one embodiment of the present invention is a unique method of controlling the output of a synchronous electrical machine . another embodiment is a unique method of controlling the output of a synchronous electrical machine for powering a load . still another embodiment is a unique aircraft power generation system . other embodiments include apparatuses , systems , devices , hardware , methods , and combinations for fluid driven actuation systems . further embodiments , forms , features , aspects , benefits , and advantages of the present application will become apparent from the description and figures provided herewith .