干式双离合器低速起步时非线性动力学研究

Nonlinear Dynamic Study on Dry Double Clutch at Low Speed Starting

干式双离合自动变速器是目前汽车市场中比较先进的自动变速器之一。文章建立低速起步时干式双离合器的动力学模型,研究系统随着激励变化表现出复杂的非线性动力学行为,通过大量仿真得出:随着发动机转速激励的增大,干式双离合系统先是出现混沌之后过渡到多倍周期分岔后再过渡到极限环的演变过程,为解决干式双离合汽车在起步过程中出现的颤振问题提供一定的理论依据。

Dry DCT( dry double clutch transmission) is more advanced in the automotive market. By establishing dynamic model of dry dual-clutch at low speed starting,the nonlinear dynamic behavior of DDCT was studied with engine speed excitation. With the increase of engine speed,it shows as follows,dry dual-clutch system change from chaos to multiple bifurcation,then evolution of the limit cycle. It also provided a theoretical basis for solving the problem of process flutter of Dry DCT in the starting process.