|We have developed the elevator trim drive system for a business jet.
It consists of:
|The elevator trim drive system is a "fly-by-wire" design without any mechanical connections between the cockpit and the elevator. So special reliability requirements apply.
Kinematic LayoutThe central drive unit drives two (practically identical) actuators by flex shafts. The reliabiliy is guaranteed by key components (position sensors, slip clutches).
Drive UnitThe drive unit consits of the motors, the spur gears and the safety components.
Actuator with worm gear and trapezoidal thread spindleThe (practically identical) actuators have a high gear ration and are therefore self-locking (worm gear, trapezoidal thread spindles). There are also safety components to detect mechanical failures (e.g. rupture of the drive train).