Servoactuators for Flight Simulator Motion Systems

Linear hydraulic servoactuators are used in flight simulator motion systems to provide platform motion cues. Accurate reproduction of commanded motion while simultaneously insuring aircrew safety requires a departure from conventional servoactuator design approaches. This paper will discuss the unique features found on servoactuators for flight simulator motion systems and their performance testing. These features include hydrostatic bearings, low friction seals, asymmetric servovalves, abort valves and hydraulic cushions.