Numerical Simulation of Rolling Airframes Using a Multi-Level Cartesian Method

A supersonic rollin_ missile with two synchronous canard control surfaces is analyzed using an automated, imiscid, Cartesian method. Sequential-static and time-dependent dynamic simulations of the conplete motion are computed for canard dithe_ schedules for level flight, pitch, and yaw maneux ors. The dynamic simulations are compared di._ectly against both highresolution viscous sire flations and relevant experimental data, and are also utilized to compute dynamic stabilit? derivatives. The results show that both the b _dy roll rate and canard dither motion influenc:_ the roll-averaged forces and moments on the b _dy. At the relatively low roll rates analyzed in 1he current work these dynamic effects are mod,,st, however the dynamic computations are effect.ire in predicting the dynamic stability derival ires which can be significant for highly-maneu.'erable missiles.