飞机反区速度矢量不稳定及其控制的机理  

Mechanism of aircraft's velocity vector instability and its control in backside area

作　　者：汪节 吴文海 高丽 张杨 李鑫 WANG Jie;WU Wenhai;GAO Li;ZHANG Yang;LI Xin(Department of Aeronautical Electrical Control Engineering and Command,Qingdao Branch,Naval Aeronautical University,Qingdao 266041,China)

机构地区：[1]海军航空大学青岛校区航空仪电控制工程与指挥系,山东青岛266041

出　　处：《国防科技大学学报》2018年第5期123-132,共10页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(51505491)

摘　　要：在信号流图的基础上,提出多回路分析的方法,并用于研究反区时速度矢量不稳定及其稳定控制的机理。建立了纵向动力学的信号流图,并证明了一个回路的收敛性定理。在此基础上,通过理论分析得出了速度矢量不稳定在不同层面上的原因,也得出了速度和轨迹的发散度表达式等,并表明阻力-速度曲线、轨迹角-速度曲线、极曲线、阻力系数曲线等存在相互对应的反区和正区,并且阻力-速度曲线和轨迹角-速度曲线在斜率上成比例。研究得出进场动力补偿系统下速度矢量的稳定临界条件、收敛度、稳定机理等,理论分析和仿真比较了速度恒定进场动力补偿系统和迎角恒定进场动力补偿系统在控制性能上的差异。On the basis of signal flow graph,the method of loop analysis was put forward to study the mechanism of velocity vector instability and its stable control.The signal flow graph of the longitudinal dynamics was established,and the convergence theorem of loop was proved.On this basis,through theoretic analysis,the reasons of velocity vector instability at different levels were obtained,and the velocity and flight path′s instability expressions were obtained too.In addition,it was also shown that the drag-velocity curve,the track angle-velocity curve,the polar curve and the drag coefficient curve possess mutual backside area and frontside area,and the drag-velocity curve′s slope is proportional to the track angle-velocity curve′s.The conclusions about the velocity vector′s stability critical condition,convergence expressions and stability mechanism under APCS(approach power compensation system)were obtained,and the comparison results about control performance between velocity constant APCS and angle-of-attack constant APCS were obtained through theoretic analysis and simulation.

关 键 词：速度 轨迹角 着舰 反区 信号流图 回路分析 动力补偿 

分 类 号：V249[航空宇航科学与技术—飞行器设计]