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Acta Aeronautica et Astronautica Sinica ›› 2025, Vol. 46 ›› Issue (1): 630471.doi: 10.7527/S1000-6893.2024.30471

• Special Topic: Flexible Aerodynamic Deceleration Technologies • Previous Articles     Next Articles

Optimization shape design of capsule-supersonic parachute system based on fusion surrogate strategy

Lulu JIANG1,2,3, Xin PAN1,2,3, Wei JIANG4, Rui FENG4, Gang CHEN1,2,3()   

  1. 1.School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China
    2.State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an 710049,China
    3.Shannxi Key Laboratory for Environment and Control of Flight Vehicle,Xi’an 710049,China
    4.Beijing Institute of Space Mechanics and Electricity,Beijing 100094,China
  • Received:2024-04-02 Revised:2024-06-06 Accepted:2024-06-27 Online:2025-01-15 Published:2024-07-22
  • Contact: Gang CHEN E-mail:aachengang@xjtu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(92371201);Natural Science Foundation of Shaanxi Province(2022JC-03)

Abstract:

Supersonic parachutes, as crucial aerodynamic deceleration systems providing drag and stability, directly impact the success of lander missions. The structural parameters of parachutes that meet different aerodynamic performance requirements are often contradictory. To address the issues of structural parameter conflicts in the shape design of Mars parachutes, as well as the errors of lengthy design cycles and high calculation, this study proposes a fusion surrogate optimization strategy for the two-body model of the canopy-capsule system. The fusion surrogate model integrates the advantages of interpolation-based and regression-based surrogate models, and achieves higher prediction accuracy of aerodynamic coefficients under the same sample conditions. By employing the fusion surrogate model to replace the time-consuming Computational Fluid Dynamics (CFD) calculation process, the design cycle can be shortened, and design efficiency can be improved. The two-body model of the capsule- DGB parachute is optimized using a multi-objective genetic algorithm. The results show that the fusion surrogate optimization strategy can balance the drag and stability performance of the canopy, and enhance the overall deceleration capability of the disk-gap-band parachute under structural parameters and aerodynamic constraints, demonstrating good practicality and feasibility. The research findings can provide theoretical reference and technical reserves for the design and development of a new generation of supersonic parachutes for future Mars exploration missions.

Key words: fusion strategy, Mars parachute, optimization design, surrogate model, supersonic

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