Abstract: Because of the nonlinear elastic characteristic of membrane spring, it is difficult to achieve high precision in control of automatic clutch of automobile. Since the characteristic of nonlinear input is known, a nonlinear compensator is designed based on generalized energy principle and inverse function theorem Furthermore, the asymptotic stability of the close-loop control is proved in theory. The compensator is applied to track expectational output angular velocity for automatic membrane clutch. The results show that the nonlinear controller is of asymptotic stability, more rover, its track performance much better than of linear controller.

Key words: Automatic clutch, Generalized energy principle, Input nonlinear, Membrane spring