Method and device for controlling a test stand arrangement

Patent metadata

Field	Value
Publication number	US-11255749-B2
Application number	US-201716464107-A
Country	US
Kind code	B2
Filing date	Nov 24, 2017
Priority date	Nov 28, 2016
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

The invention relates to a device and to a method for controlling a test stand arrangement having a specimen and having a loading machine, which is connected to the specimen by a connecting shaft. An estimated value (TE,est) for for the internal torque (TE) of the specimen is determined and, from the estimated value (TE,est), while taking into account a natural frequency (f0) and a delay, a damping signal (TDamp) is determined and fed back into the control loop.

First claim

The invention claimed is:

1. A method for controlling a test stand arrangement including a test specimen and a loading machine which is connected to the test specimen by a connecting shaft the test stand arrangement corresponding to a supercritical arrangement, the method including the following steps:
determining an estimated value (T E,est ) for an internal torque (T E ) of the test specimen;
determining a damping signal (T Damp ) from the estimated value (T E,est ) while taking into account a natural frequency (f 0 ) of the test stand arrangement that is to be damped and a delay; and
feeding the damping signal back into a control loop for controlling the test stand arrangement.

2. The method according to claim 1 , characterized in that the estimated value (T E,est ) is determined from the test specimen angular velocity (ω E ) and the shaft torque (T ST ).

3. The method according to claim 1 , characterized in that, when determining the damping signal (T Damp ) from the estimated value (T E,est ), a band range comprising the natural frequency (f 0 ) to be damped is filtered out and the filtered signal is delayed by the delay and amplified by an amplification (Gain).

4. The method according to claim 1 , characterized in that the delay is a constant parameter.

5. A device for controlling a test stand arrangement, the device comprising:
a test specimen;
a loading machine which is connected to the test specimen by a connecting shaft;
the test stand arrangement ( 4 ) corresponding to a supercritical arrangement,
a damping unit including
an estimating unit configured and arranged to establish an estimated value (T E,est ) for the internal torque (T E ) of the test specimen, and
a filter configured and arranged to establish a damping signal (T Damp ) from the estimated value (T E,est ) on the basis of a natural frequency (f 0 ) of the test stand arrangement that is to be damped and a delay and feeding said damping signal back into a control loop of the test stand arrangement.

6. The device of claim 5 , characterized in that the estimating unit is further configured and arranged to determine the estimated value (T E,est ) from a test specimen angular velocity (ω E ) and a shaft torque (T ST ).

7. The device of claim 6 , wherein the estimating unit is configured and arranged to utilize a Kalman filter.

8. The device of claim 6 , wherein the filter includes a delay element configured and arranged to operate as a FIFO memory for the device.

9. The device of claim 5 , characterized in that the estimating unit is configured and arranged to utilize a Kalman filter.

10. The device of claim 9 , wherein the filter includes a delay element configured and arranged to operate as a FIFO memory for the device.

11. The device of claim 5 , characterized in that the filter includes a delay element configured and arranged to operate as a FIFO memory, facilitates parameterization and allows a constant parameter to be used for the delay.

12. A method for controlling a test stand arrangement including a test specimen and a loading machine which is connected to the test specimen by a connecting shaft—the test stand arrangement corresponding to a supercritical arrangement, the method including the following steps:
determining an estimated value (T E,est ) for an internal torque (T E ) of the test specimen;
determining a damping signal (T Damp ) from the estimated value (T E,est ) while taking into account a natural frequency (f 0 ) of the test stand arrangement that is to be damped and a delay; and
feeding the damping signal back into a control loop for controlling the test stand arrangement;
characterized in that, when determining the damping signal (T Damp ) from the estimated value (T E,est ), a band range comprising the natural frequency (f 0 ) to be damped is filtered out and the filtered signal is delayed by the delay and amplified by an amplification (Gain);
characterized in that one or more of the following parameters are determined in advance of a simulation on the test stand arrangement: the delay, the amplification (Gain), and the band range.

13. The method of claim 12 , characterized in that the delay (Delay) is a constant parameter.

14. A method for controlling a test stand arrangement including a test specimen and a loading machine which is connected to the test specimen by a connecting shaft—the test stand arrangement corresponding to a supercritical arrangement, the method including the following steps:
determining an estimated value (T E,est ) for an internal torque (T E ) of the test specimen;
determining a damping signal (T Damp ) from the estimated value (T E,est ) while taking into account a natural frequency (f 0 ) of the test stand arrangement that is to be damped and a delay; and
feeding the damping signal back into a control loop for controlling the test stand arrangement;
characterized in that the estimated value (T E,est ) is determined from the test specimen angular velocity (ω E ) and the shaft torque (T ST );
characterized in that, when determining the damping signal (T Damp ) from the estimated value (T E,est ), a band range comprising the natural frequency (f 0 ) to be damped is filtered out and the filtered signal is delayed by the delay and amplified by an amplification (Gain).

Assignees

• Avl List Gmbh

Inventors

• Kokal Helmut

Classifications

• G06F5/06

  for changing the speed of data flow, i.e. speed regularising {or timing, e.g. delay lines, FIFO buffers; over- or underrun control therefor (G06F7/78 takes precedence)} · CPC title

• B60W2030/206

  related or induced by the engine · CPC title

• H03H21/003

  KALMAN filters · CPC title

• G01L3/22

  electrically or magnetically actuated · CPC title

• B60W2710/083

  Torque · CPC title