KLIPPEL ANALYZER SYSTEM Detailed Report Large Signal Identification (LSI) 

Driver Name: 8" ST4 woofer
Driver Comment: NPT110842
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%  >4.5  mm  Displacement limit due to force factor variation 
X C @ C min=75%  3.0  mm  Displacement limit due to compliance variation 
X L @ Z max=10 %  >4.5  mm  Displacement limit due to inductance variation 
X d @ d2=10%  35.9  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)  9.5923  N/A  constant part in force factor 
Bl1  0.052407  N/Amm  1st order coefficient in force factor expansion 
Bl2  0.020184  N/Amm^2  2nd order coefficient in force factor expansion 
Bl3  0.00077145  N/Amm^3  3rd order coefficient in force factor expansion 
Bl4  0.0010103  N/Amm^4  4th order coefficient in force factor expansion 
Bl5  1.6213e005  N/Amm^5  5th order coefficient in force factor expansion 
Bl6  4.8807e006  N/Amm^6  6th order coefficient in force factor expansion 
Bl7  2.6735e008  N/Amm^7  7th order coefficient in force factor expansion 
Bl8  6.5156e008  N/Amm^8  8th order coefficient in force factor expansion 
L0 = Le (X=0)  1.0652  mH  constant part in inductance 
L1  0.081732  mH/mm  1st order coefficient in inductance expansion 
L2  0.0014840  mH/mm^2  2nd order coefficient in inductance expansion 
L3  0.0023271  mH/mm^3  3rd order coefficient in inductance expansion 
L4  0.00015502  mH/mm^4  4th order coefficient in inductance expansion 
L5  0.00013408  mH/mm^5  5th order coefficient in inductance expansion 
L6  1.3892e005  mH/mm^6  6th order coefficient in inductance expansion 
L7  3.3591e006  mH/mm^7  7th order coefficient in inductance expansion 
L8  4.3324e007  mH/mm^8  8th order coefficient in inductance expansion 
C0 = Cms (X=0)  1.2249  mm/N  constant part in compliance 
C1  0.079281  1/N  1st order coefficient in compliance expansion 
C2  0.014593  1/Nmm  2nd order coefficient in compliance expansion 
C3  0.0031226  1/Nmm^2  3rd order coefficient in compliance expansion 
C4  0.00013663  1/Nmm^3  4th order coefficient in compliance expansion 
C5  4.8757e005  1/Nmm^4  5th order coefficient in compliance expansion 
C6  8.2817e006  1/Nmm^5  6th order coefficient in compliance expansion 
C7  2.5614e007  1/Nmm^6  7th order coefficient in compliance expansion 
C8  1.1670e007  1/Nmm^7  8th order coefficient in compliance expansion 
Xpse  4.5  mm  Xpse < X < Xpse, range where power series is fitted 
Symbol  Large + Warm  Large + Cold  Small Signal  Unit  Comment 

Delta Tv = TvTa  13  0  0  K  increase of voice coil temperature during the measurement 
Xprot  6.5  6.5  1.3  mm  maximal voice coil excursion (limited by protection system) 
Re (Tv)  5.94  5.67  5.67  Ohm  voice coil resistance considering increase of voice coil temperature Tv 
Le (X=0)  1.07  1.07  0.90  mH  voice coil inductance at the rest position of the voice coil 
L2 (X=0)  0.55  0.55  0.47  mH  parainductance at the rest position due to the effect of eddy current 
R2 (X=0)  4.52  4.52  3.80  Ohm  resistance at the rest position due to eddy currents 
Cmes (X=0)  371  371  380  �F  electrical capacitance representing moving mass 
Lces (X=0)  107.50  107.50  71.90  mH  electrical inductance at the rest position representing driver compliance 
Res (X=0)  33.42  33.42  22.86  Ohm  resistance at the rest position due to mechanical losses 
Qms (X=0, Tv)  1.96  1.96  1.66  mechanical Qfactor considering Rms only  
Qes (Tv)  0.33  0.32  0.41  electrical Qfactor considering Re (Tv) only  
Qts (X=0, Tv)  0.28  0.27  0.33  total Qfactor considering Re (Tv) and Rms only  
fs  25.2  25.2  30.5  Hz  driver resonance frequency 
Mms  32.541  32.541  g  mechanical mass of driver diaphragm assembly including voicecoil and air load  
Rms (X=0)  2.626  2.626  kg/s  mechanical resistance of totaldriver losses  
Cms (X=0)  1.22  1.22  0.90  mm/N  mechanical compliance of driver suspension at the rest position 
Bl (X=0)  9.59  9.59  N/A  force factor at the rest position (Bl product)  
Vas  93.2411  93.2411  68.5805  l  equivalent air volume of suspension 
N0  0.430  0.451  0.451  %  reference efficiency (2Pisr radiation using Re) 
Lm  88.5  88.7  88.7  dB  characteristic sound pressure level 
Sd  232.35  232.35  232.35  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  20070510  
Time  14:00:45  
Serial number  0  
Mode  Nonlinear Mode 5(7)  
Record  214/214  
Laser  signal reliable  
t  00:12:16  h:min:s  measurement time 
Ei (t)  6.6  %  error current measurement 
Ex (t)  4.3  %  error laser measurement 
Eu (t)  5.9  %  error amplifier check 
Delta Tv (Delta Tlim)  12.7 (60.0)  K  increase of voice coil temperature (limit) 
Blmin (Bllim)  75.8 (50.0)  %  minimal force factor ratio (limit) 
Cmin (Clim)  49.7 (50.0)  %  minimal compliance ratio (limit) 
P (Plim)  3.09 (50.00)  W  real electrical input power (limit) 
Lmin  64.1  %  minimal inductance ratio 
Pn  3.73  W  nominal electrical input power 
P Re  2.56  W  Power heating voice coil 
P con  W  deducted power due to convection cooling  
Glarge (Gmax)  15.7 (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  0.1  mm  dc component of voice coil excursion measured in the last update intervall 
Xpeak  5.5  mm  positive peak value of voice coil excursion measured in the last update intervall 
Xbottom  6.4  mm  negative peak value (bottom) of voice coil excursion measured in the last update intervall 
Xp+  4.5  mm  upper limit of displacement range (99% probability) 
Xp  5.0  mm  lower limit of displacement range (99% probability) 
Xprot  6.5  mm  maximal voice coil excursion allowed by protection system 
v rms  0.27  m/s  voice coil velocity 
Irms  0.656  A  rms value of the electrical input current 
Urms  5.460  V  rms value of the electrical voltage at the transducer terminals 
Ipeak  2.436  A  peak value of the electrical input current 
Upeak  19.281  V  peak value of the electrical voltage at the transducer terminals 
PC  0.41  dB  thermal power compression factor 
Db  9.4  %  distortion factors representing contribution of nonlinear force factor 
Dl  6.5  %  distortion factor representing contribution of nonlinear inductance 
Dc  11.6  %  distortion factor representing contribution of nonlinear compliance 
R tc (v)  K/W  
R th total  4.98  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: 
15:58:40


Username: 
lab1

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