Ultra-high level shock response spectrum test method, system, medium, device and terminal

Abstract

The application belongs to the technical field of impact response spectrum test, and discloses a super-high-level impact response spectrum test method, system, medium, equipment and terminal, wherein a super-high-level impact monitoring sensor is installed on a table top of a measured impact response spectrum test device, and the super-high-level impact monitoring sensor is sequentially connected with a signal adapter, a PXI device and a central processing unit by wires; super-high-level impact response spectrum test data is collected and pretreated; a self-defined calibration test signal is recorded to collect a waveform and analyze a super-high-level impact response spectrum test signal; dynamic response data and acceleration response data of the super-high-level impact monitoring sensor are determined; the acceleration response is converted into an impact response spectrum, and the maximum expected environment and the best test experiment condition are determined according to the dynamic response data. The super-high-level impact response spectrum test system has simple structure, low test cost, high safety, and good economic and social benefits.

Description

Technical Field

[0001] This invention belongs to the field of shock response spectrum testing technology, and particularly relates to a method, system, medium, equipment and terminal for ultra-high-level shock response spectrum testing. Background Technology

[0002] Currently, the shock response spectrum tester is an environmental testing equipment used to complete shock response spectrum tests. The shock response spectrum is the analytical basis for implementing shock resistance design of products and is also a basic parameter for shock environment simulation tests in production. In key aerospace research and production projects and related major science and technology projects, shock response spectrum testing has become one of the essential environmental tests.

[0003] Because impact can cause damage and destruction to equipment, it is necessary to study the nature and severity of the impact environment in which the equipment operates, and to conduct environmental simulation experiments to check the equipment's impact resistance and improve its shock resistance. The impact response spectrum is a widely used and important concept in engineering. The International Electrotechnical Commission (IEC), technical committees of the International Organization for Standardization (ISO), and Chinese national standards have all adopted the impact spectrum as one of the methods for specifying impact environments. Therefore, the impact spectrum is the analytical basis for implementing impact-resistant design of equipment and a fundamental parameter for controlling product impact environment simulation experiments. The impact response spectrum reflects environmental characteristics, and by analyzing the impact response spectrum, a basis can be provided for the equipment's impact resistance.

[0004] In recent years, with the increasing understanding of environmental testing, higher requirements have been placed on the simulation of shock environments. Shock response spectrum testing has become a mandatory test item for the factory acceptance of many products. However, shock response spectrum testing has drawbacks such as complex structure, high cost, large space occupation, and difficulty in controlling shock excitation. Therefore, there is an urgent need to design a new ultra-high magnitude shock response spectrum testing method.

[0005] Based on the above analysis, the problems and defects of the existing technology are as follows: the existing test for shock response spectrum test has defects such as complex structure, high cost, large space occupation, and difficulty in controlling shock excitation. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a method, system, medium, equipment, and terminal for testing ultra-high magnitude impact response spectra.

[0007] This invention is implemented as follows: a method for testing ultra-high magnitude impact response spectra, the method comprising the following steps:

[0008] Step 1: Connect the ultra-high magnitude impact response spectrum test device: Install the ultra-high magnitude impact monitoring sensor on the platform of the impact response spectrum test device, and connect the ultra-high magnitude impact monitoring sensor to the signal adapter, PXI device and central processing unit in sequence using wires.

[0009] Step 2: Acquisition and preprocessing of ultra-high-level impact response spectrum test data: The data acquisition module is used to acquire ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data, and the data preprocessing module is used to perform noise reduction and enhancement preprocessing on the acquired data and signal transmission.

[0010] Step 3: Analyze and process the ultra-high magnitude impact response spectrum test signal: Implement custom signal functions through the function generator module and customize the calibration test signal; record the acquired waveforms sequentially through the oscilloscope module, and perform signal reception and analysis and processing of the ultra-high magnitude impact response spectrum test signal;

[0011] Step four: Conduct ultra-high magnitude impact response spectrum testing: Determine the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor; convert the acceleration response into an impact response spectrum, and determine the maximum expected environment and optimal test experimental conditions based on the dynamic response data.

[0012] Furthermore, the ultra-high magnitude impact monitoring sensor in step one is an ultra-high magnitude impact piezoelectric acceleration monitoring sensor.

[0013] Furthermore, the connection method of the ultra-high magnitude impact response spectrum testing device in step one includes:

[0014] The output terminal of the ultra-high magnitude impact monitoring sensor is connected to the input terminal of the signal adapter using a wire. The output terminal of the signal adapter is connected to the input terminal of the PXI device using a wire. The output terminal of the PXI device is connected to the input terminal of the central processing unit using a wire.

[0015] Furthermore, the preprocessing method for the ultra-high magnitude impact response spectrum test data in step two includes:

[0016] (1) The original ultra-high magnitude impact response spectrum test dataset was decomposed using the fully noise-assisted aggregated empirical mode decomposition algorithm to obtain several intrinsic mode function components;

[0017] (2) Perform Pearson correlation analysis on the original test data and several intrinsic mode function components respectively to obtain the correlation coefficient between each intrinsic mode function component and the original test data;

[0018] (3) Extract the features of the ultra-high magnitude impact response spectrum test data based on the correlation coefficient between each intrinsic mode function component and the original test data, and use a bidirectional denoising autoencoder network for denoising.

[0019] Furthermore, the analysis and processing method for the ultra-high magnitude impact response spectrum test signal in step three includes:

[0020] (1) The ultra-high magnitude impact response spectrum calibration test signal is customized by the function generator, the ultra-high magnitude impact response spectrum test waveform is recorded by the oscilloscope module, and the signal is received;

[0021] (2) The amplifier circuit amplifies the received ultra-high level impact response spectrum test signal and outputs the amplified ultra-high level impact response spectrum test signal to the A / D conversion circuit.

[0022] (3) The analog-to-digital conversion signal is output to the central processing unit using the A / D conversion circuit. The central processing unit analyzes and processes the signal and outputs and displays the results.

[0023] Furthermore, the testing method for the ultra-high magnitude impact response spectrum in step four includes:

[0024] (1) Excitation prediction is performed on the ultra-high level impact monitoring sensor, and the finite element prediction method is selected to predict the dynamic response data of the ultra-high level impact monitoring sensor according to the characteristics of the excitation.

[0025] (2) Determine the monitoring point of the ultra-high magnitude impact monitoring sensor, and use the mathematical model prediction method to obtain the acceleration response data of the monitoring point of the ultra-high magnitude impact monitoring sensor;

[0026] (3) Use the recursive digital filtering method to convert the acceleration response of all monitoring points into an impact response spectrum, and determine the maximum expected environment and the best test experimental conditions based on the dynamic response data.

[0027] Another object of the present invention is to provide an ultra-high magnitude impact response spectrum testing system that applies the aforementioned ultra-high magnitude impact response spectrum testing method, the ultra-high magnitude impact response spectrum testing system comprising:

[0028] The data acquisition module, connected to the central control module, is used to acquire ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data through data acquisition equipment.

[0029] The data preprocessing module, connected to the central control module, is used to perform noise reduction and enhancement processing on the acquired ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data through the data preprocessing program.

[0030] The signal transmission module, connected to the central control module, is used to send the pre-processed ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data to the central processor via a wireless communication device.

[0031] The central control module is connected to the data acquisition module, data preprocessing module, signal transmission module, function generator module, oscilloscope module, testing module, and data storage and display module. It is used to coordinate and control the normal operation of each module of the ultra-high magnitude impact response spectrum testing system through the central processor.

[0032] The function generator module, connected to the central control module, is used to implement custom signal functions through the function generator and to customize ultra-high-level impact response spectrum test signals;

[0033] The oscilloscope module, connected to the central control module, is used to record the acquired waveforms sequentially via the oscilloscope, and to receive signals and analyze and process ultra-high-level impact response spectrum test signals.

[0034] The testing module, connected to the central control module, is used to determine the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor; convert the acceleration response into an impact response spectrum; and determine the maximum expected environment and optimal test experimental conditions based on the dynamic response data.

[0035] The data storage and display module, connected to the central control module, is used to store the collected ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data, ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data after noise enhancement processing, custom signal results, signal analysis and processing results, and ultra-high-level impact response spectrum test results through a cloud database server, and display them on a monitor.

[0036] Another object of the present invention is to provide a computer program product stored on a computer-readable medium, comprising a computer-readable program that, when executed on an electronic device, provides a user input interface for applying the steps of the ultra-high magnitude impact response spectrum testing method.

[0037] Another object of the present invention is to provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to apply the steps of the ultra-high magnitude impact response spectrum testing method.

[0038] Another objective of this invention is to provide an information data processing terminal for implementing the ultra-high magnitude impact response spectrum testing system.

[0039] Based on the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solution to be protected by this invention from the following aspects:

[0040] First, addressing the technical problems existing in the prior art and the difficulty in solving them, and closely combining the technical solution to be protected by this invention with the results and data from the research and development process, this paper provides a detailed and in-depth analysis of how the technical solution of this invention solves the technical problems, and the inventive technical effects brought about after solving the problems. The specific description is as follows:

[0041] The ultra-high magnitude impact response spectrum testing method provided by this invention first installs an ultra-high magnitude impact monitoring sensor on the platform of the impact response spectrum test device, and connects the ultra-high magnitude impact monitoring sensor, signal adapter, PXI device, and central processing unit sequentially using wires. This method is simple in structure, rationally designed, easy to use and operate, low in cost, and convenient to install. Second, it collects ultra-high magnitude impact response spectrum test data and performs noise reduction and enhancement preprocessing. A custom calibration test signal is used, and the collected waveforms are recorded sequentially. Signal reception and analysis of the ultra-high magnitude impact response spectrum test signal are then performed, ensuring high safety and enabling simultaneous detection of impact and response spectra. Finally, the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor are determined. The acceleration response is converted into an impact response spectrum, and the maximum desired environment and optimal test conditions are determined based on the dynamic response data. This method is highly practical and effective.

[0042] This invention proposes a test fixture design concept and method based on "conduction amplification effect technology," which has been successfully applied to this experiment, solving key technical problems in ultra-high magnitude impact response spectrum testing and achieving good results. This invention also proposes a new model suitable for tackling experimental engineering technical problems: "practical investigation - problem identification - concentrated effort to overcome." Through repeated analysis, this invention determined that tooling and monitoring sensors are the key factors affecting this experiment, and explored and summarized a set of process operation steps and equipment state maintenance methods suitable for this experiment, which can maintain impact acceleration stability within 10%.

[0043] To address the issues of limited effective range, poor impact resistance, and low-frequency response lag found in the preliminary and exploratory testing of the monitoring sensor, this invention first analyzed the sensor's structure and manufacturing process. It was discovered that variations in the welding quality of the sensor output significantly impacted its actual effective range. Through multiple communications and discussions with the sensor manufacturer, the existing welding process was improved. The trial sensor provided by the manufacturer ultimately showed significant improvements in testing performance, meeting the requirements of this type of high-volume impact testing. In the preliminary and exploratory testing, the collection and analysis of sensor signal recovery time data revealed that the effective recovery time to zero after each impact test was approximately 15 minutes. This also resolved the accuracy issue of low-frequency detection by the sensor, establishing a test operation requirement of at least 15 minutes between two impacts.

[0044] Second, considering the technical solution as a whole or from a product perspective, the technical effects and advantages of the technical solution to be protected by this invention are specifically described as follows:

[0045] The ultra-high magnitude impact response spectrum testing system provided by this invention has a simple structure, low testing cost, and high safety. It can provide feasible test methods and procedures for subsequent similar tests, and also provide support and guarantee for the development of the aerospace test market, with good economic and social benefits. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a flowchart of the ultra-high magnitude impact response spectrum testing method provided in the embodiments of the present invention;

[0048] Figure 2 This is a flowchart of the preprocessing process for ultra-high magnitude impact response spectrum test data provided in an embodiment of the present invention;

[0049] Figure 3 This is a flowchart of the analysis and processing method for ultra-high-level impact response spectrum test signals provided in an embodiment of the present invention. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0051] To address the problems existing in the prior art, the present invention provides a method, system, medium, device and terminal for testing ultra-high magnitude impact response spectra. The present invention will be described in detail below with reference to the accompanying drawings.

[0052] I. Explanatory and Illustrative Embodiments. To enable those skilled in the art to fully understand how the present invention is specifically implemented, this section provides an explanatory and illustrative description of the embodiments described in the claims.

[0053] like Figure 1 As shown, the ultra-high magnitude impact response spectrum testing method provided in this embodiment of the invention includes the following steps:

[0054] S101, Connect the ultra-high magnitude impact response spectrum test device: Install the ultra-high magnitude impact monitoring sensor on the platform of the impact response spectrum test device under test, and connect the ultra-high magnitude impact monitoring sensor to the signal adapter, PXI device and central processing unit in sequence using wires.

[0055] S102, Acquisition and preprocessing of ultra-high-level impact response spectrum test data: The data acquisition module is used to acquire ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data, and the data preprocessing module is used to perform noise reduction and enhancement preprocessing and signal transmission on the acquired data.

[0056] S103 performs analysis and processing of ultra-high-level impact response spectrum test signals: the function generator module realizes the custom signal function and customizes the calibration test signal; the oscilloscope module records the acquired waveforms in sequence, and performs signal reception and analysis and processing of ultra-high-level impact response spectrum test signals.

[0057] S104, Conduct ultra-high magnitude impact response spectrum testing: Determine the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor; convert the acceleration response into an impact response spectrum, and determine the maximum expected environment and optimal test experimental conditions based on the dynamic response data.

[0058] The ultra-high magnitude impact monitoring sensor in step S104 provided in this embodiment of the invention is an ultra-high magnitude impact piezoelectric acceleration monitoring sensor.

[0059] The connection method of the ultra-high magnitude impact response spectrum testing device in step S101 of the present invention includes: connecting the output end of the ultra-high magnitude impact monitoring sensor to the input end of the signal adapter with a wire, connecting the output end of the signal adapter to the input end of the PXI device with a wire, and connecting the output end of the PXI device to the input end of the central processing unit with a wire.

[0060] like Figure 2As shown, the preprocessing method for ultra-high-level impact response spectrum test data in step S102 of the present invention includes:

[0061] S201, the fully noise-assisted aggregated empirical mode decomposition algorithm is used to perform mode decomposition on the original ultra-high magnitude impact response spectrum test dataset to obtain several intrinsic mode function components;

[0062] S202, Pearson correlation analysis is performed on the original test data and several intrinsic mode function components respectively to obtain the correlation coefficient between each intrinsic mode function component and the original test data;

[0063] S203 extracts the features of ultra-high magnitude impact response spectrum test data based on the correlation coefficient between each intrinsic mode function component and the original test data, and uses a bidirectional denoising autoencoder network for denoising.

[0064] The ultra-high magnitude impact response spectrum testing method provided in this invention first installs the ultra-high magnitude impact monitoring sensor on the platform of the impact response spectrum test device, and then connects the ultra-high magnitude impact monitoring sensor, signal adapter, PXI device and central processing unit in sequence with wires. It has a simple structure, reasonable design, and is easy to use, operate, cost-effective and convenient to install.

[0065] like Figure 3 As shown, the method for analyzing and processing the ultra-high-level impact response spectrum test signal in step S103 of this embodiment of the invention includes:

[0066] The S301 uses a function generator to customize the ultra-high magnitude impact response spectrum calibration test signal, and uses an oscilloscope module to record and acquire the ultra-high magnitude impact response spectrum test waveform and receive the signal.

[0067] S302, the amplifier circuit amplifies the received ultra-high level impulse response spectrum test signal and outputs the amplified ultra-high level impulse response spectrum test signal to the A / D conversion circuit.

[0068] The S303 uses an A / D conversion circuit to output the signal after analog-to-digital conversion to the central processing unit. The central processing unit analyzes and processes the signal and outputs and displays the results.

[0069] This invention collects ultra-high-level impact response spectrum test data and performs noise reduction and enhancement preprocessing; it uses a custom calibration test signal, records the collected waveforms sequentially, and performs signal reception and analysis processing of ultra-high-level impact response spectrum test signals. It has high security and can simultaneously detect impact spectrum and response spectrum.

[0070] The method for testing ultra-high-level impact response spectra in step S104 of this invention includes:

[0071] (1) Excitation prediction is performed on the ultra-high level impact monitoring sensor, and the finite element prediction method is selected to predict the dynamic response data of the ultra-high level impact monitoring sensor according to the characteristics of the excitation.

[0072] (2) Determine the monitoring point of the ultra-high magnitude impact monitoring sensor, and use the mathematical model prediction method to obtain the acceleration response data of the monitoring point of the ultra-high magnitude impact monitoring sensor;

[0073] (3) Use the recursive digital filtering method to convert the acceleration response of all monitoring points into an impact response spectrum, and determine the maximum expected environment and the best test experimental conditions based on the dynamic response data.

[0074] This invention determines the dynamic response data and acceleration response data of an ultra-high magnitude impact monitoring sensor; converts the acceleration response into an impact response spectrum; and determines the maximum expected environment and optimal test conditions based on the dynamic response data. It is highly practical and effective.

[0075] The ultra-high magnitude impact response spectrum testing system provided in this embodiment of the invention includes:

[0076] The data acquisition module, connected to the central control module, is used to acquire ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data through data acquisition equipment.

[0077] The data preprocessing module, connected to the central control module, is used to perform noise reduction and enhancement processing on the acquired ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data through the data preprocessing program.

[0078] The signal transmission module, connected to the central control module, is used to send the pre-processed ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data to the central processor via a wireless communication device.

[0079] The central control module is connected to the data acquisition module, data preprocessing module, signal transmission module, function generator module, oscilloscope module, testing module, and data storage and display module. It is used to coordinate and control the normal operation of each module of the ultra-high magnitude impact response spectrum testing system through the central processor.

[0080] The function generator module, connected to the central control module, is used to implement custom signal functions through the function generator and to customize ultra-high-level impact response spectrum test signals;

[0081] The oscilloscope module, connected to the central control module, is used to record the acquired waveforms sequentially via the oscilloscope, and to receive signals and analyze and process ultra-high-level impact response spectrum test signals.

[0082] The testing module, connected to the central control module, is used to determine the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor; convert the acceleration response into an impact response spectrum; and determine the maximum expected environment and optimal test experimental conditions based on the dynamic response data.

[0083] The data storage and display module, connected to the central control module, is used to store the collected ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data, ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data after noise enhancement processing, custom signal results, signal analysis and processing results, and ultra-high-level impact response spectrum test results through a cloud database server, and display them on a monitor.

[0084] The ultra-high magnitude impact response spectrum testing system provided in this invention has a simple structure, low testing cost, and high safety. It can provide feasible test methods and procedures for subsequent similar tests, and also provides support and guarantee for the development of the aerospace test market, with good economic and social benefits.

[0085] II. Application Examples. To demonstrate the inventiveness and technical value of the technical solution of this invention, this section provides application examples of the technical solution of the claims on specific products or related technologies.

[0086] An application embodiment of the present invention provides a computer program product stored on a computer-readable medium, including a computer-readable program that, when executed on an electronic device, provides a user input interface to apply the steps of the ultra-high magnitude impact response spectrum testing method.

[0087] An application embodiment of the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to apply the steps of the ultra-high magnitude impact response spectrum testing method.

[0088] An application embodiment of the present invention provides an information data processing terminal, which is used to implement the ultra-high magnitude impact response spectrum testing system.

[0089] III. Evidence of the Relevant Effects of the Embodiments. The embodiments of the present invention have achieved some positive effects during research and development or use, and indeed possess significant advantages compared to existing technologies. The following description, in conjunction with data, charts, and other materials from the experimental process, illustrates these advantages.

[0090] 1. In early 2021, our company was commissioned by a research institute to complete an "ultra-high-level impact response spectrum test" of the thrust device for a certain type of spacecraft. According to the commissioning party, no domestic institution was capable of performing this test, and if our company could complete it, we could be awarded more other testing tasks. In response, our company established a special task force. Technical analysis identified the main challenges of this test as follows:

[0091] (1) According to the test conditions, its high frequency response value is very high, its low frequency response value is very low, and the tolerance requirements of the acceleration response curve are strict, which is difficult to achieve on the test bench.

[0092] (2) The monitoring points must be located in the designated area of ​​the product fixture. Under large value conditions, the response characteristics and transfer characteristics of the test fixture are subject to stringent requirements. The test fixture is crucial to the success or failure of the test.

[0093] (3) The experimental scale has basically reached the limit of the existing experimental equipment. Therefore, the equipment adjustment space is very small during the test, which can easily cause damage to the experimental equipment and test failure.

[0094] (4) The test requires extremely high impact energy and very low low-frequency response, which makes the selection and use of monitoring sensors extremely difficult. Otherwise, it will not only affect the accuracy of signal acquisition, but may even damage the sensor.

[0095] 2. Plan and Implementation

[0096] 2.1 Organizational Assurance

[0097] Because completing this test task is crucial to the company's business expansion, and the client's test requirements are high and the task is difficult to implement, the company attaches great importance to it. First, a special task force was established, led by the Technology Department and composed mainly of technical backbones from the Test Engineering Department. This team comprehensively planned everything from test organization and coordination, technical solutions, implementation steps, test support, and risk assessment, ensuring meticulous attention to detail to guarantee the completion of the test and the achievement of user approval.

[0098] 2.2 Innovative Technology Breakthrough Working Model

[0099] In response to the client's requirements for the test conditions, the Technical Department, in conjunction with the Test Engineering Department, determined a technical problem-solving plan based on a "practical investigation - problem identification - concerted effort to overcome" approach. Following this plan, they conducted preliminary investigations and research on the ultra-high-amplitude impact test to verify and identify key factors affecting the test, explore feasible test implementation methods, and address issues such as acceleration response curve adjustment and deviations, impact pressure settings, the stiffness and padding position of the impact spectrum modulator, and the number of impact cycles. Through continuous and repeated investigation, analysis, and research, this embodiment of the invention determined that tooling and monitoring sensors are the key factors affecting the test, and explored and summarized a set of process operation steps and equipment condition maintenance methods suitable for this test, which can maintain impact acceleration stability within 10%.

[0100] 2.3 Innovative Design Ideas for Experimental Fixtures

[0101] A specialized product testing fixture was designed to meet the experimental requirements. Through preliminary investigation and testing, it was found that when using relatively heavy traditional testing fixtures, the response acceleration on the fixture was less than 6000g when the impact platform reached 30000g, indicating significant attenuation, and requiring a large impact air pressure. Therefore, traditional product testing fixture design ideas and methods are completely unsuitable for the requirements of this experiment, necessitating a new design approach. To solve the testing fixture design problem, this invention, after research, literature review, technical analysis, and discussion, proposes a testing fixture design idea based on "conduction amplification effect technology." Under the guidance of the technical supervisor, the tooling designer carried out the structural design of the testing fixture. The design principle was to use a thin-walled structure as much as possible while meeting the impact strength requirements, and to position the sample at the top of the fixture to utilize the conduction amplification effect. After design, stress calculations were performed on the structural model to ensure that the fixture could meet both the experimental strength and the quantitative response requirements. Meanwhile, the test fixture designed using new technologies reduces the required impact air pressure to 6–7 kg / cm² for the same impact value. 2 Reduced to 4.5 kg / cm 2 This also allows for the full utilization and enhancement of the equipment's testing capabilities, ensuring a wide range of adjustments to the equipment.

[0102] 2.4 Overcoming the bottlenecks in sensor application technology

[0103] To address the issues of limited effective range, poor impact resistance, and low-frequency response lag found in the preliminary and exploratory tests of the monitoring sensors, this invention first analyzed the sensor's structure and manufacturing process. It was discovered that variations in the welding quality of the sensor output significantly impacted its actual effective range. After multiple communications and discussions with the sensor manufacturer, the existing welding process was improved. The trial sensor provided by the manufacturer ultimately showed significant improvements in testing performance, meeting the requirements of such high-volume impact tests. Furthermore, the collection and analysis of sensor signal recovery time data during the preliminary and exploratory tests revealed that the effective recovery time to zero after each impact test was approximately 15 minutes. This also resolved the accuracy issue of low-frequency detection by the sensor, establishing a test operation requirement of at least 15 minutes between impacts.

[0104] 3. Implementation Results

[0105] The "ultra-high magnitude impact response spectrum test" task proposed by the client was completed on schedule and with high quality, and was recognized by the client. It provided feasible test methods and procedures for similar tests in the future, and also provided support and guarantee for the company to expand into the aerospace test market.

[0106] 4. Technological Achievements

[0107] 1) This invention proposes a test fixture design concept and method based on "conduction amplification effect technology", which has been successfully applied to this test, solving the key technical problems in the ultra-high magnitude impact response spectrum test and achieving good results; 2) This invention proposes a new model suitable for tackling technical problems in test engineering, namely "practical investigation - problem identification - concerted efforts to overcome".

[0108] It should be noted that embodiments of the present invention can be implemented in hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated-design hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a carrier medium such as a disk, CD, or DVD-ROM, a programmable memory such as read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented by hardware circuitry such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field-programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of the above-described hardware circuitry and software, such as firmware.

[0109] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for testing ultra-high magnitude impact response spectra, characterized in that, The ultra-high magnitude shock response spectrum testing method includes the following steps: Step 1: Connect the ultra-high magnitude impact response spectrum test device: Install the ultra-high magnitude impact monitoring sensor on the platform of the impact response spectrum test device, and connect the ultra-high magnitude impact monitoring sensor to the signal adapter, PXI device and central processing unit in sequence using wires. Step 2: Acquisition and preprocessing of ultra-high-level impact response spectrum test data: The data acquisition module is used to acquire ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data, and the data preprocessing module is used to perform noise reduction and enhancement preprocessing on the acquired data and signal transmission. Step 3: Analyze and process the ultra-high magnitude impact response spectrum test signal: Implement custom signal functions through the function generator module and customize the calibration test signal; record the acquired waveforms sequentially through the oscilloscope module, and perform signal reception and analysis and processing of the ultra-high magnitude impact response spectrum test signal; Step 4: Conduct ultra-high magnitude impact response spectrum testing: Determine the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor; convert the acceleration response into an impact response spectrum, and determine the maximum expected environment and optimal test experimental conditions based on the dynamic response data. The ultra-high magnitude impact monitoring sensor in step one is an ultra-high magnitude impact piezoelectric acceleration monitoring sensor. The preprocessing method for the ultra-high magnitude impact response spectrum test data in step two includes: (1) The original ultra-high magnitude impact response spectrum test dataset was decomposed into several intrinsic mode function components by using the fully noise-assisted aggregated empirical mode decomposition algorithm; (2) Perform Pearson correlation analysis on the original test data and several intrinsic mode function components respectively to obtain the correlation coefficient between each intrinsic mode function component and the original test data; (3) Extract the features of the ultra-high magnitude impact response spectrum test data based on the correlation coefficient between each intrinsic mode function component and the original test data, and use a bidirectional denoising autoencoder network for denoising; The testing method for the ultra-high-level impact response spectrum in step four includes: (1) Excitation prediction is performed on the ultra-high magnitude impact monitoring sensor, and the finite element prediction method is selected to predict the dynamic response data of the ultra-high magnitude impact monitoring sensor according to the characteristics of the excitation. (2) Determine the monitoring point of the ultra-high magnitude impact monitoring sensor, and use the mathematical model prediction method to obtain the acceleration response data of the monitoring point of the ultra-high magnitude impact monitoring sensor; (3) Use the recursive digital filtering method to convert the acceleration response of all monitoring points into an impact response spectrum, and determine the maximum expected environment and the best test experimental conditions based on the dynamic response data.

2. The method for testing ultra-high magnitude impact response spectra as described in claim 1, characterized in that, The connection method of the ultra-high magnitude impact response spectrum testing device in step one includes: The output terminal of the ultra-high magnitude impact monitoring sensor is connected to the input terminal of the signal adapter using a wire. The output terminal of the signal adapter is connected to the input terminal of the PXI device using a wire. The output terminal of the PXI device is connected to the input terminal of the central processing unit using a wire.

3. The method for testing ultra-high magnitude impact response spectra as described in claim 1, characterized in that, The analysis and processing method for the ultra-high-level impact response spectrum test signal in step three includes: (1) The ultra-high magnitude impact response spectrum calibration test signal is customized by the function generator, the ultra-high magnitude impact response spectrum test waveform is recorded by the oscilloscope module, and the signal is received; (2) The amplifier circuit amplifies the received ultra-high level impact response spectrum test signal and outputs the amplified ultra-high level impact response spectrum test signal to the A / D conversion circuit. (3) The analog-to-digital conversion signal is output to the central processing unit using the A / D conversion circuit. The central processing unit analyzes and processes the signal and outputs and displays the results.

4. A system for testing ultra-high-level impact response spectra using the ultra-high-level impact response spectrum testing method as described in any one of claims 1 to 3, characterized in that, The ultra-high magnitude shock response spectrum testing system includes: The data acquisition module, connected to the central control module, is used to acquire ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data through data acquisition equipment. The data preprocessing module, connected to the central control module, is used to perform noise reduction and enhancement processing on the acquired ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data through the data preprocessing program. The signal transmission module, connected to the central control module, is used to send the pre-processed ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data to the central processor via a wireless communication device. The central control module is connected to the data acquisition module, data preprocessing module, signal transmission module, function generator module, oscilloscope module, testing module, and data storage and display module. It is used to coordinate and control the normal operation of each module of the ultra-high magnitude impact response spectrum testing system through the central processor. The function generator module, connected to the central control module, is used to implement custom signal functions through the function generator and to customize ultra-high-level impact response spectrum test signals; The oscilloscope module, connected to the central control module, is used to record the acquired waveforms sequentially via the oscilloscope, and to receive signals and analyze and process ultra-high-level impact response spectrum test signals. The testing module, connected to the central control module, is used to determine the dynamic response data and acceleration response data of the ultra-high magnitude impact monitoring sensor; convert the acceleration response into an impact response spectrum; and determine the maximum expected environment and optimal test experimental conditions based on the dynamic response data. The data storage and display module, connected to the central control module, is used to store the collected ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data, ultra-high-level impact spectrum test data and ultra-high-level response spectrum test data after noise enhancement processing, custom signal results, signal analysis and processing results, and ultra-high-level impact response spectrum test results through a cloud database server, and display them on a monitor.

5. A computer program product stored on a computer-readable medium, comprising a computer-readable program that, when executed on an electronic device, provides a user input interface for applying the steps of the ultra-high magnitude impact response spectrum testing method as described in any one of claims 1 to 3.

6. A computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to apply the steps of the ultra-high magnitude impact response spectrum testing method as described in any one of claims 1 to 3.

7. An information data processing terminal, characterized in that, The information data processing terminal is used to implement the ultra-high magnitude impact response spectrum testing system as described in claim 4.

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