二维拉普拉斯变换数值反演的应用

Chao Zhang, Shaohai Hu, Yang Xiao, Xue-fen Wang
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引用次数: 4

摘要

由于二维连续时空系统是用线性二维偏方程来描述的,通常不可能得到连续时空系统的闭解。为了得到CST系统的时空响应,需要进行二维拉普拉斯逆变换。然而,对于不稳定CST系统不存在二维拉普拉斯逆变换(ILT),本文提出了一个定理来保证稳定CST系统得到二维拉普拉斯逆变换。本文给出了求解CST系统的方法,并推导了用于CST系统矢量时空响应分析的数值二维ILT算法。
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The application of 2-D numerical inversion of Laplace transform
For the 2D continuous space-time (CST) systems are described by linear 2-D partial equations, generally, it is impossible to get the closed solutions of the CST systems. To get the space-time response of CST systems needs the inverse 2-D Laplace transform. However, the 2-D inverse Laplace transform (ILT) does not exist for unstable CST, a theorem is proposed to ensure the 2-D ILT to be obtained for stable CST systems. In this paper, we present the approach to get the solutions of CST systems, we also derive an algorithm of numerical 2-D ILT for the vector spatial-time response analysis of CST systems.
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