Mathematical model of an astatic autopilot of a helicopter including couplings between longitudinal and lateral motions

A method of determining the laws of control for an astatic autopilot has been considered. These laws have been formulated on the basis of the linearized equations of spatial motion of a single-rotor helicopter. All couplings between longitudinal and lateral motions have been taken into account. The numerical example for one flying speed and the variations of the compensation and amplification coefficients for the whole range of flying speeds have been presented.