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Fast Large Signal Identification Professional (FLSI Pro)

Pre-Release Product

Features and Benefits

  • Automatic measurement of small and large signal speaker model parameters
  • Thermal parameter identification
  • Fast measurement time (20 sec … 3 min)
  • Finds dominant sources of distortion
  • Locates weak points in design and assembly
  • Creates accurate linear and nonlinear parameters for simulation tools
  • For electrodynamic transducers of all kinds
  • Supports drivers in free air and closed, sealed, vented, bandpass and passive radiator systems

The Fast Large Signal Identification (FLSI) software module identifies the elements of the nonlinear lumped parameter model of woofers, microspeakers, tweeters, and other electrodynamic transducers. The transducer might be mounted in a closed or ported enclosure and operates under normal working conditions. It is excited with a multi-tone signal. Starting in the small-signal domain, the amplitude is gradually increased up to the limits admissible for the particular transducer. The maximum amplitude can be determined automatically using the identified transducer parameters and general protection parameters describing the thermal and mechanical load.

The identification of the model parameters is based on the voltage u(t) and current signal i(t) measured at the electrical terminals. The identified model allows for locating the sources of the nonlinear distortion and their contribution to the radiated sound. The dynamic generation of a DC-part in the displacement, amplitude compression, and other nonlinear effects can be investigated in detail.

 

Preliminary Specification

Requirements

Software

Accessories

Internet Access

  • Parameter identification runs on a KLIPPEL server.

License Model

  • Subscription Model
  • Parameter identification happens on Klippel Server
  • Benefits
    • Always use the newest software
    • Improve support

Literatur

Patents

  • Germany: 10 2007 005 070; USA: US8,078,433B2;
  • China: ZL200810092055.4;
  • Japan: 5364271;
  • India: 162/DEL/2008;
  • Germany: 10 2012 020 271 7; 
  • USA: 10,110,995;
  • China: 201380054458.9;
  • Korea:10-2015-7012390;
  • Taiwan: 102137485;
  • India: 844/MUMNP/2015

Novel Features of the Fast LSI

  • Measure and compare many samples of a speaker model in a short time
    • As low as 20 seconds measurement time possible for small speakers
    • Automatic measurement of accurate linear and nonlinear parameters
  • Find the maximum displacement limit easier with new protection limits
    • Maximum displacement Xtarget measured by a laser
    • Rub&Buzz protection limit measured by a microphone
  • Get the full lumped parameter set in a single measurement
    • No Bl(x=0) import from the LPM into the large signal identification required any more
  • Extended model with new nonlinearities
    • Frequency-dependent inductance nonlinearity curves
    • Port nonlinearity distortion component
    • Effective surface area nonlinearity Sd(x) distortion component
    • Extended linear model (e.g., inductance, creep)
  • Comprehensive distortion component information
    • See both dominant and negligible sources of nonlinear distortion at a glance
    • Calculation of the spectral distribution of the particular distortion components
  • Fast thermal parameter identification
    • Calculate the short-term power handling

Linear Parameters

  • Measure the full lumped linear transducer parameter set with highest accuracy
  • Automatic determination of the optimum stimulus settings (level, averages)
  • Investigate parameter time-dependency by comparing them to the large signal measurement

Nonliear Dynamic Inductance

  • Inductance L(f,x) nonlinearity is frequency-dependent
  • Improve the motor design to minimize distortion and losses
  • Investigate the impact of shorting material and tune it for the target frequency band

Compare Distortion Source Contribution

  • Investigate the spectra of the nonlinear distortion of the different nonlinearities
  • Find the dominant distortion component at a glance

Thermal Parameters

  • Measure the short-term thermal parameters
  • Includes convection cooling
  • Estimate the driver‘s power handling

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