摘要
飞行器的栖落机动被认为是解决舰载固定翼飞机超短距精确着舰的一种可行方式,已有研究主要集中于栖落过程大迎角气动力建模、标称栖落轨迹优化与轨迹跟踪控制,而鲜有对栖落着舰任务的总体分析。基于飞行器纵向栖落机动动力学模型,引入栖落轨迹可达域的概念,并给出可达域的数学描述;在此基础上,对可达域求解采用计算速度和精度兼具的高斯伪谱法,将可达域问题拆分为三个轨迹优化问题依次求解,首先求解栖落轨迹终端高度上边界,然后求解终端高度一定时的最近轨迹,最后求解终端高度一定时的最远轨迹,并给出相应的轨迹优化数学模型。结果表明:运用该模型及求解方法能快速得到计算结果,无动力飞行器的纵向栖落轨迹可达域为上窄下宽的不对称区域,且左右边界曲线线性度较好。
The landing maneuver of aircraft is considered to be a feasible way to solve the problem of ultra short dis⁃tance,precise landing of carrier based fixed wing aircraft.The existing researches mainly focus on aerodynamic modeling,nominal landing trajectory optimization and trajectory tracking control in the process of landing,but few on the overall analysis of the landing mission.Based on the dynamic model of aircraft longitudinal landing maneu⁃ver,the concept of landing trajectory reachable region is introduced,and the mathematical description of reachable region is given;On this basis,the Gauss pseudo-spectral method with both computational speed and accuracy is used to solve the reachable region problem,which is divided into three trajectory optimization problems.Firstly,the upper boundary of the terminal height of the perching trajectory is solved.Secondly,the nearest trajectory is solved when the terminal height is fixed.Finally,the farthest trajectory is solved when the terminal height is fixed.The simulation results show that:the model and solution method can quickly get the calculation results,the verti⁃cal landing trajectory of unpowered aircraft can reach the asymmetric region of narrow upper and wide lower,and the left and right boundary curves have good linearity.
作者
杜昕
黄江涛
章胜
DU Xin;HUANG Jiangtao;ZHANG Sheng(Aerospace Technology Research Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)
出处
《航空工程进展》
CSCD
2021年第6期79-85,共7页
Advances in Aeronautical Science and Engineering
基金
国家自然科学基金(11902332)。
关键词
栖落轨迹
可达域
大迎角
轨迹优化
高斯伪谱法
perching trajectory
reachable set
high angle of attack
trajectory optimization
Gauss pseudo-spec⁃tral method
