User`s guide

Arithmetic Operations
3-11
Arithmetic Operations
You can apply almost all arithmetic operations to LTI models, including those
shown below.
To understand how these operations work on LTI models, it’s useful to keep in
mind the matrix analogy for systems discussed in “Viewing LTI Systems As
Matrices” on page 2-5.
Addition and Subtraction
As mentioned in “Viewing LTI Systems As Matrices” on page 2-5, adding LTI
models is equivalentto connecting them in parallel.Specifically, the LTI model
sys = sys1 + sys2
Operation Description
+
Addition
– Subtraction
*
Multiplication
/
Right matrix divide
\
Left matrix divide
inv
Matrix inversion
'
Pertransposition
.'
Transposition
^
Powers of an LTI model (as in s^2)