Electromechanical transducer for automatic pilot - uses dual parallel controls comprising permanent magnet DC motor driving pinion and screw to give linear motion control

摘要

In response to an error voltage derived from the feedback control system and applied to the input of two high gain differential amplifiers, two permanent magnet DC electric motors on a common shaft drive a pinion and screw to produce transverse motion in a second shaft which actuates the aircraft controls. Connected to the transverse shaft are the sliders of two potentiometers which have their ends connected to a positive and a negative supply. The sliders are connected to the other input of the amplifiers which have the error voltage connected to them. If the loop gam of each amplifier is very large, the amplifier can be saturated by a weak signal, which corresponds to an equally small displacement.