When the actuator reaches the desired position, the two signals (incoming and outgoing) cancel each other out and the actuator stops moving.Īutomatic Stability Systems: Fly-by-wire control systems allow aircraft computers to perform tasks without pilot input. Potentiometers in the actuator send a signal back to the computer reporting the position of the actuator. The computer receives the signals, which are then sent to the control surface actuator, resulting in surface motion. When a pilot moves the control column (also referred to as sidestick or joystick), a signal is sent to a computer through multiple wires or channels (a triplex is when there are three channels).
#Hydro mechanical flight control system manual#
This modifies the manual inputs of the pilot in accordance with control parameters.Ĭommand: Fly-by wire systems are quite complex however their operation can be explained in relatively simple terms. However, it is used in the general sense of computer- configured controls, where a computer system is interposed between the operator and the final control actuators or surfaces. The term fly-by-wire implies a purely electrically-signaled control system. Also, both have limited ability to compensate for changing aerodynamic conditions. Both systems often require redundant backups to deal with failures, which again increases weight. Mechanical and hydro-mechanical flight control systems are relatively heavy and require careful routing of flight control cables through the aircraft by systems of pulleys, cranks, tension cables, and hydraulic pipes. The fly-by-wire system also allows automatic signals sent by the aircraft’s computers to perform functions without the pilot’s input, as in systems that automatically help stabilize the aircraft.įigure 5.18: Flight control system: conventional and flight by wire.
#Hydro mechanical flight control system how to#
The movements of flight controls are converted to electronic signals transmitted by wires (hence the fly-by-wire term), and flight control computers determine how to move the actuators at each control surface to provide the adequate response. \( \newcommand\)įly-by-wire Wikipedia is a system that replaces the conventional manual flight controls of an aircraft with an electronic interface.
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