摘要
车辆行驶时,车辆振动通过轮胎作用于路面,引起路面振动,路面振动作为二次激励会进一步加剧车辆振动,商用车簧载质量较高,这种车路间的耦合振动尤为明显。为提升商用车的行驶平顺性,以使用阻尼连续可调减振器的重载商用车为研究对象,将路面二次激励引入悬架系统中,将悬架系统的振动控制问题转化为带约束的扰动抑制问题并通过模型预测控制求解,然而,模型预测控制庞大的计算量成为实时控制的难题。提出一种改进的模型预测控制,对比分析传统模型预测控制和改进模型预测控制在1/4车辆模型上的振动控制表现,相较于应用传统模型预测控制的半主动悬架,应用改进模型预测控制的半主动悬架的车身加速度和轮胎动变形分别降低27%和18%,虽然悬架动行程有所恶化,但系统约束仍将其控制在一个安全范围内。仿真结果表明,改进模型预测控制在保证安全性的前提下,可以显著改善重载商用车的行驶平顺性。
When a vehicle is in operation,the vibrations of the vehicle are transmitted to the road surface through the tires,causing road surface vibrations.As a secondary excitation,road surface vibrations can further exacerbate the vehicle′s vibrations,particularly for heavy-duty commercial vehicles with high spring-loaded mass.To improve the driving smoothness of commercial vehicles,this study focused on heavy-duty commercial vehicles equipped with continuously adjustable dampers.The secondary excitation from the road surface was integrated into the suspension system,and the vibration control problem of the suspension system was transformed into a constrained disturbance suppression problem,which can be solved by using model predictive control(MPC)approach.However,the massive computer time consuming of MPC posed a challenge for real-time control.In this paper an improved MPC method was proposed and the performances of traditional and the improved MPC in controlling vibrations of a 1/4 vehicle model were compared.The simulation results demonstrate that compared to the semi-active suspension employing traditional MPC,the vehicle acceleration and tire dynamic deformation are reduced by 27%and 18%,respectively when the improved MPC is applied to the semi-active suspension.Although there is a slight degradation in the dynamic suspension travel,the system constraints can still keep it within a safe range.The improved MPC can significantly improve the ride smoothness of heavy-duty commercial vehicles under the premise of ensuring the safety of vehicle′s operation.
作者
孙丽琴
陈必开
陈瀚阳
SUN Liqin;CHENG Bikai;CHENG Hanyang(School of Automotive and Transportation Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China)
出处
《噪声与振动控制》
北大核心
2025年第5期146-152,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51975254)。
关键词
振动与波
路面二次激励
阻尼连续可调
重载商用车
模型预测控制
平顺性
vibration and wave
secondary road excitation
continuous damping control
heavy-duty commercial vehicles
model predictive control
ride performance
