MATLAB CONTROL SYSTEM TOOLBOX 9 Specifiche Scaricare il pdf (Pagina 51)

100

101

LTI Properties

2-33

Properties” on page 2-25. For detailed information on the use of InputDelay,

OutputDelay

,andioDelay, see “Time Delays” on page 2-43.

Sample Time

The sample timeproperty Ts is usedto specify the sampling period (inseconds)

for either discrete-time or discretized continuous-time LTI models. Suppose

you want to specify

as a discrete-time transfer function model with a sampling period of 0.5

seconds. To do this, type

h = tf([1 0],[2 1 1],0.5);

This sets the Ts property to the value 0.5, as is confirmed by

h.Ts

ans =

0.5000

For continuous-time models, the sample time property Ts is 0 by convention.

For example, type

h = tf(1,[1 0]);

get(h,'Ts')

ans =

To leave the sample time of a discrete-time LTI model unspecified, set Ts to .

For example,

h = tf(1,[1 –1],–1)

produces

Transfer function:

-----

z – 1

()

z 1++

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

1–

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 590 591

Commenti su questo manuale

Nessun commento

MATLAB CONTROL SYSTEM TOOLBOX 9 Specifiche Pagina 51

Commenti su questo manuale

Prodotti e manuali riguardandi Software MATLAB CONTROL SYSTEM TOOLBOX 9