Method and device for controlling a test stand arrangement
AssigneeAVL List GmbH
InventorHelmut Kokal
Life of this patent
Estimating the term…
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.
Claims14
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 (TE,est) for an internal torque (TE) of the test specimen;
- determining a damping signal (TDamp) from the estimated value (TE,est) while taking into account a natural frequency (f0) 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.
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 (TE,est) for the internal torque (TE) of the test specimen, and
- a filter configured and arranged to establish a damping signal (TDamp) from the estimated value (TE,est) on the basis of a natural frequency (f0) 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.
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 (TE,est) for an internal torque (TE) of the test specimen;
- determining a damping signal (TDamp) from the estimated value (TE,est) while taking into account a natural frequency (f0) 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 (TDamp) from the estimated value (TE,est), a band range comprising the natural frequency (f0) 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.
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 (TE,est) for an internal torque (TE) of the test specimen;
- determining a damping signal (TDamp) from the estimated value (TE,est) while taking into account a natural frequency (f0) 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 (TE,est) is determined from the test specimen angular velocity (ωE) and the shaft torque (TST);
- characterized in that, when determining the damping signal (TDamp) from the estimated value (TE,est), a band range comprising the natural frequency (f0) to be damped is filtered out and the filtered signal is delayed by the delay and amplified by an amplification (Gain).
Dependencies are inferred from the claim text.