大直径弱刚性贮箱筒段内撑装配过程应力分析

为提升新一代运载火箭贮箱焊接过程装配精度,通过采用分布式光纤传感器,针对不同的内撑工况,对大直径弱刚性铝合金贮箱筒段的应力分布进行了测量分析,探讨了筒段撑出半径变化与筒段所受应力的关系,为实际装配工艺参数的选定提供理论支撑。

A NOVEL INDOOR GEO-LOCATION METHOD USING MIMO ARRAY

In a Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) based Wireless Local Area Network (WLAN) system, both Access Points (APs) and Mobile Termi-nals (MTs) are configured with multiple antennas, to make novel indoor geo-location method possible. In this paper, we presented a novel Least Square Support Vector Machine (LS-SVM) based data fusion algorithm to fuse signal strength measurements for indoor geo-location using only a single AP with MIMO arrays. We evaluate our proposed algorithms under indoor environments by MATLAB simulations. Simulation results show that our MIMO-based algorithm is superior to conventional least square algorithm.

贮箱筒段焊接装配内撑变形有限元分析

本文基于运载火箭贮箱筒段内撑工装撑出方式,通过有限元法,对筒段内撑变形进行数值模拟,研究筒段在内撑工装不同撑出量的作用下,其相应应力应变状态、径向变形,获得内撑工装撑出量与径向变形关系。