A boost rocket thrust line attitude adjustment test device

Abstract

This invention relates to the field of measurement technology, and in particular to a test device for adjusting the thrust line attitude of a booster rocket. The device includes a base frame, with supports fixedly mounted at the front and rear ends of the upper surface of the base frame. Weight measuring mechanisms are respectively installed at the two upper ends of the supports. A lifting plate is connected to the upper surface of the base frame via a telescopic mechanism. Fixed plates are fixedly connected to the front and rear ends of the upper surface of the lifting plate. An elastic lifting mechanism is provided on the upper surface of the fixed plate. A rolling wheel is rotatably mounted on the front upper end of the fixed plate. A transmission wheel is rotatably mounted on the front surface of the fixed plate via a one-way mechanism. A transmission mechanism is provided between the outer surface of the transmission wheel and the rolling wheel. A toothed mechanism is provided at the front end of the transmission wheel. This invention can measure the center of gravity of the spacecraft by measuring the weight at four points, preventing multiple measurements of the same deformation position after repeated lifting and lowering of the spacecraft, which could lead to measurement errors and render the measurements meaningless.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a test device for adjusting the attitude of a booster rocket thrust line. Background Technology

[0002] Rockets are a type of vehicle that relies on the reaction force generated by a rocket engine for propulsion. During the development of a rocket, its weight and center of gravity need to be measured according to the requirements of different engineering stages. The quality of the measurement method used ultimately determines the accuracy and reliability of the actual measurement data. Smart sensors are typically used for multi-point weight measurement, providing a more efficient, accurate, and automated solution for rocket center of gravity measurement.

[0003] There are uncontrolled variables in the measurement process, which interfere with the stability and accuracy of the measurement. During multiple measurements, the actual weight of the surface points changes due to changes in the aircraft's own weight distribution (such as fuel consumption and component movement) or external pressure. Existing test devices have this problem. Therefore, a booster rocket thrust line attitude adjustment test device is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a test device for adjusting the attitude of the thrust line of a booster rocket.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a booster rocket thrust line attitude adjustment testing device, comprising a base frame, brackets fixedly installed at the front and rear ends of the upper surface of the base frame, a weighing mechanism respectively provided at the two upper ends of the brackets, a lifting plate connected to the upper surface of the base frame via a telescopic mechanism, a fixed plate fixedly connected to the front and rear ends of the upper surface of the lifting plate, an elastic lifting mechanism provided on the upper surface of the fixed plate, a rolling wheel rotatably installed at the front of the upper end of the fixed plate, a transmission wheel rotatably installed on the front surface of the fixed plate via a one-way mechanism, a transmission mechanism provided between the outer surface of the transmission wheel and the rolling wheel, and a toothed mechanism provided at the front end of the transmission wheel.

[0006] Preferably, wheels are installed at the corners of the lower surface of the bracket.

[0007] Preferably, the weighing mechanism includes a mounting plate fixedly installed on the upper end of the bracket, a sensor fixedly installed on the upper surface of the mounting plate, and a support plate connected to the upper end of the sensor via an adapter.

[0008] Preferably, a plurality of reinforcing rods are fixedly connected between the two fixed plates. The telescopic mechanism includes two fixed seats fixedly installed on the upper surface of the base frame. A lifting cylinder and a guide cylinder are respectively fixedly installed on the upper surface of the two fixed seats. The telescopic end of the lifting cylinder is fixedly installed on the lower surface of one fixed plate. A guide post is slidably inserted into the upper end of the guide cylinder. The upper end of the guide post is fixedly connected to the lower surface of the other fixed plate.

[0009] Preferably, the elastic lifting mechanism includes a bent plate fixedly connected to the upper surface of the fixed plate. Two guide rods slide through the upper surface of the bent plate. A V-shaped plate is fixedly connected to the upper ends of the two guide rods. Support plates extend from the front of the V-shaped plate and from its two upper ends. An upper limit plate is fixedly sleeved on the outer surface of the guide rod. A lower limit plate is fixedly connected to the lower end of the guide rod. A compression spring is sleeved on the outer surface of the guide rod, and the compression spring is located between the upper limit plate and the bent plate.

[0010] Preferably, the one-way mechanism includes a drive shaft fixedly connected to the rear surface of the drive wheel, the drive shaft rotatably passing through the front surface of the fixed plate, a ratchet fixedly sleeved on the rear end of the outer surface of the drive shaft, a pawl rotatably connected to the rear surface of the fixed plate near the ratchet via a rotating shaft, one end of the pawl being engaged with the edge of the ratchet, a positioning seat fixedly connected to the rear surface of the fixed plate near the lower part of the pawl, a spring plate fixedly mounted on the upper surface of the positioning seat, the upper surface of the spring plate contacting the lower surface of the pawl.

[0011] Preferably, the transmission mechanism includes a wheel axle fixedly connected to the front surface of the rolling wheel, the wheel axle rotatably passing through the outer surface of the vertical plate, and a transmission belt is sleeved between the front end of the outer surface of the wheel axle and the outer surface of the transmission wheel.

[0012] Preferably, the gear mechanism includes a fixed frame that is fixedly installed on the upper surface of the base frame and close to the front of the fixed plate. The upper surface of the fixed frame is connected to a gear plate through a reset mechanism. A transmission gear is fixedly connected to the front end of the transmission wheel, and the transmission gear meshes with the gear plate.

[0013] Preferably, the reset mechanism includes a sliding opening that penetrates the upper surface of the fixed frame, a slider fixedly connected to the lower surface of the toothed plate, the slider slidingly engaging the inner side of the sliding opening, a retaining rod fixedly connected to the inner wall of the sliding opening, a reset spring sleeved on the outer surface of the retaining rod, and the reset spring being located on the side of the slider away from the transmission gear.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention can determine the center of gravity of an aircraft by measuring weight at four points.

[0016] This invention prevents the aircraft from repeatedly measuring the same deformation position after multiple lift-up and lowering operations, which could lead to measurement errors and render the measurements meaningless. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a booster rocket thrust line attitude adjustment test device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the sensor location of a booster rocket thrust line attitude adjustment test device according to the present invention.

[0019] Figure 3 This is a partial structural schematic diagram of a test device for adjusting the thrust line attitude of a booster rocket according to the present invention;

[0020] Figure 4 This invention relates to a test device for adjusting the thrust line attitude of a booster rocket. Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the elastic lifting mechanism of the booster rocket thrust line attitude adjustment test device of the present invention;

[0022] Figure 6 This is a schematic diagram of the fixing plate of a booster rocket thrust line attitude adjustment test device according to the present invention;

[0023] Figure 7 This invention relates to a test device for adjusting the thrust line attitude of a booster rocket. Figure 6 Enlarged view at point B in the middle;

[0024] Figure 8 This is a cross-sectional view of the fixed frame of a test device for adjusting the thrust line attitude of a booster rocket according to the present invention.

[0025] Figure 9 This is a diagram showing the usage state of the booster rocket thrust line attitude adjustment test device of the present invention;

[0026] Figure 10 This is a schematic diagram of a test device for adjusting the attitude of a booster rocket thrust line according to the present invention.

[0027] The components are as follows: 1. Base frame; 2. Wheels; 3. Bracket; 4. Mounting plate; 5. Sensor; 6. Adapter; 7. Support plate; 8. Lifting plate; 9. Fixed seat; 10. Lifting cylinder; 11. Guide cylinder; 12. Guide column; 13. Fixed plate; 14. Reinforcing rod; 15. Support plate; 16. V-shaped plate; 17. Bending plate; 18. Guide rod; 19. Upper limit plate; 20. Lower limit plate; 21. Compression spring; 22. Vertical connecting plate; 23. Rolling wheel; 24. Axle; 25. Transmission wheel; 26. Transmission belt; 27. Transmission gear; 28. Tooth plate; 29. ​​Fixed frame; 30. Sliding mouth; 31. Holding rod; 32. Return spring; 33. Slider; 34. Transmission shaft; 35. Ratchet; 36. Pad; 37. Rotating shaft; 38. Positioning seat; 39. Spring plate. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] like Figures 1-10 The device shown is a test device for adjusting the thrust line attitude of a booster rocket. It includes a base frame 1. The upper surface of the base frame 1 is fixedly mounted with brackets 3 at the front and rear ends respectively. The two upper ends of the brackets 3 are respectively provided with a weighing mechanism. The upper surface of the base frame 1 is connected to a lifting plate 8 through a telescopic mechanism. The upper surface of the lifting plate 8 is fixedly connected with a fixing plate 13 at the front and rear ends respectively. The upper surface of the fixing plate 13 is provided with an elastic lifting mechanism. A rolling wheel 23 is rotatably mounted on the front end of the upper end of the fixing plate 13. A transmission wheel 25 is rotatably mounted on the front surface of the fixing plate 13 through a one-way mechanism. A transmission mechanism is provided between the outer surface of the transmission wheel 25 and the rolling wheel 23. A toothed mechanism is provided at the front end of the transmission wheel 25.

[0030] Wheels 2 are installed at the corners of the lower surface of the bracket 3. This facilitates the movement of the entire testing device and makes overall movement easier.

[0031] The weighing mechanism includes a mounting plate 4 fixedly installed on the upper end of the bracket 3. A sensor 5 is fixedly installed on the upper surface of the mounting plate 4, and a support plate 7 is connected to the upper end of the sensor 5 via an adapter 6. The sensor 5 is a weighing sensor. The adapter 6 can rotate relative to the sensor 5. At the same time, the support plate 7 can rotate relative to the adapter 6. Therefore, the support plate 7 can be made to fit as closely as possible to the surface of the rocket.

[0032] Several reinforcing rods 14 are fixedly connected between the two fixed plates 13. The telescopic mechanism includes two fixed seats 9 fixedly installed on the upper surface of the base frame 1. A lifting cylinder 10 and a guide cylinder 11 are respectively fixedly installed on the upper surface of the two fixed seats 9. The telescopic end of the lifting cylinder 10 is fixedly installed on the lower surface of one fixed plate 13. A guide post 12 is slidably inserted into the upper end of the guide cylinder 11. The upper end of the guide post 12 is fixedly connected to the lower surface of the other fixed plate 13. When the lifting cylinder 10 telescopically extends or retracts, the guide post 12 slides relative to the guide cylinder 11, improving the stability of the lifting plate 8 during movement.

[0033] The elastic lifting mechanism includes a bent plate 17 fixedly connected to the rear surface of the fixed plate 13. Two guide rods slidably pass through the upper surface of the bent plate 17. A V-shaped plate 16 is fixedly connected to the upper ends of the two guide rods 18. Support plates 15 extend from the front of the V-shaped plate 16 and from its two upper ends. An upper limit plate 19 is fixedly fitted onto the outer surface of the guide rods 18, and a lower limit plate 20 is fixedly connected to the lower end of the guide rods 18. A compression spring 21 is fitted onto the outer surface of the guide rods 18, and the compression spring 21 is located between the upper limit plate 19 and the bent plate 17. The support plates 15 lift the surface of the aircraft. When the fixed plate 13 moves upward, the support plates 15 first lift the aircraft, and then the aircraft moves downward synchronously, causing the rolling wheels 23 to contact the lower surface of the aircraft.

[0034] The one-way mechanism includes a drive shaft 34 fixedly connected to the rear surface of the drive wheel 25. The drive shaft 34 rotatably passes through the front surface of the fixed plate 13. A ratchet 35 is fixedly sleeved on the rear end of the outer surface of the drive shaft 34. A pawl 36 is rotatably connected to the rear surface of the fixed plate 13 and the side near the ratchet 35 via a rotating shaft 37. One end of the pawl 36 is engaged with the edge of the ratchet 35. A positioning seat 38 is fixedly connected to the rear surface of the fixed plate 13 and the lower part near the pawl 36. A spring plate 39 is fixedly mounted on the upper surface of the positioning seat 38. The upper surface of the spring plate 39 is in contact with the lower surface of the pawl 36. When the fixed plate 13 rises, the transmission gear 27 rolls relative to the side of the toothed plate 28, the ratchet 35 rotates, pushing the pawl 36, the pawl 36 rotates around the pivot 37, squeezing the spring plate 39. When the ratchet 35 protrudes away from the end of the pawl 36, under the elastic force of the spring plate 39, the end of the pawl 36 will be locked back into the recess of the pawl 36.

[0035] The transmission mechanism includes an axle 24 fixedly connected to the front surface of the rolling wheel 23. The axle 24 rotates through the outer surface of the vertical connecting plate 22. A transmission belt 26 is fitted between the front end of the outer surface of the axle 24 and the outer surface of the transmission wheel 25. The rolling wheel 23 can rotate about the axle 24 as an axis. The rolling wheel 23 is made of hard rubber.

[0036] The gear mechanism includes a fixed frame 29 fixedly mounted on the upper surface of the base frame 1 and close to the front of the fixed plate 13. The upper surface of the fixed frame 29 is connected to a gear plate 28 via a reset mechanism. A transmission gear 27 is fixedly connected to the front end of the transmission wheel 25, and the transmission gear 27 meshes with the gear plate 28. When the fixed plate 13 moves upward, the transmission gear 27 rolls along the surface of the gear plate 28.

[0037] The reset mechanism includes a slide 30 penetrating the upper surface of the fixed frame 29. A slider 33 is fixedly connected to the lower surface of the toothed plate 28. The slider 33 slides into the inner side of the slide 30. A retaining rod 31 is fixedly connected to the inner wall of the slide 30. A reset spring 32 is sleeved on the outer surface of the retaining rod 31, and the reset spring 32 is located on the side of the slider 33 away from the transmission gear 27. When the toothed plate 28 is pushed, the slider 33 can compress the reset spring 32. Therefore, when the fixed plate 13 moves down, the transmission gear 27 moves down, and the toothed plate 28 can be pushed to one side without jamming.

[0038] The coordinate system is determined by taking the foremost point of the aircraft's nose cone as the origin, the direction from the nose to the tail as the positive X-axis, and the vertical upward direction as the positive Z-axis. The coordinate system conforms to the right-hand rule, thus determining the positive Y-axis. When the aircraft is placed on the support 3, it is supported by four support plates 7, forming four fulcrums. G1, G2, G3, and G4 represent the readings of the four position sensors 5, respectively, and G represents the total weight of the aircraft. At this time, the aircraft is placed on the test device, and the support plates 7 are slightly adjusted to make the readings of the two sensors 5 at the front and rear as close to equal as possible. The readings of the four sensors 5 are then recorded.

[0039] Next, the aircraft needs to be gently lifted and lowered repeatedly for multiple measurements. Finally, the average value of the readings from each sensor 5 is taken, and data at points with excessive errors are cleared. These points represent the deformation locations on the aircraft surface. During lifting, the lifting cylinder 10 is extended, causing the lifting plate 8 and the fixed plate 13 to move upwards. The transmission gear 27 rolls along the surface of the toothed plate 28. Under the transmission of the transmission belt 26, the upper axle 24 and the rolling wheel 23 rotate, causing the aircraft to rotate slightly. The aircraft presses against the support plate 15, compressing the spring 21 to ensure that the support plate 15 and the V-shaped plate 16 can move downwards, ensuring that the rolling wheel 23 can contact the aircraft. Therefore, while slightly lifting the aircraft, it can be slightly rotated, thus ensuring that multiple measurements of the aircraft are taken at multiple points. This prevents repeated lifting and lowering from measuring the same deformation location multiple times, which would cause measurement errors and render the measurements meaningless.

[0040] When the lifting cylinder 10 retracts, the ratchet 35 is locked by the pawl 36, preventing it from rotating. This ensures that the transmission wheel 25, transmission belt 26, and rolling wheel 23 will not rotate during downward movement. The transmission gear 27 pushes the toothed plate 28, causing the slider 33 to slide along the inner side of the slide opening 30 and compress the return spring 32. This does not obstruct the downward movement of the transmission gear 27. Therefore, it can be ensured that the rolling wheel 23 will not rotate when the fixed plate 13 moves downward, preventing the aircraft from rotating. After the aircraft lands, the position measurement can be performed.

[0041] like Figure 10 As shown, G1, G2, G3, and G4 represent the readings of four position sensors 5, and G represents the total weight of the aircraft. From the diagram, we can see that G1, G2, G3, G4, L1, L2, and L4 are known, while L3 and L5 are unknown. Therefore:

[0042] ①

[0043] Taking moments about the measured center of gravity in the XOZ plane, we can obtain:

[0044] ②

[0045] From equation ②, we can obtain:

[0046] ③

[0047] Substituting equation ① into equation ③, we get:

[0048] ④

[0049] ② Combination Figure 1 From equation ④, we can obtain the coordinates of the aircraft's center of gravity X0 as follows:

[0050]

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test device for adjusting the attitude of the thrust line of a booster rocket, comprising a chassis (1), characterized in that: The upper surface of the base frame (1) is fixedly mounted with brackets (3) at the front and rear ends respectively. The two upper ends of the brackets (3) are respectively provided with weighing mechanisms. The upper surface of the base frame (1) is connected to a lifting plate (8) through a telescopic mechanism. The upper surface of the lifting plate (8) is fixedly connected with a fixing plate (13) at the front and rear ends respectively. The upper surface of the fixing plate (13) is provided with an elastic lifting mechanism. The upper front end of the fixing plate (13) is rotatably mounted with a rolling wheel (23). The front surface of the fixing plate (13) is rotatably mounted with a transmission wheel (25) through a one-way mechanism. The outer surface of the transmission wheel (25) and the rolling wheel (23) are provided with a transmission mechanism. The front end of the transmission wheel (25) is provided with a toothed mechanism. The elastic lifting mechanism includes a bent plate (17) fixedly connected to the upper surface of the fixed plate (13). Two guide rods (18) slide through the upper surface of the bent plate (17). The upper ends of the two guide rods (18) are fixedly connected to a V-shaped plate (16). Support plates (15) extend from the front of the V-shaped plate (16) and at the two upper ends. An upper limit plate (19) is fixedly sleeved on the outer surface of the guide rod (18). A lower limit plate (20) is fixedly connected to the lower end of the guide rod (18). A compression spring (21) is sleeved on the outer surface of the guide rod (18). The compression spring (21) is located between the upper limit plate (19) and the bent plate (17). The one-way mechanism includes a drive shaft (34) fixedly connected to the rear surface of the drive wheel (25). The drive shaft (34) rotates through the front surface of the fixed plate (13). A ratchet (35) is fixedly sleeved on the rear end of the outer surface of the drive shaft (34). A pawl (36) is rotatably connected to the rear surface of the fixed plate (13) and the side near the ratchet (35) via a rotating shaft (37). One end of the pawl (36) is locked on the edge of the ratchet (35). A positioning seat (38) is fixedly connected to the rear surface of the fixed plate (13) and below the pawl (36). A spring plate (39) is fixedly mounted on the upper surface of the positioning seat (38). The upper surface of the spring plate (39) is in contact with the lower surface of the pawl (36).

2. The booster rocket thrust line attitude adjustment test device according to claim 1, characterized in that: Wheels (2) are installed at the corners of the lower surface of the bracket (3).

3. The booster rocket thrust line attitude adjustment test device according to claim 1, characterized in that: The weighing mechanism includes a mounting plate (4) fixedly installed on the upper end of the bracket (3), and a sensor (5) is fixedly installed on the upper surface of the mounting plate (4). The upper end of the sensor (5) is connected to a support plate (7) through an adapter (6).

4. The booster rocket thrust line attitude adjustment test device according to claim 1, characterized in that: Several reinforcing rods (14) are fixedly connected between the two fixed plates (13). The telescopic mechanism includes two fixed seats (9) fixedly installed on the upper surface of the base frame (1). A lifting cylinder (10) and a guide cylinder (11) are fixedly installed on the upper surface of the two fixed seats (9). The telescopic end of the lifting cylinder (10) is fixedly installed on the lower surface of one fixed plate (13). A guide post (12) is slidably inserted into the upper end of the guide cylinder (11). The upper end of the guide post (12) is fixedly connected to the lower surface of the other fixed plate (13).

5. The booster rocket thrust line attitude adjustment test device according to claim 1, characterized in that: The transmission mechanism includes a wheel axle (24) fixedly connected to the front surface of the rolling wheel (23). The wheel axle (24) rotates through the outer surface of the vertical plate (22). A transmission belt (26) is sleeved between the front end of the outer surface of the wheel axle (24) and the outer surface of the transmission wheel (25).

6. The booster rocket thrust line attitude adjustment test device according to claim 1, characterized in that: The gear mechanism includes a fixed frame (29) fixedly installed on the upper surface of the base frame (1) and close to the front of the fixed plate (13). The upper surface of the fixed frame (29) is connected to a gear plate (28) through a reset mechanism. The front end of the transmission wheel (25) is fixedly connected to a transmission gear (27), and the transmission gear (27) meshes with the gear plate (28).

7. The booster rocket thrust line attitude adjustment test device according to claim 6, characterized in that: The reset mechanism includes a slide (30) that penetrates the upper surface of the fixed frame (29). A slider (33) is fixedly connected to the lower surface of the toothed plate (28). The slider (33) slides into the inner side of the slide (30). A retaining rod (31) is fixedly connected to the inner wall of the slide (30). A reset spring (32) is sleeved on the outer surface of the retaining rod (31). The reset spring (32) is located on the side of the slider (33) away from the transmission gear (27).

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