Day 17

RLC Circuit Response

This lab will emphasize modeling and testing of a second order circuit containing two resistors, a capacitor, and a n inductor. In this assignment, the step response of the given circuit is analyzed and tested. The measured response of the circuit is compared with expectations based on the damping ratio and natural frequency of the circuit. 

In the pre-lab, we calculated the value depends on given value, R1=47, R2=1.1, C=10uF, L=1mH. and according the image of setting up, the R2 and L is series, and C is parallel with R2 and L, then R1 series with all of them.

The circuit is set up on breadboard. 

The picture is about input power, This is a square wave with 100Hz, its peak is 2V with offset 0. 

The picture is Vout.

                                 R1                      R2                       C                          L

experiment value       49Ohm                4.3Ohm              9.92uF                 cannot measure

In the lab, we calculated value of α is 3588.7, but the theoretical value is 1063.8. Its precent difference is -237.4%. 

Summary:

Today, we learned how to calculate the resistor, capactior and inductor in parallel.