A SUBSPACE-BASED IDENTIFICATION APPROACH FOR THE ANALYSIS OF ROAD VEHICLES YAW DYNAMICS AROUND STEERING-PAD CONDITIONS

摘要

The topic of this paper is the identification of the yaw dynamics of a road vehicle, around a steering-pad condition. Unfortunately, a linearized model cannot be easily computed from the simulator since the working condition is not an equilibrium for the vehicle. Hence a black-box identification approach has been used. The generator of Input/Output data is a detailed simulator of the vehicle (high-order, non-linear). The I/O data-set is constituted by impulse responses from the steering angle (Input) to the slip-side angle of the vehicle (Output). Subspace-Based System Identification methods have been used. This work is a sub-task of a larger project regarding the analysis of the improvements on the maximum lateral acceleration achievable on a modern road vehicle by means of active yaw control and active suspensions.