This is the second part of a two-part study of linear multimode system
s. In the first part, it was argued that the behavior of such a system
on an interval between switches should be described in a framework th
at allows for impulses at the switching instant, and both first-order
and polynomial representations were introduced that satisfy this requi
rement. Here we determine the conditions under which first-order repre
sentations are minimal. We also show how two minimal representations o
f the same behavior are related; this leads in particular to an approp
riate state-space isomorphism theorem. The minimality conditions are g
iven a dynamic interpretation. Copyright (C) 1996 Elsevier Science Ltd
.