Aircraft stall phenomenon analysis using nonlinearity index theory

作者：Tapolcai Daniel P; Omran Ashraf^*; Newman Brett

来源：Aerospace Science and Technology, 2017, 68: 288-298.

DOI：10.1016/j.ast.2017.04.008

Stalling has been understood to be an important nonlinear process in the behavior of the motion of flight vehicles. Nonlinearity index theory is presented herein as a gauge to understand and measure the nonlinearity of aircraft under given operating conditions. Traditionally, linear theory has been relied upon for analysis of stalling and the phenomena related to it in order to correlate the significance of stall to flight behavior and overall general flight safety. However, for complex flight vehicles involving post-stall regimes, in some cases linear theory has been shown to be misleading in its given approaches. The nonlinearity index is given here as a means by which the overall linearity of the system can be evaluated, and is used to discern the accuracy and conclusions of the traditional methods of linear analysis. This theory is applied to a nonlinear pitch-plunge aircraft model and exposes behavior undetected by the traditional approach.

• 出版日期2017-9