EP4612472A1 - Hybrides prüfverfahren, insbesondere für einen antriebsstrang von windenergieanlagen - Google Patents
Hybrides prüfverfahren, insbesondere für einen antriebsstrang von windenergieanlagenInfo
- Publication number
- EP4612472A1 EP4612472A1 EP23798793.8A EP23798793A EP4612472A1 EP 4612472 A1 EP4612472 A1 EP 4612472A1 EP 23798793 A EP23798793 A EP 23798793A EP 4612472 A1 EP4612472 A1 EP 4612472A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- test
- load
- test object
- bench
- results
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Definitions
- the present disclosure relates to a test method for determining a behavior of a test object, in particular a drive train of wind turbines.
- test benches for mechanical drive systems are increasing with increasing sizes of test objects.
- Many existing test benches for drive trains are already too small and/or too low-performance for the testing requirements of modern wind turbines.
- test benches for example for testing a wind turbine nacelle or a wind turbine drive train.
- the implementation of ever larger test benches is associated with disproportionately increasing costs and effort.
- the widely used validation approach in the context of product development according to the V model i.e. validation at various development stages during product development, is difficult to implement at the level of the "drive train" system, since many existing test facilities do not offer the required test capacity for the entire, specified working range (idle, partial load, full load, overload) for current and future drive train prototypes.
- the present invention is therefore based on the object of proposing an alternative testing method. This object is achieved by a testing method according to claim 1.
- Advantageous further developments of the method are set out in the dependent claims and the following description. Exemplary embodiments of the method according to the invention are explained in more detail in the description of the figures.
- the proposed hybrid test procedure is used to determine the behavior of a test object, in particular a drive train of wind turbines, under predefined loads.
- the test procedure comprises the following steps
- test bench with a test object to be tested, the test bench having a maximum load that can be applied to the test object by the test bench, a full load being predefined for the test object, the full load of the test object being greater than the maximum load that can be applied to the test bench, II.
- V Simulate a load test of the test object under full load and/or overload in the validated simulation model.
- the maximum load that can be applied to the test object by the test bench can therefore be lower than the full load of the test object.
- a test bench that is significantly smaller than a test bench that could apply the full load of the test object to the test object can be used to test the test object.
- the investment costs for such a test bench can be significantly lower than for a test bench that could represent a full load of the test object.
- full load can be understood as a maximum load specified by the manufacturer. Full load can therefore be the maximum load for which the test object was designed. For a machine, full load can correspond to the state of maximum performance. Overload can be understood as a load above full load.
- a load range can be simulated in particular.
- a lower limit of the load range can in particular be greater than or equal to the maximum load that can be applied to the test object by the test bench.
- An upper limit of the load range can be less than or equal to the full load of the test object and/or less than or equal to a defined overload of the test object.
- a simulation of the load range can consist of repetitions of sequential and/or simultaneous simulations of individual load cases in the corresponding load range. Performing mechanical tests at partial loads can result in lower energy requirements and/or a smaller number of tests to be performed in real life compared to testing on a test bench with higher performance. Both can lead to lower testing costs.
- test bench infrastructure there may be no need to invest in larger or more powerful test bench infrastructure as soon as the first test requirements exceed the existing test bench capacities.
- Existing smaller test benches can still be used to test a test object with higher operating performance or load requirements.
- the operators of the existing test benches usually have validated simulation models of the test benches that are based on data from several test campaigns.
- the existing test benches can generally be expected to be more reliable (numerous errors have already been corrected) and to operate more efficiently than newly commissioned test benches.
- the proposed method can be used to generate a validated simulation model that can also be used for other applications.
- Another advantage of the method can be that validated virtual models (in any number) can be used to test several test scenarios by parallelization. This can result in time and cost savings, whereas a physical test bench can typically only run one test at a time.
- the numbering of the steps can specify a sequence of execution, for example in ascending order. However, execution can also deviate from the ascending order.
- the steps can, for example, be carried out in the order I, II, III, IV, V. Alternatively, the steps can be carried out in the order I, III, II, IV, V or in the order III, I, II, IV, V. Steps I and III can be carried out simultaneously. Step I can be carried out before step II is carried out. Step V can in particular be carried out after step IV. Step IV can in particular be carried out after step II.
- the test bench applies the maximum load that can be applied to the test object in step II.
- This can be advantageous, for example, because a load case is mechanically tested that is comparatively close to the simulated load test in step V.
- the quality of the simulation model can be improved if the simulation model can be validated in step IV with load cases that are comparatively close to the simulated load case.
- step IV may include simulating loading of the test object under the same partial load as in the partial load stress test of step II in the simulation model.
- the results of the partial load stress test of step II and the results of the partial load simulation may be compared with each other.
- the simulation model can be adapted in step IV.
- an adaptation can take place if the results of the partial load stress test in the test bench and the partial load simulation are not the same and/or are not within a predefined tolerance range.
- the quality of the simulation model can in particular represent how similar a test simulated with the simulation model is to a test on a test bench under the same boundary conditions.
- the quality can be defined, for example, by a mapping quality of the test in the simulation process. The more similar the results of a simulated test are to the results of the same test on the test bench, the better the quality can be.
- the simulation model can be adapted in step IV by adapting parameters of the simulation model, in particular if the physical-mathematical model remains unchanged. Additionally or alternatively, the simulation model can be adapted in step IV by adapting the physical-mathematical model to describe the system. New and/or modified parameters can be used in this case.
- step II can be repeated for at least one further partial load and/or at least two further partial loads and/or at least three further partial loads.
- Step II can be repeated for a plurality of partial loads.
- the one partial load or the several partial loads can in particular be smaller than the maximum load that can be applied by the test bench.
- the results of the repeated test or the repeated Tests can be used to validate the simulation model in step IV. This can improve the accuracy of the simulation model. A large number of tests can be used to detect non-linear behavior of a test object. The quality of the simulation results in step V can be improved.
- the results of the partial load stress test in step II may be used as a reference to adjust the simulation model such that the measurements from the partial load stress tests substantially correspond to the simulation results of the partial load stress test(s) in the simulation. This may increase the accuracy of the simulation model.
- the maximum load that can be applied by the test bench can be at least 40% and/or at least 50% and/or at least 60% and/or at least 70% and/or at least 90% of the full load of the test object.
- the maximum load that can be applied to the test bench of at least 40% and/or at least 50% can have the advantage that enough data can be collected on the test bench to validate the simulation model relatively accurately. Furthermore, test bench costs and/or dimensions can be kept relatively low.
- Ranges of at least 60% and/or at least 70% of the full load of the test object can have an improved simulation model quality compared to methods with lower maximum loads that can be applied by the test bench. Furthermore, test bench costs and/or dimensions can be kept comparatively low.
- Ranges of at least 80% and/or at least 90% of the full load of the test object can provide even better simulation results than methods with lower maximum loads that can be applied to the test bench.
- the test bench costs and/or dimensions increase compared to methods with test benches with lower maximum loads that can be applied.
- the maximum load that can be applied by the test bench can, for example, be a maximum of 99% and/or a maximum of 90% and/or a maximum of 80% and/or a maximum of 70% and/or at most 65% and/or at most 60% of the full load of the test object.
- Test benches that have very high maximum loads that can be applied, for example up to 99% and/or up to 90% of the full load of the test object, can provide very accurate results in the simulation process.
- a smaller and/or more cost-effective test bench can be used compared to a process that also provides for the full load test on the test bench.
- "Smaller" can be understood here as essentially "less powerful”. Less powerful test benches can usually also be built "smaller” in terms of space. With a lower maximum load, the test object to be tested at partial load can still be integrated with the test bench, particularly geometrically/physically.
- test benches that have high maximum loads that can be applied, for example up to 80% and/or up to 70% of the full load of the test object, can provide accurate results in the simulation process.
- the cost savings compared to a test bench that can test the full load of the test bench are significant.
- a comparatively small test bench can be used, which takes up correspondingly less storage space.
- it can be advantageous to use a test bench whose maximum load that can be applied is at most 65% and/or at most 60% of the full load of the test object.
- Such a test bench is typically much smaller and cheaper than a test bench that is able to apply higher loads.
- Steps I and/or II and/or III and/or IV and/or V can be carried out repeatedly for different types of load, for example.
- steps II and IV and V can be carried out repeatedly for different types of load, for example for a torsional moment and/or a bending moment and/or a tensile force and/or a compressive force.
- steps II and IV can be carried out for one or more different partial loads.
- step V may include simulating a stress test of the device under test under overload in the validated simulation model.
- Overload can, for example, be defined as a load in a range of 120% to 200% of full load.
- the proposed hybrid test method can be particularly suitable for testing a technical system which is subjected to loads on a test bench and/or a shaft-bearing unit of a drive train of a technical machine and/or a drive train of a wind turbine or a gear stage of a drive train or a motor vehicle cardan shaft or a planetary gear for wind turbines or a rolling bearing.
- the test object can accordingly be a technical system which is subjected to loads on a test bench and/or a shaft-bearing unit of a drive train of a technical machine and/or a drive train of a wind turbine and/or a gear stage of a drive train and/or a motor vehicle cardan shaft and/or a planetary gear for wind turbines or a rolling bearing.
- Fig. 1 is a schematic flow diagram illustrating a hybrid test procedure for determining a test object’s behaviour under predefined loads
- Fig. 2 is a diagram showing proportions of measurement results from physical tests and simulation results depending on the load
- Fig. 3 shows an exemplary process diagram illustrating a hybrid test procedure for determining the behavior of a test object under predefined loads
- Fig. 4 shows an exemplary process diagram illustrating a hybrid test method for measuring a deformation of a machine support of a drive train of wind turbines (WEA) under various combined loads
- Fig. 5 shows an exemplary process diagram illustrating a hybrid test procedure for testing a motor vehicle cardan shaft
- Fig. 6 shows an exemplary process diagram illustrating a hybrid test method for testing gear deformation and planet carrier displacement of a gearbox for wind turbines.
- Figure 1 shows a flow chart 100 to illustrate a hybrid test method for determining the behavior of a test object under predefined loads.
- a test bench with a test object to be tested is provided.
- the test bench has a maximum load that can be applied to the test object by the test bench.
- a full load is defined for the test object.
- the full load of the test object is greater than the maximum load that can be applied to the test bench.
- the maximum load that can be applied to the test object is, for example, 80% of the full load of the test object.
- at least one simulation model 105 is provided that is designed to test the test object.
- the test object is subjected to a mechanical load test on the test bench in step 103.
- the test conditions are predefined and the test bench is set up accordingly.
- the test object is subjected to a partial load.
- the partial load is less than the full load of the test object.
- the partial load is either less than or equal to the maximum load that can be applied by the test bench.
- the partial load applied to the test object during the test is, for example, 80% of the full load of the test object and thus corresponds to the maximum load that can be applied by the test bench.
- the mechanical load test has results 104.
- the results 104 are used to validate the simulation model 105 so that a validated simulation model 106 is generated.
- the validated simulation model 106 is used to simulate a load on the test object under full load, which results in simulation results 107 of a full load on the test object.
- the mechanical load test according to step 103 can optionally be repeated for further partial loads of the test object, so that results 104 are also generated for these partial loads.
- the simulation model 105 can be validated with the results of these further tests, which increases the accuracy of the validated simulation model 106. This leads to optimized full-load simulation results 107.
- simulations can be carried out over the entire specified load or operating range. In this way, the real measurement results of the test campaign in the load range below the nominal loads can be used twice: firstly to validate one or more realistic simulation models and secondly as measurement results for all (relevant) tests below the nominal loads.
- Figure 2 shows a diagram 200 which shows the respective proportions of measurement results from physical tests 201 and simulation results 202 for the test procedure according to Figure 1 over the load.
- the range 203 represents the load range that can be applied to the test object by the test bench.
- the load 204 is therefore the maximum load that can be applied by the test bench.
- the load 205 corresponds to the full load of the test object.
- the simulations can be extended back to the partial load range in order to investigate cross-range dynamic test scenarios, e.g. from idling to the full or overload range.
- test bench capacity 203 can be significantly reduced compared to the conventional full load test. Tests can therefore be shifted to smaller, cost-efficient test benches (which can also operate with higher accuracy due to their principle); or not currently in Full load testable systems can be tested on existing test benches, even though their load requirements may exceed the test bench capacity. Using the procedure shown in Figure 1, it is therefore possible to achieve equivalent results to the full load test without having to rely on a test bench with maximum load introduction capacity.
- Figure 3 shows a process diagram 300 illustrating an example of a hybrid test method for determining the behavior of a test object under predefined loads.
- the process diagram 300 shows a test method for a drive train of a wind turbine. In particular, loads, deformations and oscillations or vibrations of the system are examined.
- a simulation model 302 of a test bench with a virtual test object in this case with a simulation model of a drive train of a wind turbine, is provided.
- Information 301 is fed into the simulation model 302.
- the information can include, for example, specified loads, for example static loads and/or torques.
- the loads can be, for example, partial loads in the range of 50 - 60% of the full load 308.
- the simulation model the behavior of the drive train under the specified loads can be investigated by simulation.
- the simulation provides results 303 as output.
- the results 303 of the simulation can be or include, for example, information on loads and/or deflection and/or deformations and/or stresses and/or vibrations of the test object.
- the behavior of the test object, here the drive train, under partial load can be simulated.
- the results relating to the virtual test object can be applied to the real test object.
- a test bench 304 in which a real test object, here the drive train of the wind turbine, is integrated for testing.
- the test object is tested on the test bench, whereby the test object is subjected to the same loads as the virtual test object in the simulation.
- the test provides results 310 as output.
- the results 310 of the test can, for example, contain information on loads and/or deflection and/or deformation. and/or stresses and/or vibrations of the test object.
- the results 310 of the test are compared with the results 303 of the simulation. If the results 310 of the test correspond to the results 303 of the simulation or if the deviation is less than or equal to 5%, a further simulation 306 is carried out.
- the simulation model is adapted, in particular based on information from the test, as symbolized by the arrow 307.
- the possibly adapted simulation model 302 is used for the simulation 306.
- the simulation is carried out under full load conditions 308 and provides as a result 309 information on the behavior of the test object, here the drive train of the wind turbine, under full load conditions.
- it is therefore possible to achieve results equivalent to the full load test without having to rely on a test bench with maximum load introduction capacity.
- tolerances for deviations can also be provided, for example 0.1% or 1% or 2% or 10% or 15% or 20%.
- the quality of the results from the simulated tests can essentially be determined by the quality (accuracy) of the previously validated test object models.
- the test object can exhibit consistently linear operating and system behavior.
- the test specimen models identified and validated by partial load testing can be used to simulate the test specimen's behavior in the full load range without any further steps.
- the systems to be tested may exhibit non-linearities.
- a ratio between the test specimen load and the test bench load capacity can be used, in particular between 1.001-100, in particular 1.3-3, in particular 1.5-3. This can have the advantage that non-linearities of the test specimen can be measured comparatively well in the partial load range during the physical test bench tests.
- the quality of the non-linear test specimen models derived from the test bench tests can essentially be determined by the type of model, the identification of the non-linearities and their parameter-dependent (operating state, load-dependent) extrapolation into the full load range.
- To identify non-linear system behavior tried and tested procedures for parametric and non-parametric identification of system behavior.
- neural networks general methods of machine learning or methods of regression and optimization can be used. If the nonlinearities can be described using multilinear polynomials, optimization techniques can be used advantageously in conjunction with tensor calculations.
- Figure 4 illustrates in a process diagram 400 a hybrid test method for measuring a deformation of a test object, in this case a machine carrier of a drive train of wind turbines (WEA) under various combined loads.
- a test object in this case a machine carrier of a drive train of wind turbines (WEA) under various combined loads.
- WEA drive train of wind turbines
- the method is intended to be used to examine the deformation of the machine support at the gearbox support, for example so that the azimuth bearing and drive are not subjected to excessive loads by a deformed machine support. Combined loads from rotor torques as well as bending and transverse forces were determined in advance as load cases to be examined.
- a simulation model 402 of the test bench with test object is provided.
- the simulation model can, for example, already exist and have been created as part of the design/development of the drive train.
- the simulation model can be an FE simulation model.
- FE simulations of the deformation of the machine support can already have been carried out in this simulation model 402.
- the simulations can, for example, not be validated. Due to numerous assumed model and material parameters, the results can therefore be subject to a certain degree of uncertainty. A test under full load should therefore confirm/validate the design assumptions.
- test bench 404 which cannot fully achieve the intended loads, in this case for example only about 50-70% of the target load.
- the test object is tested in real size on the "under-dimensioned" test bench 404, whereby the loads 401 do not fully correspond to the target loads due to the test bench limitations, but are scaled down according to the test bench capacity.
- the test object has a full load torque of 12MNm.
- the test on the test bench 404 is carried out at a partial load, namely a torque of 8MNm.
- the test object has a full load bending moment of 24MNm.
- the test on the test bench 404 is carried out at a partial load, namely a bending moment of 16MNm.
- the actual loads introduced can be the maximum loads of the test bench; a proportional scaling of the target loads is not necessarily required.
- the physical tests carried out yield initial measurement results 410 for the desired target value "deformation of the machine support (e.g. in the x and y directions)", which in the example can be present as time series from a distance sensor (e.g. laser distance measurement). Individual target loads below the test bench capacity may already have been reached, but overall the desired results under the target load cannot be determined from the physical tests.
- a new simulation model 406 is now created and parameterized, which can reproduce exactly the physical test results of the relevant sensors.
- the model 402 already developed for the design can also be used for this and fitted/adjusted with appropriate parameter corrections.
- the same partial loads 401 are set that were tested in the test on the test bench 404 (in this case as a bending moment of 16MNm and a torque of 8MNm).
- the results 403 of the simulation with the simulation model 402 are validated with the results from the test on the test bench 404 in step 405.
- the simulation model is adjusted (symbolized by the arrow 407) until the results of the adjusted simulation model 402 essentially match the test results.
- the final adapted simulation model corresponds to the validated simulation model 406.
- the test bench can also be mapped in the simulation model.
- the validated simulation model 406 is able to output the measured variable of interest (deformation of the machine support) with significantly greater accuracy than a non-validated simulation model or a simulation model that is not adapted to test results.
- the simulation model therefore delivers accurate results up to the level of the loads introduced in the physical test, as it has been optimized for these measurement results. With this partial load validated simulation model, simulations are now carried out under the desired target loads 408, which could not be reached in the physical test. Virtual tests are therefore carried out at full load.
- the expected deformations 409 of the machine support at full load and/or overload can be determined with high accuracy. Additional physical tests at the real target loads are thus replaced.
- the measurement results from the physical tests at partial load and the virtual test results from the simulations with the partial load-validated simulation model provide a comparable information content to a physical test that would have been carried out with the target loads.
- Figure 5 illustrates a hybrid test method for testing a motor vehicle cardan shaft in a process diagram 500.
- the method essentially corresponds to the methods described in Figures 1 to 4.
- 504 is a test bench for examining motor vehicle cardan shafts.
- the test bench can introduce speed, torque, spring travel and steering movement to the test object according to the load profiles. Parameters such as speed, torque, spring travel, bending angle or joint temperature are measured or controlled.
- the test capacity is limited by the maximum torque and the range of spring movement (spring travel, speed, acceleration) that the test bench can provide.
- the test object i.e. the motor vehicle cardan shaft, is tested within the capacity of the test bench 504 at partial load 501.
- the partial load 501 is in particular in a range of 50-60% of the full load 508.
- a virtual Model 502 of the test bench with test object is available. With the virtual model 502, the test is carried out virtually under partial load conditions 501. Results 503 are generated.
- the test results 510 of the test on the test bench 504 e.g. the measured axial force and the torsional play
- the test results 510 of the test on the test bench 504 are used to validate (symbolized by the arrow 507) the virtual model 502 of the test object (and if applicable the test bench) under the same partial loads in step 505, so that a validated virtual model 506 is generated.
- the remaining full loads 508 can be simulated and results 509 at full load can be determined. In this case, the results 509 can be present, for example, as an axial force corresponding to the full loads and as a torsional play reaction.
- Figure 6 illustrates a process diagram 600 of a hybrid test method for testing gear deformation and planet carrier displacement of a gearbox for wind turbines.
- the method essentially corresponds to the methods described in Figures 1 to 5.
- 604 is a gearbox test bench.
- Gearbox test benches are an important and certification-relevant component of the development process for wind turbines that have a gearbox.
- the gearbox test bench 604 can, for example, apply torque and/or bending and/or thrust and/or shear loads. In this case, for example, the deformation of the gearing and the displacement of the so-called planet carrier can be examined.
- the test bench 604 has specific limits for the level of the maximum loads that can be applied.
- the reaction of the gearbox to loads that exceed this load capacity of the test bench can be determined based on the partial load-validated virtual model 606 with significantly improved quality compared to a non-validated model 602.
- the transmission is tested with partial loads 601, for example with torque and/or bending loads within the capacity of the test bench 604.
- Test results 610 are generated. These loads 601 may only be in a partial area of the test that meets the desired test requirements. During these partial load tests, the deformation of the gearing and the resulting displacement of the planet carriers are measured. Results 603 are determined for the same partial loads using a virtual model 602.
- the measured test results 610 are used to validate 607 the virtual model 602 of the gearbox to be tested (and the test bench, if necessary) for the same partial loads, so that a validated model 606 is generated.
- the validated virtual model 606 the remaining full loads 608 can be simulated and results 609 in the form of deformation of the gearing and the displacement of the planet carrier corresponding to the full loads can be determined.
- the partial load 601 can, for example, be 50-60% of the full load 608.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022211558.9A DE102022211558A1 (de) | 2022-11-01 | 2022-11-01 | Hybrides Prüfverfahren, insbesondere für einen Antriebsstrang von Windenergieanlagen |
| PCT/EP2023/080462 WO2024094748A1 (de) | 2022-11-01 | 2023-11-01 | Hybrides prüfverfahren, insbesondere für einen antriebsstrang von windenergieanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4612472A1 true EP4612472A1 (de) | 2025-09-10 |
Family
ID=88647476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23798793.8A Pending EP4612472A1 (de) | 2022-11-01 | 2023-11-01 | Hybrides prüfverfahren, insbesondere für einen antriebsstrang von windenergieanlagen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4612472A1 (de) |
| KR (1) | KR20250097916A (de) |
| DE (1) | DE102022211558A1 (de) |
| WO (1) | WO2024094748A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4217587C2 (de) | 1992-05-21 | 1999-02-25 | Ernst Dipl Ing Kasten | Anlagen-Diagnoseverfahren |
| DE19613042C2 (de) | 1996-04-01 | 1998-05-20 | Pahnke Hans Joachim | Pumpen-Prüfstand mit Energie-Rückgewinnung |
| DE102011015630A1 (de) * | 2011-03-31 | 2011-11-10 | Daimler Ag | Verfahren zum Prüfen eines Geräts |
| DE102017110228A1 (de) | 2017-05-11 | 2018-11-15 | Mt Aerospace Ag | Verfahren zur Vorhersage von Versagenslasten von Strukturen aus Faserverbundwerkstoffen auf Basis von Schallemissionsdaten |
| AT521917A1 (de) * | 2018-12-10 | 2020-06-15 | Avl List Gmbh | Prüfstand mit einem Prüflingsmodell |
-
2022
- 2022-11-01 DE DE102022211558.9A patent/DE102022211558A1/de active Pending
-
2023
- 2023-11-01 KR KR1020257017535A patent/KR20250097916A/ko active Pending
- 2023-11-01 EP EP23798793.8A patent/EP4612472A1/de active Pending
- 2023-11-01 WO PCT/EP2023/080462 patent/WO2024094748A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250097916A (ko) | 2025-06-30 |
| WO2024094748A1 (de) | 2024-05-10 |
| DE102022211558A1 (de) | 2024-05-02 |
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