Controlling flow structures by wing motion in a flapping-flight model

We have studied flow control in a two-dimensional flapping flight model for insects. The insect's center-of-mass motion can move in both horizontal and vertical directions according to the hydrodynamic force generated by flapping. Under steady flapping motion, the model converges to steady flight states depending on initial conditions. Further, we show that a short-time wing stop can control the final steady flight states. The model's flight finally converges to a final state by way of another quasi-steady state, which is not observed as a (stable) steady flight.