Adding Harmonics to Form the Final Signal

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Discussion Overview

The discussion revolves around the synthesis of signals using harmonics, particularly in the context of understanding the relationship between fundamental frequencies and their harmonics. Participants explore the formulation of these signals, including the effective value and graphical representation, as well as specific mathematical expressions related to cosine functions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant questions the formula for the resulting harmonic and the meaning of synthesizing in this context.
  • Another participant emphasizes the importance of including frequency, time, and phase shift in the cosine function and raises questions about the use of A0/2 and the definitions of fundamental frequency and harmonics.
  • Graphing the signal is suggested as a method to visualize the harmonics.
  • A participant expresses uncertainty about the A0/2 term but acknowledges its presence in literature, seeking clarification on the formula involving (2PI/T)*t and its components.
  • One participant proposes a structure for the signal, starting with the base harmonic divided by 2 and adding other harmonics, while providing specific values for frequency and phase angle.
  • Clarification is provided regarding the period (T) in relation to frequency, specifically for a 50 Hz signal.

Areas of Agreement / Disagreement

Participants express uncertainty about specific terms and formulas, and there is no consensus on the correct interpretation of A0/2 or the overall formulation of the signal. Multiple viewpoints regarding the structure of the signal and its components remain present.

Contextual Notes

Unresolved aspects include the definitions and implications of A0/2, the exact formulation of the cosine function, and the interpretation of frequency and period in relation to harmonics.

MisterP
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Homework Statement
Hello. Could someone help me?
I have to:
1) from given harmonics syntesize signal
2) calculate effective value of signal
3) represent resultant signal
Specs:
I assume frequency is 50hz
Table given below
Relevant Equations
A0/2 + A1*cos ("what goes here?" + Fi1) + etc..
Formula I have shows is probably for resulting harmonic? Does syntesizing mean writing the main formula? I havo no clue about effective value of signal and representation is probably done in excel or other graphing app.

harmonikas.sized.jpg
 
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Inside the cosine should be a frequency *time + phase shift. What do you know about the harmonics in relation to the fundamental frequency? Are you sure about the A0/2 ? Usually f0 would be the fundamental freq. Then f1 is first harmonic etc.
 
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scottdave said:
Inside the cosine should be a frequency *time + phase shift. What do you know about the harmonics in relation to the fundamental frequency? Are you sure about the A0/2 ? Usually f0 would be the fundamental freq. Then f1 is first harmonic etc.
Thanks for response. I am not sure about A0/2, but I have seen it in books. I found formula where it says (2PI/T)*t + phase comes in cosine function. What is "(2PI/T)*t"? PI refers to 3.14
 
Ok, I have come to some conclusion, i hope it is right.
So, first comes base harmonic and it is devided by 2. A0/2, then adding other harmonics + A1*cos(314-0.68) + etc
So, 314 is because I have 50hz frequency and -0.68 is my angle in radians.
 
MisterP said:
Thanks for response. I am not sure about A0/2, but I have seen it in books. I found formula where it says (2PI/T)*t + phase comes in cosine function. What is "(2PI/T)*t"? PI refers to 3.14
Sorry for being slow to reply. In this context T is the Period (time of one complete cycle). In your example of 50 Hz frequency, the period is (1/50) seconds.
 

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