Positioning device and method for porous grid electrode of microminiature ion thruster

The invention provides a device and a method for positioning a porous grid of a microminiature ion thruster, the device comprises an acceleration grid, an inter-grid insulating part, a screen grid and a base provided with three positioning parts, and the acceleration grid, the inter-grid insulating part and the screen grid are all provided with positioning grooves matched with the three positioning parts. According to the positioning device and method, the requirement for the machining precision of the positioning groove and the positioning structure is low, the positioning structure is detachable, the inert mass is reduced, non-interference fit is adopted, and the assembling and disassembling difficulty is reduced while the structural working strength is guaranteed. 本发明提出一种微小型离子推力器多孔栅极的定位装置及方法，该装置包括加速栅、栅间绝缘件、屏栅，还包括设有三个定位件的基座，所述加速栅、栅间绝缘件、屏栅上均设有与三个定位件匹配的定位槽。本发明的定位装置及方法对于定位槽和定位结构的加工精度要求低，定位结构可拆卸，降低惰性质量，采用非过盈配合，保证结构工作强度的同时降低了装配、拆卸难度。