Abstract: A chaotic movement system of spring oscillator driven along elliptical orbit is set up. It is based on forced oscillation and coincided with the condition of chaos. Major semi-axis and minor semi-axis of elliptical orbit are a =20 mm, b= 16 mm. Driving motor worked on a mode of frequency modulation which controlled by singlechip microcomputer. The range of angular velocity co is 20- 80 r/min. The displacement of oscillator is detected by DisLab system. The experiment result is in agreement with theoretical simulation well.

Key words: forced oscillation, chaos, driven along elliptical orbit