PSO-based model identification of a full-scale CVT drivetrain

Torque transfer characteristics of the drivetrain of a production continuously variable transmission (CVT) vehicle is identified based on a particle swarm optimization (PSO) technique. The torque transfer characteristics from the CVT input shaft to the driveshaft is described by a simple nonlinear model: a single degree-of-freedom vibration model with a clearance. Based on the full-scale experimental data, the model parameters are identified by a data correction method and PSO. The simulated driveshaft torque shows good agreement with the measured torque from the experiment.