KLIPPEL ANALYZER SYSTEM Detailed Report Large Signal Identification (LSI) 

Driver Name: 10" Foster woofer
Driver Comment: 110751
Measurement: LSI large signal 1.0
Measurement Comment:
Symbol  Number  Unit  Comment 

Displacement Limits  thresholds can be changed in Processing property page  
X Bl @ Bl min=82%  >9.7  mm  Displacement limit due to force factor variation 
X C @ C min=75%  2.6  mm  Displacement limit due to compliance variation 
X L @ Z max=10 %  2.5  mm  Displacement limit due to inductance variation 
X d @ d2=10%  61.2  mm  Displacement limit due to IM distortion (Doppler) 
f0  N/A^2  flux modulation f0  
f1  N/(A^2m)  flux modulation f1  
Bl0 = Bl (X=0)  17.150  N/A  constant part in force factor 
Bl1  0.10076  N/Amm  1st order coefficient in force factor expansion 
Bl2  0.0056046  N/Amm^2  2nd order coefficient in force factor expansion 
Bl3  0.0018422  N/Amm^3  3rd order coefficient in force factor expansion 
Bl4  0.00013030  N/Amm^4  4th order coefficient in force factor expansion 
Bl5  3.9425e007  N/Amm^5  5th order coefficient in force factor expansion 
Bl6  2.9394e007  N/Amm^6  6th order coefficient in force factor expansion 
Bl7  1.7691e008  N/Amm^7  7th order coefficient in force factor expansion 
Bl8  2.6676e010  N/Amm^8  8th order coefficient in force factor expansion 
L0 = Le (X=0)  8.6754  mH  constant part in inductance 
L1  0.56821  mH/mm  1st order coefficient in inductance expansion 
L2  0.0013402  mH/mm^2  2nd order coefficient in inductance expansion 
L3  0.0059213  mH/mm^3  3rd order coefficient in inductance expansion 
L4  0.00013473  mH/mm^4  4th order coefficient in inductance expansion 
L5  7.8853e005  mH/mm^5  5th order coefficient in inductance expansion 
L6  3.2477e006  mH/mm^6  6th order coefficient in inductance expansion 
L7  4.2826e007  mH/mm^7  7th order coefficient in inductance expansion 
L8  2.3253e008  mH/mm^8  8th order coefficient in inductance expansion 
C0 = Cms (X=0)  0.76156  mm/N  constant part in compliance 
C1  0.079911  1/N  1st order coefficient in compliance expansion 
C2  0.0013264  1/Nmm  2nd order coefficient in compliance expansion 
C3  0.0019237  1/Nmm^2  3rd order coefficient in compliance expansion 
C4  0.00018019  1/Nmm^3  4th order coefficient in compliance expansion 
C5  1.7674e005  1/Nmm^4  5th order coefficient in compliance expansion 
C6  2.6685e006  1/Nmm^5  6th order coefficient in compliance expansion 
C7  6.1493e008  1/Nmm^6  7th order coefficient in compliance expansion 
C8  1.1914e008  1/Nmm^7  8th order coefficient in compliance expansion 
Xpse  9.7  mm  Xpse < X < Xpse, range where power series is fitted 
Symbol  Large + Warm  Large + Cold  Small Signal  Unit  Comment 

Delta Tv = TvTa  55  0  0  K  increase of voice coil temperature during the measurement 
Xprot  14.5  14.5  1.5  mm  maximal voice coil excursion (limited by protection system) 
Re (Tv)  11.35  9.38  9.38  Ohm  voice coil resistance considering increase of voice coil temperature Tv 
Le (X=0)  8.67  8.67  5.34  mH  voice coil inductance at the rest position of the voice coil 
L2 (X=0)  1.65  1.65  1.02  mH  parainductance at the rest position due to the effect of eddy current 
R2 (X=0)  21.98  21.98  13.54  Ohm  resistance at the rest position due to eddy currents 
Cmes (X=0)  626  626  611  �F  electrical capacitance representing moving mass 
Lces (X=0)  184.80  184.80  91.43  mH  electrical inductance at the rest position representing driver compliance 
Res (X=0)  146.01  146.01  66.63  Ohm  resistance at the rest position due to mechanical losses 
Qms (X=0, Tv)  8.50  8.50  5.45  mechanical Qfactor considering Rms only  
Qes (Tv)  0.55  0.45  0.77  electrical Qfactor considering Re (Tv) only  
Qts (X=0, Tv)  0.51  0.43  0.67  total Qfactor considering Re (Tv) and Rms only  
fs  14.8  14.8  21.3  Hz  driver resonance frequency 
Mms  152.099  152.099  g  mechanical mass of driver diaphragm assembly including voicecoil and air load  
Rms (X=0)  1.664  1.664  kg/s  mechanical resistance of totaldriver losses  
Cms (X=0)  0.76  0.76  0.53  mm/N  mechanical compliance of driver suspension at the rest position 
Bl (X=0)  17.15  17.15  N/A  force factor at the rest position (Bl product)  
Vas  141.3205  141.3205  97.8975  l  equivalent air volume of suspension 
N0  0.080  0.097  0.118  %  reference efficiency (2Pisr radiation using Re) 
Lm  81.2  82.0  82.9  dB  characteristic sound pressure level 
Sd  363.05  363.05  363.05  cm�  diaphragm area 
Temporal Variations of the Stiffness K_{MS}(t, x=0)
Temporal Variations of the Voice Coil Resistance R_{E}(t)
Symbol  Value  Unit  Comment 

Date  20070530  
Time  12:56:19  
Serial number  0  
Mode  Nonlinear Mode 5(7)  
Record  207/207  
Laser  signal reliable  
t  00:12:02  h:min:s  measurement time 
Ei (t)  20.2  %  error current measurement 
Ex (t)  6.6  %  error laser measurement 
Eu (t)  9.3  %  error amplifier check 
Delta Tv (Delta Tlim)  55.3 (60.0)  K  increase of voice coil temperature (limit) 
Blmin (Bllim)  65.2 (50.0)  %  minimal force factor ratio (limit) 
Cmin (Clim)  20.3 (20.0)  %  minimal compliance ratio (limit) 
P (Plim)  21.83 (50.00)  W  real electrical input power (limit) 
Lmin  49.8  %  minimal inductance ratio 
Pn  54.01  W  nominal electrical input power 
P Re  17.07  W  Power heating voice coil 
P con  W  deducted power due to convection cooling  
Glarge (Gmax)  21.0 (26.0)  dB  gain of the excitation amplitude increased in the large signal domain (maximum) 
Mech. system  abs.  laser used to identify mechanical system in absolute quantities  
Xdc  0.7  mm  dc component of voice coil excursion measured in the last update intervall 
Xpeak  13.1  mm  positive peak value of voice coil excursion measured in the last update intervall 
Xbottom  10.0  mm  negative peak value (bottom) of voice coil excursion measured in the last update intervall 
Xp+  11.1  mm  upper limit of displacement range (99% probability) 
Xp  9.7  mm  lower limit of displacement range (99% probability) 
Xprot  14.5  mm  maximal voice coil excursion allowed by protection system 
v rms  0.48  m/s  voice coil velocity 
Irms  1.226  A  rms value of the electrical input current 
Urms  20.786  V  rms value of the electrical voltage at the transducer terminals 
Ipeak  4.572  A  peak value of the electrical input current 
Upeak  78.632  V  peak value of the electrical voltage at the transducer terminals 
PC  1.66  dB  thermal power compression factor 
Db  8.7  %  distortion factors representing contribution of nonlinear force factor 
Dl  16.0  %  distortion factor representing contribution of nonlinear inductance 
Dc  40.8  %  distortion factor representing contribution of nonlinear compliance 
R tc (v)  K/W  
R th total  3.24  K/W  Delta Tv / P Re 
Voltage u_{peak}(t) and Current i_{peak}(t)
Voice Coil Temperature D T_{V}(t) and Power P(t)
Displacement Probability Density Function pdf(x)
Report generated:  

Date: 
05/30/07


Time: 
15:52:05


Username: 
lab1

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