Engin 103

Project 3

LabVIEW: Demo of Beats and Spectrum of a Signal

Signals constitute a basic ingredient of our daily lifes. A signal is a function of one or more variables that conveys information on the nature of a physical phenomenon. Signals obey the principle of superposition. You have already observed in Project 2 how the signals from two different sources interact with each other to produce beats. Signal processing is an important task of the electrical engineers, which is done with the help of a computer.

In this project, you are required to work in teams to write two LabVIEW virtual intruments (VI’s): one to demonstrate, once more, the beat phenomenon, now using a computer, and the other one to extract the frequency spectrum of a signal that will be given to each team.

Each team will do a 5 minute presention on their device in each of the two presentation days. In the first day, the teams will give an introduction (how did they build their VI, what is special, what it does, etc.) followed by the demonstrations. In the second day, each team will be given a “.wav” file which they will feed into their VI and run it to show how many components the signal contained . The webpage on the project, along with the project report will be due the class after the second day of the presentations (please check the e-syllabus for exact dates). A progress report on the project will be due about a week before the first of the two presentation days (please check the e-syllabus for exact date). The project report is expected to be a good written document (see Good Writing Practices), and graded under three categories: correct grammar and neat presentation; logical arguments and structure; accurate report of the team project, completeness, and no plagiarism. Project report will be submitted in hardcopies with member signatures and also in electronic form (see Computer Files: Names and Electronic Submissions). A complete report should include the following sections:

-Introduction: brief description of project objectives in your own words, background information needed for the design with emphasis on predictability of the “roulette of fortune”, work distribution among the team members, and timelines for the different parts of the project: research, design, building, analysis/testing.

-Design and building: this section should include sketches and diagrams: the Block Diagrams, explaining each elements used.

-Analysis/Testing.

-Conclusion: overview of the team achivement and lections learned for the future.

Grades will be computed as follows:

Items			Points
Project completed, if presented both days			50
Project performance (performed specified tasks)			10
Good design (predictability: existence of a function relating starting force to resulting rotation)			10
Project presentation and webpage			10
Written reports	Progress report		5
	Project report: will not accepted without all member’s signatures on percentage of participation	Grammar and presentation	5
		Logical arguments; structure	5
		Accurate and complete	5
Total project grade			100