AIRCRAFT SEMI-AUTOMATIC LONGITUDINAL CONTROL SYSTEM Russian patent published in 2008 - IPC B64C13/00 

FIELD: aircraft control systems and equipment.

SUBSTANCE: proposed system includes unit for forming preset pitch angle, pitch selector, aircraft motion parameter sensors, preset pitch stabilization unit and unit for supply of discrete gates for elevator trimming drive. Preset pitch forming unit includes magnitude change unit and initial condition gate determination unit; used as pitch selector is trimming joy-stick. Signal showing position of trimming joy-stick on control wheel is just input signal of magnitude change unit which may increase or decrease magnitude of preset pitch depending on sign of this signal and equate magnitude of preset pitch at its output to magnitude of present pitch of aircraft at nonzero magnitude at reset switch input. Reset switch is included into magnitude change unit and is connected with output of initial condition gate determination unit which may receive signals showing position of automated control switch and from trimming joy-stick and form nonzero magnitude to input of said switch at the first moment of change-over of trimming joy-stick from neutral position as well as at OFF-position of automated control switch. Sensor of this system may change magnitudes of stabilized parameters on base of control skill and practically at the same rate as at manual control.

EFFECT: enhanced safety of landing.

3 dwg