Modern Control Systems: An Introduction

The state model of a linear single-input-single-output system can be obtained by putting m = 1 and p = 1 in the state model of a linear multi-input-multi-output system as
d = Transmission Constant
u(t) = Input or Control Variable (scalar)
and, y(t) = Output Variable (scalar).
The block-diagram representation of the state model of linear single-input-single-output system is shown in Figure 1.3.