高灵敏度大量程六维力传感器设计

为满足空间在轨组装望远镜地面装配试验的相关需求,综合考虑六维力传感器的量程、刚度和灵敏度等因素,设计了一种高灵敏度大量程六维力传感器。首先对经典十字梁六维力传感器进行数学建模,通过对比各通道单独作用时,应变梁表面应变和弹性体变形刚度的数学表达式,提出一套提高传感器灵敏度的改进方案;然后对传感器结构进行详细设计,并通过传感器的有限元仿真验证结构方案可行性;最后,对六维力传感器进行加工与标定,得到传感器线重复性误差小于0.33%FS,力通道测量灵敏度大于0.83 mV/V,力矩通道测量灵敏度大于2.6 mV/V。该六维力传感器各项性能优良,目前已应用于在轨组装望远镜地面实验当中。

Research on Determination of Nitrogen Content in Petroleum Using Mid-infrared Spectroscopy

Nitrogen content is an important parameter for petroleum refining processes. The combined use of mid-infrared attenuated total reflection spectroscopy and multivariate calibration allows accurate determination of nitrogen content in petroleum and its products. The calibration models of nitrogen content in crude oils have been established by partial least squares (PLS) method. The results predicted by this method were very close to those determined by standard methods. Compared with standard methods, this method is provided with advantages such as high-speed, simplicity and good-repeat- ability without any needs for pretreatment.