Free Trial

Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.


  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint

M16.1. Background

The focus of this textbook has been on continuous systems although, in practice, most controllers are implemented digitally. Fortunately, the sample time is usually small compared with the process dynamics, so continuous systems theory is usually sufficient.

Processes are best described as continuous systems (with differential equation models), with inputs that are applied continuously and outputs that are available continuously. With digital controllers, however, measurements are made at discrete intervals of time and control moves are made at discrete intervals of time. Discrete-time models were developed in Chapter 4 and the conversion of continuous time to discrete time models (using LTI objects in MATLAB) were presented in Module 4.


  

You are currently reading a PREVIEW of this book.

                                                                                                                    

Get instant access to over $1 million worth of books and videos.

  

Start a Free 10-Day Trial


  
  • Safari Books Online
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint