电传飞机极限环振荡问题及解决措施研究

Research on Problem and Solution of Limit Cycle Oscillation on Fly-by-wire(FBW)Aircraft

针对现代高性能电传飞机飞行中出现的极限环振荡问题,从系统闭环回路中的气动特性、机械传动非线性、飞控软/硬件非线性、系统阻尼特性等方面对极限环振荡产生的原因和机理进行了分析研究,并针对性地提出了解决措施。以某型电传飞机特定状态纵向极限环振荡问题为例进行了分析研究,为飞机型号设计和使用维护等提供参考。

Aiming at the limit cycle oscillation problem during flight of modern high-performance FBW aircraft,this paper analyses and studies cause and mechanism of the limit cycle oscillation in various aspects such as the aerodynamic characteristics in closed loop of system,mechanical drive nonlinearity,flight control software/hardware nonlinearity and system damping characteristics,and proposes solutions accordingly.Taking the limit cycle oscillation problem in the longitudinal direction on a certain type of FBW aircraft at certain status as an example,the paper carries out analysis and research and provides references for aircraft type design,operation and maintenance.