Recurrent misconceptions in sampled-data/digital-control textbooks. II

For pt.I, see Proc. 17th Southeastern Symposium on System Theory, p.188 (1985). This paper is a continuation of an earlier paper and is concerned with pointing-out, correcting and illustrating by an example, certain recurring misconceptions, errors, oversights, etc. That commonly appear in sampled-data/digital-control textbooks. In the present paper attention is focused on the correction of (i) an incorrect “solution expression” for difference equations having repeated zero-valued characteristic roots, (ii) incomplete discretizations of n^th-order linear plant models, and (iii) inappropriate credit for the Z-Transform idea