A method for correcting acceleration measurement data of a ballistic target test model

Abstract

This invention belongs to the field of ballistic target testing technology and discloses a method for correcting acceleration measurement data of a ballistic target test model. The method includes conducting an acceleration measurement experiment on the ballistic target test model; performing integral processing of the acceleration measurement data; comparing the peak velocity of the test model with the measured initial velocity; and correcting errors in the acceleration measurement data. This method is applicable to extreme overload acceleration environments such as ballistic target tests and artillery tests, where the acceleration amplitude is tens of thousands of gravitational accelerations and the duration is on the order of tens of milliseconds.

Description

Technical Field

[0001] This invention belongs to the field of ballistic target testing technology, specifically relating to a method for correcting acceleration measurement data of a ballistic target testing model. Background Technology

[0002] During ballistic target testing, the test model is subjected to extreme overload acceleration environments as it is launched from a stationary state to a flight speed of several thousand meters per second, reaching tens or even hundreds of thousands of g (g is the acceleration due to gravity). Under extreme overload acceleration environments, the performance of electronic components installed inside the test model will change to a certain extent. Inadequate protection measures can lead to performance degradation, malfunction, or even damage.

[0003] By installing accelerometers and related circuitry and power supplies inside the experimental model, accurate measurement of acceleration data during launch, flight, and recovery can be achieved, which is of great value for analyzing and evaluating the motion characteristics of the experimental model. In practical applications, to obtain better acceleration measurement accuracy, the accelerometers and related circuitry are typically calibrated beforehand using methods such as hammering or impact testing. The test data during actual application is then processed based on the calibration test results.

[0004] This calibration test method can achieve good acceleration measurement accuracy to a certain extent, but it also has two shortcomings: First, when using methods such as hammering or impact for calibration testing, although the applied acceleration amplitude can basically reach the tens of thousands of g level required for practical applications, the loading time is generally within ten microseconds (10). -5 The order of magnitude is s, which is much smaller than the milliseconds (10^6) required by actual applications. -3 Firstly, the magnitude of the accelerometer is low; secondly, the calibration and testing process for the accelerometer and its associated circuits can cause damage to the equipment to some extent, increasing the risk of damage after the equipment has been calibrated and tested and then put into actual use.

[0005] Currently, there is an urgent need to develop a method for correcting acceleration measurement data from ballistic target test models. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method for correcting acceleration measurement data of a ballistic target test model, so as to overcome the defects of the prior art and meet the needs of verifying and correcting acceleration measurement errors.

[0007] The method for correcting acceleration measurement data of the ballistic target test model of the present invention includes the following steps:

[0008] S10. Conduct acceleration measurement tests on ballistic target test models;

[0009] In the acceleration measurement test of the ballistic target test model, the acceleration curve of the test model during the launch process was measured by the accelerometer and supporting circuit module installed inside the test model.

[0010] S20. Perform integral processing of acceleration measurement data from the ballistic target test model;

[0011] Analyzing the acceleration curves, the starting acceleration time and time T when the experimental model completes launch acceleration and leaves the launch tube are determined. The acceleration measurement data before time T are then integrated and converted to a unified unit (m / s) to obtain the velocity curve of the experimental model. ;

[0012] S30. Compare the peak velocity of the experimental model with the measured initial velocity of the experimental model upon launch;

[0013] Based on the motion velocity curve of the experimental model The peak velocity of the experimental model was obtained. Then, the peak velocity of the experimental model was measured. Initial velocity measurement of the test model launch By comparing the two, the relative error between them can be obtained. ;

[0014] S40. Correct errors in acceleration measurement data of ballistic target test model;

[0015] Calculate the error correction factor for acceleration curve measurement data The acceleration curve of the test model during the launch process is corrected to obtain the corrected acceleration measurement data curve of the ballistic target test model.

[0016] The ballistic target test model acceleration measurement data correction method of the present invention utilizes the initial velocity measurement value of the ballistic target test model. By comparing the initial velocity measurement value with the peak velocity obtained by integrating the acceleration measurement data, the method corrects the acceleration measurement data error of the ballistic target test model, thus verifying or correcting the measurement error. This method is applicable to extreme overload acceleration environments such as ballistic target tests and artillery tests, where the acceleration amplitude is tens of thousands of gravitational accelerations and the duration is on the order of tens of milliseconds. Attached Figure Description

[0017] Figure 1 This is a flowchart of the acceleration measurement data correction method for the ballistic target test model of the present invention;

[0018] Figure 2 The acceleration curve of the ballistic target test model during launch;

[0019] Figure 3The velocity curve of the ballistic target test model;

[0020] Figure 4 Corrected data curves for acceleration measurement of ballistic target test model. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the figures and embodiments.

[0022] Example: Figure 1 As shown, the method for correcting acceleration measurement data of the ballistic target test model in this embodiment includes the following steps:

[0023] S10. Conduct acceleration measurement tests on ballistic target test models;

[0024] In the acceleration measurement test of the ballistic target test model, the accelerometer and supporting circuit module installed inside the test model were used to measure, for example, the acceleration was measured as follows: Figure 2 The acceleration curve of the test model during launch is shown below;

[0025] S20. Perform integral processing of acceleration measurement data from the ballistic target test model;

[0026] Analyzing the acceleration curves, the starting acceleration time of the experimental model and the time T after the launch acceleration is completed and the model leaves the launch tube are determined. Then, the acceleration measurement data before time T are integrated and converted to a unified unit (m / s²) to obtain the following results: Figure 3 The velocity curve of the experimental model shown ;

[0027] S30. Compare the peak velocity of the experimental model with the measured initial velocity of the experimental model upon launch;

[0028] Based on the motion velocity curve of the experimental model The peak velocity of the experimental model was obtained. Then, the peak velocity of the experimental model was measured. Compared with the measured initial velocity of the test model By comparing the two, the relative error between them can be obtained. ;

[0029] The peak velocity of the experimental model obtained in this embodiment is The initial velocity of the experimental model was measured using a laser light curtain velocimeter. The relative error between the two is 2.1%;

[0030] S40. Correct errors in acceleration measurement data of ballistic target test model;

[0031] Calculate the error correction factor for acceleration curve measurement data The acceleration curve of the test model during the launch process is corrected to obtain the corrected acceleration measurement data curve of the ballistic target test model.

[0032] Calculate the error correction factor for acceleration curve measurement data The acceleration curve of the experimental model during launch was corrected to obtain the following result: Figure 4 The curve shown is a corrected data curve of acceleration measurement for the ballistic target test model.

[0033] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. For those skilled in the art, all features disclosed in the present invention, or all steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way without departing from the principles of the present invention. The present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method of modifying ballistic target test model acceleration measurement data, the method comprising: Includes the following steps: ​ S10. Conduct acceleration measurement tests on ballistic target test models; In the acceleration measurement test of the ballistic target test model, the acceleration curve of the test model during the launch process was measured by the accelerometer and supporting circuit module installed inside the test model. S20. Perform integral processing of acceleration measurement data from the ballistic target test model; Analyzing the acceleration curves, the starting acceleration time and time T when the experimental model completes launch acceleration and leaves the launch tube are determined. The acceleration measurement data before time T are then integrated and converted to a unified unit (m / s) to obtain the velocity curve of the experimental model. ; S30. Compare the peak velocity of the experimental model with the measured initial velocity of the experimental model upon launch; Based on the motion velocity curve of the experimental model The peak velocity of the experimental model was obtained. ; Then, the peak velocity of the experimental model was measured. Compared with the measured initial velocity of the test model By comparing the two, the relative error between them can be obtained. ; S40. Correct errors in acceleration measurement data of ballistic target test model; Calculate the error correction factor for acceleration curve measurement data The acceleration curve of the test model during the launch process is corrected to obtain the corrected acceleration measurement data curve of the ballistic target test model.

Images