Based on the three new supposition and the tow new mechanical tools : moment vector and radius vector , the warping theory introduced the analytical method of the rotation of a cross section around a fixed axis , so as to make the space stability of the thin - walled member complanate and one - dimensioned 翘曲理论以三条新的假定和新建立的弯矩矢量和转角向径两大力学工具为基础，提出了绕定轴转动的分析方法，使薄壁构件的空间变形平面化、一维化。
After analyzing the existing ambiguity resolution methods the dissertation investigates the baseline rotation method based on the antenna - swap idea , and develops the fixed axis rotation maximum - minimum method ? farmm and the equivalent rotation maximum - minimum method ? ermm applicable for static basement and moving vehicle respectively . the former lowers the demands on rotation device while the latter improves the flexibility of antennae installation . meanwhile the dissertation also brings forward an ambiguity function search method which needs only one single epoch data with the outer aided information , and investigates the accuracy requirements for the assistant pointing information 其次,通过与gps等多星系统定向关键技术的对比分析,指出双星定向模糊度确定的难度;在分析现有模糊度求解方法的基础之上,研究了基于交换天线思想的转动基线模糊度确定方法,并提出了适合于静基座的定轴转动极大/极小值farmm法,以及适合于地面运动载体的等效转动极大/极小值ermm法,前者降低了对转动机构的要求,后者则提高了天线安装的灵活性;同时,提出了一种借助外部辅助信息的模糊度函数搜索法实现单历元双星定向,并分析了对外部辅助单轴姿态信息的精度要求。
Introduced the second order analysis of the thin - walled members based on the theory of the rotation of a cross section around a fixed axis , and discussed the general methods of the loading capacity and the space stability coefficient for the thin - walled columns . used a programme , a large amount of space stability coefficient of t - shaped and l - shaped axes columns with a initial bend was computed to gain the curves of the columns . the procedure of the computation behaved the simplification and the convenience of the method 介绍了以定轴转动理论为基础的薄壁柱空间稳定二阶分析方法，初步论证了以此为基础的薄壁柱空间稳定承载力的验算及空间稳定系数的计算方法，并借助程序对具有初弯曲的各种“ t ”形和“ l ”形轴压柱的空间稳定系数进行了计算，作出其柱子曲线图，从而验证了此方法的可行性和简便性，同时提出以此为基础对钢结构截面优化的方法。
Imitating the shape of a piano , this sculpture is composed of two main parts the bamboo tubes and a stainless steel sheet . varying in length , the bamboo tubes collect various amount of rainwater and turn at the pivot at different time intervals . when the water comes out of the tube , it rotates back to its original position and hits the stainless steel sheet with a pounding sound 它外形彷似一台钢琴，由一组竹筒及一片不锈钢片组成，每根竹筒长度不一，储水量不同，因此会于不同时间依中轴转动，当水被排出后，竹筒立即反弹至原本位置，敲击钢片，发出清脆而庄严的声响。
The paper introduced the space stability theory based on the method of the rotation of a cross section around a fixed axis of the thin - walled member , and made some simply discursions . according to the theory , a programme was worked out to analyse [ - shaped , t - shaped and l - shaped axes columns . using the results of the programme , the paper has made the graph of the critical force changing by , and furthermore analysed the characteristic of the thin - walled members " space stability 本文对基于绕定轴转动理论的薄壁构件的空间稳定理论进行了介绍和简单的分析论证，并根据此理论编程对“ [ ”形、 “ t ”形和“ l ”形轴压构件进行了大量计算，作出其空间稳定临界力随长细比的变化曲线图，对其空间稳定特性作了一定的分析。
