Experimental Results for a Powertrain LQR-torque Compensator with Backlash Handling

Templin, Peter; Egardt, Bo

doi:10.3182/20091130-3-fr-4008.00020

Cited by 7 publications

(1 citation statement)

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“…The problems of powertrain backlash and flexibility, and the solutions for compensating for them, have been investigated for conventional ICE vehicles. 22–24 However, for an electric vehicle, this problem becomes more complicated. The response of an electric motor is much faster than that of an ICE, 15 and the motor’s regenerative braking torque is usually far larger than that of an engine braking in a conventional car, which results in more severe oscillations.…”

Section: Introductionmentioning

confidence: 99%

Mode-switching-based active control of a powertrain system with non-linear backlash and flexibility for an electric vehicle during regenerative deceleration

Zhang

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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Regenerative braking provided by an electric powertrain is very different from conventional friction braking with respect to the system dynamics. During regenerative decelerations, the powertrain backlash and flexibility excite driveline oscillations, causing the vehicle driveability and the blended brake performance to deteriorate. In this article, system models, including a powertrain model with non-linear backlash and flexibility, and a hydraulic brake system model, are developed. The effects of the powertrain backlash and the flexibility on the vehicle driveability during regenerative deceleration are analysed. To improve the driveability and the blended braking performance of an electric vehicle further, a mode-switching-based active control algorithm with a hierarchical architecture is developed providing compensation for the backlash and the flexibility. The proposed control algorithms are simulated and compared with the baseline strategy under the regeneration braking process. The simulation results show that the vehicle driveability and the blended braking performance can be significantly enhanced by the developed active control algorithm.

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