# doubt in time shifting the signal

Discussion in 'Homework Help' started by bhuvanesh, Feb 17, 2015.

1. ### bhuvanesh Thread Starter Member

Aug 10, 2013
268
2

i am experiencing problem in time shift when the signal is in negative axis .Help me solve this.Thank you in advance

2. ### shteii01 AAC Fanatic!

Feb 19, 2010
3,500
511
f(t) and w(t) are the same. But they are located in different places on the t axis.

If you shift f(t) 2 places to the right, f(t) becomes w(t). So. w(t)=f(t-2)

The general formula (straight from the first chapter of my textbook) is this:
w(t)=f(t-T)
- if T is positive, the signal is shifted right (delayed).
- if T is negative, the signal is shifted left (advanced).

If your textbook can not explain shifting, then you really need to be afraid of convolution.

bhuvanesh likes this.

Aug 10, 2013
268
2
got it

4. ### glaxy New Member

Feb 23, 2015
1
1
only have basic skills with PLC programming. I think it might be the FX PLC ? I have the first few lines however I'm unsure on the sensor part to stop the conveyor belt and restart. Thanks for the reply smug post have good!!!!!!!!!!!!!!!!!