MATLAB CONTROL SYSTEM TOOLBOX 9 Dokumentacja Pobierz pdf (Strona 378)

100

101

connect

16-38

inputs = [1 2 15];

outputs = [2 7];

The final model sysc has these particular inputs and outputs.

Sinceitiseasytomakeamistakeenteringallthedatarequiredforalarge

model, be sureto verify yourmodel in as many ways as you can. Here are some

suggestions:

• Make sure the poles of the unconnected model

sys match the poles of the

various blocks in the diagram.

• Check that the final poles and DC gains are reasonable.

• Plot the

step and bode responses of sysc and compare them with your

expectations.

If you need to work extensively with blockdiagrams, Simulink is a much easier

and more comprehensive tool for model building.

Example Consider the following block diagram

Given the matrices of the state-space model

sys2

A = [ -9.0201 17.7791

-1.6943 3.2138 ];

B = [ -.5112 .5362

-.002 -1.8470];

C = [ -3.2897 2.4544

Ax Bu+=

yCxDu+=

2 s 1+

()

s 2+

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

s 5+

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

sys1

sys2

sys3

–

1 2 ... 373 374 375 376 377 378 379 380 381 382 383 ... 590 591

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MATLAB CONTROL SYSTEM TOOLBOX 9 Dokumentacja Strona 378

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