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## Homework Statement

FIGURE 3 shows an open loop system containing a distance velocity lag

and a single transfer lag.

Figure 3 shows -

Xi Xo

---->----[Distance - velocity lag of 4.0s]---->----[single transfer lag if t=5s]---->----

If the system input Xi is subjected to a step disturbance from 2 units to 12 units, plot the response of Xo on a base of time. Determine graphically, and verify mathematically, the time taken for the output to change by 4 units.

I know the guidelines but I am at a lost for where to even start with this. I don't know what it means by 'units' and this is not discussed anywhere in the learning materials I have been given. The learning materials also only briefly cover single transfer lags and I can't find any information about 'single' transfer lags on google. Only first-order lag, linear lag and exponential lags. Could it be that it has been worded differently and actually means something else?

If anyone could just give me guidance on how to even start this or any information that might be helpful is appreciated, Thanks!

## Homework Equations

output change = input change (1-e^-t/T)