用基于Chebyshev展开的NILT进行传输线的瞬态分析

本文提出了用基于Ｃｈｅｂｙｓｈｅｖ多项式展开的ＮＩＬＴ（数值拉普拉斯反变换）进行传输线瞬诚分析 方法。文中介绍了方法的基本原理，分析了实际应用中误差产生的原因，并给出相应的措施：通过引入Ｌａｎｃｚｏｓ因子对通近结果的平滑，与ＮＩＬＴ的重新启动，最后用实例说明了方法的应用。结果表明这种方法较目前传输线分析中通用的ＮＩＬＴ方法及卷积法都有更快的速度。

Transient Analysis of Transmission Lines Using Chebyshev Expansion Based NILT

A new method for the transient analysis of transmission lines using the Chebyshev expansion based NILT is presented in this paper.The straightforward application of the method results in significant computational errors.The reason for this is investigated and two techniques to reduce the errors,one is the smoothing of the Chebyshev approximation by the use of the Lanczos factor,and the other the resetting of the NILT,are proposed.Illustrative examples are given and the results show that the method is more efficient than the previous convolution as well as NILT based approaches.