Automotive Driveline Modelling, Inverse-Simulation and Compensation

A nonlinear automotive driveline model and its inverse simulation are developed. The model contains four inertias comprising engine, clutch, transmission, coupling, and wheels. In this paper both nonlinear effects arising from the clutch and backlash are considered. The backlash in the proposed model is sandwiched between the compliance of the clutch and the compliance of the drive shafts. A basic simulation approach is outlined for obtaining the Horowitz linear time-invariant equivalent (LTIE) of the automotive driveline model by a nonparametric identification using a windowed Fourier transformation (WFT) method. The inverse simulation model is used as a compensator and is shown to achieve calibrated uncertainty reductions over the crossover frequency range. The reduction in the equivalent linear uncertainty of the nonlinearity available from the inverse compensation is demonstrated by the WFT analysis.