CN117268338A - Marine rocket launching platform attitude dip angle testing method - Google Patents

Abstract

The invention discloses a method for testing the attitude and inclination angle of a maritime rocket launch platform, which belongs to the field of rocket launch technology and solves the technical problem that the base station signal is poor due to the sea launch being far away from the roadbed, resulting in drift in the test results. It includes the following steps: S1. Propose a test plan based on the rocket launch platform system and arrange multiple measurement points; S2. Install inclination sensors on multiple measurement points and communicate with the data acquisition system respectively; S3 , Set the acquisition parameters of the data acquisition system according to the performance parameters of multiple inclination sensors, perform comparative reference calibration on the inclination sensors set on the same axis, and initialize the system after multiple inclination sensors are calibrated; S4, collect and export data; S5 , analyze the data and obtain the platform posture during the test phase. The invention has a wide application range, obtains accurate data, and can be better used to comprehensively describe the attitude of the offshore rocket launch platform.

Description

A method for testing the attitude and inclination angle of a maritime rocket launch platform

Technical field

The invention relates to the field of rocket launch technology, and in particular to a method for testing the attitude and inclination angle of a maritime rocket launch platform.

Background technique

In recent years, as the market size of my country's launch vehicle commercial aerospace industry has surged, the market potential is huge. However, as the land launch site capacity is approaching saturation, sea launch vehicle space launch has become an important means and key development trend of my country's commercial aerospace industry.

One of the very important factors for the successful launch of a maritime launch vehicle is to meet the same nearly stable launch conditions as land launches, which requires the sea launch ship to ensure that the roll and pitch of the hull cannot exceed the specified angle at the moment of launch, otherwise the initial deflection angle It may cause the rocket to deviate from the planned trajectory after launch, and even lead to unpredictable serious consequences.

Most of the existing attitude test methods use GPS positioning technology. The sea launch is far away from the roadbed. The base station signal is too far away and has certain errors, which causes the test results to drift.

Therefore, there is an urgent need for a complete and accurate attitude inclination test method to solve the above problems during the launch of maritime launch vehicles.

Contents of the invention

In order to solve the above problems, the present invention provides a complete and accurate method for testing the attitude and inclination angle of a maritime rocket launch platform.

The present invention provides the following technical solutions:

The invention provides a method for testing the attitude and inclination angle of a maritime rocket launch platform, which includes the following steps:

S1. Propose a test plan based on the rocket launch platform system and arrange multiple measurement points;

S2. Install inclination sensors on multiple measuring points, and connect the multiple inclination sensors to the data acquisition system;

S3. Set the acquisition parameters of the data acquisition system according to the performance parameters of multiple inclination sensors, perform comparative reference calibration on the inclination sensors set on the same axis, and initialize the system after multiple inclination sensors are calibrated;

S4. Collect and export data;

S5. Analyze the data to obtain the platform posture during the test phase.

Optionally or preferably, the rocket launch platform system includes a rocket body, a rocket launcher carrying the rocket body, and a sea rocket launch platform. The rocket launcher is disposed at the upper center of the sea rocket launch platform. Location.

Optional or preferred, the method of arranging multiple measuring points in S1 includes the following steps:

S11. Install an inclination sensor two on the offshore rocket launch platform and directly below the rocket body;

S12. Install an inclination sensor three at the rear of the deck of the maritime rocket launch platform and on the same transverse axis as the inclination sensor two;

S13. Install an inclination sensor four on one side of the deck of the maritime rocket launch platform and on the same longitudinal axis as the inclination sensor two;

S14. Install an inclination sensor one on the side of the ship side of the offshore rocket launch platform and on the same vertical axis as the inclination sensor two;

S15. Connect the inclination sensor one, the inclination sensor two, the inclination sensor three, and the inclination sensor four to the data acquisition system through communication cables.

Optional or preferred, the method for comparison reference calibration of the inclination sensors located on the same axis in S3 includes the following steps:

S31. Install the inclination sensor and set the test parameters of the data acquisition system;

S32. Perform pre-parameter collection. As the offshore rocket launch platform shakes, the inclination sensor located on the same axis collects the inclination change data on the same axis, including reference data m and reference data n . The data collection duration is 60s;

S33. Intercept the collected tilt angle change data respectively, intercepting a total of 10 segments, and the duration of each intercepted segment is 6 seconds;

S34. Select the maximum value, minimum value, and average value of the data in each intercepted segment, then take the difference, and determine whether it is within the specified range;

S35. Determine the installation position of the inclination sensor. If the differences are within the specified range, it is judged that the inclination sensor is installed correctly. Otherwise, it is judged that the inclination sensor is installed incorrectly. It is necessary to reinstall and repeat steps S31 to S34 until the requirements are met.

Optional or preferred, the method for judging whether each difference value is within the specified interval in S34 is:

in, is the maximum value of the data in each intercepted segment in the reference data m , is the maximum value of the data in each intercepted segment in the reference data n ;

is the minimum value of data in each intercepted segment in the reference data m , is the minimum value of data in each intercepted segment in the reference data n ;

is the data average of each intercepted segment in the reference data m , is the data average of each intercepted segment in the reference data n .

Optional or preferred, the method of data analysis in S5 includes the following steps:

S51. After the test is completed, the collected data of each inclination sensor is obtained. The collected data includes time data and axis inclination value;

S52. Segment the axis inclination value into segments;

S53. Calculate the peak-peak value and average value of the axis inclination angle value of each section, and obtain the peak-peak sequence and average sequence of the complete test time respectively;

S54. Taking time as the abscissa and the peak-peak and average sequence as the ordinate, obtain the platform attitude data analysis image of the entire test phase, where the peak-peak value is the maximum shaking of the platform during the entire test phase, and the average value is the platform posture data analysis image of the entire test phase. The platform balance deviation situation.

Based on the above technical solution, the present invention can at least produce the following technical effects:

The invention provides a method for testing the attitude and inclination of a maritime rocket launch platform. By arranging multiple inclination sensor measuring points, the attitude changes of key parts of the launch platform can be accurately measured, and through the axis position relationship between the multiple inclination sensors, it can be achieved Calibration and comparison of data collected by multiple inclination sensors; through analysis of the collected data, the attitude changes of the offshore rocket launch platform in each axis direction can be accurately described.

Description of the drawings

Figure 1 is a flow chart of the attitude and inclination angle testing method of the offshore rocket launch platform of the present invention;

Figure 2 is a side view of the arrangement of the inclination sensor in the attitude inclination test method of the maritime rocket launch platform of the present invention;

Figure 3 is a top view of the arrangement of the inclination sensor in the attitude and inclination angle testing method of the maritime rocket launch platform of the present invention;

Figure 4 is a graph showing changes in peak-to-peak value and average value over time in the attitude and inclination angle testing method of the maritime rocket launch platform of the present invention.

In the picture: 1. Rocket launcher; 2. Rocket body; 3. Communication cable; 4. Data acquisition system; 5. Sea rocket launch platform; 6. Inclination sensor one; 7. Inclination sensor two; 8. Inclination sensor Three; 9. Inclination sensor four.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on Embodiments of the present invention All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

Example

Please refer to Figures 1 to 4, a method for testing the attitude and inclination of a maritime rocket launch platform, including the following steps:

S1. Propose a test plan based on the rocket launch platform system and arrange multiple measurement points;

The rocket launch platform system includes a rocket body 2, a rocket launcher 1 carrying the rocket body 2, and a sea rocket launch platform 5. The rocket launcher 1 is arranged at the upper center of the sea rocket launch platform 5;

The above-mentioned arrangement method of multiple measuring points includes the following steps:

S11. Install an inclination sensor 27 on the sea rocket launch platform 5 and directly below the rocket body 2;

S12. Install an inclination sensor three 8 at the rear of the deck of the maritime rocket launch platform 5 and on the same transverse axis (i.e., X-axis) as the inclination sensor two 7;

S13. Install an inclination sensor 49 on one side of the deck of the maritime rocket launch platform 5 and on the same longitudinal axis (i.e. Y-axis) as the inclination sensor 27;

S14. Install an inclination sensor 6 on one side of the ship side of the offshore rocket launch platform 5 and on the same vertical axis (i.e. Z-axis) as the inclination sensor 2 7;

S15. Connect the inclination sensor one 6, the inclination sensor two 7, the inclination sensor three 8 and the inclination sensor four 9 to the data acquisition system 4 through the communication cable 3 respectively.

S2. Install inclination sensors on multiple measuring points respectively, and connect the multiple inclination sensors to the data acquisition system 4 through communication; the multiple inclination sensors and the data acquisition system 4 are connected through communication cables 3, as shown in Figure 2 to Shown by the dotted line in Figure 3;

S3. Set the acquisition parameters of the data acquisition system 4 according to the performance parameters of multiple inclination sensors, perform comparative reference calibration on the inclination sensors set on the same axis, and initialize the system after multiple inclination sensors are calibrated;

The above-mentioned comparative reference calibration method for inclination sensors located on the same axis includes the following steps:

S31. Install the inclination sensor and set the test parameters of the data acquisition system 4;

S32. Perform pre-parameter collection. As the offshore rocket launch platform 5 shakes, the inclination sensor located on the same axis collects the inclination change data on the same axis, including reference data m and reference data n . The data collection duration is 60s;

S33. Intercept the collected tilt angle change data respectively, intercepting a total of 10 segments, and the duration of each intercepted segment is 6 seconds;

S34. Select the maximum value, minimum value, and average value of the data in each intercepted segment, then take the difference, and determine whether it is within the specified range;

The method for judging whether each difference value is within the specified interval is:

in, is the maximum value of the data in each intercepted segment in the reference data m , is the maximum value of the data in each intercepted segment in the reference data n ;

is the minimum value of data in each intercepted segment in the reference data m , is the minimum value of data in each intercepted segment in the reference data n ;

is the data average of each intercepted segment in the reference data m , is the data average of each intercepted segment in the reference data n .

S35. Determine the installation position of the inclination sensor. If the differences are within the specified range, it is judged that the inclination sensor is installed correctly. Otherwise, it is judged that the inclination sensor is installed incorrectly. It is necessary to reinstall and repeat steps S31 to S34 until the requirements are met.

S4. Collect and export data;

S5. Analyze the data and obtain the posture of the platform during the test phase;

The above data analysis method includes the following steps:

S51. After the test is completed, the collected data of each inclination sensor is obtained. The collected data includes time data and axis inclination value;

S52. Segment the axis inclination value into segments;

S53. Calculate the peak-peak value and average value of the axis inclination angle value of each section, and obtain the peak-peak sequence and average sequence of the complete test time respectively;

S54. Taking time as the abscissa and the peak-peak and average sequence as the ordinate, obtain the platform attitude data analysis image of the entire test phase, where the peak-peak value is the maximum shaking of the platform during the entire test phase, and the average value is the platform posture data analysis image of the entire test phase. The platform balance deviation situation.

In this embodiment, an exemplary data processing method for selecting inclination sensor one 6, inclination sensor two 7, inclination sensor three 8, and inclination sensor four 9 is as follows:

After the test is completed according to the above process, the data collected by inclination sensor one 6, inclination sensor two 7, inclination sensor three 8 and inclination sensor four 9 are saved as dateA, dateB, dateC and dateD respectively. In this embodiment, dateB is tested for 30 minutes as example:

1) The obtained dateB data includes the first column of time data, the second column of X-axis inclination data, and the third column of Y-axis inclination data;

2) The second and third columns of dateB data are segmented every 30 seconds. Since the wave fluctuation period of sea conditions is about 4-6 seconds, 30 seconds can contain at least 4 complete fluctuation periods, which is divided into 30* 60÷30=60 segments;

3) Find the peak-peak value for all divided data segments, where the peak-peak value is the maximum value of the data in the data segment-the minimum value of the data;

For example, the numerical calculation of the X-axis inclination angle in the second column is:

peak_dateB_X_i=max_dateB_X_i- min_dateB_X_i, (i=1,2,3...60);

Get the peak-to-peak sequence every 30 seconds for the complete test time:

[peak_dateB_X_1;peak_dateB_X_2;peak_dateB_X_3;…;peak_dateB_X_60];

4) Calculate the average value of all divided data segments, where the average value = (maximum value of data in the data segment + minimum value of data in the data segment)/2;

For example, the numerical calculation of the X-axis inclination angle in the second column is:

mean_dateB_X_i=（max_dateB_X_i+min_dateB_X_i）÷2, (i=1,2,3……60);

Get a sequence of averages every 30 seconds for the complete test time:

[mean_dateB_X_1; mean_dateB_X_2; mean_dateB_X_3; ...; mean_dateB_X_60];

5) Drawing, with time as the abscissa and the peak-peak sequence and the average sequence as the ordinate, obtain the platform posture data analysis diagram of the entire test phase. Please refer to Figure 4. As can be seen from the figure, the platform posture of the entire test phase Attitude: Peak-peak value represents the maximum shaking of the platform during the entire testing phase, and the average value represents the balance deviation of the platform during the entire testing phase.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installed", "provided with", "set/connected", "connected", etc., should be understood in a broad sense, such as " "Connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be inside two components of connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. A method for testing the attitude and inclination angle of a maritime rocket launch platform, which is characterized by including the following steps: S1. Propose a test plan based on the rocket launch platform system and arrange multiple measurement points; S2. Install inclination sensors on multiple measuring points, and communicate with the data acquisition system (4); S3. Set the acquisition parameters of the data acquisition system (4) according to the performance parameters of multiple inclination sensors, perform comparative reference calibration on the inclination sensors set on the same axis, and initialize the system after multiple inclination sensors are calibrated; S4. Collect and export data; S5. Analyze the data to obtain the platform posture during the test phase. 2. The attitude inclination angle testing method of a maritime rocket launch platform according to claim 1, characterized in that the rocket launch platform system includes a rocket body (2) and a rocket launcher (2) carrying the rocket body (2). 1) and a sea rocket launch platform (5), the rocket launcher (1) is arranged at the upper center position of the sea rocket launch platform (5). 3. The attitude and inclination angle testing method of the maritime rocket launch platform according to claim 2, characterized in that the arrangement method of the plurality of measuring points in S1 includes the following steps: S11. Install two inclination sensors (7) on the maritime rocket launch platform (5) and directly below the rocket body (2); S12. Install the inclination sensor three (8) at the rear of the deck of the maritime rocket launch platform (5) and on the same transverse axis as the inclination sensor two (7); S13. Install the inclination sensor four (9) on one side of the deck of the maritime rocket launch platform (5) and on the same longitudinal axis as the inclination sensor two (7); S14. Install an inclination sensor one (6) on the side of the ship side of the maritime rocket launch platform (5) and on the same vertical axis as the inclination sensor two (7); S15. Connect the inclination sensor one (6), the inclination sensor two (7), the inclination sensor three (8) and the inclination sensor four (9) to the data acquisition system (4) respectively through the communication cable (3). connect. 4. The attitude and inclination angle testing method of the maritime rocket launch platform according to claim 2, characterized in that the method for comparative reference calibration of the inclination sensors located on the same axis in S3 includes the following steps: S31. Install the inclination sensor and set the test parameters of the data acquisition system (4); S32. Perform pre-parameter collection. As the offshore rocket launch platform (5) shakes, the inclination sensor located on the same axis collects the inclination change data on the same axis, including reference data m and reference data n . The data collection duration is 60s; S33. Intercept the collected tilt angle change data respectively, intercepting a total of 10 segments, and the duration of each intercepted segment is 6 seconds; S34. Select the maximum value, minimum value, and average value of the data in each intercepted segment, then take the difference, and determine whether it is within the specified range; S35. Determine the installation position of the inclination sensor. If the differences are within the specified range, it is judged that the inclination sensor is installed correctly. Otherwise, it is judged that the inclination sensor is installed incorrectly. It is necessary to reinstall and repeat steps S31 to S34 until the requirements are met. 5. The attitude and inclination angle testing method of a maritime rocket launch platform according to claim 4, characterized in that the method for judging whether each difference value is within a prescribed interval in S34 is: in, is the maximum value of the data in each intercepted segment in the reference data m , is the maximum value of the data in each intercepted segment in the reference data n ; is the minimum value of data in each intercepted segment in the reference data m , is the minimum value of data in each intercepted segment in the reference data n ; is the data average of each intercepted segment in the reference data m , is the data average of each intercepted segment in the reference data n . 6. The attitude and inclination angle testing method of a maritime rocket launch platform according to claim 2, characterized in that the method for data analysis in S5 includes the following steps: S51. After the test is completed, the collected data of each inclination sensor is obtained. The collected data includes time data and axis inclination value; S52. Segment the axis inclination value into segments; S53. Calculate the peak-peak value and average value of the axis inclination angle value of each section, and obtain the peak-peak sequence and average sequence of the complete test time respectively; S54. Taking time as the abscissa and the peak-peak and average sequence as the ordinate, obtain the platform posture data analysis image of the entire test phase, where the peak-peak value is the maximum shaking of the platform during the entire test phase, and the average value is the maximum shaking of the platform during the entire test phase. The platform balance deviation situation.