File:Minimum and maximum phase responses.gif
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Minimum_and_maximum_phase_responses.gif (450 × 450 pixels, file size: 573 KB, MIME type: image/gif, looped, 55 frames, 2.8 s)
File information
Structured data
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]DescriptionMinimum and maximum phase responses.gif |
English: Shows the phase responses of a minimum and maximum phase responses when |
Date | |
Source | Own work |
Author | fdeloche |
Licensing
[edit]I, the copyright holder of this work, hereby publish it under the following license:
![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
![share alike](https://upload.wikimedia.org/wikipedia/commons/thumb/d/df/Cc-sa_white.svg/24px-Cc-sa_white.svg.png)
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Generation code
[edit]Minimumphase.py # coding: utf-8 '''Generate an animation showing the phase response for a minimum and maximum phase system''' __author__ = "fdeloche" # In[1]: get_ipython().magic(u'matplotlib inline') import sys import numpy as np import matplotlib.pyplot as pl from matplotlib.animation import FuncAnimation # In[2]: createGif=True pl.rc('xtick', labelsize=20) pl.rc('ytick', labelsize=20) pl.rc('font', weight='bold') # In[3]: fig, ((ax1, ax2), (ax3, ax4)) = pl.subplots(2, 2, figsize=(15, 15)) #fig.set_tight_layout(True) a_x = 0.8 a_y=0. m=1000 A = a_x + 1j*a_y a_mod = np.abs(A) Ainv = 1./A a_xbis = np.real(Ainv) a_ybis = -np.imag(Ainv) # r^2 = x_lim_a = -0.3 x_lim_b = 1.9 y_lim = 1.1 t = np.linspace(0, 1, num=m) ax1.scatter(0, 0, linewidth=6, color='blue') ax1.scatter(1, 0, linewidth=4, color='blue') ax1.set_xlim([x_lim_a, x_lim_b]) ax1.set_ylim([-y_lim, y_lim]) ax1.set_title('$1-az^{-1}$', fontsize=35) ax1.plot(t, np.zeros(m), color='blue', linewidth=4) ax1.plot(1+a_mod*np.cos(2*np.pi*t), a_mod*np.sin(2*np.pi*t), color='black') ax1.axis('off') ax1.text(-0.2, 0.1, "$(0, 0)$", fontsize=30, color='blue') ax1.text(1-0.1, 0.1, "$(1, 0)$", fontsize=30, color='blue') ax3.set_title('$\overline{a}(1-\overline{a}^{\ -1}z^{-1})$', fontsize=35) ax3.scatter(0, 0, linewidth=6, color='blue') ax3.scatter(np.abs(A), 0, linewidth=4, color='blue') ax3.set_xlim([x_lim_a, x_lim_b]) ax3.set_ylim([-y_lim, y_lim]) ax3.plot(t*np.abs(A), np.zeros(m), color='blue', linewidth=4) ax3.plot(np.abs(A)+np.cos(2*np.pi*t), np.sin(2*np.pi*t), color='black') ax3.axis('off') ax3.text(-0.1, 0.1, "$(0, 0)$", fontsize=30, color='blue') ax3.text(-0.1+np.abs(A), 0.1, "$(\overline{a}, 0)$", fontsize=30, color='blue') Z = np.cos(2*np.pi*t) - 1j*np.sin(2*np.pi*t) G = np.angle(1-A*Z) ax2.set_title('Phase response', fontsize=25) ax2.plot(2*np.pi*t, G, color='blue', linewidth=2) ax2.plot(2*np.pi*t, 0*t, color='black') G2 = np.angle(1-np.conj(Ainv)*Z) #ax4.set_title('Phase response', fontsize=25) ax4.plot(2*np.pi*t, G2, color='blue', linewidth=2) ax4.plot(2*np.pi*t, 0*t, color='black') ax2.set_ylim([-np.pi, np.pi]) ax4.set_ylim([-np.pi, np.pi]) ax2.set_xlim([0, 6.283]) ax4.set_xlim([0, 6.283]) ''' ax2.spines["top"].set_visible(False) ax2.spines["right"].set_visible(False) ax4.spines["top"].set_visible(False) ax4.spines["right"].set_visible(False) ''' # In[4]: line1, = ax1.plot(1-np.abs(A)*t*1, t*0, color='blue', linewidth=4) line2, = ax3.plot(np.abs(A)-t*1, t*0, color='blue', linewidth=4) line3, = ax1.plot((1-np.abs(A))*t*1, t*0, color='red', linewidth=4) line4, = ax3.plot((np.abs(A)-1)*t, t*0, color='red', linewidth=4) point1 = ax1.scatter(1-np.abs(A), 0, linewidth=5, color='red') point2 = ax3.scatter(np.abs(A)-1, 0, linewidth=5, color='red') line5, = ax2.plot(0*t, G[0]*t, color='red', linewidth=4) line6, = ax4.plot(0*t, G2[0]*t, color='red', linewidth=4) point3 = ax2.scatter(0, G[0], color='red', linewidth=5) point4 = ax4.scatter(0, G2[0], color='red', linewidth=5) # In[5]: n_frames = 55 def update(i): t0 = i*1./n_frames B = [a_mod*np.cos(2*np.pi*t0), -a_mod*np.sin(2*np.pi*t0)] line1.set_xdata(1-t*B[0]) line1.set_ydata(-t*B[1]) C = [np.cos(2*np.pi*t0), -np.sin(2*np.pi*t0)] line2.set_xdata(np.abs(A)-t*C[0]) line2.set_ydata(-t*C[1]) line3.set_xdata((1-B[0])*t) line3.set_ydata(-t*B[1]) line4.set_xdata((np.abs(A)-C[0])*t) line4.set_ydata(-t*C[1]) point1.set_offsets((1-B[0], -B[1])) point2.set_offsets((np.abs(A)-C[0], -C[1])) line5.set_xdata(2*np.pi*t0+0*t) line6.set_xdata(2*np.pi*t0+0*t) Z0 = np.cos(2*np.pi*t0) - 1j*np.sin(2*np.pi*t0) G0 = np.angle(1-A*Z0) G20 = np.angle(1-np.conj(Ainv)*Z0) line5.set_ydata(G0*t) line6.set_ydata(G20*t) point3.set_offsets((2*np.pi*t0, G0)) point4.set_offsets((2*np.pi*t0, G20)) return line1, line2, line3, line4, point1, point2, line5, line6, point3, point4 # In[ ]: anim = FuncAnimation(fig, update, frames=np.arange(0,n_frames), interval=50, blit=True) if(createGif): anim.save('result.gif', dpi=30, writer='imagemagick') else: pl.show() # In[ ]:
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 09:35, 21 September 2016 | ![]() | 450 × 450 (573 KB) | Ixnay (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on ca.wikipedia.org
- Usage on en.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on zh.wikipedia.org