Abstract
Subsonic static and oscillatory aerodynamic coefficients were measured at Politecnico di Torino for a planetary entry capsule model. The experimental data set was included in a mathematical model of payload-decelerator system, and the results of simulations were compared with flight-test data. The frequency-domain attitude response of the capsule was reproduced during the main parachutes' deployment, and discrepancies for the drogue opening phase were observed. The impact on simulations of atmospheric turbulence and asymmetries in the parachute suspension system was also considered. The results suggest that several factors may affect the fidelity of simulations such as correct modeling of suspension system geometry and flexibility, parachute aerodynamics, accuracy of payload inertial data, and accurate matching of real flight external perturbations. The effect of some design parameters on capsule attitude dynamics was evaluated. The artificial increase of capsule damping coefficients produced observable effects on attitude time histories for large perturbations of the aerodynamic derivatives only. The dynamic stability of the system is reduced for large increase of riser length and parachute added mass
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
