Automated Parameter Identification
and Model Validation

For the parameter identification and model validation such as an EPS control unit and motor automated procedures with statistically confirmed results are available. With that the

  • frequency response for the control reference transfer behavior
  • torque-speed characteristic for entire speed range without disturbing environmental influences,
  • precise determination of the torque ripple as well as
  • development and validation of a torque ripple compensation

can be generated. Identified parameters/ characteristics such as the moment of inertia and the viscous friction are used for the

  • control of the cutting torque
  • determination of the air gap torque

Torque-Speed Characteristic

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Identified Reference Transfer Behaviour

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Identification and Compensation of Torque Ripple

The torque ripple is precisely determined for a large number of operating points (speed and torque) across the entire speed range and even at high speeds. This allows the development and validation of compensation algorithms for the torque ripple.

Identified Torque Ripple

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Compensated Torque Ripple

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Customer Application

The DMecS power pack test benches are successfully used for the testing of customer powerpacks. These include

  • system identification regarding the torque generation dynamic
  • automated testing of motors for a torque feedback steering system
  • parameter identification for differential lock actuators and servo drives
  • reduction of torque ripple

With the reduction of the cogging torque induced torque ripple its impact on the torsion bar torque/ drivers hand torque can be positively influenced.

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