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Abstract

This article will present the results of comparative tests of the functionality of new type of a universal steering wheel, intended to use as HMI to drive a so-called ECO car by both disabled and ablebodied people. The already mentioned ECO car would be characterized, among other things, by electric drive and "steer by wire" system (which is of particular importance in designing adaptive human-vehicle interface). The car was designed as part of the "Eco-Mobility" project implemented under the Innovative Economy Operational Programme co-financed from European Regional Development Fund. The prototype of the car and some of its functions were demonstrated on the "eco-mobilnosc" website [4,2].An able-bodied person is sitting in a driver's seat (in the car's equipment), while the disabled person can drive the car sitting in their own wheelchair. The functionality feature of the steering wheel which is distinctive from the classic steering system (classic steering wheel + pedals) is the opportunity to drive the vehicle using only hands (without using legs). The steering wheel developed as part of the ECO Mobility project is part of a system that allows a disabled person to use a car completely on their own (without any help from others). The same car can also be used by able-bodied people -hence the notion of its "universality".ECO steering wheel is essentially adapted to drive cars with Steerby-wire system [13,6]. This solution makes it possible to program the steering angle corresponding to the maximum steering angle of the front wheels. There is a possibility to adjust the so-called melt steering ratio (obviously not while driving). In these studies, there were two different combinations included: 180º to 35º and 120º to 35º. These changes are intended to limit the angle of rotation of the steering Maciej KozłowSKiAssessment of sAfety And ride quAlity bAsed on compArAtive studies of A new type of universAl steering wheel in 3d simulAtors ocenA bezpieczeństwA i jAkości jAzdy nowego typu kierownicy uniwersAlnej nA podstAwie bAdAń porównAwczych nA symulAtorAch 3dThe aim of this study was to investigate how a change in the design of steering wheel may affect the safety and quality of driving by the driver. The object of the research was a new universal steering wheel enabling driving the car using only hands -intended for use by both able-bodied and disabled people. In order to assess the functionality of the steering wheel, a comparative study was carried out, with respect to a classic steering wheel. The study was performed using a dynamic simulator, with methodology developed especially for this experiment, introducing the so-called reference trajectory. The use of this trajectory allowed the introduction of qualitative criteria of road tests based on a measure of distance. The article presents the defined criteria. Drives of 30 drivers in "route" and "slalom" type road test were carried out. The article discusses the results of the slalom test. In this test, the driver's task was to maintain the reference trajectory...

Stochastic simulation and validation of Markov models of real driving cycles

“…The driving cycle comparative criteria are defined in terms of time, frequency or probabilistic process values (compliance tests). The method of generating pseudo-random realizations of the stochastic process modeling driving tests in accordance with the criterion of similarity of the amplitude-frequency characteristics of speed in test conditions and the actual use of the vehicle was proposed in [3]. The procedures combining stochastic processes and statistical methods in the analysis of vehicle motion dynamics equations represented by velocity and acceleration were based on the theory of Markov models [7,8].…”