国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

Aiming at the measurement problem of micro-trust on the satellite and spacecraft, a steady-state micro-trust measurement system with mN-level was designed. The measurement principle of torsion pendulum was applied on the structure of thrust stand. By the non-contact laser-displacement sensor, the drift angle of torsion arm was measured, which was combined with the adjustable electromagnetic balance force to carry out the dynamic closed-loop control. The controller and collector of NI company was used to the micro-thrust measurement system. The PID control algorithm and application software of measurement and calibration was developed on the LabVIEW platform to realize the mN-level micro-thrust measurement. The experiment was designed to verify the system calibration performance by the upload and unload process of 3 times with a series of precise weights. The results demonstrate that the micro-thrust measurement system is satisfied with the measurement range of 10~200mN. In this analysis, the calibration curve obtained by the least squares fit exhibits a good linearity and repeatability, and the data of upload is consistent with the data of unload. The accuracy of measurement is 0.31%, which is satisfied with the requirement of mN-level micro-thrust measurement and ensures the stability and reliability of measurement.