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针对汽车通过连续减速带时所产生振动,采用二自由度非线性悬架系统为研究对象,分析其混沌动力学行为,从而实现对系统混沌进行抑制。通过分析高速公路上特殊路段连续减速带的参数和设置方式,建立其静态激励模型和得出动态激励相关函数,以数值仿真研究了非线性汽车模型在此激励下的混沌振动,获得导致系统发生混沌振动的频率条件,及车速、减速带参数和混沌运动之间的关系。结果表明,在连续减速带路面的激励下,车辆有发生混沌运动的可能,可利用状态变量反馈进行混沌控制。
In view of the vibration generated when the vehicle passes through the continuous deceleration zone, the two-degree-of-freedom nonlinear suspension system is adopted as the research object, and its chaotic dynamic behavior is analyzed to suppress the system chaos. By analyzing the parameter and setting mode of the continuous deceleration zone on the special section of expressway, the static excitation model and the dynamic excitation correlation function are established. The chaotic vibration of the nonlinear vehicle model under this excitation is studied by numerical simulation. The chaotic vibration frequency condition, and the relationship between vehicle speed, deceleration zone parameters and chaos motion. The results show that under the excitation of continuous deceleration belt, the vehicle may have the possibility of chaos motion, and the chaos control can be achieved by using the state variable feedback.