Description parallel connects two LTI models in parallel. This function accepts any type of LTI model. The two systems must be either both continuous or both discrete with identical sample time.
Static gains are neutral and can be specified as regular matrices.
Similarly, the index vectors out1 and out2 specify which outputs of sys1 and which outputs of sys2 are summed. The resulting model sys has as inputs and as outputs. Example See page 7-53 in the User's Guide for an example.