EI、Scopus 收录
中文核心期刊

半车系统振动控制中的非线性能量汇设计与应用

DESIGN AND APPLICATION OF NONLINEAR ENERGY SINK IN VIBRATION CONTROL OF A HALF-VEHICLE SYSTEM

  • 摘要: 为提高乘车的舒适性,提出一种针对半车系统的新型悬架系统控制方案。该方案的核心是分布式布置非线性能量汇,即将多个非线性能量汇分别安装于前车身、后车身和前后车轮。基于牛顿第二定律建立了耦合非线性能量汇的半车系统的动力学方程。利用谐波平衡法求解系统的近似解析解,并使用四阶龙格库塔法验证了近似解析解的准确性。随后,为说明所提方案的有效性,比较了原半车系统、仅在车身前、后安装非线性能量汇和应用所提控制方案时系统的幅频响应。进一步,分析了所提控制方案中非线性能量汇质量、非线性弹簧刚度和阻尼对减振效果的影响。结果表明,在不改变附加非线性能量汇质量的条件下,所提方案通过分布式布置非线性能量汇实现了车身和车轮的振动控制,提升了乘车的舒适性和安全性。对于车轮,增大非线性能量汇质量有利于提高减振效率,而非线性刚度和阻尼的增大可能存在减振效率的恶化;对于车身,增大非线性能量汇质量或减小阻尼同样有利于提高减振效果,而非线性刚度的增大可能存在减振效率的恶化。所提方案为车辆悬架设计提供了有用的指导。

     

    Abstract: To enhance ride comfort, a novel suspension control scheme for a half-vehicle model is proposed. The core of this scheme involves the distributed arrangement of nonlinear energy sinks (NESs), with one NES individually attached to the front body, rear body, and front and rear wheels. The dynamic equations of the half-vehicle model coupled with NESs are established based on the Newton's second law. The approximate analytical solution of the system is obtained using the harmonic balance method, and the accuracy is verified using the fourth-order Runge-Kutta method. Subsequently, to demonstrate the effectiveness of the proposed scheme, the amplitude-frequency response of the original half-vehicle system, the system with NESs installed only on the front and rear bodies, and the system with the proposed control scheme are compared. Furthermore, the effects of NESs mass, nonlinear stiffness, and damping on vibration reduction performance are investigated. The results indicate that, without altering the additional mass of NESs, the proposed scheme achieves vibration control of both the body and wheels through the distributed arrangement of NESs, thereby improving vehicle comfort and safety. For the wheels, increasing the NESs mass is beneficial for enhancing vibration reduction efficiency, while increasing the nonlinear stiffness and damping may deteriorate vibration reduction efficiency. For the body, increasing the NESs mass or decreasing the damping is also beneficial for improving vibration reduction efficiency, while increasing the nonlinear stiffness may deteriorate vibration reduction efficiency. The proposed scheme provides valuable guidance for the design of vehicle suspension systems and also brings improvements in ride comfort as well as vehicle performance.

     

/

返回文章
返回