细长翼摇滚的气动特性  

AERODYNAMIC CHARACTERISTICS OF SLENDER WING ROCK

作　　者：何龙德[1] 姜俊成[1] 

机构地区：[1]中国科学院力学研究所

出　　处：《气动实验与测量控制》1995年第2期84-89,共6页

摘　　要：对细长翼摇滚的一组典型的滚转角随时间变化的实验数据进行参数辨识，并用改进的单自由度数学模型，计算其非线性滚转阻尼特性后表明，当机翼摇滚由小振幅逐渐发展为大振幅的平衡状态时，其阻尼导数始于某一正值，且随振幅的增加而减小，最后便趋于零。而非线性阻尼力矩的变化幅值，则是正比于角振幅的变化率，其峰值便出现在振幅变化最陡的位置。This paper develops a modified mathematical model of one degree of freedom for wing rock .The nonlinear roll damping characteristics of wing rock are provided by means of parameter identification to a typical experimental data. When wing rock motion developed from small roll amplitudes to large amplitudes of the equilibrium state, the roll damping derivatives started from a positiye value reduce with roll amplitudes increasing and tend to zero. This ranges of oscillated nonlinear roll damping moment are in proportion to the rate of roll amplitudes variations.Thus the peak of the damping moment appears as variation of the roll amplitudes is maximum.

关 键 词：机翼摇滚 大振幅 滚转阻尼 动稳定性 气动特性 

分 类 号：V211.411[航空宇航科学与技术—航空宇航推进理论与工程]