12
KCS-ID Manual
Klippel R&D System
Bl(x) offset > 25%. Use a transducer with centered voice coil offset for maximizing efficiency.
If the voice coil offset is very high compared to the peak displacement (left picture), sensitivity and
efficiency drop. For best performance it is recommended to use a transducer with a centered voice
coil (right picture).
Xmax had to be reduced. It could not be realized on both positive and negative side of the
identified Bl(x) curve.
Xmax was reduced due to exceeded IDR limit.
X
target
could not be reached because the impulsive distortion limit (
IDR Limit
) was hit at excursions
smaller than X
target
. Either the transducer cannot be used up to the specified peak excursion without
producing excessive distortion or the IDR Limit was set too conservatively.
Laser Position has changed by more than 20% of maximum measured excursion during KCS-ID
measurement.
High voice coil position change detected
).
Amplifier Gain is not sufficient to reach desired Xmax. Xmax has been reduced.
The gain of the specified target amplifier is not sufficient to drive the speaker to the X
max
determined
in the KCS-ID. X
max
was reduced.
Error Messages
High Linear Identification error/High Nonlinear Identification error
Speaker parameters could not be identified with sufficient accuracy. Check if the
Speaker Type
was
set correctly in the KCS-ID. If it was, contact
Bl(x) variation too high. Reduce limits or excitation level.
If Bl(x) decays to a value smaller than 0.25*Bl(x=0) at either positive or negative displacements,
highest accuracy of the nonlinear parameters cannot be ensured under all circumstances. In
addition, a disproportionate high peak voltage is required in KCS on-line mode for linearization.
Reduce limits in the KCS-ID or reduce the voltage manually.
Kms(x) variation too high. Reduce limits or excitation level.
If C
ms
(x)=1/K
ms
(x) decays to a value smaller than 0.25*C
ms
(x=0) at either positive or negative
displacements, highest accuracy of the nonlinear parameters cannot be ensured under all
circumstances. In addition, a disproportionate high peak voltage is required in KCS on-line mode for
linearization. Reduce limits in the KCS-ID or reduce the voltage manually.
