摘要
建立了基于直升机舰面起降动态仿真的风限图(WOD)计算方法,综合计入舰船尾流、直升机运动和驾驶员操控等多因素的作用提升风限图计算的准确度。基于耦合舰船非定常尾流的飞行动力学模型,发展了适于直升机多轴协同操控的驾驶员模型,建立了舰面起降轨迹的数学描述和生成方法,形成计入舰船尾流、直升机运动和驾驶员操控等多因素综合作用的直升机舰面起降动态仿真方法。在此基础上,总结风限图计算判据,建立风限图计算方法。计算结果表明,某些风况下直升机在舰面起飞和降落过程中受到舰船尾流的干扰远大于在甲板上方悬停时受到的作用。本文方法能够捕捉到不同起降点和起降方式导致舰船尾流时空变化的干扰,与传统计算方法相比,显著提升了风限图计算的准确度。
This paper presents a Wind-Over-Deck（WOD）envelope calculation method by simulation of helicopter shipboard operations.Impacts of ship airwake,helicopter motions,and pilot controls are all taken into consideration to improve the accuracy of WOD envelope calculation.First,based on the flight dynamics model coupling with unsteady ship airwake,apilot model is developed for helicopter maneuvering requiring multi-axis controls.Then,the mathematical description and generation algorithms of the classical helicopter shipboard flight trajectories are proposed.Finally,a dynamic simulation method for helicopter shipboard operations is obtained considering the impacts of ship airwake,helicopter motions and pilot controls comprehensively.Based on the simulation results of helicopter shipboard operations,the rejection criteria for WOD envelope calculation are summarized,and a calculation method of WOD envelope is developed.The calculated results show that the impacts of the ship airwake along the shipboard launching and recovery trajectories on helicopter flight states and pilot controls are greater than those above the landing spots in some WOD conditions.The proposed method can capture the impacts of the temporal and spatial variations of ship airwake above different landing spots and along different flight trajectories.In comparison with the traditional WOD calculation method,the proposed method significantly can improve the accuracy of WOD calculation.
作者
吉洪蕾
赵辉
陈仁良
吴文韬
JI Honglei;ZHAO Hui;CHEN Renliang;WU Wentao(College of Aerospace Engineering,Chongqing University,Chongqing 400030,China;National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Systems Engineering Research Institute,Beijing 100094,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2018年第11期53-64,共12页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(11672128)
中央高校基本科研业务费专项资金(2018CDXYHK0016)~~
关键词
直升机
飞行动力学
舰船尾流
动态配合
风限图
helicopter
flight dynamics
ship airwake
dynamic interface
wind-over-deck envelope
