- Project Log (with links to Detail Drawings)
Analog inputs:
-- Using a potentiometer, we sent signals to LabView where the values could be read.
-- Using a signal generator, we sent signals through an analog input to LabView where the values were received and recorded.
LabView Data:
-- Results from the signal generator procedure are shown here.
There is a potentiometer providing inputs to the controller as to the position of the motor. The user inputs a specified number of revolutions of the motor shaft and the controller will turn the required amount. As the number of turns approaches the specified value, it will decrease its speed until it stops in the right place. At certain values of Ki the motor will overshoot the required number of turns, stop, and reverse direction until the right position is located. In our experiment, we changed values of Kp, Ki, and Kd, and performed one test with nominal values. All tests began with the potentiometer at 1000 and were run until it reached 2000 (i.e. 5 turns).
Test 1: Kp=1.0 Kd=.01 Ki=.01
Test 2: Kp=2.0 Kd=.01 Ki=.01
Test 3: Kp=1.0 Kd=.01 Ki=.50
Test 4: Kp=1.0 Kd=.50 Ki=.01
Pictures of the project
This is a picture of the whole set-up (i.e. gears, string mounts, circuit).
This is a close-up picture of the gears. You can also see a toggle switch which allows the user to turn the motor off once the string is tuned.
In this picture, you will see a side view of the axles and bearings as well as the means of clamping the bearings down.
Click here to see the microphone.
Last Revised: January 10th, 1997
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