Intelligent flexible vibration environment simulation experiment method and related equipment

Abstract

The embodiment of the present invention provides an intelligent flexible vibration environment simulation experiment method and related equipment, belonging to the field of vibration environment simulation technology, including: by collecting vibration test data of different industries and different types of equipment, and classifying and summarizing based on statistical analysis methods, ensuring that the vibration test system can cover a variety of equipment types, meet a wide range of test needs, extracting the commonalities and individual characteristics of equipment vibration characteristics, helping to build an accurate equipment vibration test demand model, improving the pertinence of test plans and the reliability of experimental data, using a distributed intelligent database architecture to achieve efficient storage, management and query of cross-industry equipment vibration data, ensuring that the system can quickly retrieve and call historical experimental data, improving data sharing and reuse capabilities, breaking through the limitations of traditional vibration test methods, and realizing a flexible vibration environment simulation experiment method with strong versatility, high adaptability and strong data processing capabilities.

Description

Technical Field

[0001] The invention relates to the technical field of vibration environment simulation, and in particular to an intelligent flexible vibration environment simulation experiment method and related equipment. Background Art

[0002] Equipment from different industries, such as tracked vehicles, box cargo, helicopters, etc., are often in intense vibration working environments. For example, tracked vehicles often need to travel on rough roads, which will produce strong vibration excitation on the walking system, on-board equipment, etc.; box cargo needs to face complex vibration impact load excitation environment during transportation, and it is necessary to ensure that the structure of the box and cargo and various components are not damaged in this environment; helicopters will also produce strong vibrations when hovering, flying, accelerating, tilting, etc. at a safe height or on the runway, or landing. Based on the above, in order to ensure that these equipment from different industries can work normally and have high reliability, vibration testing is required before they are officially put into use, especially for the key positions of these equipment.

[0003] The actual measurement of these equipment is the most realistic test method for results and data, such as the road test of tracked vehicles. However, this method has its shortcomings. It requires a large and complex test site, consumes a lot of manpower and material resources, and is difficult to carry out and has high costs. Therefore, in practice, vibration environment simulation experiments are often used, which requires a matching experimental system. However, the existing vibration environment simulation system is basically only applicable to specific or homogeneous objects, such as a helicopter real vibration environment simulation test system disclosed in patent document CN106596023B, including a loading platform component, a stiffness simulation platform and three exciter components; the helicopter simulation test piece is placed on the stiffness simulation platform, and each exciter component is set on the loading platform component and connected to the helicopter simulation test piece respectively; the three exciter components cooperate to provide six forces for the helicopter simulation test piece, and the stiffness simulation platform is used to support the helicopter simulation test piece and provide it with a preset stiffness, which can realize the flight vibration environment simulation of all current models of helicopter cabins.

[0004] The shortcoming of the prior art is that in the field of vibration testing, one system cannot simultaneously meet the vibration testing needs of equipment in different industries. If a separate experimental system is designed for each type of equipment, problems such as high experimental costs cannot be avoided. Therefore, based on this background, it is of great significance to invent a method and system for intelligently guided flexible vibration environment simulation experiments to achieve vibration environment simulation of equipment in multiple different industries with one system. Summary of the invention

[0005] The embodiment of the present invention provides a method for an intelligent and flexible vibration environment simulation experiment, aiming to solve the problem that in the field of vibration testing, one system cannot simultaneously meet the vibration testing requirements of equipment in different industries. If a set of experimental systems is designed separately for each type of equipment, problems such as high experimental costs cannot be avoided. Therefore, based on this background, it is of great significance to invent a method and system for an intelligently guided flexible vibration environment simulation experiment to achieve vibration environment simulation of equipment in multiple different industries with one system.

[0006] In a first aspect, an embodiment of the present invention provides a method for an intelligent flexible vibration environment simulation experiment, the method comprising:

[0007] Collect vibration test data from different industries and types of equipment, and classify the vibration characteristics of different equipment based on statistical analysis methods, identify their common and individual characteristics, and clarify the vibration test requirements of various types of equipment;

[0008] Cluster analysis method is used to analyze the vibration test requirements of equipment in different industries, and the common and individual characteristics of equipment vibration characteristics are extracted;

[0009] Based on the distributed intelligent database architecture, a flexible vibration test database for cross-industry equipment is built to achieve efficient storage, management and call of multi-source heterogeneous vibration data;

[0010] Combine unsupervised learning algorithms to train vibration environment simulation prediction models under different working conditions to explore equipment vibration characteristic patterns and improve the generalization ability of the model;

[0011] Based on the experimental scheme recommended by the system and the experimental data of similar equipment in history, combined with the test requirements of the current equipment, the flexible vibration test database is searched to match the optimal experimental scheme and parameter settings that meet the current test conditions;

[0012] Based on the matching calculation results, the test scheme that best matches the vibration characteristics of the current equipment is selected first, and the experimental recommendation model, historical experimental data and the operating conditions of the current equipment are integrated to comprehensively optimize the experimental configuration;

[0013] Based on the optimized test plan, hardware components are selected, a highly adaptable vibration test system for the target equipment is built, and experiments are carried out.

[0014] Optionally, one or more signal processing methods including wavelet transform, Fourier transform or empirical mode decomposition are used to denoise the original vibration data, and one or more methods including normalization, standardization and principal component analysis are used to improve the consistency and comparability of the vibration data. Regression analysis methods are used to establish a mathematical model of vibration test data of different equipment to optimize data prediction capabilities.

[0015] Optionally, a NoSQL database can be used to store and manage vibration test data from different equipment to ensure efficient data storage and retrieval, and to establish a data index and label system so that test data can be classified and managed by industry category, equipment type, operating conditions, and other dimensions.

[0016] Optionally, determine the required vibration excitation equipment according to the experimental plan, including hydraulic exciter, electromagnetic exciter or mechanical exciter, select the appropriate sensor type, including accelerometer, pressure sensor, temperature sensor, etc., and deploy them at key test points, adopt modular interface design, realize flexible combination of hardware equipment, and accurately install the test system based on wireless positioning technology, combine hardware components with vibration test system to conduct vibration environment simulation experiments and obtain experimental data.

[0017] Optionally, the hardware components include a control terminal, which is composed of a signal receiver, a servo controller, a real-time control computer and a main control computer, and integrates special monitoring software to achieve efficient management and precise control of the system. The main control computer is responsible for system task management and has monitoring, control, data analysis and experimental process optimization. The monitoring software supports the hydraulic exciter to achieve single-degree-of-freedom multi-mode vibration excitation in the vertical direction, including random vibration, sinusoidal vibration, impact response and road spectrum simulation, and has high-precision real-time acquisition, data storage and visual curve drawing functions of various sensor signals to ensure dynamic monitoring and intelligent analysis of experimental data.

[0018] Optionally, the sensor is fixed to the key test point of the experimental object, collects vibration data in real time and transmits it to a multi-channel signal receiver via a signal link. The latter collects the measurement signals in parallel and transmits them to the main control computer. The monitoring software processes the data in real time and displays it visually, and generates a vibration drive signal according to the experimental requirements.

[0019] Optionally, the monitoring software can process the data in real time and generate vibration drive signals according to the experimental requirements. The real-time control computer can transmit the signals to the servo controller after conditioning, and the hardware components can be precisely controlled to ensure stable operation of the system and high-precision vibration simulation.

[0020] In the second aspect, the vibration environment simulation experimental device comprises:

[0021] A basic platform, wherein the basic platform is a cast iron T-slot platform with concrete as the foundation;

[0022] The vibration excitation module is composed of multiple hydraulic exciters and integrates transitional vibration modules of various structural forms. It is also equipped with auxiliary systems such as hydraulic oil pipes and hydraulic stations to meet the vibration excitation requirements in different experimental scenarios.

[0023] Positioning module, the positioning module adopts wireless positioning base station and active radio frequency identification technology, and the active radio frequency tag is fixedly installed on the hydraulic exciter to realize accurate position information collection and dynamic adjustment;

[0024] The sensor is arranged at the key test points of the equipment under test and is connected to the control terminal through a wired signal link to achieve high-precision collection and real-time transmission of vibration data.

[0025] The third aspect includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps in the method of intelligent flexible vibration environment simulation experiment when executing the computer program.

[0026] In a fourth aspect, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the method of an intelligent flexible vibration environment simulation experiment are implemented.

[0027] In summary, the beneficial effects of the present invention are:

[0028] By collecting vibration test data from different industries and different types of equipment, and classifying and summarizing them based on statistical analysis methods, we ensure that the vibration test system can cover a variety of equipment types and meet a wide range of test needs. The common and individual characteristics of equipment vibration characteristics can be extracted, which is helpful to build an accurate equipment vibration test demand model, improve the pertinence of test plans and the reliability of experimental data, and use the NoSQL distributed intelligent database architecture to achieve efficient storage, management and query of cross-industry equipment vibration data, ensure that the system can quickly retrieve and call historical experimental data, improve data sharing and reuse capabilities, break through the limitations of traditional vibration test methods, and realize an intelligent and flexible vibration environment simulation experiment method with strong versatility, high adaptability and strong data processing capabilities. It is suitable for the vibration test needs of equipment in different industries, can effectively improve the intelligence of the test system and experimental efficiency, reduce experimental costs, and ensure the accuracy and reliability of experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a flow chart of a method for an intelligent and flexible vibration environment simulation experiment provided by an embodiment of the present invention.

[0031] Figure 2 It is a hardware connection diagram of the intelligent flexible vibration environment simulation experimental device provided in an embodiment of the present invention.

[0032] Figure 3 Schematic diagram of a hydraulic vibrator and a cast iron T-slot platform provided in an embodiment of the present invention.

[0033] Figure 4 It is a schematic diagram of the structure of embodiment 1 of the present invention.

[0034] Figure 5 It is a schematic diagram of the structure of embodiment 2 of the present invention.

[0035] Figure 6 It is a structural diagram of embodiment 3 of the present invention.

[0036] Figure 7 It is a schematic diagram of the structure of embodiment 4 of the present invention.

[0037] Figure numerals: 1. Hydraulic vibrator; 2. Vibration wheel; 3. Rotating shaft; 4. Triangle bracket; 5. Guide rail; 6. Guide block; 7. Sensor; 8. Basic platform; 9. Road wheel; 10. Single-hole support seat; 11. Multi-hole support seat; 12. Load-bearing plate; 13. Intermediate load-bearing plate; 14. Limit block; 15. Load-bearing plate; 16. Packing box; 17. Goods; 18. Connecting plate; 19. Torsion bar; 20. Ball joint connecting rod; 21. Ball joint; 22. Plate body; 23. Fixed block; 24. Vibration table; 25. Vibration tray; 26. Waist-shaped groove; 27. Cast iron T-slot platform. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-3 As shown, Figure 1 1 is a flow chart of a method for a flexible vibration environment simulation experiment provided by an embodiment of the present invention. The method for a flexible vibration environment simulation experiment comprises the following steps:

[0040] Vibration test data is collected from different industries and different types of equipment, wherein the vibration test data refers to the equipment vibration response information collected by the sensor 7 under different working conditions, including frequency, amplitude, acceleration, impact load and other data. Different equipment is classified according to their commonality and individuality characteristics according to the statistical analysis method and the specific requirements of their vibration test are clarified. The statistical analysis method refers to the mathematical method used to process and analyze experimental data, including mean analysis, standard deviation calculation, correlation analysis, etc., to help identify the commonality and individuality of the vibration characteristics of different equipment;

[0041] The vibration test requirements of equipment in different industries are studied, and the common and individual characteristics of the vibration test requirements of equipment in different industries are analyzed through cluster analysis, such as purpose, conditions, equipment type, data characteristics, etc.; common characteristics refer to frequency domain characteristics and time domain characteristics, and individual characteristics refer to the unique vibration characteristics of a specific equipment or under specific working conditions, such as unique vibration modes caused by structural or material differences.

[0042] Collect vibration test data from different industries and different types of equipment, and classify the vibration characteristics of different equipment based on statistical analysis methods, identify their common characteristics and personalized characteristics, and clarify the vibration test requirements of various types of equipment. Vibration test data includes frequency, amplitude, acceleration, temperature, load, etc.

[0043] Cluster analysis is used to analyze the vibration test requirements of equipment in different industries and extract the common and individual characteristics of equipment vibration characteristics. Furthermore, cluster analysis refers to an unsupervised learning algorithm that is mainly used to classify data and divide equipment with similar vibration characteristics into different categories in order to study their common and individual characteristics.

[0044] Based on the distributed intelligent database architecture, a flexible vibration test database for cross-industry equipment is constructed to achieve efficient storage, management and call of multi-source heterogeneous vibration data; further, the flexible vibration test database refers to a dynamic and scalable database system that is specifically used to store and manage vibration test data of different equipment, and can provide matching experimental plans and test parameters according to needs.

[0045] Combined with unsupervised learning algorithms, the vibration environment simulation prediction model under different working conditions is trained to explore the equipment vibration characteristic patterns and improve the generalization ability of the model; further, unsupervised learning algorithm refers to a method in machine learning that does not rely on manually labeled data, but instead automatically analyzes the inherent structure of the data for classification or pattern recognition, such as autoencoders, cluster analysis (K-means), generative adversarial networks (GAN), etc.

[0046] Based on the experimental scheme recommended by the system and the experimental data of similar equipment in history, combined with the test requirements of the current equipment, the flexible vibration test database is searched to match the optimal experimental scheme and parameter settings that meet the current test conditions;

[0047] Based on the matching calculation results, the test scheme that best matches the vibration characteristics of the current equipment is selected first, and the experimental recommendation model, historical experimental data and the operating conditions of the current equipment are integrated to comprehensively optimize the experimental configuration;

[0048] Based on the optimized test plan, hardware components are selected, a highly adaptable vibration test system for the target equipment is built, and experiments are carried out.

[0049] In this embodiment, one or more signal processing methods such as wavelet transform, Fourier transform or empirical mode decomposition are used to denoise the original vibration data, and one or more methods such as normalization, standardization and principal component analysis are used to improve the consistency and comparability of the vibration data. A regression analysis method is used to establish a mathematical model of vibration test data of different equipment to optimize data prediction capabilities, wherein signal denoising refers to removing unnecessary noise components from the signal and retaining useful signals, and normalization is a method in data processing that linearly transforms the data so that the data value falls within a specific range, usually between 0 and 1. Normalization is often used to make data at a uniform scale to avoid the influence of data of different scales on the analysis results.

[0050] In this embodiment, a NoSQL database is used to store and manage vibration test data from different equipment to ensure efficient data storage and retrieval, and a data index and label system is established so that test data can be classified and managed by industry category, equipment type, working condition, etc., where NoSQL database refers to a non-relational database. Unlike traditional relational databases (such as MySQL and Oracle), NoSQL database does not rely on tables and relational models to store data. It is usually used to process large-scale data sets, especially for requirements with non-fixed structures or high scalability.

[0051] In this embodiment, the required vibration excitation equipment is determined according to the experimental plan, including a hydraulic vibrator 1, an electromagnetic vibrator or a mechanical vibrator, and the suitable sensor 7 type is selected, including an acceleration sensor, a pressure sensor, a temperature sensor, etc., and arranged at key test points. A modular interface design is adopted to achieve a flexible combination of hardware equipment, and the test system is accurately installed based on wireless positioning technology. The hardware components are combined with the vibration test system to carry out a vibration environment simulation experiment and obtain experimental data.

[0052] In this embodiment, the hardware components include a control terminal, which is composed of a signal receiver, a servo controller, a real-time control computer and a main control computer, and integrates special monitoring software to achieve efficient management and precise control of the system. The main control computer is responsible for system task management and has monitoring, control, data analysis and experimental process optimization. The monitoring software supports the hydraulic exciter 1 to achieve single-degree-of-freedom multi-mode vibration excitation in the vertical direction, including random vibration, sinusoidal vibration, impact response and road spectrum simulation, and has high-precision real-time acquisition, data storage and visualization curve drawing functions of various sensor signals to ensure dynamic monitoring and intelligent analysis of experimental data. Among them, random vibration refers to the random change of frequency and amplitude of the vibration signal, which is usually used to simulate random interference in the natural environment. String vibration is a periodic vibration with a constant vibration frequency, which is usually used to test the frequency response of the system. The impact response tests the reaction of the equipment to the impact through short-term large-amplitude impact excitation. The road spectrum simulation is used to simulate the vibration characteristics of the vehicle during driving, and is usually adjusted according to different road conditions.

[0053] In this embodiment, the sensor 7 is fixed at the key test point of the experimental object, collects vibration data in real time and transmits it to the multi-channel signal receiver via the signal link. The latter collects the measurement signals in parallel and transmits them to the main control computer. The monitoring software processes the data in real time and displays it visually, and generates a vibration driving signal according to the experimental requirements.

[0054] In this embodiment, data is processed in real time based on monitoring software, and a vibration drive signal is generated according to experimental requirements, and then transmitted to the servo controller after real-time control computer conditioning, so as to accurately control the hardware components and ensure stable operation of the system and high-precision vibration simulation.

[0055] See also Figure 4 In this embodiment 1, the hydraulic exciter 1 is used to provide vibration excitation in the vertical direction to simulate the vibration and impact load generated on the walking system when the vehicle is driving on a rough road. The transition excitation module is mainly composed of an exciting wheel 2, a rotating shaft 3, a triangular bracket 4, a guide rail 5 and a guide block 6. Each load-bearing wheel 9 is correspondingly configured with a set of hydraulic exciters 1 and a corresponding transition excitation module to ensure accurate dynamic excitation of the vehicle's walking system.

[0056] The test module uses acceleration sensors 7 as measuring elements and arranges them at the balance elbows corresponding to each road wheel 9, the lower track and key measuring points inside and outside the vehicle body to obtain vibration response data of different parts and realize high-precision testing of vehicle vibration characteristics and impact load distribution.

[0057] First, determine the category of the current equipment, which is a tracked multi-axle vehicle, and analyze its vibration test requirements, including test objectives, working conditions, applicable equipment types, and data characteristics. Then, enter the flexible vibration test database, select the corresponding category of tracked multi-axle vehicles, retrieve the test schemes and parameter information that match the test requirements, and prioritize the test schemes that match the current equipment based on the matching degree. On this basis, combine the experimental schemes recommended by the system, the experimental schemes of similar equipment in the past, and the actual test environment of the current equipment to formulate a specific test plan for the vehicle, including loading methods, excitation strategies, and test points, and clarify the number, combination form, and relative position of the hydraulic exciter 1, the structural composition and assembly relationship of the transition excitation module, and the type, quantity, and layout of the required sensors 7, and complete the selection of hardware equipment accordingly.

[0058] Subsequently, the positioning module is started, and the active RFID tag on the hydraulic vibrator 1 sends an RFID signal to the positioning base station. The positioning base station analyzes the RFID signal to calculate the real-time position of the active RFID tag, thereby realizing the precise positioning of the hydraulic vibrator 1. Under the guidance of positioning, the hydraulic vibrator 1 is moved to the designated workstation on the base platform 8 and fixedly installed using lifting equipment such as electric hoists and overhead cranes. After all the transition excitation modules are assembled, they are hoisted as a whole onto the excitation table 24 of each hydraulic vibrator 1, and modular docking is achieved through standardized interfaces. Subsequently, the vehicle is hoisted onto the excitation module, and its position is precisely adjusted so that the central axis of the road wheel 9 is aligned with the central axis of the excitation wheel 2 as much as possible to ensure the accuracy of the excitation loading. After the equipment is installed, sensors 7 are installed at key measuring points such as the balance elbow, tracks, and inside and outside of the vehicle body of the tracked vehicle, and connected to the corresponding signal acquisition interface of the control terminal. Finally, the hydraulic station and the hydraulic vibrator 1 are connected through the oil pipe. After completing the system safety protection measures, the hydraulic vibrator 1 is connected to the control terminal, and the experimental conditions such as vibration excitation parameters and input signals are set. The experiment is started and the vibration test data is obtained in real time.

[0059] See also Figure 5 In Example 2, a solution for a road simulation experiment of a small civilian crawler unmanned vehicle is provided. This vehicle is a crawler multi-axle vehicle like the crawler fire rescue vehicle described in the example, but because the wheelbase of its road wheels 9 is smaller than the minimum centering distance of the hydraulic exciter 1, the excitation strategy of the example cannot be used. For this vehicle, the first, middle and last pairs of road wheels 9 are used as excitation points, and the bearing plate 12 is used to support its walking system, and the bearing plate 12 is driven by the hydraulic exciter 1 to displace and pitch in the vertical direction to simulate the road excitation during the vehicle's driving process.

[0060] This embodiment uses three hydraulic vibrators 1 arranged in a group in a colinear manner, and two groups are arranged symmetrically, with a total of six hydraulic vibrators 1 providing vertical excitation. In order to avoid spatial interference of the hydraulic station connecting the oil pipe, each group of centrally arranged hydraulic vibrators 1 is installed with a certain angle rotated compared to the other vibrators. The transition excitation module consists of a rotating shaft 3, a guide rail 5, a guide block 6, a single-hole support seat 10, a multi-hole support seat 11, a bearing plate 12, an intermediate bearing plate 13 and a limit block 14 to meet the specific excitation requirements of the vehicle.

[0061] To switch from Example 1 to this example, it is only necessary to adjust the number of hydraulic exciters 1 to 6 and optimize their arrangement, replace some transition excitation module components, adjust the number and type of sensors 7, and reset experimental parameters such as the input signal of the hydraulic exciter 1.

[0062] Similar to Example 1, combined with the experimental scheme recommended by the system, the historical experimental data of similar equipment and the actual test environment of the current equipment, the test scheme is selected from the flexible vibration test database, a specific test scheme for the vehicle is formulated, and the hardware selection is completed accordingly. Subsequently, the positioning module is started, and the hydraulic vibrator 1 is installed to the specified position of the base platform 8 using wireless positioning technology and lifting equipment, and the integration with the transition excitation module is completed. The vehicle is then hoisted onto the transition excitation module, and its position is accurately adjusted so that the center axis of the first pair, the middle and the last pair of road wheels 9 is directly opposite to the center axis of the hydraulic vibrator 1. Each selected sensor 7 is installed in turn to the measuring points inside and outside the balance elbow, crawler and vehicle body, and connected to the corresponding signal acquisition interface of the control terminal to complete the oil pipe connection between the hydraulic station and the hydraulic vibrator 1. After completing the safety protection measures, the hydraulic vibrator 1 is connected to the control terminal, and the vibration excitation parameters and input signals are set to start the experiment.

[0063] During the experiment, the excitation cylinder applies a vertical vibration load to the excitation tray 25 according to the input excitation signal, and each hydraulic vibrator 1 independently applies excitations of different amplitudes and phases according to the preset excitation sequence, so that a height difference is formed between each excitation tray 25, thereby driving the load-bearing plate 12 to produce a pitch motion around the rotating shaft 3. At the same time, the guide rail 5 combined with the single-hole support seat 10 is driven by the load-bearing plate 12 to achieve longitudinal sliding and complete decoupling through the sliding pair formed by the guide rail 5 and the guide block 6. The porous support seat 11 is connected to support the middle load-bearing plate 13 through the rotating shaft 3. The middle load-bearing plate 13 is specifically used to carry the middle road wheel 9 of the vehicle and effectively transmit the excitation of the middle hydraulic vibrator 1 to achieve dynamic response simulation of the vehicle under different road vibration environments. Furthermore, a waist-shaped groove 26 is provided on the top of the excitation tray 25.

[0064] See also Figure 6In this embodiment 3, a scheme for simulating the vibration environment of the container cargo 17 under road transportation conditions is provided. Two hydraulic vibrators 1 providing vertical vibration excitation are arranged front and back and arranged along the same straight line to simulate the dynamic excitation of the front and rear wheels on the container during the driving of the transport vehicle. The transition excitation module is mainly composed of a load-bearing plate 12, a rotating shaft 3, a support seat, a guide rail 5 and a guide block 6.

[0065] The flexible switching of the experimental system only requires reducing the number of hydraulic exciters 1 to 2, adjusting the configuration of some components of the transition excitation module, optimizing the number and type of sensors 7, and resetting the parameters such as the input signal of the hydraulic exciter 1. If switching from Example 2 to this embodiment, it is only necessary to replace the load-bearing plate 12 in the transition excitation module with a longer and wider load-bearing plate 15, and the remaining components, including the rotating shaft 3, the guide rail 5, the guide block 6, the single-hole support seat 10 and the multi-hole support seat 11, can remain universal.

[0066] The present embodiment is different from the previous embodiment in that after the transition excitation module is assembled on the ground, the packaging box 16 is first placed on the load-bearing plate 12, and the threaded holes on the load-bearing plate 12 are connected and fixed with bolts through the through holes on the packaging box 16. Subsequently, the goods 17 are placed in the packaging box 16, and the box lock is fastened to achieve an integrated assembly of the experimental object and the transition excitation module. After the initial assembly is completed, the transition excitation module and the experimental object are hoisted as a whole to the excitation table 24 of the hydraulic exciter 1 using lifting equipment, and precise docking is completed through the interface.

[0067] Afterwards, select an appropriate number of sensors 7 according to the test plan and install them on key parts of the cargo 17 to ensure the comprehensiveness and accuracy of vibration data collection. After installation, connect all sensors 7 to the corresponding signal input ports of the control terminal, and complete the oil pipe connection between the hydraulic station and the hydraulic exciter 1. After the safety protection measures in the experimental area are completed, connect the hydraulic exciter 1 to the control terminal, set the vibration excitation parameters and input signals, and officially start the experiment to obtain vibration test data.

[0068] See also Figure 7 This embodiment 4 provides an experimental scheme for simulating the vibration environment of a civil aviation helicopter. This embodiment adopts a three-point excitation strategy to construct a stable vibration excitation plane through three excitation points to simulate the vibration environment of the helicopter under side flight, landing, climbing and other working conditions.

[0069] Similar to other embodiments, the current equipment category is first identified and its vibration test requirements are analyzed. Then, the test scheme and parameter information matching the requirements are retrieved through the flexible vibration test database, and the test scheme that best suits the current equipment is selected based on the matching degree. Combined with the experimental scheme recommended by the system, the experimental data of similar equipment in history, and the actual test environment of the current equipment, a specific test scheme for the helicopter is selected and formulated, and the hardware configuration of the experimental system is completed accordingly.

[0070] The experimental system uses a hydraulic exciter 1 arranged in an isosceles triangle to ensure stable excitation support. The transition excitation module is composed of a connection mechanism and an excitation table 24, wherein the connection mechanism includes a connection plate 18, multiple torsion bars 19, a ball joint 21 and a ball joint connecting rod 20, forming a multi-degree-of-freedom support structure to adapt to complex vibration conditions. The excitation table 24 is composed of a plate body 22 and a fixing block 23, which is used to stabilize the experimental object and transmit vibration excitation.

[0071] During the experiment, the positioning module is first started, and each hydraulic vibrator 1 is installed and fixed at the designated position of the base platform 8 using wireless positioning technology and lifting equipment. Subsequently, the connection mechanism is assembled with the vibration table 24 and hoisted as a whole onto the vibration tray 25 of the hydraulic vibrator 1 to ensure the accuracy of the mechanical connection. After that, the helicopter is hoisted onto the plate 22, and the helicopter landing gear is firmly connected to the plate 22 using the fixing block 23 to ensure the structural stability during the experiment.

[0072] After the structural assembly is completed, multiple sensors 7 are selected and installed at key measuring points of the helicopter to obtain vibration response data. All sensors 7 are connected to the corresponding signal ports of the control terminal, and the oil pipe connection between the hydraulic station and the hydraulic exciter 1 is completed. Before the experiment begins, a safety protection check is performed to ensure stable operation of the system. Finally, the hydraulic exciter 1 is connected to the control terminal, the vibration excitation parameters and input signals are set, the experiment is started and vibration data is collected to simulate the vibration environment of the helicopter under different working conditions.

[0073] The vibration environment simulation experimental device comprises:

[0074] A basic platform 8, wherein the basic platform 8 is a cast iron T-slot platform 27 with concrete as the foundation;

[0075] The vibration excitation module is composed of a plurality of hydraulic exciters 1 and integrates transitional vibration excitation modules of various structural forms, and is equipped with auxiliary systems such as hydraulic oil pipes and hydraulic stations to meet the vibration excitation requirements in different experimental scenarios;

[0076] Positioning module, the positioning module adopts wireless positioning base station and active radio frequency identification technology, and the active radio frequency tag is fixedly installed on the hydraulic vibrator 1 to realize accurate position information collection and dynamic adjustment;

[0077] The sensor 7 is arranged at the key test points of the equipment under test and is connected to the control terminal through a wired signal link to achieve high-precision collection and real-time transmission of vibration data.

[0078] It should be noted that the electronic device provided by the embodiment of the present invention can be applied to devices such as smart phones, computers, servers, etc. that can perform the method of flexible vibration environment simulation experiment.

[0079] The electronic device provided by the embodiment of the present invention can implement each process implemented by the method for the flexible vibration environment simulation experiment in the above method embodiment, and can achieve the same beneficial effect. To avoid repetition, it will not be described here.

[0080] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method for flexible vibration environment simulation experiment provided by the embodiment of the present invention or the various processes of the method for flexible vibration environment simulation experiment on the application side can be implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0081] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0082] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. An intelligent and flexible vibration environment simulation experiment method, characterized in that: The method comprises the following steps: Collect vibration test data from different industries and different types of equipment, classify the vibration characteristics of different equipment, identify their common characteristics and personalized characteristics. The common characteristics refer to frequency domain characteristics and time domain characteristics, and the personalized characteristics refer to the unique vibration characteristics of a specific equipment or under specific working conditions, and clarify the vibration test requirements of various types of equipment; Analyze the vibration test requirements of equipment in different industries and extract the common and individual characteristics of equipment vibration characteristics; Based on the distributed intelligent database architecture, a flexible vibration test database for cross-industry equipment is built to achieve efficient storage, management and call of multi-source heterogeneous vibration data. The flexible vibration test database refers to a dynamic and scalable database system that is specifically used to store and manage vibration test data of different equipment, and can provide matching experimental plans and test parameters according to needs; Combine unsupervised learning algorithms to train vibration environment simulation prediction models under different working conditions to explore equipment vibration characteristic patterns and improve the generalization ability of the model; Based on the experimental scheme recommended by the system and the experimental data of similar equipment in history, combined with the test requirements of the current equipment, the flexible vibration test database is searched to match the optimal experimental scheme and parameter settings that meet the current test conditions; Based on the matching calculation results, the test scheme that best matches the vibration characteristics of the current equipment is selected first, and the experimental recommendation model, historical experimental data, and the operating conditions of the current equipment are integrated to comprehensively optimize the experimental configuration; Based on the optimized test plan, hardware components are selected, a highly adaptable vibration test system for the target equipment is built, and experiments are carried out.

2. The method for intelligent flexible vibration environment simulation experiment as claimed in claim 1, characterized in that: Use one or more signal processing methods such as wavelet transform, Fourier transform or empirical mode decomposition to denoise the original vibration data. Use one or more methods such as normalization, standardization and principal component analysis to improve the consistency and comparability of vibration data. Use regression analysis to establish a mathematical model for vibration test data of different equipment to optimize data prediction capabilities.

3. The method for intelligent flexible vibration environment simulation experiment as claimed in claim 2, characterized in that: A NoSQL database is used to store and manage vibration test data from different equipment to ensure efficient data storage and retrieval. A data index and labeling system is established so that test data can be classified and managed by industry category, equipment type, and working condition.

4. The method for conducting an intelligent flexible vibration environment simulation experiment as claimed in any one of claims 1 to 3, characterized in that: The hardware components include vibration excitation equipment and sensors. The required vibration excitation equipment is determined according to the experimental plan, including a hydraulic vibrator and an electromagnetic vibrator or a mechanical vibrator. The appropriate sensor types are selected, including acceleration sensors, pressure sensors and temperature sensors, and are arranged at key test points. A modular interface design is adopted to achieve a flexible combination of hardware equipment, and the test system is accurately installed based on wireless positioning technology. The hardware components are combined with the vibration test system to conduct a vibration environment simulation experiment and obtain experimental data.

5. The method for intelligent flexible vibration environment simulation experiment as claimed in claim 3, characterized in that: The hardware components include a control terminal, which consists of a signal receiver, a servo controller, a real-time control computer and a main control computer, and integrates special monitoring software to achieve efficient management and precise control of the system. The main control computer is responsible for system task management and has monitoring, control, data analysis and experimental process optimization. The monitoring software supports the hydraulic exciter to achieve single-degree-of-freedom multi-mode vibration excitation in the vertical direction, including random vibration, sinusoidal vibration, impact response and road spectrum simulation, and has high-precision real-time acquisition of various sensor signals, as well as data storage and visual curve drawing functions to ensure dynamic monitoring and intelligent analysis of experimental data.

6. The method for intelligent flexible vibration environment simulation experiment as claimed in claim 5, characterized in that: The sensor is fixed at the key test point of the experimental object, collects vibration data in real time and transmits it to the multi-channel signal receiver via the signal link. The latter collects the measurement signals in parallel and transmits them to the main control computer. The monitoring software processes the data in real time and displays it visually, and generates vibration driving signals according to the experimental requirements.

7. The method for intelligent flexible vibration environment simulation experiment as claimed in claim 6, characterized in that: The monitoring software processes the data in real time and generates vibration drive signals according to the experimental requirements. The real-time control computer is used to adjust the signals and transmit them to the servo controller, which accurately controls the hardware components to ensure stable operation of the system and high-precision vibration simulation.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps in the method for an intelligent flexible vibration environment simulation experiment as described in any one of claims 1 to 7 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the method for an intelligent flexible vibration environment simulation experiment as claimed in any one of claims 1 to 7 are implemented.

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