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2. Set the simulation time to run for 2.5 seconds

3. Use the Monitor & Tune button

on the Hardware tab, to Run the Model.

The motor should start turning then stop after 2.5 seconds

4. Open the two scope windows to display the voltage waveforms. They should look

similar to the ones below in Figure 2-2. Include READABLE plots of the scope

traces in your lab report. Make sure they are labeled properly in your lab report.

(Note that you can print to a figure from the scope file menu. This figure can then

be saved as a JPEG file from the figure file menu.)

a) Step Voltage

b) Motor Speed

5. Use the scopes measurement feature to measure the output speed where it is

constant. Record this speed in your lab report. This is the steady-state speed.

and the units are in radians/sec.

6. Use the scopes measurement feature to measure the time constant. Remember

the Motor speed output is of the form:

You can measure the time constant by measuring the speed, wu(te) and stu(Fs).

at two different times, t, and t,, on the rising edge of the speed curve. This

results in the two equations shown below:

(²₂) = ₂(1-²¹6/)

(12)=(1-gall")

Combining these two equations and solving for r results in:

-(1₂-16)

(2015-(02))

In

Show the calculations and the resulting time constant in your lab report.

7. Find the steady state gain by using the step input voltage and the steady-state

speed you measured in step 5. Show the calculations in your Lab report.

Fig: 1