MATLAB CONTROL SYSTEM TOOLBOX 9 Podręcznik Użytkownika Pobierz pdf (Strona 485)

100

101

impulse

11-95

As with bode or plot, you can specify a particular color, linestyle, and/or

marker for each system, for example,

impulse(sys1,'y:',sys2,'g--')

See “Plotting and Comparing Multiple Systems” on page 5-13 and the bode

entry in this chapter for more details.

Wheninvokedwithlefthandarguments,

[y,t] = impulse(sys)

[y,t,x] = impulse(sys) % for state-space models only

y = impulse(sys,t)

return the output response y, the time vector t used for simulation, and the

state trajectories

x (for state-space models only). No plot is drawn on the

screen. For single-input systems,

y hasasmanyrowsastimesamples(length

t), and as many columns as outputs. In the multi-input ca se, the impulse

responses of each input channel a re stacked up along the third dimension of

The dimensions of

y are then

and

y(:,:,j) gives the response to an impulse disturbance entering the jth

input channel. Similarly , the dimensions of

x are

Example To plot the impulse response of the second-order state-space model

length of

t()

number of outputs

()

number of inputs

()××

length of

t()

number of states

()

number of inputs

()××

0.5572– 0.7814–

0.7814 0

11–

1.9691 6.4493

1 2 ... 480 481 482 483 484 485 486 487 488 489 490 ... 648 649

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