航空学报2025，Vol.46Issue(z1)：73-86,14.DOI:10.7527/S1000-6893.2025.32186
真实操纵下直升机降落轨迹参数沙盲抑制优化
Brownout suppression optimization of helicopter landing trajectory parameters under real control
摘要
Abstract
To analyze the influence of the descent parameters of the helicopter in the dust environment on the brown-out 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 lineariza-tion.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 param-eters and the brownout effect in the real descent state,and the genetic algorithm is used to optimize the descent pa-rameters 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 pro-files 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.关键词
自由尾迹/地面效应/动力学模型/沙盲/轨迹跟踪/代理模型/参数优化Key words
free wake method/in ground effect/dynamic model/brownout/trajectory tracking/surrogate model/parameter optimization分类
航空航天引用本文复制引用
CUI Zhuangzhuang,REN Binwu,ZHOU Xu,CHEN Zhe,ZHAO Guoqing..真实操纵下直升机降落轨迹参数沙盲抑制优化[J].航空学报,2025,46(z1):73-86,14.基金项目
国家自然科学基金(120132012) （120132012）
江苏高校优势学科建设工程(PAPD) National Natural Science Foundation of China(120132012) （PAPD）
Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions （）
