Abstract
A new Prony series approximation technique which can determine the coefficients involved in relaxation function from data obtained by the Dynamic measurement analyzer(DMA) is developed. The proposed technique keeps positive value of every coefficient and satisfies smoothness of relaxation spectrum. In order to verify the effectiveness of the proposed technique, the authors measured the storage and loss modulus by DMA, then determined the coefficients of relaxation modulus function. As results, it is confirmed that the proposed technique can automatically predict and compensate lack of the experimental data in high reliability.
