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Evaluating residues and coefficients of high order poles

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2 Author(s)
Hazony, Dov ; Case Institute of Technology, Cleveland, OH, USA and Electro-Measurements Inc., Portland, OR, USA ; Riley, J.

The powerful Laplace transform method for transient analysis by the partial fraction expansion technique has become quite popular in the fields of circuit and servo design. The theory of residues is usually used to find the coefficients of these fractions. The process is quite simple until second and higher order poles are included in the denominator. Previously, this has required a return to the calculus to find the additional coefficients required. This paper discloses a simple technique for finding these additional coefficients by algebraic processes. As a result both manual and machine computation can be performed more easily. The technique is described and its mathematical basis is rigorously proven.

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Automatic Control, IRE Transactions on  (Volume:4 ,  Issue: 2 )