Flight and engine controls for advanced development aircraft are required to be more ballistically tolerant, lighter, thermally resistant and EMI/EMP resistant than conventional controls. The two technologies identified as a prime paths to achieve these goals are composite materials and fiber optics - the composites will provide improved ballistic survivability, increased thermal resistance and reduced component weight; the fiber optics will provide lighter system weight and improved EMI/EMP resistance. As a portion of a major ongoing IR&D effort, Moog has developed a servoactuator that uses these technologies.
Materials and fiber optics development has produced a light weight, conventional temperature actuator. The control valve used in the demonstration hardware is Moog's small direct drive valve (DDV). We do have conventional electrohydraulic servovalves (EHSV) that are optically powered.