基于前视地形的极限告警曲线算法研究  

Research on limit warning curve algorithm based onforward-looking terrain

作　　者：孙锴 闵彤 丰新龙 庞华群 李钰 SUN Kai;MIN Tong;FENG Xinlong;PANG Huaqun;LI Yu(AVIC Taiyuan Aero-Instruments Co.,Ltd.,Taiyuan 030006,China;School of Electronic Information,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]太原航空仪表有限公司,山西太原030006 [2]西北工业大学电子信息学院,陕西西安710072

出　　处：《飞行力学》2023年第5期52-57,64,共7页Flight Dynamics

基　　金：山西省关键核心技术和共性技术研发攻关专项资助(2020XXX018)。

摘　　要：针对作战飞机在低空中的可控飞行撞地问题,提出基于前视地形的极限告警曲线算法。该算法建立了飞机运动学模型、地形感知模型、飞行轨迹预测模型和极限告警曲线算法模型。首先,根据地形高程数据,以飞机拉起轨迹与地形的最小间距是否大于最小安全距离作为寻找极限告警点的判断条件,对上述模型进行仿真得到飞机的极限告警曲线。然后,综合考虑地形倾斜角和飞行员承受过载,对曲线进行优化,给出适宜飞行员拉起避障的最优告警曲线。最后,开展了仿真算例验证。研究结果表明,所提算法可依据飞机爬升性能和地形变化给出正确的极限告警曲线和最优告警曲线,当飞机前方有碰撞危险时可成功拉起避障。Considering the controlled flight into terrain mishaps of combat aircraft in low-altitude flights,a limit warning curve algorithm based on forward-looking terrain was proposed in this paper.The aircraft kinematic model,terrain awareness model,flight trajectory prediction model and limit warning curve model were established.Firstly,based on the terrain elevation data,the aircraft's limit warning curve was got by simulating the above models after taking whether the minimum dis-tance between the aircraft's pull-up trajectory and the terrain was greater than the minimum safe dis-tance as the judgment condition to find the limit warning point.Then,after the consideration of the terrain inclination angle and the overload on the pilot,the optimal warning curve suitable for pilots to pull-up to avoid terrain was given by optimizing the limit warning curve.Finally,simulation examples were conducted to verify the results.The research results show that the limit warning curve and opti-mal warning curve can be given correctly based on the aircraft climbing performance and terrain varia-tion,and the aircraft can successfully pull up to avoid terrain when it is in danger of collision ahead.

关 键 词：可控飞行撞地 前视地形告警 地形高程 极限告警 最优告警 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]