伪权现象及抗差估计

False Weight Phenomenon and Robust Estimation

讨论了权与平差结果的关系，指出了残差向量与权之间不一定存在一一对应的关系，对现行常用抗差估计方案用实例进行了研究，并建议抗差方案设计应对权函数的取值加以限制，以保证平差系统的稳健性。

In this paper, the relation between the weights of observations and the adjustment results is discussed. It is found that the one-to-one correspondence does not exist between correction vector and weight matrix. On the basis of studies of several robust estimation schemes in common use by an example, the conclusion is gotten that the weight function value must be limited in order to ensure the robustness and stability of whole adjustment system.