hierarchy (AH). Creation of an AH forces designers to assemble knowledge about the system and its...
In a flexible airspace environment the pilot disposes of an increased amount of travel opportunities. At the same time the airspace traffic situation becomes more complex and the aircraft separation assurance task is shifted towards the cockpit. The design paradigm of ecological interface design is applied to support the pilot with the airborne planning of efficient trajectory paths that maintain...
Visual cues that are relevant to safe car driving are generally not supported by redundant non-visual cues, resulting in increased accident risk when visual attention is misallocated. Haptic gas pedal feedback, also referred to as longitudinal impedance, may assist drivers in proper and timely reallocation of their visual attention. A solution is presented for translating the relevant two-dimensional...
This paper introduces four new collision avoidance systems for a remotely-operated helicopter using haptic feedback on the control stick of the operator. To calculate the feedback force artificial risk fields are used, which give an indication about the risk of hitting an obstacle. For each obstacle in the risk field a risk value is calculated, which is transformed to a risk vector, acting as an artificial...
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