Liquid oxygen kerosene engine assembly test service system

Abstract

The present application relates to the technical field of liquid oxygen kerosene engine test, in particular to a liquid oxygen kerosene engine component test service system, comprising: a component inherent characteristic lossless decoupling scanning unit, used for obtaining a pure inherent characteristic database of a measured component in an offline state and a coupling boundary characteristic database of the measured component after being connected to a test bench pipeline; a two-way vector value transmission calibration unit, used for reconstructing a two-way vector value transmission link based on the pure inherent characteristic database and the coupling boundary characteristic database. The present application provides a unified time anchor point for all actions of the whole system through a global full-order time synchronization unit, ensures the time consistency of the whole system actions, eliminates the reference offset and data mismatch problems caused by the time sequence deviation, and realizes the transformation of the test core from the test bench system to the measured component through the overall architecture, solves the measurement distortion problem caused by the coupling of the measured component and the test bench system, and avoids the problem that the coupling distortion cannot be identified and stripped through post-evaluation.

Description

Technical Field

[0001] This invention relates to the field of liquid oxygen-kerosene engine testing technology, specifically to a liquid oxygen-kerosene engine component testing service system. Background Technology

[0002] Ground testing of core components of liquid oxygen-kerosene engines is a crucial step in supporting component development iterations and flight reliability verification. The core objective of the testing is to obtain the actual inherent performance of the components under simulated flight conditions, providing core data support for component performance optimization, batch consistency control, and flight condition adaptation. It is a critical link in the liquid rocket engine development system, bridging the gap between earlier and later stages.

[0003] Among the existing publicly disclosed patent technologies, publication number CN113819981B, patent name is "Evaluation Device and Method for Uncertainty of Kerosene Flow Rate in Liquid Oxygen-Kerosene Engine Test". This scheme takes the test bench measurement system as the core, builds an in-situ calibration and measurement unit, establishes an uncertainty evaluation model based on the test bench pipeline medium parameters, realizes the accuracy optimization and post-evaluation of flow measurement parameters during engine testing, and provides a mature technical path for the performance control of the test bench measurement system.

[0004] Existing technologies all rely on the test bench measurement system as the core of calibration and evaluation, treating the component under test (DUT) merely as a passive measurement object. This neglects the inherent characteristics of the DUT itself, which in turn alters the value transmission chain of the test bench calibration benchmark. Consequently, the acquired measurement data is a distorted result of the coupling between the test bench system and the DUT, rather than reflecting the component's true inherent performance. This distortion caused by the coupling between the DUT and the measurement system cannot be identified and eliminated through post-hoc uncertainty assessment, thus preventing the test data from providing effective support for the refined research and development iteration of the component. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a liquid oxygen-kerosene engine component testing service system, which solves the problems of measurement distortion caused by the coupling between components and the test bench, and the inability to identify and remove coupling distortion afterward.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a liquid oxygen / kerosene engine component testing service system, comprising:

[0007] The component inherent characteristic non-destructive decoupling scanning unit is used to acquire the pure inherent characteristic database of the component under test in the offline state and the coupling boundary characteristic database of the component under test after it is connected to the test bench pipeline.

[0008] The dual vector value transfer calibration unit is used to reconstruct the dual vector value transfer link based on the pure intrinsic characteristic database and the coupled boundary characteristic database, and generate a calibration benchmark adapted to the component under test.

[0009] The coupling boundary distortion removal measurement unit is used to collect the operating parameters of the component under test, and remove the signal distortion of the connection interface according to the coupling boundary characteristic database, and output pure intrinsic performance data reflecting the operating state of the component under test.

[0010] The two-dimensional uncertainty stratification unit is used to perform stratified evaluation of the uncertainty introduced into the measurement system and the inherent performance dispersion of the components;

[0011] The component performance traceability test service closed-loop unit is used to establish a full-condition performance traceability file for the tested component based on the evaluation results, and output model optimization instructions to the preceding unit.

[0012] A global, full-order time synchronization unit is used to provide time anchors for alignment of all system actions;

[0013] The output of the full-domain, full-order time synchronization unit is connected to the time synchronization control terminal of each of the other units.

[0014] The output of the component's inherent characteristic non-destructive decoupling scanning unit is connected to the input of the dual vector value transfer calibration unit, the coupling boundary distortion real-time stripping measurement unit, and the dual-dimensional uncertainty hierarchical evaluation unit, respectively.

[0015] The first output of the dual vector value transfer calibration unit is connected to the coupling boundary distortion time stripping measurement unit, and the second output is connected to the dual-dimensional uncertainty hierarchical evaluation unit.

[0016] When the coupling boundary is distorted, the output of the stripping measurement unit is connected to the measured data input of the two-dimensional uncertainty hierarchical evaluation unit;

[0017] The output of the two-dimensional uncertainty stratified evaluation unit is connected to the input of the component performance traceability test service closed-loop unit.

[0018] Furthermore, the component's inherent characteristic lossless decoupling scanning unit performs a two-stage scan:

[0019] The first stage is the offline inherent characteristic scanning of the component. When the component under test is not connected to the test bench pipeline, the inherent flow resistance characteristics, full-condition flow field response characteristics and inlet and outlet interface impedance characteristics of the component under test are obtained through non-contact flow field scanning and medium flow test, and the pure inherent characteristic database is constructed.

[0020] The second stage is the scanning of coupling boundary characteristics after connection. After the component under test is connected to the test bench pipeline, a non-powered flow test is carried out to obtain the flow field distortion characteristics and impedance mismatch characteristics of the connection interface between the component under test and the test bench pipeline, and to construct the coupling boundary characteristic database.

[0021] Furthermore, the dual-vector value transfer calibration unit includes two parallel calibration paths:

[0022] The first calibration path is the positive reference transfer path, which takes the legal metrological standard as the source and completes the initial reference alignment of the basic measurement channel of the test bench;

[0023] The second calibration path is a reverse anchoring calibration path, which uses the pure inherent characteristic database as the anchor point and the inlet and outlet interfaces of the component under test as the start and end nodes of the value transmission. It reversely calibrates the reference offset caused by the coupling boundary characteristics in the measurement link of the test bench, and reconstructs the calibration reference adapted to the component under test.

[0024] The calibration actions of the bidirectional calibration path are executed in parallel with the subsequent testing process.

[0025] Furthermore, the distortion stripping measurement unit has a built-in distortion stripping model bound to the coupling boundary characteristic database. The distortion stripping model synchronously collects the full-condition operating parameters of the component under test during the test process, and strips the measurement signal distortion caused by the flow field distortion and impedance mismatch at the connection interface between the component under test and the test bench based on the coupling boundary characteristic database. At the same time, it eliminates the interference of the test bench piping system's own characteristics on the measurement data.

[0026] Furthermore, the two-dimensional uncertainty hierarchical assessment unit incorporates a hierarchical decoupled uncertainty assessment model, which performs assessments in two dimensions:

[0027] The first dimension introduces uncertainty assessment for the measurement system, which assesses the uncertainty components brought about by the entire measurement system process based on the calibration benchmark and the end-to-end transmission characteristics.

[0028] The second dimension is the evaluation of the inherent performance dispersion of the component. Based on the pure inherent characteristic database and the measured pure inherent performance data, the performance fluctuation and dispersion characteristics of the tested component are evaluated.

[0029] Furthermore, the closed-loop unit of the component performance traceability test service establishes a full-condition performance traceability file for the tested component, binds the pure inherent performance data with the design indicators, material characteristics, processing technology, and assembly process of the tested component for full-chain traceability, and generates component performance optimization suggestions, batch consistency control references, and flight condition adaptation schemes based on the binding results.

[0030] Furthermore, the full-domain, full-level time synchronization unit sets corresponding time synchronization nodes for characteristic scanning, bidirectional calibration, data acquisition, uncertainty assessment, and service output according to different stages of the test process. By aligning the actions of each unit on the time axis, it eliminates the reference offset and data mismatch caused by the time difference between different stages.

[0031] Furthermore, the pure intrinsic characteristic database and the coupling boundary characteristic database obtained by the component inherent characteristic non-destructive decoupling scanning unit are distributed in real time to the dual vector value transfer calibration unit, the coupling boundary distortion real-time stripping measurement unit, and the dual-dimensional uncertainty hierarchical evaluation unit via the system bus, serving as the characteristic benchmark for the entire process operation.

[0032] Furthermore, the two-dimensional uncertainty stratified evaluation unit outputs evaluation results in real time throughout the entire testing process, and the evaluation results are used to distinguish between the performance deviation of the tested component itself and the error brought by the measurement system.

[0033] Furthermore, the model optimization instructions output by the closed-loop unit of the component performance traceability test service are used to adjust the parameters of the distortion stripping model and the hierarchical decoupling uncertainty assessment model in the preceding unit, so as to realize the dynamic optimization of the system calibration, measurement and assessment capabilities.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] This invention constructs a full-process testing service system based on the inherent characteristics of the component under test (DUT). It first performs a two-stage decoupling scan of the component's offline inherent characteristics and its coupling boundary characteristics after connection, acquiring corresponding characteristic data as the benchmark for the entire process. It then reconstructs the dual-vector value transmission link to generate a calibration benchmark adapted to the DUT. During operational testing, it simultaneously removes signal distortion at the connection interface and interference from the characteristics of the test bench piping system, outputting pure inherent performance data reflecting the component's operating state. Simultaneously, it performs layered decoupling evaluation of the uncertainty introduced by the measurement system and the inherent performance dispersion of the component, clearly distinguishing the sources of performance deviations. Combined with full-domain, full-order time synchronization, it provides a unified time anchor point for the entire system's actions, eliminating benchmark offsets and data mismatches caused by time differences between different stages. Finally, it establishes a full-condition performance traceability archive for the DUT, forming a closed-loop testing service. This achieves dynamic optimization of the system's calibration, measurement, and evaluation capabilities, transforming the testing core from the test bench system to the DUT. It solves the measurement distortion problem caused by the coupling between the DUT and the test bench system, avoiding the inability to identify and remove coupling distortion through post-evaluation. Attached Figure Description

[0036] Figure 1 This is a diagram illustrating the overall architecture of the liquid oxygen / kerosene engine component testing service system of the present invention.

[0037] Figure 2 This is a flowchart of a two-stage scanning process for non-destructive decoupling of the inherent characteristics of the components in this invention.

[0038] Figure 3 This is a flowchart of the dual-vector value transfer calibration process of the present invention;

[0039] Figure 4This is a flowchart of the stripping measurement process under coupling boundary distortion according to the present invention;

[0040] Figure 5 This is a flowchart illustrating the closed-loop process of dual-dimensional evaluation and performance traceability of the present invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figures 1-5 This invention provides a liquid oxygen / kerosene engine component testing service system, comprising:

[0043] The component inherent characteristic non-destructive decoupling scanning unit is used to acquire the pure inherent characteristic database of the component under test in the offline state and the coupling boundary characteristic database of the component under test after it is connected to the test bench pipeline.

[0044] The dual vector value transfer calibration unit is used to reconstruct the dual vector value transfer link based on the pure intrinsic characteristic database and the coupled boundary characteristic database, and generate a calibration benchmark adapted to the component under test.

[0045] The coupling boundary distortion removal measurement unit is used to collect the operating parameters of the component under test, and remove the signal distortion at the connection interface according to the coupling boundary characteristic database, and output pure intrinsic performance data reflecting the operating state of the component under test.

[0046] The two-dimensional uncertainty stratification unit is used to perform stratified evaluation of the uncertainty introduced into the measurement system and the inherent performance dispersion of the components;

[0047] The component performance traceability test service closed-loop unit is used to establish a full-condition performance traceability file for the tested component based on the evaluation results, and output model optimization instructions to the preceding unit.

[0048] A global, full-order time synchronization unit is used to provide time anchors for alignment of all system actions;

[0049] The output of the full-domain, full-order time synchronization unit is connected to the time synchronization control terminal of each of the other units.

[0050] The output of the component's inherent characteristic non-destructive decoupling scanning unit is connected to the input of the dual vector value transfer calibration unit, the coupling boundary distortion time stripping measurement unit, and the dual-dimensional uncertainty hierarchical evaluation unit, respectively.

[0051] The first output of the dual-vector value transfer calibration unit is connected to the coupling boundary distortion time stripping measurement unit, and the second output is connected to the dual-dimensional uncertainty hierarchical evaluation unit.

[0052] When the coupling boundary is distorted, the output of the stripped measurement unit is connected to the measured data input of the two-dimensional uncertainty hierarchical evaluation unit;

[0053] The output of the two-dimensional uncertainty stratified assessment unit is connected to the input of the closed-loop unit for component performance traceability testing services.

[0054] This invention, through a multi-unit collaborative system architecture, uses the inherent characteristics of the component under test (DUT) as a benchmark to achieve decoupling scanning of coupling boundary characteristics, bidirectional reconstruction of the measurement transmission link, real-time removal of measurement distortion, and hierarchical evaluation of uncertainty. Ultimately, it forms a closed-loop service system for performance traceability, stably acquiring the component's true inherent performance data and providing effective support for the refined R&D iteration of the component. The solution provides a unified time anchor point for all actions of the entire system through a full-domain, full-order time synchronization unit, ensuring the time consistency of all system actions and eliminating benchmark offset and data mismatch problems caused by timing deviations. The overall architecture transforms the testing core from the test bench system to the DUT, solving the measurement distortion problem caused by the coupling between the DUT and the test bench system, and avoiding the problem that coupling distortion cannot be identified and removed through post-evaluation.

[0055] In one specific embodiment, the component-inherent characteristic lossless decoupling scanning unit performs a two-stage scan:

[0056] The first stage is the offline scanning of the inherent characteristics of the components. Without the components under test connected to the test bench pipeline, the inherent flow resistance characteristics, full-condition flow response characteristics, and inlet and outlet interface impedance characteristics of the components under test are obtained through non-contact flow field scanning and medium flow test, and a pure inherent characteristic database is constructed.

[0057] The second stage is the scanning of coupling boundary characteristics after connection. After the component under test is connected to the test bench pipeline, a non-powered flow test is carried out to obtain the flow field distortion characteristics and impedance mismatch characteristics of the connection interface between the component under test and the test bench pipeline, and to build a coupling boundary characteristic database.

[0058] Specifically, the offline inherent characteristic scanning of the components is conducted after the components under test have completed factory inspection and are not connected to the test bench piping. Non-contact flow field scanning is achieved using particle image velocimetry technology, which can acquire the full flow field distribution data of the internal flow channels of the component without disturbing the internal flow field. The medium flow test uses room-temperature kerosene and gaseous oxygen, the same medium used in the engine. The flow pressure covers the entire design pressure range of the component under all operating conditions. The flow rate gradually increases from the minimum stable flow rate to the rated flow rate and then to the ultimate flow rate. Each flow rate point is maintained stably for a preset duration. Inlet and outlet pressure, flow rate, and temperature parameters under the corresponding operating conditions are collected, and the inherent flow resistance characteristic curve of the component is obtained by fitting the curve. The fitting formula for the inherent flow resistance characteristic is: In the formula, The pressure difference between the inlet and outlet of the component under test. The inherent flow resistance coefficient of the component. The flow rate of the medium through the component. The flow resistance characteristic index is determined by the internal flow channel structure of the component and is obtained by fitting multiple sets of operating condition data from offline flow tests. The full-condition flow field response characteristics are obtained by gradually adjusting the medium operating parameters during the flow test, recording the response time, pressure fluctuation amplitude, and flow field distribution variation of the internal flow field to changes in operating conditions, forming a full-condition flow field response characteristic dataset. The inlet and outlet interface impedance characteristics are tested by setting multiple pressure sensors on the inlet and outlet end faces of the component, collecting the pressure wave reflection and transmission characteristics at the inlet and outlet interfaces under different flow conditions, and calculating the interface impedance parameters. All characteristic parameters obtained from offline scanning are stored in a pure intrinsic characteristic database. The database uses a structured storage method, classifying and managing data according to component model, batch, and serial number, and can achieve real-time data retrieval and distribution via the system bus. The implementation of the post-connection coupling boundary characteristic scan is carried out after the component under test and the test bench pipeline have completed rigid connection and passed the sealing test. During the non-powered flow test, the component's own power actuator is not activated; only the medium with the same parameters as in the offline test is supplied through the test bench pipeline system, covering the full operating condition range of subsequent component tests. During testing, equally spaced measurement sections were set on both sides of the connection interface between the component and the test bench piping. Flow field distribution, pressure pulsation, and flow rate distribution data were collected on both sides. The characteristics of the component's inlet and outlet interfaces were compared with those under offline conditions to extract flow field distortion parameters introduced by the connection interface, including velocity distribution non-uniformity, eddy region range, and pressure loss increment. Simultaneously, pressure wave transmission characteristics at the interface were collected using a broadband pressure sensor, and the impedance mismatch between the component and the test bench piping was calculated. All coupling boundary characteristic parameters were stored in a coupling boundary characteristic database. A one-to-one mapping relationship was established between this database and the pure intrinsic characteristic database of the corresponding tested component, ensuring that subsequent units can simultaneously retrieve both sets of characteristic data.

[0059] In one specific embodiment, the dual-vector value transfer calibration unit includes two parallel calibration paths:

[0060] The first calibration path is the positive reference transfer path, which takes the legal metrological standard as the source and completes the initial reference alignment of the basic measurement channel of the test bench;

[0061] The second calibration path is the reverse anchoring calibration path, which uses the pure intrinsic characteristic database as the anchor point and the inlet and outlet interfaces of the component under test as the start and end nodes of the value transfer. It reversely calibrates the reference offset caused by the coupling boundary characteristics in the measurement link of the test bench and reconstructs the calibration reference to adapt to the component under test.

[0062] The calibration actions of the bidirectional calibration path are executed in parallel with the subsequent testing process.

[0063] Specifically, the implementation of the forward reference transfer path follows the requirements of the national legal metrology system for value transfer. Standard measuring instruments that have been verified and qualified by legal metrology institutions are used to calibrate the basic measurement channels of the test bench, such as pressure, flow, temperature, and vibration, point by point. The calibration points cover the full range of the measurement channels. Each calibration point is calibrated multiple times, and the average value is taken as the reference value of that point. The initial reference alignment of all measurement channels is completed, forming the initial calibration parameter set of the basic measurement channels, ensuring that the values ​​of the basic measurement links of the test bench are traceable to legal metrology standards. The implementation of the reverse anchoring calibration path uses the inherent impedance and flow resistance characteristics of the component inlet and outlet interfaces in the pure inherent characteristic database obtained by offline scanning as fixed anchor points, and the physical interface of the inlet and outlet of the component under test as the start and end boundaries of the value transfer. The test bench measurement link is decomposed into three parts: the test bench piping system, the connection interface, and the component under test. Based on the flow field distortion and impedance mismatch characteristics in the coupling boundary characteristic database, the reference offset brought to the measurement link by the connection interface and the test bench piping system is calculated, including the static pressure transfer deviation of pressure measurement, the indication deviation caused by the flow field distortion of flow measurement, and the indication deviation caused by the heat exchange of temperature measurement. Based on the calculated reference offset, the initial calibration parameters obtained by the forward reference transfer path are corrected, and a dedicated calibration reference that is fully adapted to the current component under test is reconstructed. The two calibration paths run in parallel. The forward reference transfer path completes the initial calibration before the component is connected to the test bench, while the reverse anchoring calibration path is started after the coupling boundary characteristics scan is completed. The calibration calculation process is executed synchronously with the subsequent component operating condition test process, without occupying the test bench time separately. Without reducing the test efficiency, it achieves accurate matching between the calibration reference and the component under test, and eliminates the reference offset caused by the coupling boundary characteristics to the value transfer.

[0064] In one specific embodiment, the distortion stripping measurement unit has a built-in distortion stripping model that is bound to the coupling boundary characteristic database. The distortion stripping model synchronously collects the full-condition operating parameters of the component under test during the test process, and strips the measurement signal distortion caused by the flow field distortion and impedance mismatch at the connection interface between the component under test and the test bench based on the coupling boundary characteristic database. At the same time, it eliminates the interference of the test bench piping system's own characteristics on the measurement data.

[0065] Specifically, the distortion stripping model is trained based on computational fluid dynamics simulation and measured coupled boundary characteristic data. The input of the model is the original operating parameters collected by the test bench measurement system, the flow field distortion characteristic parameters and impedance mismatch characteristic parameters in the coupled boundary characteristic database, and the output of the model is the pure intrinsic performance data of the components after eliminating coupling distortion. During the implementation of the model, in each sampling cycle of the component operating condition test, the original operating parameters such as pressure, flow rate, temperature, and vibration of each measurement section of the test bench are collected synchronously. The sampling frequency is consistent with the time reference of the full-domain full-order time synchronization unit. First, based on the coupled boundary characteristic database, the flow field distortion of the measurement data at the connection interface is corrected. According to the measured flow velocity distribution non-uniformity and vortex region range, the indication deviation of the flow measurement is corrected to restore the true medium flow through the tested component. Then, based on the impedance mismatch characteristic parameters, the distortion caused by pressure wave reflection and superposition in the pressure measurement signal is corrected to restore the true static pressure and total pressure parameters of the inlet and outlet interfaces of the tested component. At the same time, based on the inherent characteristic parameters of the test bench pipeline system, the interference caused by pressure loss, heat exchange, and flow field disturbance of the pipeline system to the measurement data is eliminated. Finally, the pure inherent performance data that only reflects the operating state of the tested component is output. The data output is synchronized with the test process to realize the real-time removal of measurement distortion and ensure that the true performance parameters of the component can be obtained in real time during the test.

[0066] In one specific embodiment, the two-dimensional uncertainty hierarchical assessment unit incorporates a hierarchical decoupled uncertainty assessment model, which performs assessments in two dimensions:

[0067] The first dimension introduces uncertainty assessment for the measurement system, which assesses the uncertainty components brought about by the entire measurement system process based on the calibration benchmark and end-to-end transmission characteristics.

[0068] The second dimension is the evaluation of the inherent performance dispersion of the component. Based on the pure inherent characteristic database and the measured pure inherent performance data, the performance fluctuation and dispersion characteristics of the tested component are evaluated.

[0069] Specifically, the hierarchical decoupled uncertainty assessment model completely decouples the uncertainties in the two dimensions, allowing for independent assessment without interference. This clearly distinguishes the sources of performance deviations, providing a precise basis for subsequent component performance evaluation and traceability. The first dimension, measurement system uncertainty assessment, follows metrological uncertainty assessment standards. It decomposes the uncertainty components of the entire measurement system process into uncertainties introduced by the legal metrological standard, uncertainties introduced by the forward reference transfer process, uncertainties introduced by the reverse anchoring calibration process, uncertainties of the measurement sensor itself, uncertainties introduced by the signal transmission link, and uncertainties introduced by the distortion stripping model calculation process. Based on the calibration reference output by the dual-vector value transfer calibration unit and the full-link signal transmission characteristics of the measurement link, the magnitude of each uncertainty component is calculated separately. These components are then synthesized using the root sum-of-squares method to obtain the standard uncertainty and expanded uncertainty introduced by the measurement system. The formula for calculating the combined standard uncertainty introduced by the measurement system is: In the formula, To measure the combined standard uncertainty of the system, The standard uncertainty of the i-th uncertainty component in the entire measurement system process is given, where n is the total number of uncertainty components. These components are independent of each other and are synthesized using the root sum of squares method. The evaluation process is synchronized with the testing process, and the measurement system uncertainty corresponding to the current measurement data can be output in real time. The second dimension, component inherent performance dispersion evaluation, uses the component inherent characteristic parameters obtained offline from the pure inherent characteristic database as a benchmark. The real-time measured pure inherent performance data is compared with the benchmark data to calculate the fluctuation range, deviation amplitude, and distribution characteristics of the component performance parameters under the same operating condition. This evaluates the performance fluctuation and dispersion characteristics of the tested component during operation, distinguishing between changes in the component's own performance and errors introduced by the measurement system, avoiding misjudging measurement system errors as component performance deviations.

[0070] In one specific embodiment, the component performance traceability test service closed-loop unit establishes a full-condition performance traceability file for the tested component, binds the pure inherent performance data with the design indicators, material properties, processing technology, and assembly process of the tested component for full-chain traceability, and generates component performance optimization suggestions, batch consistency control references, and flight condition adaptation solutions based on the binding results.

[0071] Specifically, the full-condition performance traceability archive uses the unique serial number of the tested component as the core identifier and stores the entire process of test data in a structured manner. This includes a pure intrinsic characteristic database, a coupled boundary characteristic database, bidirectional calibration benchmark parameters, pure intrinsic performance data under all operating conditions, and two-dimensional uncertainty assessment results. It also accesses the entire lifecycle data of the component, including design indicators, simulation calculation results, and performance design thresholds in the design stage; material grades, material performance test reports, and heat treatment process parameters in the raw material stage; CNC machining process parameters, dimensional inspection reports, and geometric tolerance test results in the machining stage; and assembly process flow, assembly torque parameters, sealing test results, and factory inspection data in the assembly stage. This achieves a one-to-one correspondence between test performance data and the entire lifecycle data of the component. Based on the bound end-to-end data, we conduct source analysis on component performance to pinpoint the links where component performance deviates from design specifications. For the sources of performance deviation, we generate corresponding component performance optimization suggestions, including optimization directions for processing parameters, adjustment suggestions for assembly processes, and optimization references for structural design. At the same time, for test data of multiple components in the same batch, we analyze the performance dispersion characteristics of components within the batch and generate batch consistency control references to provide quality control basis for subsequent component mass production. In addition, by combining the component's full-condition performance test data, we analyze the component's performance response characteristics under different flight conditions and generate adaptation schemes for components and rocket flight conditions, providing data support for engine assembly and flight mission planning.

[0072] In a specific embodiment, the full-domain, full-level time synchronization unit sets corresponding time synchronization nodes for characteristic scanning, bidirectional calibration, data acquisition, uncertainty assessment, and service output according to different stages of the test process. By aligning the actions of each unit on the time axis, the reference offset and data mismatch caused by the time difference between different stages are eliminated.

[0073] Specifically, the full-domain, full-order time synchronization unit uses a satellite synchronous clock or a high-stability temperature-controlled crystal oscillator as the time reference source, and outputs a unified time synchronization signal and trigger signal. The time synchronization accuracy can reach the microsecond level, meeting the synchronization requirements of high-speed data acquisition and multi-unit collaborative operation. The unit is divided into stages according to the entire testing process, including the component offline characteristic scanning stage, the coupling boundary characteristic scanning stage after access, the two-vector value calibration stage, the component operating condition testing stage, the uncertainty assessment stage, and the performance tracing and service output stage. A corresponding time synchronization node is set for each stage, and a unified time trigger signal is set for the actions of each unit. This ensures that the characteristic data acquisition of the component inherent characteristic decoupling scanning unit, the calibration calculation of the two-vector value transfer calibration unit, the operating condition data acquisition of the coupling boundary distortion real-time stripping measurement unit, and the real-time assessment calculation of the two-dimensional uncertainty stratification assessment unit are all completed on a unified timeline. This eliminates the time difference between data acquisition and calculation between different units, avoiding calibration benchmark offset and measurement data and characteristic data mismatch problems caused by time synchronization issues. At the same time, a unified timestamp is added to the test data throughout the entire process, ensuring that all data can be accurately matched on the timeline, providing a unified time benchmark for subsequent data analysis and tracing.

[0074] In a specific embodiment, the pure intrinsic characteristic database and the coupled boundary characteristic database obtained by the component intrinsic characteristic non-destructive decoupling scanning unit are distributed in real time to the dual vector value transfer calibration unit, the coupled boundary distortion real-time stripping measurement unit, and the dual-dimensional uncertainty hierarchical evaluation unit via the system bus, serving as the characteristic benchmark for the entire process.

[0075] Specifically, the system bus adopts an industrial Ethernet bus architecture, featuring high bandwidth, low latency, and high reliability. It supports real-time bidirectional data transmission. After the pure intrinsic characteristic database and the coupled boundary characteristic database are constructed, they are broadcast synchronously and synchronously distributed to the local data buffers of the corresponding units in real time via the system bus. This ensures that the dual-vector value transmission calibration unit, the coupled boundary distortion time-shaping measurement unit, and the dual-dimensional uncertainty hierarchical evaluation unit can simultaneously retrieve the latest characteristic data without waiting for data transmission, avoiding calculation deviations caused by data asynchrony. During the distribution process, the system bus performs integrity verification and timestamp marking on the data in both databases, ensuring that the characteristic data received by each unit is completely consistent with the original data output by the scanning unit. At the same time, it adds a timestamp consistent with the full-domain, full-order time synchronization unit to the data, ensuring that the characteristic data and subsequent test data, calibration data, and evaluation data can accurately correspond on the timeline. During the execution of their respective functions, each unit uses the synchronously distributed characteristic data as the sole characteristic benchmark, ensuring that the entire calibration, measurement, and evaluation process revolves around the inherent characteristics of the component under test, achieving precise adaptation between the test benchmark and the component under test.

[0076] In one specific embodiment, the two-dimensional uncertainty stratification evaluation unit outputs evaluation results in real time throughout the entire testing process, following the testing process. The evaluation results are used to distinguish between the performance deviation of the component under test itself and the error brought by the measurement system.

[0077] Specifically, the evaluation calculation process of the two-dimensional uncertainty stratified assessment unit is executed synchronously with the component operating condition test process. During each data sampling period in the test process, a two-dimensional uncertainty assessment is completed, and the measurement system uncertainty and component performance dispersion assessment results for the corresponding sampling points are output in real time. The output delay of the assessment results does not exceed one sampling period, ensuring that testers can view the assessment results in real time during the test process and grasp the reliability of the current test data and the real-time performance status of the component. The real-time output assessment results can clearly distinguish between the performance deviation of the tested component itself and the error introduced by the measurement system. When performance parameters exceed the design threshold during the test, the source of the anomaly can be quickly determined based on the assessment results. If the anomaly originates from the error of the measurement system, the measurement system can be checked and calibrated in a timely manner to avoid invalid test procedures. If the anomaly originates from the performance deviation of the component itself, the test can be terminated in a timely manner to avoid component damage. Simultaneously, it provides accurate evidence for anomaly analysis, improving the safety and effectiveness of the test process.

[0078] In one specific embodiment, the model optimization instructions output by the closed-loop unit of the component performance traceability test service are used to adjust the parameters of the distortion stripping model and the hierarchical decoupling uncertainty assessment model in the preceding unit, so as to realize the dynamic optimization of the system calibration, measurement and assessment capabilities.

[0079] Specifically, the closed-loop unit of the component performance traceability testing service generates corresponding model optimization instructions based on the full-process data in the full-condition performance traceability archive, the deviation analysis results between component performance and design indicators, and historical data accumulated from multiple tests. These optimization instructions include parameter correction values ​​for the distortion stripping model and parameter adjustment values ​​for the hierarchical decoupling uncertainty assessment model. The parameter optimization of the distortion stripping model, based on the coupling boundary characteristic data and measured performance data accumulated during multiple tests, optimizes the flow field distortion correction coefficient, impedance mismatch correction parameters, and piping system interference removal parameters in the model, improving the model's accuracy in stripping measurement distortion and ensuring that the output pure intrinsic performance data more closely matches the actual performance of the component. The parameter optimization of the hierarchical decoupling uncertainty assessment model, based on the uncertainty component data accumulated during multiple calibrations and tests, optimizes the weight allocation and composite calculation parameters of each uncertainty component in the model, improving the accuracy and reliability of uncertainty assessment. Model optimization commands are transmitted to the model control module of the corresponding unit via the system bus, automatically updating and optimizing model parameters without manual intervention. The optimized model can be directly applied to subsequent testing processes, realizing continuous dynamic optimization of the system's calibration, measurement, and evaluation capabilities. As test data accumulates, the system's testing accuracy and service capabilities can be continuously improved, forming a complete closed-loop optimization system.

[0080] In summary, this invention constructs a full-process testing service system based on the inherent characteristics of the component under test (DUT). It first performs a two-stage decoupling scan of the component's offline inherent characteristics and its coupling boundary characteristics after connection, obtaining corresponding characteristic data as the benchmark for the entire process. It then reconstructs the dual-vector value transmission link to generate a calibration benchmark adapted to the DUT. During operational testing, it simultaneously removes signal distortion at the connection interface and interference from the characteristics of the test bench piping system, outputting pure inherent performance data reflecting the component's operating state. Simultaneously, it performs layered decoupling evaluation of the uncertainty introduced by the measurement system and the inherent performance dispersion of the component, clearly distinguishing the sources of performance deviations. Combined with full-domain, full-order time synchronization, it provides a unified time anchor point for the entire system's actions, eliminating benchmark offsets and data mismatches caused by time differences between different stages. Finally, it establishes a full-condition performance traceability archive for the DUT, forming a closed-loop testing service. This achieves dynamic optimization of the system's calibration, measurement, and evaluation capabilities, transforming the testing core from the test bench system to the DUT. It solves the measurement distortion problem caused by the coupling between the DUT and the test bench system, avoiding the problem of coupling distortion being unidentifiable and decoupled through post-evaluation.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid oxygen kerosene engine assembly test service system, characterized by, include: The component inherent characteristic non-destructive decoupling scanning unit is used to acquire the pure inherent characteristic database of the component under test in the offline state and the coupling boundary characteristic database of the component under test after it is connected to the test bench pipeline. The dual vector value transfer calibration unit is used to reconstruct the dual vector value transfer link based on the pure intrinsic characteristic database and the coupled boundary characteristic database, and generate a calibration benchmark adapted to the component under test. The coupling boundary distortion removal measurement unit is used to collect the operating parameters of the component under test, and remove the signal distortion of the connection interface according to the coupling boundary characteristic database, and output pure intrinsic performance data reflecting the operating state of the component under test. The two-dimensional uncertainty stratification unit is used to perform stratified evaluation of the uncertainty introduced into the measurement system and the inherent performance dispersion of the components; The component performance traceability test service closed-loop unit is used to establish a full-condition performance traceability file for the tested component based on the evaluation results, and output model optimization instructions to the preceding unit. The global, full-level time synchronization unit is used to provide time anchors for alignment of all system actions.

2. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The component's inherent characteristics allow for a non-destructive decoupling scanning unit to perform a two-stage scan: The first stage is the offline inherent characteristic scanning of the component. When the component under test is not connected to the test bench pipeline, the inherent flow resistance characteristics, full-condition flow field response characteristics and inlet and outlet interface impedance characteristics of the component under test are obtained through non-contact flow field scanning and medium flow test, and the pure inherent characteristic database is constructed. The second stage is the scanning of coupling boundary characteristics after connection. After the component under test is connected to the test bench pipeline, a non-powered flow test is carried out to obtain the flow field distortion characteristics and impedance mismatch characteristics of the connection interface between the component under test and the test bench pipeline, and to construct the coupling boundary characteristic database.

3. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The dual-vector value transfer calibration unit includes two parallel calibration paths: The first calibration path is the positive reference transfer path, which takes the legal metrological standard as the source and completes the initial reference alignment of the basic measurement channel of the test bench; The second calibration path is a reverse anchoring calibration path, which uses the pure inherent characteristic database as the anchor point and the inlet and outlet interfaces of the component under test as the start and end nodes of the value transmission. It reversely calibrates the reference offset caused by the coupling boundary characteristics in the measurement link of the test bench, and reconstructs the calibration reference adapted to the component under test. The calibration actions of the bidirectional calibration path are executed in parallel with the subsequent testing process.

4. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The distortion stripping measurement unit has a built-in distortion stripping model that is bound to the coupling boundary characteristic database. The distortion stripping model synchronously collects the full-condition operating parameters of the component under test during the test process, and strips the measurement signal distortion caused by the flow field distortion and impedance mismatch at the connection interface between the component under test and the test bench based on the coupling boundary characteristic database. At the same time, it eliminates the interference of the test bench piping system's own characteristics on the measurement data.

5. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The two-dimensional uncertainty hierarchical assessment unit incorporates a hierarchical decoupled uncertainty assessment model, which performs assessments in two dimensions: The first dimension introduces uncertainty assessment for the measurement system, which assesses the uncertainty components brought about by the entire measurement system process based on the calibration benchmark and the end-to-end transmission characteristics. The second dimension is the evaluation of the inherent performance dispersion of the component. Based on the pure inherent characteristic database and the measured pure inherent performance data, the performance fluctuation and dispersion characteristics of the tested component are evaluated.

6. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The closed-loop unit of the component performance traceability test service establishes a full-condition performance traceability file for the tested component, binds the pure inherent performance data with the design indicators, material properties, processing technology, and assembly process of the tested component for full-chain traceability, and generates component performance optimization suggestions, batch consistency control references, and flight condition adaptation schemes based on the binding results.

7. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The full-domain, full-level time synchronization unit sets corresponding time synchronization nodes for characteristic scanning, bidirectional calibration, data acquisition, uncertainty assessment, and service output according to different stages of the test process. By aligning the actions of each unit on the time axis, it eliminates the reference offset and data mismatch caused by the time difference between different stages.

8. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The pure intrinsic characteristic database and the coupling boundary characteristic database obtained by the component's inherent characteristic non-destructive decoupling scanning unit are distributed in real time to the dual vector value transfer calibration unit, the coupling boundary distortion real-time stripping measurement unit, and the dual-dimensional uncertainty hierarchical evaluation unit via the system bus, serving as the characteristic benchmark for the entire process.

9. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The dual-dimensional uncertainty stratified evaluation unit outputs evaluation results in real time throughout the entire testing process, and the evaluation results are used to distinguish between the performance deviation of the tested component itself and the error brought by the measurement system.

10. The liquid oxygen / kerosene engine component testing service system according to claim 1, characterized in that, The model optimization instructions output by the closed-loop unit of the component performance traceability test service are used to adjust the parameters of the distortion stripping model and the hierarchical decoupling uncertainty assessment model in the preceding unit, so as to realize the dynamic optimization of the system calibration, measurement and assessment capabilities.

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