MATLAB CONTROL SYSTEM TOOLBOX 9 Specifikace stáhnout pdf (Strana 54)

100

101

2 LTI Models

2-36

s + 2

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To leave certain names undefined, use the empty string '' as in

H = tf(num,den,'inputname',{ 'temperature' ; '' })

Input Groups and Output Groups

In many applications, you may want to create several (distinct or intersecting)

groups of input or output channels and name these groups. For example, you

may want to label one set of input channels as

noise and another set as

controls.

To see how input and output groups (I/O groups) work:

1 Create a random state-space model with one state, three inputs, and three

outputs.

2 Assign the first two inputs to a group named controls, the first output to a

group named

temperature, and the last two outputs to a group named

measurements.

To do this, type

h = rss(1,3,3);

set(h, 'InputGroup',{[1 2] 'controls'})

set(h, 'OutputGroup', {[1] 'temperature'; [2 3] 'measurements'})

and MATLAB returns a state-space model of the following form.

a =

x1 –0.64884

b =

u1 u2 u3

x1 0.12533 0 0

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 590 591

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