Application Study on the DDPG Method for Designing Variable Camber Airfoils/Wings Under Buffeting Constraints

ZHOU Sili; SUN Gang; WANG Cong

doi:10.21656/1000-0887.440204

Volume 45 Issue 1

Jan. 2024

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ZHOU Sili, SUN Gang, WANG Cong. Application Study on the DDPG Method for Designing Variable Camber Airfoils/Wings Under Buffeting Constraints[J]. Applied Mathematics and Mechanics, 2024, 45(1): 45-60. doi: 10.21656/1000-0887.440204

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Application Study on the DDPG Method for Designing Variable Camber Airfoils/Wings Under Buffeting Constraints

doi: 10.21656/1000-0887.440204

Department of Aeronautics & Astronautics, Fudan University, Shanghai 200433, P.R.China

Received Date: 2023-07-04
Rev Recd Date: 2023-09-27
Publish Date: 2024-01-01

Abstract

Abstract

The application of the variable camber technology has promising results in improving the lift-to-drag performance during the cruise phase, particularly under multi-lift conditions. This improvement is crucial for enhancing the economic benefits of the entire flight. A smooth and continuous flow separation function was developed to constrain the buffeting performance. An optimization model for cruise performances under multi-lift conditions of wing cross sections was constructed through combination of this function with the variable camber technology and an artificial neural network surrogate model. The deep deterministic policy gradient (DDPG) method was used to optimize this model, resulting in a cruise average lift-to-drag ratio improvement of 6.8% under buffeting constraints. This improvement surpasses the results obtained by other optimization algorithms, such as the particle swarm optimization (PSO) and the improved gray wolf optimization (GWO). The results of the generation and analysis of 2 conical swept wings with the unoptimized and optimized airfoils, show the contribution of the 2D variable camber airfoil optimization to 3D wings.
- aerodynamic optimization,
- DDPG,
- variable camber,
- buffet

(Contributed by SUN Gang, M. AMM Editorial Board)

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References(39)

References

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