Method for reducing vibrations in a test bed

Patent metadata

Field	Value
Publication number	US-10317312-B2
Application number	US-201414895380-A
Country	US
Kind code	B2
Filing date	May 30, 2014
Priority date	Jun 3, 2013
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

In order to reduce the excitation of vibrations and resonances in a test bed for a real component and a virtual component, one of the following method steps is provided: a) determining a first correction value (K1) from the measured variable (M), wherein the first correction value (K1) is added to the measured variable (M) and the sum is communicated as a corrected measured variable (M*) to the virtual component for calculating the control variable (S), b) determining a second correction value (K2) from the calculated control variable (S), wherein the second correction value (K2) is added to the calculated control variable (S) and the sum is transferred as a corrected control variable (S*) to the actuator, c) determining a third correction value (K3) from the measured variable (M), wherein the third correction value (K3) is used to modify a parameter (P) of the equation of movement.

First claim

What is claimed is:

1. A method for reducing the excitation of vibrations and resonances in a test bed for a real component and a virtual component, wherein the real component provides a measured variable (M) of the real component to the virtual component and receives a control variable (S) for an actuator of the test bed from the virtual component, wherein a simulation model with an equation of motion is implemented in the virtual component, which calculates the control variable (S) from the measured variable (M) and the actuator adjusts the calculated control variable (S) on the test bed, wherein at least one of the following method steps a), b) or c) is set:
a) determining a first correction value (K 1 ) from the measured variable (M), wherein the first correction value (K 1 ) is added to the measured variable (M) and the sum is transferred as a corrected measured variable (M*) to the virtual component for calculating the control variable (S),
b) determining a second correction value (K 2 ) from the calculated control variable (S), wherein the second correction value (K 2 ) is added to the calculated control variable (S) and the sum is transferred as a corrected control variable (S*) to the actuator,
c) determining a third correction value (K 3 ) from the measured variable (M), wherein the third correction value (K 3 ) is used to modify a parameter (P) of the equation of motion and that for determining the first or the second or the third correction value (K 1 , K 2 , K 3 ), a target function (J) is implemented as a function of the first or the second or the third correction value (K 1 , K 2 , K 3 ), which is optimized with regard to the first or the second or the third correction value (K 1 , K 2 , K 3 ).

2. The method as claimed in claim 1 , wherein the measured variable (M), and rotary torque (T W ) of a connection shaft between the real component and the actuator is used.

3. The method as claimed in claim 1 , wherein a rotary speed (n) is used as the control variable (S).

4. The method as claimed in claim 1 , wherein for determining the first or the third correction value (K 1 , K 3 ), a linear combination of a first and a second target function (J energy , J disto ) is used as the target function (J).

5. The method as claimed in claim 4 , wherein as the first target function (J energy ), a square objective function is used as a function of angular speed (ω) or a derivative thereof.

6. The method as claimed in claim 4 , wherein the second target function (J disto ) is used to evaluate angular momentum additionally introduced by the first correction value (K 1 ).

7. The method as claimed in claim 4 , wherein the second target function (J disto ) is used to evaluate kinetic energy modified by the third correction value (K 3 ).

8. The method as claimed in claim 1 , wherein a correction torque (T cor ) is determined as the first correction value (K 1 ).

9. The method as claimed in claim 1 , wherein a correction inertia moment (J cor ) is determined as the third correction value (K 3 ).

10. The method as claimed in claim 1 , wherein for determining the second correction value (K 2 ), a target function (J) is implemented which evaluates the deviation between the control variable (S) calculated in the virtual component and a control variable actual value (S act ).

11. The method as claimed in claim 10 , wherein a correction rotary speed (n cor ) is calculated as the second correction value (K 2 ) by optimising the correction rotary speed (n cor ) with respect a rotary speed calculated in the virtual component (n dmd,sim ), and a determined rotary speed (n act ).

12. The method as claimed in claim 1 , wherein during the optimization, boundary conditions are used for taking into account specified limitations of the virtual component or of the real component or of the actuator.

13. The method as claimed in claim 5 , wherein the first target function is

J
energy

=

1
2

⁢

J
W

⁢

∫

τ
=
t

t
+
T

⁢



ω
¨

⁡

(
τ
)



2
2

⁢

⁢
d
⁢

⁢
τ

or

J
energy

=

1
2

⁢

J
W

⁢

∫

τ
=
t

t
+
T

⁢



ω
.

⁡

(
τ
)



2
2

⁢

⁢
d
⁢

⁢

τ
.

14. The method as claimed in claim 6 , wherein the second target function is

J
disto

=

∫

v
=

Assignees

• Avl List Gmbh

Inventors

• Pfister Felix
• Jakubek Stefan
• Fleck Andreas

Classifications

• G01M7/022 Primary

  Vibration control arrangements, e.g. for generating random vibrations · CPC title

• G01M7/02

  Vibration-testing {by means of a shake table} · CPC title

• G01M13/02

  Gearings; Transmission mechanisms · CPC title

• G01M15/00 Primary

  Testing of engines · CPC title

• G01M17/00

  Testing of vehicles (testing fluid tightness G01M3/00; testing elastic properties of bodies or chassis, e.g. torsion-testing, G01M5/00; testing alignment of vehicle headlight devices G01M11/06; testing of engines G01M15/00) · CPC title