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The characteristic velocity stability indicator for passenger cars
Authors:Marcus B  rner  Rolf Isermann
Institution:  a Institute of Automatic Control, Darmstadt University of Technology, Darmstadt, Germany
Abstract:Driver assistance systems have received increased attention as market demands have pushed for improved automotive safety. These systems are designed to aid the driver by preventing any unstable or unpredictable vehicle behaviour. One global indicator for stability and driving conditions could help to manage the control algorithms and driver warning subroutines. Another problem which could be solved by a precise driving situation indicator is evaluating new vehicles during test drives. After a short introduction to a linear lateral vehicle model, an analytical approach for an online calculation of different driving conditions (i.e., stability, understeering, oversteering, and neutralsteering) is given. A characteristic velocity stability indicator is defined, which allows online computation of the present driving condition. Results are then checked against real measurements of a test vehicle.
Keywords:Vehicle dynamics  Parameter variation  Stability analysis  Critical driving situation  Classification
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