Abstract: The experimental circuit of Coullet chaotic system is structured. As the parameter of Coullet system is changing, the bifurcate process form the steady periodic state to chaotic state is observed by using oscillograph. The system is effectively controlled via nonlinearly feedback. As the value of feedback gain is changing, the system can form chaotic state to the steady periodic state.

Key words: nonlinearly feedback control, chaos, Coullet chaotic system