On-board electric powertrain control for the compensation of the longitudinal acceleration oscillations caused by road irregularities

IF 4.5 1区工程技术 Q1 ENGINEERING, MECHANICAL

Mechanism and Machine Theory Pub Date : 2024-08-29 DOI:10.1016/j.mechmachtheory.2024.105759

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引用次数: 0

Abstract

Road irregularities affect vehicle comfort by causing vertical and longitudinal acceleration oscillations. While the current ride comfort enhancement solutions are based on the compensation of the vertical acceleration of the sprung mass, the compensation of the longitudinal dynamics excited by road irregularities has been successfully explored only for in-wheel powertrains. The scope of this study is to demonstrate that also on-board electric powertrains with torsional dynamics of the half-shafts have the potential for effective compensation, thanks to the road profile preview. This paper presents a proof-of-concept nonlinear model predictive controller (NMPC) with road preview, which is assessed with a validated simulation model of an all-wheel drive electric vehicle. Three powertrain layouts are considered, with four in-wheel, four on-board, and two on-board electric machines. The control function is evaluated along multiple manoeuvres, through comfort-related key performance indicators (KPIs) that, for the four on-board layout along a road step test at 40 km/h, highlight >80% improvements. Finally, the real-time implementability of the algorithms is demonstrated, and preliminary experiments are conducted on an electric quadricycle prototype, with more than halved oscillations of the relevant variables.

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用于补偿路面不平造成的纵向加速度振荡的车载电动动力总成控制装置

路面不规则会引起垂直和纵向加速度振荡，从而影响车辆的舒适性。目前的驾乘舒适性提升方案都是基于对弹簧质量垂直加速度的补偿，而对路面不平顺引起的纵向动力的补偿只在轮内动力系统中进行了成功的探索。本研究的目的是证明，借助路面轮廓预览，具有半轴扭转动力学的车载电动动力系统也具有有效补偿的潜力。本文介绍了一种具有道路预览功能的概念验证非线性模型预测控制器（NMPC），并通过全轮驱动电动汽车的验证仿真模型对其进行了评估。考虑了三种动力总成布局，包括四个轮内、四个车载和两个车载电机。通过与舒适性相关的关键性能指标（KPIs），对控制功能进行了多重操纵评估，其中四车载布局在时速 40 公里的道路阶梯测试中突出表现出 80% 的改进。最后，演示了算法的实时可实施性，并在电动四轮车原型上进行了初步实验，相关变量的振荡减少了一半以上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanism and Machine Theory 工程技术-工程：机械

CiteScore

9.90

自引率

23.10%

发文量

450

审稿时长

20 days

期刊介绍： Mechanism and Machine Theory provides a medium of communication between engineers and scientists engaged in research and development within the fields of knowledge embraced by IFToMM, the International Federation for the Promotion of Mechanism and Machine Science, therefore affiliated with IFToMM as its official research journal. The main topics are: Design Theory and Methodology; Haptics and Human-Machine-Interfaces; Robotics, Mechatronics and Micro-Machines; Mechanisms, Mechanical Transmissions and Machines; Kinematics, Dynamics, and Control of Mechanical Systems; Applications to Bioengineering and Molecular Chemistry