Abstract
In the process of braking mode switching of electro-hydraulic brake (EHB) system, there exist time delay and time-varying model parameters in the actual control process, result in the delay of state transfer and controller effectiveness degradation. In response to the above concerns, a torque coordinated control strategy is provided. Firstly, the motor compensation control algorithm is provided to reduce the fluctuation of the actual braking torque as well as considering the braking feeling and energy recover. On top of which, an optimization model incorporating braking feeling and braking energy recover is developed; Secondly, the improved non-dominated sorting genetic algorithm (NSGA-II) is applied to optimize the distribution coefficient to achieve the higher recover energy and stable braking feeling; Furthermore, given the communication delay exists in the compensation control process, which is liable to cause decreasing the quality of braking mode switching, a coordinated delay compensation control strategy consisting of improved compensation module of RBF-Smith, braking mode coefficient solver module, braking force distribution module, and motor compensation control module is introduced. The proposed control algorithm is examined under various time delays and the results indicate that the algorithm effectively tackles communication delay and time-varying model parameters in mode switching stabilization.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call