Dynamics Modeling and Simulation for the Near Space Airship with Pressure Resistance Mechanism

Abstract

The key problem of the near space airship is the maintenance of the safe pressure and the formed buoyancy of the capsule caused by helium “over hot / over cold” under the change of external thermal radiation environment during the circadian cycle station-keeping. In order to solve this problem, this paper takes a typical near-space airship with a pressure resistance mechanism as the research object. Firstly, ten-degree freedom describing its motion is determined under reasonable assumptions. Secondly, the multi-body dynamics model of the airship is established based on the second Lagrange equation. Finally, the model is numerically simulated in MATLAB / Simulink. The simulation results show that the multi-body dynamics model of the airship in this paper effectively reflects and simulates the motion characteristics of the near-space airship with a pressure regulating mechanism under the action of the environmental wind field, which provides a theoretical basis for further research of this kind of object.