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拉氏反变换可直接用查变换表法或传递函数的部分分式展开法求得.在用部分分式展开法时,往往很难确定部分分式展开式的系数值.本文根据C.F.Olsen和C.G.Brockus提出的一种含有多重实极点或复极点函数的拉氏反变换的新算法,结合劈因子求根法,用PASCAL和BASIC两种语言编制了程序(分别在DUAL 68000和PDP-11/23计算机上调试通过),这样就能很好地解决这个困难,完成拉氏反变换. 本文只介绍用PASCAL语言编制程序所用的框图,并对程序中用到的两个公式作简单证明.在程序运行中发现了一些问题,提出了解决的工程方法.
Laplace inverse transform can be directly used to find the transformation table or transfer function of partial fractional expansion method obtained in the partial partial expansion method, it is often difficult to determine the partial fractional expansion coefficient values.This paper according to CFOlsen and CGBrockus proposed a new Laplace inverse algorithm with multiple real or complex pole functions. Combined with the split root factorization method, programs were compiled in PASCAL and BASIC (DUAL 68000 and PDP-11 / 23 on the computer debugging), so that we can solve this difficult to complete the inverse Laplace transform.This article describes only the PASCAL programming language used in the block diagram, and the program used in the two formulas for simple proof. Some problems were found in the running of the program, and the engineering methods to be solved were put forward.