<p>A fluid–structure interaction simulation of the airship is conducted in ANSYS Workbench to obtain high-precision mesh deformation data for the flexible airship. Deformation data at several discrete nodes are extracted from the finite element model to construct a simplified structural deformation data matrix. Based on this data, the frequency-domain complex modal fitting method is employed to estimate modal parameters. The dominant natural frequencies are identified using the stochastic subspace identification method, and the corresponding mode shape matrix of the structural deformation is obtained. The internal and external elastic forces, together with the elastic deformation model, are formulated to establish the fluid–structure coupled dynamic equations of the flexible airship. A multi-vector thrust configuration and allocation scheme is designed, and a multi-channel decoupled PD controller is developed. The proposed controller enables accurate trajectory tracking while suppressing global elastic deformation oscillations and effectively reducing the deformation amplitude at the thrust application points.</p>