@article{ZHANG2026, 
author = {Junlin ZHANG and Tielin MA and Jingcheng FU and Zhiyao LIU},
title = {Structural and dynamic analysis of airborne towed detection coil array system},
year = {2026},
journal = {Acta Aeronautica et Astronautica Sinica},
volume = {47},
number = {8},
keywords = {aerial towed system, multibody dynamics, structural design, dynamic characteristics, maneuvering flight},
url = {https://www.sciopen.com/article/10.7527/S1000-6893.2025.32673},
doi = {10.7527/S1000-6893.2025.32673},
abstract = {To address the challenges of nonlinear dynamics and attitude stability control in airborne towed detection coil array systems, this paper proposes a high-fidelity dynamic modeling and “steady-state design-dynamics” integrated analysis method. The method first employs the lumped mass method to discretize the cable system and combines six-Degree-of-Freedom (6-DOF) rigid body theory to model the detection coils, constructing a complete rigid-flexible coupled dynamic model. Furthermore, a steady-state flight configuration is designed based on static equilibrium theory. After validation through field flight tests, the unstretched lengths of all cables are back-calculated using the displacement method and a progressive analysis approach, thereby precisely resolving the difficulties in system design and determining simulation initial conditions for the complex model. Simulations under three typical severe disturbance conditions indicate that: under constant velocity increment, a gentler acceleration strategy with a lower peak and more dispersed duration more effectively suppresses attitude disturbances and tension impacts; a rear aerodynamic membrane enhances dynamic maneuvering stability, but subject to the coupling effects of membrane self-weight and environmental airflow disturbances, it faces constraints regarding static attitude offset and increased structural loads; the severity of lateral disturbances is primarily dominated by the perpendicular crosswind component; and in complex maneuvers such as turning, the geometric configuration of the tower structure endows the system with self-stability, although high-speed maneuvers still significantly increase lateral swing amplitude and structural loads.}
}