How to find a ratio of a current value of signal to its previous value in Simulink?

Hello,

I have a vector, R=[17 0 -10] which represents a coordinate of a mass. I modeled the equations of motions in Simulink and R vector changes as time goes by correctly. However, I want to find the ratio between the current value of R and previous value of R. For example,

at time=0, R(i)=[17 0 -10]

at time=0+dt, R(i+1)=[17.1 0 -9.99]

So, I want to find R(i+1)/R(i).

Thank you.

Answer 1

[Jonas]

Use Unit Delay block to store the previous signal value.

Use Divide block to take the division of the signal and the output of the Unit Delay block.