ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Brownout suppression optimization of helicopter landing trajectory parameters under real control
Received date: 2025-02-15
Revised date: 2025-05-06
Accepted date: 2025-05-19
Online published: 2025-05-19
Supported by
National Natural Science Foundation of China(120132012);Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
To analyze the influence of the descent parameters of the helicopter in the dust environment on the brownout in the real state， the Z-3 helicopter is taken as the research object. Firstly， the free wake method considering the influence of in ground effect is used to calculate the rotor aerodynamic force. The dynamic model of the helicopter is established by components， and the appropriate feature points are selected for trim and small disturbance linearization. Then， based on the trajectory tracking cascade control system and the model switching method， the control quantity and state quantity of the helicopter descent process are obtained. On this basis， the flow field of the descent process is discretized， and the sand field of the descent process is obtained by combining the sand field calculation method， and the visual influence of the sand field on the driver is obtained. Based on the above process， the Kriging surrogate model method is used to establish the mapping relationship model between the helicopter descent parameters and the brownout effect in the real descent state， and the genetic algorithm is used to optimize the descent parameters of the brownout suppression effect of this model. The results show that the proposed method can effectively simulate the control quantity and state quantity of the real helicopter flight process， and obtain the real flow field and brownout situation of the helicopter take-off and landing process. Near-ground tangential airflow tends to raise sand， but brownout effects must be assessed comprehensively based on the overall flow field. For the Z-3 helicopter， a faster vertical descent speed can reduce the amount of sand， but may cause greater sand uplift and retention. Descent profiles such as oblique descent or spatial curve are more effective in brownout suppression. After optimization， the sand concentration of vertical descent， oblique descent and two kinds of spatial curve descent is reduced by 13.41%， 17.52%， 16.45% and 3.44% respectively compared with the sand concentration of vertical benchmark descent.
Zhuangzhuang CUI , Binwu REN , Xu ZHOU , Zhe CHEN , Guoqing ZHAO . Brownout suppression optimization of helicopter landing trajectory parameters under real control[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(S1) : 732186 -732186 . DOI: 10.7527/S1000-6893.2025.32186
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