Objective Testing in Handling Research

Hildebrandt, Tim; Poskocil, A. R.

doi:10.4271/680015

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…By manipulation of tyre [29] also altered tyre pressures to produce three vehicle configurations with 90% yaw rate response times at 64 km/h ranging from tR(90) = 0.28 -0.19 s, as the understeer gradient GKo varied from 92-195 deg/G. Performance in this experiment was evaluated by the maximum speed 3t which an emergency lane change manoeuvre could be executed without exceeding the lane boundaries.…”

Section: Understeer/ouersteermentioning

confidence: 99%

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Sensitivity of Driver-Vehicle Performance to Vehicle Characteristics Revealed in Open-loop Tests

Good

1977

Vehicle System Dynamics

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The advantages of being able to objectively specify desirable vehicle handling characteristics, which can be determined without recourse to closed-loop tests on a prototype vehicle, are widely recognised. This paper reviews thestudies :hat have attempted to find a relationship between closed-loop task performance, and driver subjective opinion, and various steady-state and transient characteristics revealed in open-loop tests of the vehicle. I t is found that the level of definition of these relationships is not sufficient to justify mandatory regulations for vehicle design. However, the basic requirements for steering control sensitivity, and the rapidity and stability of the fixed-control dynamic response of vehicles in normal manoeuvres, are beginning to emerge. Data are particularly lacking for the closed-loop effects of vehicle sideslipping characteristics. free-control responses and vehicle behaviour in limit manoeuvres.

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Section: Understeer/ouersteermentioning

confidence: 99%

“…In the Hildebrandt and Poskocil study [29], referred to in Section 2.2, yaw rate step responses were obtained at 100 km/h and for a 0.4 g steady state. Best performance in an emergence lane change manoeuvre was obtained with tR(90) = 0.21 s and 12.0% overshoot.…”

Section: Transient Yaw Rate Responsementioning

confidence: 99%

Sensitivity of Driver-Vehicle Performance to Vehicle Characteristics Revealed in Open-loop Tests

Good

1977

Vehicle System Dynamics

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Detection of Changes in Automobile Steering Sensitivity

Sweatman

Joubert

1974

Hum Factors

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Twelve drivers detected changes in vehicle steering sensitivity in free maneuvering of limited duration. The changes were produced by diverse means, and drivers' discrimination of changes was determined as just noticeable differences in yaw rate sensitivity. These measures were not significantly different for changes being made in steering ratio, stability factor, and vehicle speed. This result supports the hypothesis that drivers detect changes in yaw rate sensitivity when attempting to discriminate changes in steering sensitivity. Drivers readily detected changes in yaw rate sensitivity, the overall average just noticeable difference being relatively small. It is suggested that yaw rate sensitivity is an inputloutput quantity of fundamental importance.

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Braking and Steering Effort Capabilities of Drivers

Eaton¹,

Dittmeier²

1970

SAE Technical Paper Series

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Objective Testing in Handling Research

Cited by 7 publications

References 3 publications

Sensitivity of Driver-Vehicle Performance to Vehicle Characteristics Revealed in Open-loop Tests

Sensitivity of Driver-Vehicle Performance to Vehicle Characteristics Revealed in Open-loop Tests

Detection of Changes in Automobile Steering Sensitivity

Braking and Steering Effort Capabilities of Drivers

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