Reliable Computations

Choice of LTI Model

Now turn to the implications of the results in the last section on the linear modeling techniques used for control engineering. The Control System Toolbox includes the following types of LTI models that are applicable to discussions of computational reliability:

• State space
• Transfer function, polynomial form
• Transfer function, factored zero-pole-gain form

The following subsections show that state space is most preferable for numerical computations.

Numerical Stability

State Space