基于主动悬架的整车车身姿态控制策略研究
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江苏大学汽车与交通工程学院 镇江 212013

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TH16

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国家自然科学基金(52072157)项目资助


Research on the whole vehicle attitude control strategy based on active suspension
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School of Automative and Traffic Engineering, Jiangsu University,Zhenjiang 212013, China

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    摘要:

    针对车辆在行驶过程中产生的车身姿态失衡问题,提出了一种基于姿态补偿的主动悬架整车车身姿态控制策略。在建立整车七自由度动力学模型,并基于随机路面进行实车试验验证整车模型的准确性的基础上,构建了模型预测控制器,根据状态观测器估计的各信号求解各个悬架的垂向控制力以衰减车辆垂向振动;进而以模糊算法为基础设计车身姿态补偿控制策略,使电磁直线作动器产生反作用力以抑制车身姿态恶化。选取某型号直线电机作为主动悬架力源,将垂向控制力与姿态补偿力合并得到各悬架控制所需电磁作动力,以此计算电机所需目标电流,并通过MATLAB/Simulink平台对主动悬架系统进行仿真。仿真结果表明:所提出的基于主动悬架的整车车身姿态控制策略在不影响车辆垂向控制效果的基础上,能够大幅降低车辆质心侧倾角和俯仰角的均方根值,车身姿态得到有效控制。

    Abstract:

    An active suspension body attitude control strategy based on attitude compensation is proposed to address the body attitude imbalance problem generated during vehicle driving. Based on the establishment of a seven-degree-of-freedom dynamics model for the vehicle and the verification of the accuracy of the vehicle model based on random road tests, a model predictive controller is constructed to solve the vertical control force for each suspension based on the signals estimated by the state observer to attenuate the vehicle droop vibration; and then the vehicle attitude compensation control strategy is designed based on a fuzzy algorithm to cause the electromagnetic linear actuator to generate a reaction force to suppress the body attitude deterioration. A certain type of linear motor is selected as the active suspension force source, and the electromagnetic force required for suspension control is obtained by combining the vertical control force with the attitude compensation force, which is used to calculate the target current required by the motor, and the active suspension system is simulated by the MATLAB/Simulink platform. The simulation results show that the proposed active suspension control strategy based on attitude compensation can significantly reduce the root mean square values of the vehicle centre of mass and pitch angle without affecting the vehicle droop control effect, and the body attitude is effectively controlled.

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潘公宇,范菲阳,冯鑫.基于主动悬架的整车车身姿态控制策略研究[J].电子测量技术,2024,47(2):79-88

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  • 在线发布日期: 2024-04-30
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