Chapter 4 System Analysis
Xmath Control Design Module 4-10 ni.com
(s + 1) (s + 0.79s + 0.16)
initial integrator outputs
0
0
0
0
Input Names
-----------
Input 1
Output Names
------------
Output 1
System is continuous
Note G2 matches the system G where residues were computed in Example 4-4.
General Time-Domain Simulation
When modeling a dynamic system and trying to determine its response to
the input values it is likely to receive in use, you generally will want to
simulate system behavior with more general input signals than the zero or
step inputs used in initial( ), impulse( ), and step( ). To do this,
use the * operator between a dynamic system object and a PDM containing
the input data you want to use in the simulation.
Borrowing from the standard frequency response notation for a system
where:
Xmath defines the operation system*PDM as a time domain simulation.
Thus for any dynamic system Sys (continuous or discrete) and for a PDM
urepresenting the external stimulus as a function of time, the operation
y=Sys ×u creates a PDM y which contains the outputs of the system as
a function of time.
For a dynamic system with ny outputs and nu inputs, the input vector is
defined to be ny×1 and the output vector is ny×1. Thus the input PDM
ushould be m×1×p, where p is the number of time points in u.
ys() Hs() us()×=