In this paper, we propose an archetypal two DOF self-excited system driven by moving belt friction, based upon the SD oscillator mounted on a moving belt. The moving belt friction is modeled as the Coulomb friction to formulate the mathematical model of the proposed two DOF self-excited SD oscillator. The stability of equilibria of the self-excited system are obtained to show the complex equilibrium bifurcations. A three-dimensional Poincaré map is constructed which characterize the dynamics of the system. Phase portraits are depicted to present the stick-slip periodic motion, stick-slip chaotic motion, and other friction-induced vibration phenomena.
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