Variable load factor guidance for low-attitude fly-to-point maneuvers of a jet fighter aircraft

作     者：Dabney, JB Miele, A 

作者机构：Rice Univ Dept Mech Engn & Mat Sci Houston TX 77251 USA 

出 版 物：《DYNAMICS AND CONTROL》 (Dyn Control)

年 卷 期：2000年第10卷第2期

页      面：195-212页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 0802[工学-机械工程] 0811[工学-控制科学与工程] 

主　　题：optimal trajectories minimum time trajectories quasi-level trajectories fly-to-point maneuvers guidance variable load factor guidance supermaneuvering jet fighter aircraft next-generation fighter aircraft 

摘      要：This paper describes the formulation and numerical investigation of a variable load factor guidance algorithm (variable n-guidance) that allows an aircraft pilot to approximate minimum-time low-altitude quasi-level fly-to-point maneuvers of a jet fighter aircraft. The maneuvers studied consist of flight to a point at a radial distance of 50 kft from the starting point, with the final position vector oriented at 45, 90, 135, 180 deg from the initial course and with the requirement that the initial and final altitudes be the same. First, the fly-to-point maneuver is optimized from the time viewpoint with respect to three controls (angle of attack, power setting, angle of bank) via the sequential gradient-restoration algorithm. Then, from the study of the optimal trajectories, a variable n-guidance algorithm is developed, connecting the load factor to the turn-to-go. This algorithm is implemented via feedback control and tested. For comparison purposes, a constant n-guidance scheme is also tested. The main conclusion is that the variable n-guidance algorithm produces trajectories that approximate closely the optimal trajectories. On the other hand, the constant n-guidance scheme does not approximate well the optimal trajectories.