How can adjust the delay ?

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Sarfaraz Ahmed 2018-11-5

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编辑： Sarfaraz Ahmed 2018-11-15

96.PNG

Hi. I am adjusting delay backward by using " variable time delay" block in simulink but its only forward the delay not backward. how can I adjust the delay in negative direction ? Please have a look into attached file and the waveform. I want to adjust the delay which is in 3rd plot.

Thanks

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Prakhar Jain 2018-11-15

Hi Sarfaraz,

Can you change -0.002 constant block value to 0.002. Still if you doesn't get the required output, please share your simulink model.

Thanks.

Sarfaraz Ahmed 2018-11-15

Thanks Jain. yes, I checked with 0.002 and I see it only produce delay in one direction. I want delay in the advance ? is it possible to delayed a signal by advance ?

Thanks

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Answer 1

Dimitris Kalogiros 2018-11-15

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编辑：Dimitris Kalogiros 2018-11-15

If you want to insert "negative" delay (-0.002) at one signal x(t) , into your simulink model you can do the following:

Add 0.002 delay to all other relevant signals and leave signal x(t) without any delay.

For example, at the following block diagram, signal sig2 has a "negative delay" of 1 sample regarding signals sig1 and sig3 .

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Dimitris Kalogiros 2018-11-15

编辑：Dimitris Kalogiros 2018-11-15

Is it possible to "make advance" of a signal ?

Such a thing would violate the causality principle.

A simulink block which is able to produce at its output what would be present at its input 0.002sec later, is not a simulink block .... It is a "Harry Potter block"

:-)

Sarfaraz Ahmed 2018-11-15

编辑：Sarfaraz Ahmed 2018-11-15

hahahhaha..... I undersatnd. I think I have to make then some tricks with signal as you described. I am accepting your answer. Thank you!

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