MATLAB CONTROL SYSTEM TOOLBOX 9 Guide de l'utilisateur télécharger pdf (Page 106)

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3 Operations on LTI Models

3-2

Introduction

You can perform basic matrix operations such as addition, multiplication, or

concatenation on LTI models. Such operations are “overloaded,” which means

that they use the same syntax as they do for matrices, but are adapted so as to

apply to the LTI model context. These o verloaded operations and their

interpretation in this context are discussed in this chapter. You can read about

discretization methods in this chapter as well. The following topics and

operations on LTI models are covered in this chapter:

• Precedence and Property Inheritance

• Extracting and Modifying Subsystems

• Arithmetic Operations

• Model Interconnection Functions

• Continuous/Discrete-Time Conversions of LTI Models

• Resampling of Discrete-Time Models

These operations can be applied to LTI models of different types. As a result,

before discussing operations on LTI models, we discuss model type precedence

and how LTI model properties are inherited when models a re combined using

these operations. To read about how you can apply these operations to arrays

of LTI models, see “Operations on LTI Arrays” on page 4-25. To read about the

available functions with which you can analyze LTI models, see Chapter 5,

“Model Analysis Tools,”

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