Fourier Series: Stamping Machine Positioning Function

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Discussion Overview

The discussion revolves around the challenge of converting a specific function related to a stamping machine's positioning into a trigonometric Fourier series. Participants are exploring the necessary steps and equations involved in this conversion, particularly focusing on the use of sigma notation and Fourier transforms.

Discussion Character

  • Homework-related
  • Mathematical reasoning

Main Points Raised

  • One participant expresses difficulty in converting the given function into sigma notation and starting the Fourier transform, seeking guidance without wanting a complete solution.
  • Another participant suggests using the definition of the Fourier series on the provided function, although they note the exercise seems unusual due to the rough approximation of the function for the slide block's movement.
  • Brad clarifies that the specific function in question is x(t) = r(1-cos(t-psi)), indicating that the conversion to the trigonometric Fourier series is the primary issue they are facing.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the approach to take, and multiple views on the nature of the exercise and the function's approximation remain. The discussion is ongoing and unresolved.

Contextual Notes

There is a lack of clarity regarding the relevant equations and definitions that should be applied, as one participant notes they cannot check the definitions due to missing information in the original post.

bradzyc
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Homework Statement


9c14af2b05.png

Homework Equations


All Fourier series trigonometric equations. I think we are required to use sigma function, integrals, etc.[/B]

The Attempt at a Solution


We are currently working through our Fourier series revision studying integrals of periodic functions within K.A. Stroud's book, Advanced Engineering Mathematics. However, we cannot fathom how to convert the above equation into the sigma notation or even start the Fourier transform. Any indication on what we need to look at would be a massive help. Obviously I don't want this completed for me, just an idea would really help to bounce some ideas from.

As a side note, I'm fairly new to this forum and haven't used this account in a long time so if I breach any rules etc I do apologise!

Many thanks,
Brad
 

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bradzyc said:
However, we cannot fathom how to convert the above equation into the sigma notation or even start the Fourier transform. Any indication on what we need to look at would be a massive help
Well, you've got the definition of the Fourier series as one of your relevant equations (can't check -- you don't post them). The idea is that you let that loose on the given function :smile:

Must say I find this a weird exercise (didn't find the term 'Fourier' in 5th ed ?) since the given function is a rather rough approximation for the movement of the slide block.
 
Moderator note:

Hi bradzyc, I found your thread title to be too generic so I changed it to "Fourier Series: Stamping Machine Positioning Function" to make it more specific and descriptive of the problem.
 
BvU said:
Well, you've got the definition of the Fourier series as one of your relevant equations (can't check -- you don't post them). The idea is that you let that loose on the given function :smile:

Must say I find this a weird exercise (didn't find the term 'Fourier' in 5th ed ?) since the given function is a rather rough approximation for the movement of the slide block.

Hi, any thanks for the response. The actual problem we're having is converting the x(t) = r(1-cos(t-psi)) as the trigonometric Fourier series. We can use the MATLAB simulations etc but the first conversion is our issue.

Many thanks,
Brad
 
gneill said:
Moderator note:

Hi bradzyc, I found your thread title to be too generic so I changed it to "Fourier Series: Stamping Machine Positioning Function" to make it more specific and descriptive of the problem.
Not a problem, many thanks for the help!
 

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