The reconstruction of twist torque in the Main Parachute Risers of the Capsule Parachute Assembly System (CPAS) has been successfully used to validate CPAS Model Memo conservative twist torque equations. Reconstruction of basic, one degree of freedom drop tests was used to create a functional process for the evaluation of more complex, rigid body simulation. The roll, pitch, and yaw of the body, the fly-out angles of the parachutes, and the relative location of the parachutes to the body are inputs to the torque simulation. The data collected by the Inertial Measurement Unit (IMU) was used to calculate the true torque. The simulation then used photogrammetric and IMU data as inputs into the Model Memo equations. The results were then compared to the true torque results to validate the Model Memo equations. The Model Memo parameters were based off of steel risers and the parameters will need to be re-evaluated for different materials. Photogrammetric data was found to be more accurate than the inertial data in accounting for the relative rotation between payload and cluster. The Model Memo equations were generally a good match and when not matching were generally conservative.


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    Titel :

    Reconstruction of Twist Torque in Main Parachute Risers


    Beteiligte:
    Day, Joshua D. (Autor:in)

    Kongress:

    AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar ; 2015 ; Daytona Beach, FL, United States


    Erscheinungsdatum :

    2015-03-30


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    RECONSTRUCTION OF TWIST TORQUE IN MAIN PARACHUTE RISERS

    Day, Joshua D. | British Library Conference Proceedings | 2015


    Reconstruction of Twist Torque in Main Parachute Risers

    Day, Joshua / Ray, Eric | AIAA | 2015


    Apollo 15 main-parachute failure

    Arabian, D. D. / Mechelay, J. E. | NTRS | 1972


    STS-3 main parachute failure

    Runkle, R. / Henson, K. | NTRS | 1982


    Evaluation of Abrasive Contact between Forward Bay Cover Textile Parachute Risers and Thermal Tiles

    Hennings, Elsa J. / Petersen, Michael L. / Anderson, Brian P. et al. | AIAA | 2013