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Complete low pass report design part

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Apostolos Fanakis 6 years ago
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  1. 1
      report/0_intro/0_intro.pug
  2. 1
      report/1_low_pass/1_low_pass.pug
  3. 292
      report/1_low_pass/1_low_pass_design.pug
  4. 156
      report/1_low_pass/assets/diagrams/inverse_chebyshev_unit_1_zero_pole_grouping.svg
  5. 167
      report/1_low_pass/assets/diagrams/inverse_chebyshev_unit_2_zero_pole_grouping.svg
  6. 84
      report/1_low_pass/assets/diagrams/inverse_chebyshev_zero_pole.svg
  7. 23
      report/1_low_pass/assets/diagrams/low_pass_notch_unit_diagram.svg
  8. 3
      report/report.pug

1
report/0_intro/0_intro.pug

@ -1,3 +1,4 @@
div(style="page-break-before:always")
// Chapter title
h2 Εισαγωγή
br/

1
report/1_low_pass/1_low_pass.pug

@ -1,3 +1,4 @@
div(style="page-break-before:always")
// Chapter title
h2 Κατωδιαβατό φίλτρο Inverse Chebyshev
br/

292
report/1_low_pass/1_low_pass_design.pug

@ -15,7 +15,9 @@ figure.block-center.width-15cm
div.item Έλεγχος των κερδών των μονάδων και ρύθμιση κέρδους με επιβολή απόσβεσης ή ενίσχυσης.
h4 Υπολογισμός συνάρτησης μεταφοράς
p Αρχικά σχεδιάζεται ένα πρότυπο κατωδιαβατό Chebyshev φίλτρο, το οποίο αργότερα να μετατραπεί στο επιθυμητό αντίστροφο Chebyshev.
p.
Αρχικά σχεδιάζεται ένα πρότυπο κατωδιαβατό Chebyshev φίλτρο, το οποίο αργότερα να μετατραπεί στο επιθυμητό αντίστροφο Chebyshev.
p Γίνεται κανονικοποίηση των συχνοτήτων ώστε να επιτευχθεί Ω#[sub s]=1 rad/s:
@ -113,7 +115,7 @@ p.latex-equation.
p.
Οι πόλοι και τα μηδενικά του φίλτρου φαίνονται στο παρακάτω διάγραμμα:
figure.block-center.width-15cm
figure.block-center.width-19cm
img(src="1_low_pass/assets/diagrams/inverse_chebyshev_zero_pole.svg").width-19cm
//- include assets/diagrams/inverse_chebyshev_zero_pole.svg
figcaption
@ -121,8 +123,294 @@ figure.block-center.width-15cm
.caption.
Πόλοι και μηδενικά του αντίστροφου Chebyshev
p.
Οι πόλοι και τα μηδενικά ομαδοποιούνται όπως φαίνεται στο παρακάτω διάγραμμα:
figure.block-center
.ui.grid
.two.wide.column
.three.wide.column
.row
img(src="1_low_pass/assets/diagrams/inverse_chebyshev_unit_1_zero_pole_grouping.svg")/
.row.top-7mm
img(src="1_low_pass/assets/diagrams/low_pass_notch_unit_diagram.svg")/
.row.top-5mm
p.center #[strong Unit 1]
.six.wide.column
.three.wide.column
.row
img(src="1_low_pass/assets/diagrams/inverse_chebyshev_unit_2_zero_pole_grouping.svg")/
.row.top-7mm
img(src="1_low_pass/assets/diagrams/low_pass_notch_unit_diagram.svg")/
.row.top-5mm
p.center #[strong Unit 2]
.two.wide.column
//- include assets/diagrams/inverse_chebyshev_zero_pole.svg
figcaption
.reference #[span.plot-count]
.caption.
Ομαδοποίηση πόλων-μηδενικών
h4 Υλοποίηση συνάρτησης μεταφοράς
p.
Από τον αριθμό ΑΕΜ (8261) υποδειηκύεται η χρήση των κυκλωμάτων low pass notch του κεφαλαίου 7, με χρήση του κυκλώματος του σχήματος 7.23.
h5 Μονάδα 1
p Η πρώτη μονάδα low pass notch πρέπει να υλοποιεί:
figure.block-center.width-15cm
table.ui.celled.table.teal.striped.center.aligned
thead
tr
th Προδιαγραφή
th Τιμή
tbody
tr
td ω#[sub 0]
td 0.963
tr
td ω#[sub Z]
td 1.0824
tr
td ω#[sub Z]>ω#[sub 0]
td #[i.large.teal.checkmark.icon]
tr
td Q
td 0.5822
figcaption
.reference #[span.table-count]
.caption.
Προδιαγραφές πρώτης μονάδας low pass notch
p.
Γίνεται κανονικοποίηση των συχνοτήτων ως προς το ω#[sub 0], ώστε Ω#[sub 0]=1:
p.latex-equation.
$$\Omega_Z = \frac{\omega_Z}{\omega_0} = \frac{1.0824}{0.963} = 1.1239>1$$
p.
Υπολογίζονται τα στοιχεία του κυκλώματος του φίλτρου, με χρήση της μεθοδολογίας που περιγράφεται στο κεφάλαιο 7.6-B (σελίδα 35) και των εξισώσεων #[span.course-notes-equation 7-150], #[span.course-notes-equation 7-152], #[span.course-notes-equation 7-155]:
p.latex-equation.
$$C = \frac{1}{2Q} = \frac{1}{2*0.5822} = 0.8588\text{ F}$$
p.latex-equation.
$$R_2 = 4Q^2 = 4*0.5822^2 = 1.355\text{ Ohm}$$
p.latex-equation.
$$R_5 = \frac{4Q^2}{\Omega_Z^2-1} = \frac{4*0.5822^2}{1.1239^2-1} = 5.151\text{ Ohm}$$
p.latex-equation.
$$R_3 = \frac{\Omega_Z^2}{2Q^2} = \frac{1.1239^2}{2*0.5822^2} = 1.8635\text{ Ohm}$$
p.latex-equation.
$$R_1 = R_4 = 1\text{ Ohm}$$
p.
Υπολογίζεται το κέρδος της μονάδας στις υψηλές συχνότητες, χρησιμοποιώντας την εξίσωση #[span.course-notes-equation 7-143]:
p.latex-equation.
$$k_{high} = \frac{R_4}{R_3+R_4} = \frac{1}{1.8635+1} = 0.3492$$
p.
Υπολογίζεται το κέρδος της μονάδας στις χαμηλές συχνότητες, χρησιμοποιώντας τις εξισώσεις #[span.course-notes-equation 7-146], #[span.course-notes-equation 7-147] και #[span.course-notes-equation 7-148], θέτοντας s=0:
p.latex-equation.
$$k_{low} = k_{high}\Omega_Z^2 = 0.3492*1.1239^2 = 0.4411$$
p #[strong Κλιμακοποίηση]
p.
Γίνεται κλιμακωποίηση των στοιχείων της μονάδας για να μεταφερθούν οι συχνότητες στις πραγματικές τιμές. Επιλέγεται:
p.latex-equation.
$$k_{f} = \omega_s\omega_0 = 72570.79*0.963 = 69885.7$$
p.
Με βάση τον αριθμό ΑΕΜ (8261) επιλέγεται κατάλληλος συντελεστής κλιμακοποίησης πλάτους ώστε να επιτευχθεί τιμή πυκνωτών ίση με 0.1μF, γίνεται χρήση του τύπου #[span.course-notes-equation 6-33]:
p.latex-equation.
$$k_{m} = \frac{C_{old}}{k_fC_{new}} = \frac{0.8588}{69885.7*0.1*10^{-6}} = 122.88$$
p Οι τελικές τιμές των στοιχείων φαίνονται στον παρακάτω πίνακα:
figure.block-center.width-15cm
table.ui.celled.table.teal.striped.center.aligned
thead
tr
th Στοιχείο/Κέρδος
th(colspan="2") Τιμή
tbody
tr
td C
td(colspan="2") 0,1 μF
tr
td R#[sub 1]
td(colspan="2") 122,88 Ohm
tr
td R#[sub 2]
td(colspan="2") 166,59 Ohm
tr
td R#[sub 3]
td(colspan="2") 229 Ohm
tr
td R#[sub 4]
td(colspan="2") 122,88 Ohm
tr
td R#[sub 5]
td(colspan="2") 633 Ohm
tr
td Κέρδος στις υψηλές συχνότητες
td 0,3492
td -9.14 dB
tr
td Κέρδος στις χαμηλές συχνότητες
td 0,4411
td -7.1 dB
figcaption
.reference #[span.table-count]
.caption.
Τιμές των στοιχείων της πρώτης μονάδας και κέρδη στις υψηλές και χαμηλές συχνότητες
h5 Μονάδα 2
p Η δεύτερη μονάδα low pass notch πρέπει να υλοποιεί:
figure.block-center.width-15cm
table.ui.celled.table.teal.striped.center.aligned
thead
tr
th Προδιαγραφή
th Τιμή
tbody
tr
td ω#[sub 0]
td 0.7484
tr
td ω#[sub Z]
td 2.6131
tr
td ω#[sub Z]>ω#[sub 0]
td #[i.large.teal.checkmark.icon]
tr
td Q
td 1.8086
figcaption
.reference #[span.table-count]
.caption.
Προδιαγραφές δεύτερης μονάδας low pass notch
p.
Γίνεται κανονικοποίηση των συχνοτήτων ως προς το ω#[sub 0], ώστε Ω#[sub 0]=1:
p.latex-equation.
$$\Omega_Z = \frac{\omega_Z}{\omega_0} = \frac{2.6131}{0.7484} = 3.4915>1$$
p.
Υπολογίζονται τα στοιχεία του κυκλώματος του φίλτρου, με χρήση της μεθοδολογίας που περιγράφεται στο κεφάλαιο 7.6-B (σελίδα 35) και των εξισώσεων #[span.course-notes-equation 7-150], #[span.course-notes-equation 7-152], #[span.course-notes-equation 7-155]:
p.latex-equation.
$$C = \frac{1}{2Q} = \frac{1}{2*1.8086} = 0.2765\text{ F}$$
p.latex-equation.
$$R_2 = 4Q^2 = 4*1.8086^2 = 13.0838\text{ Ohm}$$
p.latex-equation.
$$R_5 = \frac{4Q^2}{\Omega_Z^2-1} = \frac{4*1.8086^2}{3.4915^2-1} = 1.1692\text{ Ohm}$$
p.latex-equation.
$$R_3 = \frac{\Omega_Z^2}{2Q^2} = \frac{3.4915^2}{2*1.8086^2} = 1.8635\text{ Ohm}$$
p.latex-equation.
$$R_1 = R_4 = 1\text{ Ohm}$$
p.
Υπολογίζεται το κέρδος της μονάδας στις υψηλές συχνότητες, χρησιμοποιώντας την εξίσωση #[span.course-notes-equation 7-143]:
p.latex-equation.
$$k_{high} = \frac{R_4}{R_3+R_4} = \frac{1}{1.8635+1} = 0.3492$$
p.
Υπολογίζεται το κέρδος της μονάδας στις χαμηλές συχνότητες, χρησιμοποιώντας τις εξισώσεις #[span.course-notes-equation 7-146], #[span.course-notes-equation 7-147] και #[span.course-notes-equation 7-148], θέτοντας s=0:
p.latex-equation.
$$k_{low} = k_{high}\Omega_Z^2 = 0.3492*3.4915^2 = 4.2573$$
p #[strong Κλιμακοποίηση]
p.
Γίνεται κλιμακωποίηση των στοιχείων της μονάδας για να μεταφερθούν οι συχνότητες στις πραγματικές τιμές. Επιλέγεται:
p.latex-equation.
$$k_{f} = \omega_s\omega_0 = 72570.79*0.7484 = 54311.9$$
p.
Με βάση τον αριθμό ΑΕΜ (8261) επιλέγεται κατάλληλος συντελεστής κλιμακοποίησης πλάτους ώστε να επιτευχθεί τιμή πυκνωτών ίση με 0.1μF, γίνεται χρήση του τύπου #[span.course-notes-equation 6-33]:
p.latex-equation.
$$k_{m} = \frac{C_{old}}{k_fC_{new}} = \frac{0.2765}{54311.9*0.1*10^{-6}} = 50.9$$
p Οι τελικές τιμές των στοιχείων φαίνονται στον παρακάτω πίνακα:
figure.block-center.width-15cm
table.ui.celled.table.teal.striped.center.aligned
thead
tr
th Στοιχείο/Κέρδος
th(colspan="2") Τιμή
tbody
tr
td C
td(colspan="2") 0,1 μF
tr
td R#[sub 1]
td(colspan="2") 50,9 Ohm
tr
td R#[sub 2]
td(colspan="2") 665,9 Ohm
tr
td R#[sub 3]
td(colspan="2") 94,8 Ohm
tr
td R#[sub 4]
td(colspan="2") 50,9 Ohm
tr
td R#[sub 5]
td(colspan="2") 59,5 Ohm
tr
td Κέρδος στις υψηλές συχνότητες
td 0,3492
td -9.14 dB
tr
td Κέρδος στις χαμηλές συχνότητες
td 4,2573
td 12.6 dB
figcaption
.reference #[span.table-count]
.caption.
Τιμές των στοιχείων της πρώτης μονάδας και κέρδη στις υψηλές και χαμηλές συχνότητες
h4 Ρύθμιση κέρδους
p.
Με βάση τον αριθμό ΑΕΜ (8261) πραγματοποιείται ρύθμιση κέρδους με στόχο την επίτευξη κέρδους 0 dB στις χαμηλές συχνότητες.
p.
Κατά την υλοποίηση των μονάδων Fried διαπιστώθηκε ότι κάθε μονάδα εισάγει μία απόσβεση. Κάτι το οποίο ήταν αναμενόμενο με βάση τη θεωρεία των μονάδω αυτών. Το συνολικό κέρδος που εισάγουν οι μονάδες είναι:
p.latex-equation.
$$k = k_{low}^1k_{low}^2 = 0.4411*4.2573 = 1.878$$
p.
Για τη ρύθμιση του κέρδους χρησιμοποιείται μία αναστρέφουσα συνδεσμολογία με κέρδος:
p.latex-equation.
$${k}' = \frac{1}{k} = \frac{1}{1.878} = 0.5324$$
p.
Επιλέγεται η χρήση αντίστασης εισόδου ίσης με r#[sub 1]=10 kOhm. Έτσι η αντίσταση ανατροφοδότησης υπολογίζεται:
p.latex-equation.
$$r_2 = r_1{k}' = 10*10^3*0.5324 = 5324\text{ Ohm}$$

156
report/1_low_pass/assets/diagrams/inverse_chebyshev_unit_1_zero_pole_grouping.svg

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faster to render big documents (not entirely sure though <i class="em
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