The large-angle pendulous motion of the parachute system, which increases the touchdown impact loading to the structure and saturates the control system, is very disadvantageous to the security of the system. To determine the root cause of the pendulum motion and provide improved design to mitigate the risk, there is an urgent need for stability analysis of the parachute system. In this work, a novel data-driven approach is presented for the stability analysis of the parachute, which could not only determine the stability of system at the glide point but also extract the dynamic characteristics like frequency and amplitude when the system runs into the large amplitude coning or pitching motion. The data-driven method is shown to have a good agreement with the small-disturbance stability analysis of the classic five-degree-of-freedom parachute system. The dominant Koopman modes used to yield a finite linear representation of the nonlinear pendulum dynamics are extracted; these Koopman modes are shown to be the intrinsic components of the parachute system after a large amount of simulation data is analyzed. At last, a two-main multibody parachute system is included to demonstrate the ability of the data-driven method in stability and modal analysis of complex parachute system.
Stability Analysis of the Parachute System with a Data-Driven Approach
Journal of Guidance, Control, and Dynamics ; 46 , 1 ; 127-140
2022-11-08
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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