MATLAB CONTROL SYSTEM TOOLBOX 9 Spécifications télécharger pdf (Page 61)

100

101

Time Delays

2-43

Time Delays

Using the ioDelay, InputDelay,andOutputDelay properties of LTI objects,

you can specify delays in both continuous- and discrete-time LTI models. With

these properties, you can, for example, represent:

•LTI models with independent delays for each input/output pair. For

example, the continuous-time model with transfer function

•State-space models with delayed inputs and/or delayed outputs. For

example,

where is the time delay between the input and the state vector ,

and is the time delay between and the output .

You can assign the delay properties

ioDelay, InputDelay,andOutputDelay

either when first creating your model with the tf, zpk, ss,orfrd constructors,

or later with the

set command (see “LTI Properties and Methods” on page 2-4

for details).

Supported Functionality

Most analysis commands support time delays, including:

•All time and frequency response commands

•Conversions between model types

•Continuous-to-discrete conversions (

c2d)

•Horizontal and vertical concatenation

•Series, parallel, and feedback interconnections of discrete-time models with

delays

()

0.1s–

---

0.3s–

s 1+

s 10+

---------------

10 e

0.2s–

s 1–

s 5+

------------

()

Ax t

()

Bu t

–

()

Cx t

–

()

Du t

θτ

()

–

()

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 590 591

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MATLAB CONTROL SYSTEM TOOLBOX 9 Spécifications Page 61

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