Dynamics and modeling of rocket towed net system

Abstract

In order to study the complex dynamical behavior of the rocket towed net system, a three-dimensional model consisting of a rigid rocket model and a lumped mass net model is built based on the aerodynamics theory. The rocket towed net system model is solved by the fourth-order Runge–Kutta method in simulation. Simulation and experimental results show that the accuracies of rocket towed net system expanding distance were about 90% of the system length. With the comparison of simulation, a rigid multibody model and experimental results in rocket mass center trajectory, velocity, and pitch angle, the dynamical characteristics of rocket towed net system have been basically studied. It illustrates that the lumped mass model simulates the real rocket towed net system flying test better than the rigid multibody model. It also shows that the dynamical parameters of rocket towed net system flight have an impact on the system in the whole flying process. Constitutive model of flexible net mesh-belts can be considered in the future research studies.