The theoretical modeling

free-falling body and visual simulation methods were adopted to research the dynamic characteristics of the terminal-sensitive submunition with a vortex-ring parachute at steady-state scanning stage. According to the first Lagrange equation

the five-body dynamical model including the body

parachute

umbrella tray

friction disc and connecting rod was established. The ballistics calculation and visualization were implemented by combining ADAMS

MATALB and VR methods. The moving images

falling velocity and rotational speed were obtained by launching the test submunitions on a hot air balloon. A comparative study concluded that the vortex-ring parachute had the advantage of motion stability and could keep the terminal-sensitive submumition spinning at a constant speed in the process of free falling. The falling velocity in stability was 13.5 m/s

and the rotational speed was about 3 r/s. The steady-state scanning angle was close to the static hanging angle of the body. The simulation results were in good agreement with the flight test.