How can adjust the delay ?

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

[Prakhar Jain]

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]

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

Answer 1

[Dimitris Kalogiros]

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 .

[Sarfaraz Ahmed]

Thanks. I can't give other signal delay as timing of those signal will change. therefore, I need to make advance this signal compare to main signal.

[Dimitris Kalogiros]

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]

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