时滞非线性主动悬架系统的减振控制研究  

Vibration control of nonlinear active suspension system with time delay

作　　者：邵素娟 任传波[2] 荆栋[2] Shao Sujuan;Ren Chuanbo;Jing Dong(School of Mechanical Engineering,Shandong University of Technology,255000,Zibo,China;School of Transportation and Vehicle Engineering,Shandong University of Technology,255000,Zibo,China)

机构地区：[1]山东理工大学机械工程学院,淄博255000 [2]山东理工大学交通与车辆工程学院,淄博255000

出　　处：《应用力学学报》2021年第3期1218-1225,共8页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51275280)。

摘　　要：将时滞状态反馈控制应用到非线性悬架系统中,实现对悬架系统的主动控制以达到减振的目的;建立了1/4车辆非线性主动悬架系统的力学模型,其中弹性力和阻尼力均含非线性项;运用多尺度法对量纲归一化数学模型进行解析计算,推出一种研究非线性时滞系统稳定性的方法;研究了时滞状态反馈控制参数对主动悬架系统减振效果的影响,综合考虑车身振幅和节能性得出最优反馈参数;最后通过数值模拟验证了理论结果的正确性。结果表明:通过仿真分析验证了稳定性分析方法的正确性;可以通过调节反馈时滞和增益系数控制时滞非线性主动悬架系统的振动;当反馈参数取最优解时,主动悬架系统的车身振动和轮胎振动与被动悬架相比分别减少了约98.24%和23.58%,有效地提高了悬架系统的减振效果。The time-delay state feedback control is applied to the nonlinear suspension system to realize the active control of the suspension system to achieve the purpose of vibration reduction.The mechanical model of 1/4 vehicle nonlinear active suspension system is established,both the elastic force and the damping force contain nonlinear terms.Multiscale method is used to analyze dimensionless mathematical model,and a method for studying the stability of nonlinear systems with time delays is presented.The influences of time-delay feedback control parameters on vibration reduction of active suspension system are studied.The optimal feedback parameters are obtained by taking the amplitude and energy saving of the vehicle body into consideration.Finally,the theoretical results are verified by numerical simulation.The results show that the correctness of stability analysis is verified by simulation analysis;the vibration of the time-delay nonlinear active suspension system can be controlled by adjusting time delay and gain coefficient;when the feedback parameters are optimized,the vehicle body vibration and tire vibration are reduced by 98.24%and 23.58%respectively,which greatly improves the vibration reduction effects of the suspension system.

关 键 词：主动悬架 非线性 时滞 减振 多尺度法 

分 类 号：O322[理学—一般力学与力学基础]