Driveline Oscillation Damping for Hybrid Electric Vehicles Using Extended-State-Observer-Based Compensator

Abstract

Driveline oscillation is a significant concern in the context of hybrid electric vehicles (HEVs), because it can adversely affect the vehicles’ sustainability. The reason for this is that the oscillation not only diminishes the longevity of components due to high mechanical contact stress but also results in poor driving comfort, which in turn reduces customer satisfaction. To address the issue of driveline oscillation effectively, two critical challenges, namely the time-varying torque load and driveline backlash, need to be tackled. To this end, this study constructs a control-oriented model of a second-order system plus a dead zone for the driveline backlash. An extended state observer is designed in order to estimate the unmeasurable load torque. As such, an extended-state-observer-based compensator is proposed to suppress driveline oscillations for HEVs. To evaluate the control and observation performance of the proposed extended-state-observer-based compensator, simulation and engine-in-loop experiments are conducted. Results obtained in the time and frequency domains reveal that the proposed control scheme substantially reduces driveline oscillation.

Fast terminal sliding mode control of agricultural robots with permanent magnet synchronous motor servo systems based on an extended state observer for path tracking

“…7,8 To maintain system stability, control gains often need to be reduced, diminishing control performance substantially. 9,10 The Permanent Magnet Synchronous Motor (PMSM) serves as a core control component in agricultural robots, offering advantages such as high efficiency, high power density, and reliability. 11,12 Traditional control strategies for PMSM servo systems often involve Proportional Integral (PI) controllers, 13,14 but they fall short in meeting the increasingly demanding performance requirements in terms of dynamic response, robustness, and control accuracy.…”

Efficient Tuning Scheme of Mode-Switching-Based Powertrain Oscillation Controller Considering Nonlinear Backlash

“…The backlash makes a driveline mechanism discontinuously change between two dynamics: "contact mode" where the mechanical connection is established through the driveline and "backlash mode" where the motor and wheel sides are decoupled because of the clearance crossing. Such nonlinearity forces us to tackle a challenging situation with difficulty in the design of a more complicated active control structure [16]- [21]. Specifically, advanced control schemes are required.…”

“…This was combined with a proportional feedback controller to actively damp driveline oscillations. Another study has used a control-oriented model and an extended state observer [21]. In [17], a control mode switching algorithm was applied to a modelbased driveline oscillation controller.…”