US 12,320,726 B2
Method and device for determining a damage state of components
Jakob Riebe, Dresden (DE); Andreas Griesing, Dresden (DE); and Sebastian Langer, Dresden (DE)
Assigned to ESTINO GMBH, Eschwege (DE)
Appl. No. 17/782,576
Filed by ESTINO GmbH, Eschwege (DE)
PCT Filed Dec. 4, 2020, PCT No. PCT/EP2020/084614
§ 371(c)(1), (2) Date Jun. 3, 2022,
PCT Pub. No. WO2021/110907, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 10 2019 218 996.2 (DE), filed on Dec. 5, 2019.
Prior Publication US 2023/0011651 A1, Jan. 12, 2023
Int. Cl. G06F 11/30 (2006.01); G01M 13/00 (2019.01); G01M 15/04 (2006.01)
CPC G01M 15/04 (2013.01) [G01M 13/00 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for determining a damage state of a component, the method being executed by a computer system comprising one or more processors, at least one memory, and a sensor system comprising one or more sensors configured to detect at least one of stresses and loads on the component during operation, the method comprising:
determining damage states for the component as a function of operating states of an overall system comprising the component, by the sensor system recording a time profile of one of the stresses and loads on the component and a time profile of signals of the overall system relevant for determining operating states during operation of the overall system,
from the recorded signals, determining at least one of the following: operating states of the overall system that have occurred and a time course of the operating states that have occurred,
determining damaging events from the at least one of the recorded stresses and loads and assigning the damaging states to the operating states,
determining at least one of stress collectives and load collectives per operating state, and determining at least one of time-normalized stress collectives and load collectives per operating state based on a duration of the respective operating state,
the one or more processors using the at least one of time-normalized stress collectives and load collectives per operating state to perform at least one of the following steps:
determining the damage state for the component as a function of operating states that have occurred in the overall system,
determining a future damage state as a function of predicted future operating states of the overall system comprising the component,
for a further component designed in the same way as the component, determining the state of damage as a function of operating states that have occurred in a further overall system comprising the further component and is designed in the same way as the overall system,
determining the future state of damage as a function of predicted operating states of the further overall system comprising the further component;
wherein damaging events are determined from at least one of the detected stresses and detected loads and assigned to the operating states and thus damaging events are determined per operating state, by carrying out at least one of a stress analysis and a load analysis;
wherein the step of carrying out at least one of a stress analysis and a load analysis comprises:
assigning at least one of each stress and each load an assigned operating state based on the signals of the overall system,
carrying out a rainflow classification of the at least one of the stresses and loads to determine the occurrence of damaging events in the form of load changes,
generating a separate rainflow matrix for each operating state in which counted load changes are distributed proportionally to the operating states involved in the occurrence of the load changes,
for a consideration of a residual, dividing the respective load change according to a type of consideration among the rainflow matrices of the operating states involved.