Laplace Transform and the Analysis in the s-domain
- Work Exercises 4, 20, 22, 27 and 37 from Chapter 14.
- Work Exercises 11 and 16 from Chapter 15.
- Save all the work in HW6_StudentID and upload. Show all work for full credit.
Laplace Transform and Analysis in S-Domain
This week’s lab is based on the application of circuit analysis techniques to a capacitive circuit with Multisim. You will learn to utilize Multisim to perform the mesh analysis.
- Watch video entitled “Week 6 – Oscillator Circuits in Multisim”
- Design a Wein bridge Oscillator in Figure 15.39 in Multisim to generate a sinusoidal signal at frequency of 300Hz. Consider a capacitor of 1uF, resistor R = 5950Ω, R1 = 3Ω, Rf = 6.05Ω for the oscillator circuit.
- Determine output voltage ‘Vo’ and run the simulation to plot the output of the oscillations at frequency of 300 Hz using an oscilloscope.
- Increase the frequency to 500Hz, 800Hz and 1000Hz and plot the output of the oscillator at these multiple frequencies.
- Take the screen capture of the oscilloscope readings for all the frequencies.
- Answer the following questions:
- What is the requirement to generate oscillation in the circuit? Is the circuit stable or unstable?
- What do you observe in the oscillations when the frequency is increased?
- With increased frequency, did you observe the oscillations? If not what did you adjust to observe the oscillations?
- Explore different practical applications of oscillator circuits and explain.
- Create a new word document called “Lab6_StudentID.docx” with your GID substituted into the file name.
- Save the simulation results from step 2 along with the measurements and screen captures. Make sure to answer the questions in step 6.
- Upload file “Lab6_StudentID”
Work the problems below. To receive any credit, you must show all work. You may submit your work in a word processing document or in a pdf file. Graphic files are not acceptable submissions. Your file submission document should be entitled Week6AYourGID (replace YourGID with your specific GID).
- An SCR with a 5V gate trigger level is used with a 12V zener diode, and the capacitor is 0.15uF. What value of R2 will give full control of the power to the load down to zero?
- A stepping motor has 120 steps per revolution. Find the digital input rate that produces 10.2 rev/s.
- What force is generated by a 85 kPa acting on a 25 cm2 area diaphragm?
- Find the proper valve size in inches for pumping a liquid flow rate of 580 gal/min with a maximum pressure difference of 50 psi. The liquid specific gravity is 1.3.The SCR in Figure 1 below requires a 3 V trigger. Using Multsim, design a system by which the gears are shifted when a CdS photocell resistance drops below 4kohms.
Final Control Lab
- The SCR in Figure 1 below requires a 3 V trigger. Using Multsim, design a system by which the gears are shifted when a CdS photocell resistance drops below 4kohms.
- Using Multisim, design a system by which a control signal of 4 to 20 mA is converted into a force of 200 to 1000N. Use a pneumatic actuator and specify the required diaphragm area if the pressure output is to be in the range of 20 to 100kPa. An I/P converter is available that converts 0 to 5 V into 20 to 100 kPa. A block diagraph of the system is shown below. (Hint: Use a differential amplifier. You are only designing the circuit to interface into the I/P below)