Wing rock as a lateral-directional aircraft limit cycle oscillations induced by nonlinear aerodynamics occurring at high angle of attack
Young, Paul David
MetadataShow full item record
Wing rock at high angle of attack is an oscillatory lateral-directional motion phenomenon known to exist in some of today's high performance tactical aircraft. The motion has been consistently characterized as a lightly damped Dutch-Roll oscillation attributable to asymmetric wing stall. However, evidence gathered from wind tunnel simulations and at least one British study indicate that aerodynamic nonlinearit ies may be the source of wing rock. Regardless of the actual cause of the phenomenon, a study of wing rock has positive ramifications with respect to gaining a clearer understanding of the aerodynamics associated with high angle of attack flight. This report presents the results of an investigation of wing rock which centered on the premise that two distinct nonlinear aerodynamic mechanisms (aerodynamic hysteresis and a cubic nonlinearity in yawing moment) not only can cause wing rock but may drive it to a limit cycle oscillation as well.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Lin, Kyle Y.; Atkinson, Michael; Glazebrook, Kevin D. (2013-08-12);This paper considers a patrol problem, where a patroller traverses a graph through edges to detect potential attacks at nodes. Attackers arrive at each node according to independent Poisson processes and take a random ...
Tippet, Douglas F. (Monterey, California. Naval Postgraduate School, 2009-12);To deter terrorism, U.S. deterrence strategy must threaten retaliatory responses that are appropriate to the actions by non-state actors the United States wishes to prevent. The effectiveness of those threats depends on ...
Evaluation of a multi-agent system for simulation and analysis of distributed denial-of-service attacks Saw, Tee Huu. (Monterey, California. Naval Postgraduate School, 2003-12);DDoS attack is evolving at a rapid and alarming rate; an effective solution must be formulated using an adaptive approach. Most of the simulations are performed at the attack phase of the DDoS attack; thus the defense ...