SERVO ACTUATORS – PRINCIPLE OF OPERATION
The following schemes explain the normal and the emergency operation that
can occur into any one of the two MR servo actuators cylinders.
NORMAL OPERATION
• the input lever transmits the pilot's input through a linkage and lay shaft
to the flow distributor assembly in each half of the actuator
• displacement of the input lever results in movement of the servo valves
from the neutral position routing the high pressure hydraulic fluid into
the appropriate cylinder chamber
• the resulting piston motion drags a dual load path feedback link to
rotate the input lever and reset the valve command
• movement of the input lever results in the piston moving in the opposite
direction