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Rotating parachutes are used, for example, to decelerate and spin the submunitions of defense weapons against armored ground vehicles. Usually, the desired system performance data, like velocity of descent, rate of spin, submunition inclination angle against vertical, and dynamic stability are so difficult to meet all at the same time that intensive design and redesign work is necessary until an optimal parachute-load configuration is found. To limit time-consuming field tests with expensive hardware, a 9-degree-of-freedom (DOF) computer program was developed for the simulation of the trajectory and the dynamic behavior of the parachute system. Now the influence of the important system parameters can be analysed in a simulation first. In this article the mathematical model of the parachute-load system is presented together with typical simulation results.
Doherr et al. (Tue,) studied this question.