LANE KEEPING ABILITY OF NORMAL DRIVERS DEPENDING ON SELECTIVELY VARIED YAW RATE DEVIATION IN BRAKING MANOEUVRES

摘要

Automobile manufacturers manage a big effort to ensure driving safety of their cars by testingrnthem in all relevant driving manoeuvres and on different surfaces. Extensive measurementrnequipment is used to describe the driving behaviour in those tests by objective characteristicrnvalues. In straight-line braking and braking while cornering, the measurable yaw raterndeviation is a well known and proven characteristic value to describe the driving safety of arncar in these tests.rnThe goal of this study was to analyze the objective and measurable lane keeping ability ofrnnormal drivers in straight-line braking and braking while cornering with respect to selectivelyrnvaried yaw rate deviations. In a representative experiment, including 100 normal drivers, thernyaw rate deviation of a fully instrumented vehicle was varied by use of a rear wheel steeringrnup to 16 °/s fixed control value. The driver’s task was to follow a given lane, marked withrncones, as exactly as possible after braking. Based on accurately captured path deviations by arnDifferential GPS-System, a progressive loss of lane keeping ability with increasing values ofrnyaw rate deviation could be observed.