2results about How to "Reduce eccentricity error" patented technology

This invention discloses a micro-thrust measurement device and method. The micro-thrust measurement device includes a working base plate, a pivot and fixing module, a three-axis displacement stage, a torsion beam, a linear guide rail, a displacement sensor, a micro-thrust generator, and a counterweight. The linear guide rail is mounted on the working base plate and consists of a long guide rail and a short guide rail. The torsion beam is positioned between the long and short guide rails. Slider blocks are installed at the ends of both the long and short guide rails furthest from the torsion beam. The slider of the long guide rail houses a micro-thrust motor for measuring the micro-thrust, while the slider of the short guide rail houses a counterweight. The displacement sensor and the micro-thrust generator are respectively located on both sides of the long guide rail. The three-axis displacement stage is mounted on the torsion beam via the pivot and fixing module. This invention enables sub-millinewton-level micro-thrust testing of micro- and nano-satellite micro-propulsion systems. It is easy to operate, improves measurement accuracy, increases the measurement range of the testing system, and reduces costs.

The utility model discloses a kind of OTA performance test high-low temperature rotary table devices of phase center self-stabilization, including rotating base mechanism, rotary table support, pitch adjustment mechanism, translation adjustment mechanism, wave-through heat preservation cover and temperature control equipment, through the accurate adjustment of translation adjustment mechanism, drive measured piece translation before and after, make the physical center of measured piece and the rotating shaft of rotating base mechanism concentric;Since the rotating shaft of rotating base mechanism and the darkroom quiet zone center accurate alignment, and the center mark line of wave-through heat preservation cover and the quiet zone center alignment, finally realize the rotation center of measured piece and phase center coincide, effectively avoid the test error caused by eccentric, by temperature control equipment generates high-low temperature gas, realize temperature isolation of temperature control area and normal temperature area, satisfy the full temperature zone OTA performance test demand of measured piece.