Sueharu Nagiri

Active Safety Performance Analysis of Man-Vehicle System due to Driver's Maneuver in Emergency Avoidance.

Taking driver-vehicle closed loop system into account, active safety performances in emergency situation were analysed and the evaluation methods were proposed. Under such critical conditions, ordinary drivers avoiding maneuvers were examined using a motion-type driving simulator. According to the drivers maneuvers, a database of driving operational characteristics was constructed and a mathematical model of drivers operation was also derived. The performance of the driver-vehicle system was predicted by computational simulations. The agreements with the predicted performance by the simulation were verified from experimental results in emergency avoidance. Assuming the sudden change of road surface to slippery situation, the effect of an assistant control of steering was also estimated from both model simulations and experiments by the driving simulator.

Driver Behavior Model in Emergency Situations. On Basic Structure of A Driver Model.

The purpose of this paper is to show basic structure of a driver model that simulate drivers behaviors in emergency situations. The features of this model are that the parameters are systematically set up without trial and error by using predictive control method and a drivers internal model is introduced and a minimum lateral jerk line is applied as target course. The results of experiments to decide the structure, the internal model and predictive time, are shown. The model was applied to simulate drivers behaviors in lane change maneuver. It follows from the results that the driver model adequately simulate general and expert drivers behavior in experiment.

A Driver Behavior Model in Emergency Situations. An Application of the Driver Model to Cases of Obstacle Avoidance and Sudden Change of Vehicle's Characteristics.

The purpose of this paper is to propose a driver model in emergency situations. The emergency situations are cases that an obstacle ran out of the lane and friction between tire and road surface changed suddenly. So far it has not been clarified yet the influences of slip angle of on the drivers behavior and modeling of the combined use of steering and braking in the situations. Results of computer simulations using the driver model are correspond to driver behaviors obtained by experiments with driving simulators. It is verified from the results that the driver model is useful tool that predict behaviors of man-vehicle system in emergency situations.