Theoretical Analysis of the Effect of Several Auxiliary Damping Devices on the Lateral Stability and Controllability of a High-Speed Aircraft.

摘要

A theoretical analysis has been made of the effect of several auxiliary damping devices on the lateral stability and controllability of a high-speed aircraft. The systems investigated included stabilization devices which deflect the rudder or an auxiliary surface proportional to the yawing velocity, rolling velocity, or rolling acceleration and one which deflects both aileron and rudder proportional to the rolling velocity. An idealized control system without phase lag was assumed for the analysis. The present investigation indicated that each of the assumed stabilization systems is capable of improving the damping of the lateral oscillations of the assumed aircraft. The system which deflected the rudder proportional to yawing velocity made necessary increased pedal forces in steady turns, and the systems which deflected the rudder or rudder and ailerons proportional to rolling velocity required unnatural rudder deflections to maintain zero side slip subsequent to an applied rolling moment. The system which deflected the rudder proportional to rolling acceleration introduced adverse yaw subsequent to applied yawing or rolling moments.