摘要
针对混合控制中簧上质量和簧下质量绝对速度检测精度难保证的问题,提出一种新的混合控制策略。首先建立磁流变阻尼器的动力学模型以及混合控制模型,并建立整车七自由度力学模型。考虑悬架弹簧和轮胎非线性运用能量法和拉格朗日方程建立系统非线性微分方程。然后基于连续减速带激励下分别对被动,优化前的混合控制半主动悬架以及优化后混合控制半主动悬架的簧上质量垂直、俯仰和侧倾加速度以及悬架动挠度进行仿真分析,结果表明优化后的混合控制半主动悬架在提高测量精度的同时能够有效的降低系统的振动。最后从非线性的角度对系统进行分析,发现在整个频域内系统产生了分岔、混沌等丰富的非线性振动。
In order to guarantee the detection accuracy of the absolute speed of the sprung mass and the unsprung mass in the hybrid control,a new hybrid control strategy was proposed.Firstly,we established a dynamical model and hybrid control model of magnetorheological damper and built a 7-DOF mechanical model of the whole vehicle.By considering the nonlinearity of suspension spring and tire,we used the energy method and Lagrange equation to establish the nonlinear differential equations.Based on the excitation of continuous speed bumps,respectively,we analyzed the vertical acceleration,pitch acceleration and roll acceleration of sprung mass of hybrid-control semi-active suspension before optimization and after optimization and the dynamic deflection of suspension.Following conclusion can be drawn from results.The optimized hybrid-control semi-active suspension can effectively reduce the vibration of system while improving the measurement accuracy.Finally,we analyzed the system from the nonlinear angle,and we can see that the system generates rich nonlinear vibrations such as forking and chaos in the whole frequency domain.
作者
班朋
朱由锋
王强
孔小飞
BAN Peng;ZHU You-feng;WANG Qiang;KONG Xiao-fei(College of Transportation,Shandong University of Science and Technology,Qingdao Shandong 266590,China;College of Mechatronic Engineering,Shandong University of Science and Technology,Qingdao Shandong 266590,China)
出处
《计算机仿真》
北大核心
2019年第9期147-151,167,共6页
Computer Simulation
基金
国家自然科学基金(51675315)
关键词
混合控制
半主动悬架
非线性振动
分岔
混沌
Hybrid control
Semi-active suspension
Nonlinear vibration
Forking
Chaos
