An investigation on the integrated human driver model for closed-loop simulation of intelligent safety systems

This paper presents an integrated human driver model for a closed-loop simulation of the intelligent safety system. A lateral human driver model was developed to represent the steering behavior of a human driver using the finite preview optimal control method. A longitudinal human driver model represents a human driver’s throttle and brake control behavior relative to the preceding vehicle motion. It computes the desired acceleration and generates throttle/brake inputs to maintain vehicle-to-vehicle clearance at a desired level or to control vehicle speed. An integrated driver model was been developed using the longitudinal and lateral driver models to represent the behavior of a human driver in alternative driving situations, that is, vehicle following, lane following, emergency braking, and so on. Simulation studies were conducted using "Carsim" model which is validated using vehicle test data. Results showed that a human driver’s behaviors could be well represented by the integrated human driver model presented in this paper. Closed-loop simulations of a unified chassis control system with the integrated human driver model were conducted.