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ROBUST DESIGN OF DIGITAL-DIGITAL DYNAMIC SYSTEM

ABSTRACT Problems where the output varies depending on the input are classified as dynamic systems in the Taguchi method. In dynamic system, if both input and output have only two digital values (0 and 1) with the possibility of committing two types of errors (judging 0 as 1 and 1 as 0), such a problem is called “digital-digital” dynamic problem. Taguchi recommended calculating the equalized error rates first and then obtaining the standardized signal-to-noise ratio based on the two errors with the same loss coefficient to optimize the parameter settings for such a problem. However, the losses due to the two types of errors are not equal in practice, especially in the field of chemistry. This paper proposes a general model for analyzing the digital-digital dynamic system. The implementation and the effectiveness of the proposed approach are illustrated through two cases.