DMecS Test Benches
The highly dynamical controlled power pack test benches developed by DMecS are available to our customers as customized turn-key solutions while the company's own power pack test benches are successfully used in customer projects for testing of the respective power units. The developed HiL-simulator for steering systems with torque feedback steering wheel is also available for customer projects. Further information about the Power Pack test benches can be found in the PPTB-flyer.
Power Pack Test Benches (PPTB)
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The highly dynamic test benches allow for realistic HiL-tests of powerpacks as well as the parameter identification and model validation of the device under test with
- mechanical and electrical parameters
- torque-speed characteristic
- reference transfer behavior of the control
- torque ripple
The test bench provides
- innovative and high-performance control concept as
well as highly dynamic actuators and sensors - modular and flexible design of the setup, the control
and the dSPACE system - individual testing sequences and HiL-models
The components to be tested and therefore the results remain uninfluenced by the test bench dynamics. An overview is given by PPTB Overview Presentation.
HiL-Tests
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The realistic results of the highly dynamic test, for example
for an EPS control unit and motor, are ensured by
- sophisticated models of steering system/ vehicle dynamic
- realistic parameter sets for every model
- highly dynamic torque control for actuator
The HiL- tests are characterized by
- universal application even for the production of EPS ECUs/ motors
- high performance, proven by standardized road tests with highly dynamic excitation
Parameter Identification
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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
- the precise determination of the torque ripple
- the 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
Customer Applications
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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.
Torque Feedback Steering Wheel
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The HiL-simulator for steering systems and the torque feedback steering wheel (TFS) developed by DMecS allows for
- providing of the steering feel for haptic experiences
- HiL- tests in the conceptional development phase
- pre-adjustment of control algorithms before the testing in a vehicle
- application of the TFS as a steering angle sensor
The automated initialization/ parameter identification and the modular structure ensure the comfortable handling as well as the applicability with a wide variety of software environments.