论文标题

RHONN启用了启用的非线性预测控制,用于横向动力学稳定在轮运动驱动的车辆上

RHONN Modelling-enabled Nonlinear Predictive Control for Lateral Dynamics Stabilization of An In-wheel Motor Driven Vehicle

论文作者

Chen, Hao, Zhang, Junzhi, Lv, Chen

论文摘要

具有快速响应和控制分配的灵活性,带有轮毂电动机的电动汽车是实施高级车辆动力控制的好平台。在轮毂电动机驱动车辆(IMDV)的许多主动安全功能中,横向稳定性控制是一种关键技术,可以通过扭矩矢量实现。为了进一步提高IMDV的横向稳定性性能,在本文中,基于复发性的高阶神经网络(RHONN)建模方法,提出了新型数据驱动的非线性模型预测控制(NMPC)。首先,开发了新的Rhonn模型来代表车辆的非线性动态行为。与传统的基于物理的建模方法不同,RHONN模型仅需要数据并形成高阶多项式。基于RHONN模型,对车辆偏航率和侧滑角的稳态响应进行了迭代优化,并将其设置为低级控制器的控制目标,旨在提高系统鲁棒性。此外,非线性模型预测控制器是基于RHONN设计的,该控制器有望提高在退化的地平线控制过程中的预测准确性。此外,制定了一个约束优化问题,以得出车辆横向动力学稳定所需的偏航矩。最后,在CARSIM/SIMULINK模拟环境中,在IMDV上验证了开发的基于RHONN的非线性MPC的性能。验证结果表明,开发的方法的表现优于常规方法,并进一步改善了系统的稳定边距。它能够在各种驾驶场景下增强IMDV的横向稳定性性能,从而证明了所提出的方法的可行性和有效性。

Featuring the fast response and flexibility in control allocation, an electric vehicle with in-wheel motors is a good platform for implementing advanced vehicle dynamics control. Among many active safety functions of an in-wheel motor driven vehicle (IMDV), lateral stability control is a key technology, which can be realized through torque vectoring. To further advance the lateral stabilization performance of the IMDV, in this paper a novel data-driven nonlinear model predictive control (NMPC) is proposed based the recurrent high-order neural network (RHONN) modelling method. First, the new RHONN model is developed to represent vehicle's nonlinear dynamic behaviors. Different from the conventional physics-based modelling method, the RHONN model only needs data and forms high-order polynomials. Based on the RHONN model, the steady-state responses of vehicle's yaw rate and sideslip angle are iteratively optimized and set as the control objectives for low-level controller, aiming to improve the system robustness. Besides, a nonlinear model predictive controller is designed based on the RHONN, which is expected to improve the prediction accuracy during the receding horizon control. Further, a constrained optimization problem is formulated to derive the required yaw moment for vehicle lateral dynamics stabilization. Finally, the performance of the developed RHONN-based nonlinear MPC is validated on an IMDV in the CarSim/Simulink simulation environment. The validation results show that the developed approach outperforms the conventional method, and further improves the stable margin of the system. It is able to enhance the lateral stabilization performance of the IMDV under various driving scenarios, demonstrating the feasibility and effectiveness of the proposed approach.

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