Creating and Manipulating Models

Example: Addition of Two LTI Arrays

The following diagram illustrates the addition of two 3-by-1 LTI arrays sys1+sys2.

Figure 4-8: The Addition of Two LTI Arrays

The summation of these LTI arrays

sysa = sys1+sys2

is equivalent to the following model-by-model summation.

for k = 1:3
  sysa(:,:,k)=sys1(:,:,k) + sys2(:,:,k)
end

Note that:

• Each model in sys1 and sys2 must have the same number of inputs and outputs. This is required for the addition of two LTI arrays.
• The lengths of the array dimensions of sys1 and sys2 must match.

Operations on LTI Arrays

Dimension Requirements