为分析绳索长度制造误差对索网天线网面精度的影响，提出了一种整体坐标迭代算法． 该算法模拟了索网结构的自由节点在考虑绳索随机长度误差后向其他平衡状态运动的过程． 分别使用该算法和有限元法分析了一个环形桁架天线计算模型，并将这两种算法的计算结果做了对比，验证了该算法的正确性、可行性和有效性． 使用整体坐标迭代法分析了不同的误差分布、绳索长度公差和绳索预张力对网面精度的影响，并对网面综合误差与绳索长度误差、绳索预张力的关系进行了拟合分析，得到了满足工程需求的拟合关系式．

In order to describe how the manufacturing error of the cable length influences the surface accuracy ofcable antennas,a whole coordinate iteration algorithm by the name of WCIA is proposed.The proposed WCIA simulatesthe process,in which all the free nodes of the cable-net structure with the random error of the cable length movetowards other equilibrium states.Then,a calculation model of the hoop truss cable net antenna is analyzed by usingWCIA and the finite element method separately,and the analytical results obtained through the two methods are compared.Thus,WCIA is proved to be accurate,valid and feasible.Finally,WCIA is employed to analyze the influencesof the error distribution,the cable length tolerance and the cable pretension on the surface accuracy,and to performthe fitting of the relationships between the synthetic errors of the surface and the cable length error as well as thecable pretension,thus obtaining the fitting formulas which can meet the engineering requirements.