Two-stage jet nozzles series super-magnetostrictive jet servo valve and operating method thereof

The invention relates to a two-stage jet nozzles series super-magnetostrictive jet servo valve and an operating method thereof, which belong to the field of a hydraulic servo control technique. The two-stage jet nozzles series super-magnetostrictive jet servo valve provided by the invention comprises an upper end cover (4), a lower end cover (26), a super-magnetostrictive rod (14), an output rod (21), a coil skeleton (8), a polarization magnetic filed generating unit and a driving magnetic field generating unit, wherein the upper end cover (26) is provided with a left valve core installation cavity (45) and a right valve core installation cavity (46) which are symmetrical relative to the axis of the output rod; a group of valve core components are respectively installed in the left valve core installation cavity (45) and the right valve core installation cavity (46); and wedge-shaped amplification mechanisms are formed in the contact positions of the output rod (21) and the left and the right valve core installation cavities. The two-stage jet nozzles series super-magnetostrictive jet servo valve provided by the invention has the advantages of great pressure gain and rapid response, and the driving part has the obvious characteristics of small heat radiation, adjustable polarization magnetic filed, intelligentized effect and the like.