Driveline Backlash and Half-shaft Torque Estimation for Electric Powertrains Control

2018-01-1345

04/03/2018

Features
Event
WCX World Congress Experience
Authors Abstract
Content
The nonlinear behavior of automotive powertrains is mainly due to the presence of backlash between engaging components. In particular, during tip-in or tip-out maneuvers, backlash allows the generation of impacts that negatively affect the vehicle NVH performance. Due to the faster response of electric motors with respect to conventional internal combustion engines, this problem is even more critical for electric vehicles. In order to employ numerical optimal control methods for backlash compensation, the system states have to be known. In this paper, an electric powertrain is modeled as a two-mass oscillator with lumped backlash. This model estimates the system states when in no-contact mode while a Kalman filter that relies only on commonly available speed measurements is active in the contact phase. The powertrain model is validated using experimental data collected during vehicle testing and the online estimated half-shaft torque is shown. In addition, simulations are performed to illustrate that the system states can be properly determined with the proposed estimator.
Meta TagsDetails
DOI
https://doi.org/10.4271/2018-01-1345
Pages
9
Citation
Guercioni, G., Galvagno, E., Tota, A., Vigliani, A. et al., "Driveline Backlash and Half-shaft Torque Estimation for Electric Powertrains Control," SAE Technical Paper 2018-01-1345, 2018, https://doi.org/10.4271/2018-01-1345.
Additional Details
Publisher
Published
Apr 3, 2018
Product Code
2018-01-1345
Content Type
Technical Paper
Language
English