To overcome the long test time and big error in single variable open loop step test method, a novel identification method based on asymptotic theory (asym) is presented.
为克服传统单变量开环阶跃测试法测试时间长和误差大的缺点，提出一种基于渐进黑箱理论的多变量辨识方法。
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The transition from the rectangular waveguide to the cavity coupler in LINACis made by means of a matching iris, which leads to amplitude and phase asym-metries of fields in the cavity coupler.