Tester pitching and rolling angle adjusting method and system for full-aircraft drop test

Abstract

The invention belongs to the field of aviation structure strength tests, and particularly relates to a testing machine pitching and rolling angle adjusting method and system for a full-aircraft drop test, and the method comprises the steps: adjusting the lengths of a front lifting rope l1 and a rear lifting rope l2 through a first servo motor; the lengths of the adjusted front lifting rope l1 and the adjusted rear lifting rope l2 are calculated through the cosine law according to the geometrical relationship; the lengths of the left lifting rope 13 and the right lifting rope 14 are adjusted through a second servo motor; and the lengths of the adjusted left lifting rope 13 and the right lifting rope 14 can be calculated through the cosine law according to the geometrical relationship. The pitching and rolling postures can be automatically adjusted, and the problems that an existing method is low in efficiency and poor in precision are solved. According to test experience, according to an existing posture adjusting method, replacement needs about half a day to one day every time, the number of times of putting every day does not exceed ten at most, and manual operation is needed on wings or a fuselage every time. And after automatic adjustment is achieved, the target can be achieved in several minutes through adjustment of the motor, efficiency is high, and safety is higher.

Description

Technical Field

[0001] This application belongs to the field of aerospace structural strength testing, and specifically relates to a method and system for adjusting the pitch and roll angles of a test aircraft in a full-aircraft drop test. Background Technology

[0002] During the development of an aircraft, a full-aircraft drop test must be conducted. The full-aircraft drop test involves many conditions and is related to the aircraft's attitude angles. Therefore, it is necessary to adjust the aircraft's pitch and roll angles multiple times during the test.

[0003] In recent years, shipborne full-aircraft drop tests have been conducted. These tests use slings to lift the aircraft and manually adjust the length of the sling screws to control its attitude. While this method is simple and easy to implement, the workload is enormous. After each adjustment, the aircraft is lifted to check if the attitude meets the requirements, then lowered back down for readjustment, until the attitude reaches the target.

[0004] Therefore, how to more effectively measure the overall shaking time of the aircraft is a problem that needs to be solved. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a method and system for adjusting the pitch and roll angles of a test machine in a full-machine drop test, thereby resolving the problem of low efficiency in adjusting the full-machine drop time in the prior art.

[0006] The technical solution of this application is: a method for adjusting the pitch and roll angles of a test machine in a full-scale drop test, comprising:

[0007] The lengths of the front suspension rope l1 and the rear suspension rope l2 are adjusted by the first servo motor;

[0008] The lengths of the front suspension rope l1 and the rear suspension rope l2 after adjustment are calculated using the law of cosines based on geometric relationships.

[0009] The lengths of the left suspension rope l3 and the right suspension rope l4 are adjusted by the second servo motor;

[0010] The lengths of the left suspension rope l3 and the right suspension rope l4 after adjustment can be obtained by calculating using the law of cosines based on geometric relationships.

[0011] Preferably, the lengths of the adjusted front suspension rope l1 and rear suspension rope l2 are:

[0012] ;

[0013] In the formula, Let l1 be the distance between the lower end of the suspension rope l1 and the center point of the coordinate system. Let l1 be the distance between the lower end of the rear suspension rope l1 and the coordinate center point, and h be the height of the first servo motor. for and The angle between connected straight lines.

[0014] Preferably, the lengths of the left suspension rope l3 and the right suspension rope l4 are:

[0015] ;

[0016] In the formula, Let l3 be the distance between the lower end of the left suspension rope l3 and the center point of the coordinate system. Let l4 be the distance between the lower end of the right suspension rope and the center point of the coordinate system. for and The angle between connected straight lines.

[0017] Preferably, the first servo motor is provided with a first roller, and the front suspension rope l1 and the rear suspension rope l2 are connected to the first roller.

[0018] Preferably, the second servo motor is provided with a second roller, and the left suspension rope l3 and the right suspension rope l4 are connected to the second roller.

[0019] Preferably, the height of the second servo motor is greater than that of the first servo motor.

[0020] Another technical solution of this application is: a pitch and roll angle adjustment system for a full-scale drop test, including a first servo motor, a front suspension rope l1 and a rear suspension rope l2; a second servo motor, a left suspension rope l3 and a right suspension rope l4;

[0021] The front suspension rope l1 and the rear suspension rope l2 are connected to the first servo motor; the left suspension rope l3 and the right suspension rope l4 are connected to the second servo motor.

[0022] The first servo motor adjusts the lengths of the front suspension rope l1 and the rear suspension rope l2; the second servo motor can adjust the lengths of the left suspension rope l3 and the right suspension rope l4.

[0023] The lengths of the front suspension rope l1 and the rear suspension rope l2 after adjustment can be calculated using the law of cosines; the lengths of the left suspension rope l3 and the right suspension rope l4 after adjustment can also be calculated using the law of cosines.

[0024] Preferably, the lengths of the adjusted front suspension rope l1 and rear suspension rope l2 are:

[0025] ;

[0026] In the formula, Let l1 be the distance between the lower end of the suspension rope l1 and the center point of the coordinate system. Let l1 be the distance between the lower end of the rear suspension rope l1 and the coordinate center point, and h be the height of the first servo motor. for and The angle between connected straight lines.

[0027] Preferably, the lengths of the left suspension rope l3 and the right suspension rope l4 are:

[0028] ;

[0029] In the formula, Let l3 be the distance between the lower end of the left suspension rope l3 and the center point of the coordinate system. Let l4 be the distance between the lower end of the right suspension rope and the center point of the coordinate system. for and The angle between connected straight lines.

[0030] Preferably, the first servo motor is provided with a first roller, and the suspension rope l1 and the rear suspension rope l2 are connected to the first roller.

[0031] Preferably, the second servo motor is provided with a second roller, and the left suspension rope l3 and the right suspension rope l4 are connected to the second roller.

[0032] Preferably, the height of the second servo motor is greater than that of the first servo motor.

[0033] The method and system for adjusting the pitch and roll angles of the test machine in the full-machine drop test of this application have the following advantages:

[0034] Without requiring manual intervention, it can automatically adjust pitch and roll attitude, solving the problems of low efficiency and poor accuracy of existing methods. Based on experimental experience, existing attitude adjustment methods take approximately half a day to a day for each adjustment, with a maximum of ten deployments per day, and each adjustment requires manual operation on the wing or fuselage. With automatic adjustment, driven by motors, the target can be achieved in minutes, which is not only more efficient but also safer. Attached Figure Description

[0035] Figure 1 This is a schematic diagram illustrating the principle of adjusting the pitch and roll angles of the testing machine in this application.

[0036] Figure 2 This is a simplified schematic diagram of the pitch angle adjustment principle in this application;

[0037] Figure 3 This is a simplified schematic diagram of the roll angle adjustment in this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0039] The first aspect of this application provides a method for adjusting the pitch and roll angles of a test machine in a full-scale drop test, such as... Figures 1-3 It includes the following steps:

[0040] In step S100, the lengths of the front suspension rope l1 and the rear suspension rope l2 are adjusted by the first servo motor.

[0041] The first servo motor is equipped with a first roller, and the front suspension rope l1 and the rear suspension rope l2 are connected to the first roller.

[0042] Control commands are sent from the back-end device to control the first servo motor to work. The first servo motor drives the first roller to rotate, and the first roller drives the front and rear suspension ropes to move up and down, thereby adjusting the length.

[0043] Step S200: Calculate the lengths of the front suspension rope l1 and the rear suspension rope l2 after adjustment using the law of cosines based on geometric relationships.

[0044] Preferably, after adjustment, the lengths of the front suspension rope l1 and the rear suspension rope l2 are:

[0045] ;

[0046] In the formula, Let l1 be the distance between the lower end of the suspension rope l1 and the center point of the coordinate system. Let l1 be the distance between the lower end of the rear suspension rope l1 and the coordinate center point, and h be the height of the first servo motor. for and The angle between connected straight lines.

[0047] In step S300, the lengths of the left suspension rope l3 and the right suspension rope l4 are adjusted by the second servo motor.

[0048] Preferably, the second servo motor is equipped with a second roller, and the left suspension rope l3 and the right suspension rope l4 are connected to the second roller.

[0049] Control commands are sent from the back-end device to control the second servo motor. The second servo motor drives the second roller to rotate, and the second roller drives the front and rear suspension ropes to move up and down, thereby adjusting the length.

[0050] Furthermore, the height of the second servo motor is greater than that of the first servo motor to prevent mutual interference.

[0051] Step S400: Based on geometric relationships, the lengths of the adjusted left suspension rope l3 and right suspension rope l4 can be calculated using the law of cosines.

[0052] Preferably, the lengths of the left suspension rope l3 and the right suspension rope l4 are:

[0053] ;

[0054] In the formula, Let l3 be the distance between the lower end of the left suspension rope l3 and the center point of the coordinate system. Let l4 be the distance between the lower end of the right suspension rope and the center point of the coordinate system. for and The angle between connected straight lines.

[0055] As another specific implementation, a pitch and roll angle adjustment system for a full-scale drop test includes a first servo motor, a front suspension rope l1 and a rear suspension rope l2; a second servo motor, a left suspension rope l3 and a right suspension rope l4;

[0056] The front suspension rope l1 and the rear suspension rope l2 are connected to the first servo motor; the left suspension rope l3 and the right suspension rope l4 are connected to the second servo motor.

[0057] The first servo motor adjusts the length of the front suspension rope l1 and the rear suspension rope l2; the second servo motor can adjust the length of the left suspension rope l3 and the right suspension rope l4.

[0058] The lengths of the front suspension rope l1 and the rear suspension rope l2 after adjustment can be calculated using the law of cosines; the lengths of the left suspension rope l3 and the right suspension rope l4 after adjustment can also be calculated using the law of cosines.

[0059] Preferably, after adjustment, the lengths of the front suspension rope l1 and the rear suspension rope l2 are:

[0060] ;

[0061] In the formula, Let l1 be the distance between the lower end of the suspension rope l1 and the center point of the coordinate system. Let l1 be the distance between the lower end of the rear suspension rope l1 and the coordinate center point, and h be the height of the first servo motor. for and The angle between connected straight lines.

[0062] Preferably, the lengths of the left suspension rope l3 and the right suspension rope l4 are:

[0063] ;

[0064] In the formula, Let l3 be the distance between the lower end of the left suspension rope l3 and the center point of the coordinate system. Let l4 be the distance between the lower end of the right suspension rope and the center point of the coordinate system. for and The angle between connected straight lines.

[0065] Preferably, the first servo motor is provided with a first roller, and the suspension rope l1 and the rear suspension rope l2 are connected to the first roller.

[0066] Preferably, the second servo motor is equipped with a second roller, and the left suspension rope l3 and the right suspension rope l4 are connected to the second roller.

[0067] Preferably, the height of the second servo motor is greater than that of the first servo motor to prevent mutual interference.

[0068] In summary, this application has the following advantages:

[0069] Without requiring manual intervention, it can automatically adjust pitch and roll attitude, solving the problems of low efficiency and poor accuracy of existing methods. Based on experimental experience, existing attitude adjustment methods take approximately half a day to a day for each adjustment, with a maximum of ten deployments per day, and each adjustment requires manual operation on the wing or fuselage. With automatic adjustment, driven by motors, the target can be achieved in minutes, which is not only more efficient but also safer.

[0070] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for adjusting the pitch and roll angles of a test machine in a full-scale drop test, characterized in that, include: The lengths of the front suspension rope l1 and the rear suspension rope l2 are adjusted by the first servo motor; The lengths of the front suspension rope l1 and the rear suspension rope l2 after adjustment are calculated using the law of cosines based on geometric relationships. The lengths of the left suspension rope l3 and the right suspension rope l4 are adjusted by the second servo motor; The lengths of the left suspension rope l3 and the right suspension rope l4 after adjustment can be obtained by calculating using the law of cosines based on geometric relationships.

2. The method for adjusting the pitch and roll angles of the test machine in the whole-machine drop test as described in claim 1, characterized in that, The adjusted lengths of the front suspension rope l1 and the rear suspension rope l2 are: ； In the formula, Let l1 be the distance between the lower end of the suspension rope l1 and the center point of the coordinate system. Let l1 be the distance between the lower end of the rear suspension rope l1 and the coordinate center point, and h be the height of the first servo motor. for and The angle between connected straight lines.

3. The method for adjusting the pitch and roll angles of the test machine in the whole-machine drop test as described in claim 2, characterized in that, The lengths of the left suspension rope l3 and the right suspension rope l4 are: ； In the formula, Let l3 be the distance between the lower end of the left suspension rope l3 and the center point of the coordinate system. Let l4 be the distance between the lower end of the right suspension rope and the center point of the coordinate system. for and The angle between connected straight lines.

4. The method for adjusting the pitch and roll angles of the test machine in the whole-machine drop test as described in claim 2, characterized in that, The first servo motor is equipped with a first roller, and the front suspension rope l1 and the rear suspension rope l2 are connected to the first roller.

5. The method for adjusting the pitch and roll angles of the test machine in the whole-machine drop test as described in claim 4, characterized in that, The second servo motor is equipped with a second roller, and the left suspension rope l3 and the right suspension rope l4 are connected to the second roller.

6. The method for adjusting the pitch and roll angles of the test machine in the whole-machine drop test as described in claim 5, characterized in that, The height of the second servo motor is greater than that of the first servo motor.

7. A system for adjusting the pitch and roll angles of a test machine for a full-scale drop test, comprising the method described in any one of claims 1-6, characterized in that: Includes a first servo motor, a front suspension rope l1 and a rear suspension rope l2; a second servo motor, a left suspension rope l3 and a right suspension rope l4; The front suspension rope l1 and the rear suspension rope l2 are connected to the first servo motor; the left suspension rope l3 and the right suspension rope l4 are connected to the second servo motor. The first servo motor adjusts the lengths of the front suspension rope l1 and the rear suspension rope l2; the second servo motor can adjust the lengths of the left suspension rope l3 and the right suspension rope l4. The lengths of the front suspension rope l1 and the rear suspension rope l2 after adjustment are calculated using the law of cosines. The lengths of the left suspension rope l3 and the right suspension rope l4 after adjustment can be calculated using the law of cosines.

8. The pitch and roll angle adjustment system for the whole-machine drop test as described in claim 7, characterized in that: The adjusted lengths of the front suspension rope l1 and the rear suspension rope l2 are: ； In the formula, Let l1 be the distance between the lower end of the suspension rope l1 and the center point of the coordinate system. Let l1 be the distance between the lower end of the rear suspension rope l1 and the coordinate center point, and h be the height of the first servo motor. for and The angle between connected straight lines.

9. The pitch and roll angle adjustment system for the whole-machine drop test as described in claim 8, characterized in that: The lengths of the left suspension rope l3 and the right suspension rope l4 are: ； In the formula, Let l3 be the distance between the lower end of the left suspension rope l3 and the center point of the coordinate system. Let l4 be the distance between the lower end of the right suspension rope and the center point of the coordinate system. for and The angle between connected straight lines.

10. The pitch and roll angle adjustment system for the whole-machine drop test as described in claim 8, characterized in that: The first servo motor is equipped with a first roller, and the suspension rope l1 and the rear suspension rope l2 are connected to the first roller.

11. The pitch and roll angle adjustment system for the whole-machine drop test as described in claim 10, characterized in that: The second servo motor is equipped with a second roller, and the left suspension rope l3 and the right suspension rope l4 are connected to the second roller.

12. The pitch and roll angle adjustment system for the whole-machine drop test as described in claim 11, characterized in that: The height of the second servo motor is greater than that of the first servo motor.

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