Parameter identification of disk-gap-band parachute during steady descent

Abstract

In light of the challenges associated with acquiring the display model for identifying parachute aerodynamic parameters, this study aims to establish a correlation model for the aerodynamic parameters of a specific type of disk-gap-band parachute during the steady drop stage of transonic and subsonic speeds. This will be achieved by employing the genetic algorithm and utilizing observed data from airdrop experiments. The findings indicate that the genetic algorithm can accurately calculate the aerodynamic parameters in dynamic simulation with a high level of precision. Additionally, the numerical distribution state of the parameters to be identified exhibits similarity in the multiple disk-gap-band parachute airdrop experiments, thereby confirming the accuracy of the model and methodology. Finally, the numerical ranges for the drag coefficient and the stable equilibrium angle of attack of this particular type of disk-gap-band parachute are provided. The results are compared with both the airdrop experiments and the wind tunnel experiment. The errors in question satisfy the criteria of engineering precision, and the verification process confirms the accuracy of the identification outcomes.