(5/2/2017) Day 18: 2nd Order Circuits and Series RLC Circuits Step Response

Day 18: 2nd Order Circuits

Lab: Series RLC Circuit Step Response

This lab introduced the modelling and testing of a series RLC circuit.

Prelab:

We were asked to write a second order equation for the RLC circuit in question.

Doing this gave us a damping ratio equation we can use that gives us a value of 0.005
This is less than 1, showing us that the circuit acts as an underdamped case!

With this in mind we continued on to the exercise.

Procedure:

After building the circuit, we hooked up an oscilloscope probe to read the output for comparison.

Here is the analog discovery input to the circuit

and the output voltage for the capacitor.

This is actually close to the behavior we expected to see from an underdamped squarewave input, albeit not as exaggerated.