A ground fault management system for a space station science experiment cabinet

Abstract

The application relates to the technical field of fault simulation diagnosis and health management, and particularly discloses a space station scientific experiment cabinet ground fault management system, which comprises a ground fault simulation generation system and a ground fault diagnosis system. The ground fault simulation generation system is used for performing ground fault simulation on a space station scientific experiment cabinet based on a fault sample set of the space station scientific experiment cabinet and ground test data obtained by performing ground test on the space station scientific experiment cabinet, and generating simulation fault data. The ground fault diagnosis system is used for performing test verification on the space station scientific experiment cabinet according to the simulation fault data, the ground test data and on-orbit telemetry data obtained by performing on-orbit test on the space station scientific experiment cabinet, so as to perform fault diagnosis on the space station scientific experiment cabinet. The application can better assist in carrying out fault diagnosis and maintenance decision of the space station scientific experiment cabinet, and provide stronger decision support for on-orbit maintenance of astronauts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fault simulation diagnosis and health management, and particularly relates to a ground fault management system for a space station scientific experiment cabinet. BACKGROUND

[0002] The space station scientific experiment cabinet has carried out systematic testability design in the construction stage, and the main failure modes of the interface and main functions of the on-orbit replaceable unit (ORU) at all levels have been analyzed and sorted out. However, due to design resources, system complexity, and the implementability of testability design test point layout and sensor layout, it is impossible to design sufficient test points, sensors and built-in test (BIT) for all the failure modes identified. Therefore, there are still many failure fuzzy groups for the failure modes of the space station scientific experiment cabinet. In addition, most of the loads in the space station scientific experiment cabinet are long-life products, and no degradation-type failure has occurred during the development and test stage and the current on-orbit period, and there is no degradation trend. The effective fault data obtained on the ground is extremely limited, and it is difficult to verify the many failure modes and degradation models of the scientific experiment cabinet, which also poses a challenge to the discovery of early on-orbit failure or degradation signs and accurate fault diagnosis of the space station scientific experiment cabinet.

[0003] The existing fault diagnosis and maintenance decision system for the space station scientific experiment cabinet is mainly supported by the basic database of failure modes and criteria prepared by early technical personnel. When the corresponding engineering parameters or telemetry measurements are abnormal and meet the criterion logic in the basic database, the system reports a fault. This system mainly targets random failure faults with obvious failure phenomena in the scientific experiment cabinet, and cannot identify and accurately judge the failure fuzzy groups and degradation-type failure modes.

[0004] Therefore, there is an urgent need to provide a technical solution to solve the above problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a ground fault management system for a space station scientific experiment cabinet.

[0006] In a first aspect, the present application provides a ground fault management system for a space station scientific experiment cabinet, and the technical scheme of the system is as follows:

[0007] The system comprises a ground fault simulation generation system and a ground fault diagnosis system.

[0008] The ground fault simulation generation system is configured to perform ground fault simulation on the space station scientific experiment cabinet based on a fault sample set of the space station scientific experiment cabinet and ground test data obtained by ground testing the space station scientific experiment cabinet, and generate simulation fault data.

[0009] The ground fault diagnosis system is used for testing and verifying the space station scientific experiment cabinet according to the simulation fault data, the ground test data and on-orbit telemetry data obtained by on-orbit testing of the space station scientific experiment cabinet, so as to diagnose faults of the space station scientific experiment cabinet.

[0010] The space station scientific experiment cabinet ground fault management system has the following advantages:

[0011] The system can better assist in diagnosing faults and making maintenance decisions for the space station scientific experiment cabinet, and provide stronger decision support for astronauts on-orbit maintenance.

[0012] Based on the above scheme, the space station scientific experiment cabinet ground fault management system can be further improved as follows.

[0013] In an optional manner, the ground fault diagnosis system is further used for:

[0014] According to the fault diagnosis result obtained by diagnosing faults of the space station scientific experiment cabinet, it is determined whether to output fault prediction information.

[0015] In an optional manner, the ground fault simulation generation system comprises a fault injection module and a fault generation module.

[0016] The fault injection module is used for determining a fault injection strategy of a target fault injection device according to the fault sample set.

[0017] The fault generation module is used for generating a target fault mode of the space station scientific experiment cabinet based on the fault injection strategy, combining the ground test data and controlling the space station scientific experiment cabinet to perform ground fault simulation according to the target fault mode, and generating the simulation fault data.

[0018] In an optional manner, the fault sample set comprises a physical layer fault, an electrical layer fault and a protocol layer fault.

[0019] In an optional manner, the target fault injection device comprises an FC fault injection device, a 1553 fault injection device, a power supply fault injection device and a probe fault injection device.

[0020] In an optional manner, the ground fault diagnosis system comprises a multi-source heterogeneous data acquisition system and a PHM system analysis and evaluation platform.

[0021] The multi-source heterogeneous data acquisition system is used for acquiring on-orbit telemetry data obtained by on-orbit testing of the space station scientific experiment cabinet.

[0022] The PHM system analysis and evaluation platform is configured to test and verify the space station scientific experiment cabinet according to the simulated fault data, the ground test data and on-orbit telemetry data obtained by on-orbit testing of the space station scientific experiment cabinet, and to diagnose faults of the space station scientific experiment cabinet.

[0023] The PHM system analysis and evaluation platform is further configured to determine whether to output fault prediction information according to a fault diagnosis result obtained by diagnosing faults of the space station scientific experiment cabinet.

[0024] In an optional manner, the PHM system analysis and evaluation platform is specifically configured to:

[0025] The trained fault diagnosis model is used to detect current on-orbit telemetry data of the space station scientific experiment cabinet to obtain a fault diagnosis result.

[0026] In an optional manner, the fault diagnosis result includes a device ID, a model, current data, historical data and manufacturer data of a faulty device.

[0027] In an optional manner, the PHM system analysis and evaluation platform is specifically configured to:

[0028] When the current data in the fault diagnosis result exceeds a preset range, it is determined to output fault prediction information.

[0029] In an optional manner, the fault prediction information includes fault prediction information in the form of text, images or sound and light.

[0030] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings are only used to illustrate the embodiments and are not considered as limitations of the present application. Moreover, the same reference signs are used to represent the same parts throughout the drawings. In the drawings:

[0032] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of a space station scientific experiment cabinet ground fault management system of the present application;

[0033] Figure 2 FIG. 4 is a general structural diagram of a PHM system analysis and evaluation platform;

[0034] Figure 3 FIG. 5 is a business process diagram of the PHM system analysis and evaluation platform. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0036] Figure 1 FIG. 1 shows a schematic structural diagram of an embodiment of a ground fault management system 10 for a space station scientific experiment cabinet provided by the present invention. Figure 1 As shown, the system 10 includes: a ground fault simulation generation system 11 and a ground fault diagnosis system 12;

[0037] The ground fault simulation generation system 11 is used to: perform ground fault simulation on the space station scientific experiment cabinet based on the fault sample set of the space station scientific experiment cabinet and the ground test data obtained by ground testing the space station scientific experiment cabinet to generate simulated fault data.

[0038] Specifically, the ground fault simulation generation system 11 includes a fault injection module 111 and a fault generation module 112 .

[0039] The fault injection module 111 is configured to determine a fault injection strategy for a target fault injection device according to the fault sample set.

[0040] Among them, the fault sample set includes: physical layer faults, electrical layer faults and protocol layer faults. The fault injection module 111 is serially connected to the normal communication transmission line through the target fault injection device, extracts the communication data from the physical line for observation, storage and playback, and injects various faults in real time according to the user-customized strategy. The fault injection module 111 can implement single or combined fault injection in a parallel / serial manner from multiple levels according to the communication link characteristics of the actual environment and according to user definition, and can implement fault injection at the physical layer, electrical layer and protocol layer, and can simulate almost all random / sudden fault phenomena in the actual working environment. The fault injection device is independent of the software and hardware structure of the space station science experiment cabinet, and does not require the space station science experiment cabinet to provide any form of test interface or fault injection interface.

[0041] The target fault injection device can simulate specific fault phenomena at a specific time and replay fault data sequences, providing a stable fault reproduction path for troubleshooting specific system faults. The fault injection device can execute various fault injection strategies according to a predetermined sequence. Target fault injection devices include but are not limited to FC fault injection devices, 1553 fault injection devices, power supply fault injection devices, and probe fault injection devices.

[0042] The fault generation module 112 is configured to generate a target fault mode of the space station scientific experiment cabinet based on the fault injection strategy, combine the ground test data, and control the space station scientific experiment cabinet to perform ground fault simulation according to the target fault mode, and generate the simulation fault data.

[0043] The fault generation module 112 communicates with various signal equipment units through Ethernet, manages and controls fault injection equipment of different signal types, and generates the required fault mode of the space station scientific experiment cabinet. The fault generation module 112 provides standard fault injection configuration functions, including fault injection hardware transmission interface selection, fault injection data setting, fault injection model selection, fault injection mode setting, and the like. The fault generation module 112 can be configured on a server of the main control system and realize fault injection and generation on the tested target through Ethernet. The fault generation module 112 supports graphical fault type configuration and editing through a drag-and-drop method, supports cascading of multiple types of faults and combination and customization of fault strategies. An open fault mode design is provided, and the fault mode is injected into the tested device to generate corresponding faults. The testability design of the tested device is used to judge the testability design capability of the tested device. The fault generation module 112 can edit the corresponding fault mode according to the testability verification test case, support user self-design of fault execution list, fault execution flow, and fault execution condition, automatically perform fault injection operation, provide a basic fault injection library, form a user's unique professional fault library according to the fault mode corresponding to the test test case, and support reuse of fault strategies.

[0044] The ground fault diagnosis system 12 is configured to test and verify the space station scientific experiment cabinet according to the simulation fault data, the ground test data, and in-orbit telemetry data obtained by testing the space station scientific experiment cabinet in orbit, and diagnose faults of the space station scientific experiment cabinet.

[0045] In an optional manner, the ground fault diagnosis system 12 is further configured to:

[0046] According to the fault diagnosis result obtained by diagnosing faults of the space station scientific experiment cabinet, it is determined whether to output fault prediction information.

[0047] Specifically, the ground fault diagnosis system 12 includes a multi-source heterogeneous data acquisition system 121 and a PHM system analysis and evaluation platform 122.

[0048] The multi-source heterogeneous data acquisition system 121 is configured to acquire in-orbit telemetry data obtained by testing the space station scientific experiment cabinet in orbit.

[0049] Among them, the multi-source heterogeneous data acquisition system 121 can collect on-orbit telemetry data, support multi-cycle type, high-bandwidth signal acquisition, as well as data analysis and preprocessing, support the measurement of dynamic signals such as vibration, pressure, speed, current harmonics, temperature, etc., support multiple bus data acquisition and data preprocessing, and can provide the required data input for the PHM system analysis and evaluation platform 122.

[0050] It should be noted that during on-orbit operation, in order to obtain its internal operating status and provide real-time data for the remote control object, the sensors in the space station telemetry system sense the measured data and convert them into electrical signals. After the various signals are combined according to a certain system, they are transmitted to the ground telemetry equipment (including receivers, antennas, and branch demodulators, etc.) using radio communication technology. The ground equipment uses signal demodulation technology to restore the original parameter information of each channel, and store and display it. The parameter information obtained in this case is on-orbit telemetry data.

[0051] The PHM system analysis and evaluation platform 122 is used to test and verify the space station science experiment cabinet based on the simulated fault data, the ground test data, and the on-orbit telemetry data obtained from the on-orbit test of the space station science experiment cabinet, so as to perform fault diagnosis on the space station science experiment cabinet.

[0052] The PHM system analysis and evaluation platform 122 is further configured to determine whether to output fault prediction information based on a fault diagnosis result obtained by performing fault diagnosis on the space station scientific experiment cabinet.

[0053] Among them, such as Figure 2 and Figure 3 As shown, the PHM system analysis and evaluation platform 122 operates on a project-by-project basis. Users establish a project for the space station science experiment cabinet based on the actual composition of the space station science experiment cabinet, combining a single set of experiment cabinet equipment systems with matching data structures, fault trees, fault modes, weights, and other related data and functions with strong coupling, completing the technical data maintenance and preservation of the experiment cabinet equipment. The saved historical projects can be reused or edited later. After the project is established, information such as the equipment composition, the fault modes it has, and the weights of each sub-node can be displayed. If the evaluation and prediction functions of the experiment cabinet are to be realized through the project, one or more fault diagnosis tasks, evaluation tasks, and prediction tasks can be established. The tasks can perform fault diagnosis, evaluation, and prediction tasks of different granularity for different fault tree nodes and equipment tree nodes.

[0054] Regarding the PHM system analysis and evaluation platform 122, the following points need to be explained:

[0055] 1) PHM system analysis and evaluation platform 122 has a basic algorithm model library including data preprocessing, fault diagnosis, state evaluation, fault prediction, etc. It can quickly implement typical fault prediction models: after entering basic data such as equipment, parameters, and fault modes, etc., and after algorithm model training, different types of tasks such as fault diagnosis tasks, state evaluation tasks, and fault prediction tasks can be created or executed. Each task is based on equipment, uses input parameters according to different algorithm models, and outputs task execution results to complete health management functions.

[0056] 2) PHM system analysis and evaluation platform 122 supports PHM index allocation methods considering different weights and criteria, and supports index allocation of complex systems at different levels: index allocation of system state at different levels, setting weight parameters between and within levels according to the influence of each level on system state, and establishing PHM index allocation method of system according to different weights of each equipment.

[0057] 3) PHM system analysis and evaluation platform 122 has the ability of algorithm management and data management, and has the ability of data persistence and visualization in the whole life cycle of the model: data management function is responsible for collecting online or post-task data and performing basic processing on the data. If necessary, format conversion may be required to enable it to be imported into the health management task and parsed. For raw data and processed parsed data, task output data, etc., visualization display is provided.

[0058] 4) PHM system analysis and evaluation platform 122 supports the establishment of graphical block diagrams of system functions, and visualizes the overall function module architecture of the system: the experimental cabinet equipment management function can effectively supervise, maintain and manage the experimental cabinet and its related equipment. It includes device addition and identification. Users can register new experimental cabinet equipment in the system and assign a unique identifier to each device. Basic information such as device model, device name, and manufacturer name can be recorded. Historical data of the device can be stored, including sensor data and device data. Unwanted devices can be edited and deleted.

[0059] 5) PHM system analysis and evaluation platform 122 has visual design of algorithm model, supports graphical algorithm modeling and programming, and can complete scheme design and algorithm modeling in the form of graphical drag and drop, and complete design and implementation of data preprocessing, feature extraction, diagnosis, and prediction algorithms: several basic algorithms are pre-installed in the initial system, and the function of adding new algorithms is also provided. It has visual design of algorithm model, supports graphical algorithm modeling and programming, and can complete algorithm selection, data time range setting, prediction day setting, etc. in the form of graphical drag and drop. After completion, it is named and saved.

[0060] 6) PHM system analysis and evaluation platform 122 has case management capability of fault diagnosis and prediction model: it has management capability of fault diagnosis and prediction model, when the required algorithm model is similar to a certain historical algorithm model, the previous algorithm model can be reused. First, the algorithm can be queried by name, time and other attributes, after selection and reuse, the project will be exhibited in the complete state of the last saved, and the user can modify the name, parameter and other attributes according to the actual situation, and save it again to complete the reuse process.

[0061] 7) PHM system analysis and evaluation platform 122 has the ability to visualize related data, supports scatter plot, pie chart, column chart, radar chart and other interactive visualization methods, supports multi-cycle type, high-bandwidth signal acquisition, and data analysis and preprocessing: the system monitors all device parameters in real time, and gives an alarm when the value exceeds the pre-set threshold; after selecting a device in the device tree, the data monitoring length and interval of the device can be set, the parameters bound to the device are given, and the data is displayed in a graphical way, and the variance, maximum and minimum values of the parameters can be calculated in real time.

[0062] 8) PHM system analysis and evaluation platform 122 has fault sample sampling function, supports fault mode storage and other management functions, and supports fault mode maintenance function: fault sample management can classify and label the stored sample information, which is convenient for users to quickly search and analyze in the later stage. After starting the task, the device can be predicted based on the fault mode and sample, and when the experimental cabinet state similar to the fault sample appears, the system can show the abnormal state of the experimental cabinet to the device in the task. With the improvement of fault mode and accumulation of fault data, the definition of fault mode and sample management can be continuously improved to improve the accuracy of fault diagnosis.

[0063] In an optional mode, the PHM system analysis and evaluation platform 122 is specifically used for:

[0064] Using the trained fault diagnosis model to detect the current on-orbit telemetry data of the space station scientific experiment cabinet to obtain a fault diagnosis result.

[0065] The fault diagnosis result includes: device ID, model, current data, historical data, and manufacturer data of the fault device.

[0066] In an optional mode, the PHM system analysis and evaluation platform 122 is specifically used for:

[0067] When the current data in the fault diagnosis result exceeds the preset range, the fault prediction information is determined to be output.

[0068] The fault prediction information includes fault prediction information in the form of text, fault prediction information in the form of image, fault prediction information in the form of sound and light, and other types of fault prediction information, which are not limited herein.

[0069] The technical scheme of the embodiment provides strong support for on-orbit fault diagnosis and maintenance decision of the space station scientific experiment cabinet. The embodiment tests and verifies the fault criterion by simulating the fault modes of each scientific experiment cabinet on the ground, especially the fuzzy fault groups and degradation faults, accumulates effective fault data, and can provide decision support for fault diagnosis and prediction of the scientific experiment cabinet in the on-orbit operation stage, and for the development and verification of the maintenance scheme.

[0070] The technical scheme of the embodiment can better support the test verification of the existing testability design and health management design of the scientific experiment cabinet, and provide data support for the testability design and health management design of the subsequent scientific experiment cabinet upgrade. During the development and construction stage of the scientific experiment cabinet, many testability designs and health management designs are carried out, such as BIT, alarm system and health management functions. Due to the limited fault data in the development stage, many designs and functions have not been fully verified in practice. The embodiment uses product design characteristics and actual test data to verify the correctness of the testability design and health management design of the experiment cabinet through the fault diagnosis model, the fault prediction model, and the fault data generated by the ground fault simulation generation system. Through verification, data support can be provided for the testability design and health management design of the subsequent scientific experiment cabinet upgrade.

[0071] The technical scheme of the embodiment can be used to explore the fault diagnosis and health management method of the space station scientific experiment cabinet. Since the actual number of faults is very small since the construction of the space station, it is difficult to form a usable effective fault data set, which has hindered and challenged the development of fault diagnosis and health management of each scientific experiment cabinet of the space station. The embodiment can simulate each fault mode of the scientific experiment cabinet on the ground to form a usable fault data set, and combine test data and downlink telemetry data to carry out fault diagnosis and health management by the PHM system simulation analysis platform of the ground fault diagnosis and prediction system. According to the fault type and data type, the appropriate fault diagnosis method can be selected, so as to obtain a more efficient fault diagnosis and health management method of the space station scientific experiment cabinet.

[0072] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In other instances, well-known methods, structures and techniques have not been described in detail in order to avoid obscuring the description. Similarly, while operations are presented in the description in a particular order, it should be understood that such ordering is illustrative only and one skilled in the art will recognize that ordering can commutatively vary without departing from the scope of the application. Accordingly, the particular order of operations set forth in the examples is not an limitation. Also, well-known structures have not been described in detail since they would be

[0073] It is to be noticed that the above-mentioned embodiments illustrate rather than limit the application, and that one skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices, apparatuses or means can be listed, comprising means for carrying out a certain task. The use of the term'means' in a claim is intended to refer to a combination of means for performing a task, even if such means are not explicitly recited in the claim. The word 'first','second', 'third', etc. do not imply any order. The terms 'first','second', 'third', etc. are to be interpreted as names. The steps of any of the methods disclosed herein do not have to be performed in the exact order disclosed. The use of 'a' or 'the' are not intended to be limiting.

Claims

1. A ground fault management system for a space station scientific experiment cabinet, characterized in that: include: Ground fault simulation generation system and ground fault diagnosis system; The ground fault simulation generation system is used to: perform ground fault simulation on the space station scientific experiment cabinet based on the fault sample set of the space station scientific experiment cabinet and the ground test data obtained by performing ground test on the space station scientific experiment cabinet to generate simulated fault data; The ground fault diagnosis system is used to test and verify the space station scientific experiment cabinet based on the simulated fault data, the ground test data, and the on-orbit telemetry data obtained by the on-orbit test of the space station scientific experiment cabinet, so as to perform fault diagnosis on the space station scientific experiment cabinet; The ground fault simulation generation system includes: a fault injection module and a fault generation module; The fault injection module is used to determine a fault injection strategy for a target fault injection device based on the fault sample set; the fault sample set includes physical layer faults, electrical layer faults, and protocol layer faults; The fault injection module is further configured to: serially access a normal communication transmission line through a target fault injection device, extract communication data from the physical line for observation, storage, and playback, and inject various faults in real time according to user-customized strategies; The fault generation module is used to: generate a target fault mode of the space station scientific experiment cabinet based on the fault injection strategy, combine the ground test data and control the space station scientific experiment cabinet to perform ground fault simulation according to the target fault mode to generate the simulated fault data; The fault generation module is also used to communicate with various signal equipment units via Ethernet, manage and control fault injection devices of different signal types, and generate the fault mode required by the space station scientific experiment cabinet.

2. The ground fault management system for space station scientific experiment cabinets according to claim 1, characterized in that: The ground fault diagnosis system is also used for: According to the fault diagnosis result obtained by performing fault diagnosis on the space station scientific experiment cabinet, it is determined whether to output fault prediction information.

3. The ground fault management system for a space station scientific experiment cabinet according to claim 1, characterized in that: The target fault injection devices include: FC fault injection devices, 1553 fault injection devices, power supply fault injection devices, and probe fault injection devices.

4. The ground fault management system for space station scientific experiment cabinets according to claim 2, characterized in that: The ground fault diagnosis system includes: a multi-source heterogeneous data acquisition system and a PHM system analysis and evaluation platform; The multi-source heterogeneous data acquisition system is used to: acquire on-orbit telemetry data obtained by on-orbit testing of the space station scientific experiment cabinet; The PHM system analysis and evaluation platform is used to test and verify the space station science experiment cabinet based on the simulated fault data, the ground test data, and the on-orbit telemetry data obtained by the on-orbit test of the space station science experiment cabinet, so as to perform fault diagnosis on the space station science experiment cabinet; The PHM system analysis and evaluation platform is further used to determine whether to output fault prediction information based on the fault diagnosis results obtained by performing fault diagnosis on the space station scientific experiment cabinet.

5. The ground fault management system for space station scientific experiment cabinets according to claim 4 is characterized in that: The PHM system analysis and evaluation platform is specifically used for: The trained fault diagnosis model is used to detect the current on-orbit telemetry data of the space station scientific experiment cabinet to obtain a fault diagnosis result.

6. The ground fault management system for space station scientific experiment cabinets according to claim 5, characterized in that: The fault diagnosis result includes: device ID, model, current data, historical data, and manufacturer data of the faulty device.

7. The ground fault management system for space station scientific experiment cabinets according to claim 6, characterized in that: The PHM system analysis and evaluation platform is specifically used for: When the current data in the fault diagnosis result exceeds a preset range, it is determined to output fault prediction information.

8. The ground fault management system for a space station scientific experiment cabinet according to any one of claims 4 to 7, characterized in that: The fault prediction information includes: fault prediction information in text form, fault prediction information in image form, and fault prediction information in sound and light form.

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