O'Reilly logo

Process Control: Modeling, Design, and Simulation by B. Wayne Bequette

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

M4.2. Forming Discrete-Time Models

The formation of discrete-time models is the same as for continuous-time models, except that a sample time should also be specified. This sample time is simply the next argument in the function call statement,

sys  =  ss(a,b,c,d,Ts)  % discrete state space
sys  =  tf(num,den,Ts)  % discrete transfer function
sys  =  zpk(z,p,k,Ts) % discrete zero-pole-gain

where Ts is the sample time.

Discrete State Space Models

A discrete-time state space model has the form

where k represents the discrete-time step index. Consider the discrete state space model

with a sample time of Δt = 0.1 minutes. Please note that, if you need ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required