Aileron folding and unfolding gap detection device and method

Abstract

The application discloses an air rudder folding and unfolding gap detection device, which comprises a workbench (5), characterized in that a locking tool (3) is fixedly installed on the workbench (5), a constant force output device (7) is fixedly installed on the right side of the workbench (5) relative to the locking tool (3), and a distance sensor (2) is fixedly installed behind the locking tool (3); wherein the locking tool (3) comprises two identical locking tool structures (30), each locking tool structure (30) comprises a rudder shaft tool base (31) and a rudder shaft overhanging cylindrical clamping structure (32); the device and the processing method can accurately identify the highest point of the rudder surface change in the detection gap, directly display the final value of the folding and unfolding gap, improve the detection efficiency, and guarantee the correctness and stability of the result.

Description

Technical Field

[0001] This invention relates to a device and method for detecting the folding and unfolding gap of an air rudder, specifically involving the use of an air rudder clamping device, a constant force output device, and a sensor to measure the folding and unfolding gap of an air rudder under a certain force, belonging to the field of assembly inspection. Background Technology

[0002] With the gradual development of the aerospace field, the application of aerodynamic control products is increasing. As a core component of the flight control system on spacecraft, the performance parameters of the aerodynamic control system are crucial to the stable operation of the spacecraft, playing a vital role in attitude control and flight direction. An aerodynamic control system is a combined structure assembled from control surfaces and a control shaft. Due to space limitations, the structure of aerodynamic control systems is often designed in a folding and unfolding form. The gap between the control surfaces and the control shaft after folding and unfolding is critical to changing the magnitude of airflow and the lateral control force required to alter flight attitude. Therefore, the gap after folding and unfolding must be specified within a certain range during the overall structural and performance design phase of the spacecraft to ensure product reliability.

[0003] After the air rudder assembly is assembled, the gap between the air rudder surface and the rudder shaft needs to be detected when a specified force in two reciprocating directions is applied to the upper vertical surface of the rudder surface.

[0004] In the testing of the folding and unfolding of air rudders, the usual method involves one person manually applying a specified force to the upper surface of the rudder surface using a tension gauge after the multiple air rudders are fixedly clamped, while another person measures the gap between the rudder surface and the upper surface of the rudder shaft using a height gauge or digital height gauge. In practice, this method requires multiple people to complete the testing process. Using a tension gauge can cause instability in the applied force value, fluctuating within a certain range. Furthermore, when measuring the gap between the rudder surface and the rudder shaft, after applying the specified force, there is an angle between the lower surface of the rudder surface and the upper surface of the rudder shaft. It is difficult to capture the highest point of the lower surface of the rudder surface during manual measurement, leading to some error in the measurement results.

[0005] Therefore, it is necessary to design a device for detecting the folding and unfolding gap of the air rudder and to propose a method for detecting such folding and unfolding gap, so as to improve the detection speed and accuracy of the air rudder folding and unfolding gap, and to improve the efficiency of the detection process and the consistency of the detection results. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide an air rudder folding and unfolding gap detection device and method to achieve accurate detection.

[0007] A device for detecting the gap between the folding and unfolding of an air rudder includes a worktable 5. The device is characterized by a locking fixture 3 fixedly mounted on the worktable 5, a constant force output device 7 fixedly mounted on the worktable 5 to the right of the locking fixture 3, and a distance sensor 2 fixedly mounted behind the locking fixture 3.

[0008] Locking fixture 3 includes two identical locking fixture structures 30. Each locking fixture structure 30 includes a rudder shaft fixture base 31 and a rudder shaft cantilever cylindrical clamping structure 32. The rudder shaft fixture base 31 is an angular plate with multiple bolt holes 311. The rudder shaft cantilever cylindrical clamping structure 32 is a triangular prism structure with a right-angled triangle cross-section. The prism surface containing the longer side of the right-angled triangle has an air rudder shaft contouring structure 321, and the prism surface containing the right-angled side of the right-angled triangle is the fixture locking surface 322. The tooling locking surface 322 has multiple screw holes 3221. In use, the rudder shaft cantilever cylindrical clamping structure 32 of the two locking tooling structures 30 clamps the rudder shaft 13 in the two air rudder shaft conforming structures 321. The rudder shaft cantilever cylindrical clamping structure 32 is fastened together with two locking angle irons 4 to firmly clamp the rudder shaft 13. Then, the two rudder shaft tooling bases 31 are used to clamp the two rudder shaft cantilever cylindrical clamping structures 32. Finally, the rudder shaft tooling base 31 is fastened to the worktable 5 with bolts through bolt holes 311.

[0009] The constant force output device 7 includes a support platform 71, a power unit 72, and a constant force transmission plate 73; the support platform 71 is fixed on the workbench 5, the power unit 72 is fixed on the support platform 71, and the constant force transmission plate 73 is connected to the power unit 72 via a sliding pair.

[0010] The distance sensor 2 is fixedly mounted on the worktable 5 directly below the air rudder surface 12;

[0011] In use, the locking fixture 3 is used to lock the rudder shaft 13 of the air rudder 1, making the rudder shaft 13 perpendicular to the worktable 5 and the lower end face of the rudder shaft 13 in contact with the worktable 5; the groove under the constant force transmission plate 73 is inserted into the rubber block structure 11 of the air rudder 1, and the constant force output device 7 applies positive and negative horizontal thrust to the air rudder 1 through the constant force transmission plate 73. At this time, the distance sensor 2 measures the distance from the highest point of the lower surface 121 of the air rudder rudder surface 12 to the surface of the worktable 5, so as to calculate the distance from the highest point of the lower surface 121 of the air rudder rudder surface 12 to the upper surface of the rudder shaft, that is, the size of the folding gap.

[0012] A method for detecting the folding and unfolding gap of an air rudder using the air rudder folding and unfolding gap detection device as described in claim 1, characterized by comprising the following steps:

[0013] Step 1: First, fix the distance sensor 2 onto the worktable 5, and install the constant force output device 7 on the worktable 5;

[0014] Step 2: Use locking fixture 3 to lock the rudder shaft 13 of the air rudder 1 to ensure that the air rudder 1 does not wobble;

[0015] Step 3: Push the locking fixture 3 and the air rudder 1 together into the designated position along the slotted direction of the constant force transmission plate, and fix them to the worktable 5 with bolts.

[0016] Step 4: Control the constant force output device 7 to output a set force in a straight and stable manner to the air rudder 1 in a certain direction perpendicular to the rudder surface 12;

[0017] Step 5: Detect the maximum distance from the lower surface 121 of the rudder surface 12 to the worktable surface 5 using distance sensor 2, and subtract the distance from the upper surface of the rudder shaft to the worktable surface 5 from the maximum distance to calculate the value of the folding gap.

[0018] Step 6: Control the constant force output device 7 to stably output a set force to the air rudder 1 in the opposite direction to that in Step 4; repeat Step 5; obtain the value of the folding gap under the set force in the opposite direction.

[0019] Step 7: Obtain the values ​​of the two folding gaps under the set forces in opposite directions, and compare these two values ​​with the set standard folding gap values ​​respectively:

[0020] a. If the values ​​of both folding gaps are less than the set standard folding gap values, the air rudder 1 is a qualified product;

[0021] b. If either of the two folding gap values ​​is greater than the set standard folding gap value, the air rudder 1 is a defective product;

[0022] Step 8: This test is now complete.

[0023] The beneficial effects of this invention are as follows: This invention relates to a device and method for detecting the folding and unfolding gap of an air rudder. After the air rudder is fixed in the detection device, a constant force output system can output stable and specified forces in two directions perpendicular to the air rudder surface. A distance sensor can detect the maximum change in the lower plane of the air rudder, and the maximum value within a certain detection range is the folding and unfolding gap value. This invention's device and processing method can reduce the number of personnel required for air rudder folding and unfolding gap detection, while applying a stable force. It can accurately identify the highest point of surface change within the detected gap, directly displaying the final folding and unfolding gap value, improving detection efficiency, and ensuring the accuracy and stability of the results. Attached Figure Description

[0024] Figure 1 A schematic diagram of the device in use according to the present invention;

[0025] Figure 2 This is a schematic diagram of the air rudder 1 structure;

[0026] Figure 3 1 is a cross-sectional view of the air rudder.

[0027] Figure 4 1 is a schematic diagram of the clamping fixture 3 structure;

[0028] Figure 5 This is a schematic diagram of the process of measuring the folding and unfolding gap.

[0029] In the diagram, 1 is the air rudder, 2 is the sensor, 3 is the locking fixture, 4 is the locking angle iron, 5 is the worktable, 7 is the constant force output device, 11 is the rubber block structure, 12 is the air rudder surface, 13 is the rudder shaft, 14 is the air rudder pivot, 15 is the air rudder locking structure, 30 is the locking fixture structure, 31 is the rudder shaft fixture base, 32 is the rudder shaft cantilever cylindrical clamping structure, 71 is the support platform, 73 is the constant force transmission plate, 72 is the power unit, 121 is the lower surface, 311 is the bolt hole, 321 is the air rudder shaft contour structure, 322 is the fixture locking surface, and 3221 is the screw hole.

[0030] The lower surface of the air rudder 1 remains parallel to the upper surface of the worktable 5 when no tension is applied.

[0031] Distance sensor 2 is mounted on worktable 5, directly below the control surface 12. When a lateral force of 50N is applied, it can detect the distance from any point on the lower surface 121 of the control surface 12 to worktable 5 and automatically provide the maximum distance value.

[0032] The rudder shaft cantilever cylindrical clamping structure 32 in the clamping fixture 3 is consistent with the stepped shaft structure at the lower part of the rudder shaft 13. The whole device contains two sets of locking fixture structures 30, which are combined to wrap the stepped structure of the rudder shaft 13, ensuring that the lower surface 121 of the rudder surface 12 is parallel to the upper surface of the worktable 5.

[0033] The pivot hole structure is located in the middle of the rudder shaft 13 and is a through hole. The air rudder pivot shaft 14 passes through the pivot hole and is connected to the rudder surface 12. The rudder surface 12 and the rudder shaft 13 rotate around the air rudder pivot shaft 14 to form a rotating pair. Detailed Implementation

[0034] The technical solution for an air rudder folding and unfolding gap detection device is as follows:

[0035] The locking fixture 3 is internally designed to mimic the shape of the air rudder shaft. Two identical locking fixtures 3 clamp the rudder shaft 13 to secure the air rudder 1.

[0036] Two locking angle irons 4 are fixed to two locking fixtures 3 by threaded connection.

[0037] The locking fixture 3 is fixed to the worktable 5 by multiple threaded connections.

[0038] The constant force output device 7 can reciprocate and output a specified force in the forward and backward directions. The constant force output device 7 is connected to the support platform 71 by bolts. The constant force transmission plate 73 is fixed to the kinematic pair of the power unit 72 by threaded connection and is clearance-fitted to the rubber block structure 11 on the upper surface of the air rudder 1.

[0039] The distance sensor 2 is located below the control surface 12 of the air rudder 1 and is used to detect the amount of movement of the highest point of the lower surface 121 of the control surface 12 after it is folded and unfolded.

[0040] A method for improving the efficiency and ensuring the accuracy of air rudder folding and unfolding gap detection includes the following steps:

[0041] First, fix the distance sensor 2 onto the worktable 5, and install the constant force output device 7 on the worktable 5;

[0042] The second step is to clamp the air rudder 1 with the locking fixture 3, and use the locking angle iron 4 to fix the locking fixture 3 to ensure that no displacement occurs.

[0043] The second step is to push the locking fixture 3 and the air rudder 1 together into the designated position along the slotted direction of the constant force transmission plate 73, and fix them to the worktable 5 with bolts.

[0044] The third step is to control the constant force output device 7 to output a certain force in a straight and stable direction perpendicular to the control surface 12 to the air rudder 1.

[0045] The fourth step is to read the measured value of the change in the folding and unfolding gap after the distance sensor data has stabilized.

[0046] Fifth, repeat steps three and four, only changing the direction of the constant force output to the other direction.

[0047] To make the technical means and methods of implementing this invention easier to understand, the following description, in conjunction with the use of the processing device and the testing method, will further elaborate on them.

[0048] The air rudder 1 structure mainly includes a rubber block structure 11, a rudder surface body 12, and a rudder shaft 13.

[0049] The rotating joint between the control surface body 12 and the control shaft 13 is the air rudder shaft 14; after deployment, rotation is restricted, and locking is achieved by the air rudder locking structure 15, see Figure 3 As shown.

[0050] The folding and unfolding clearance of the air rudder is an important product performance characteristic; see [link / reference needed]. Figure 5 As shown.

[0051] The testing process is as follows:

[0052] The first step is to install sensor 2 and constant force output device 7. Distance sensor 2 is fixed on workbench 5, and constant force output device is fixed on support platform 71. Constant force transmission plate 73 is installed and connected to the sliding pair of power unit 72 of constant force output device 7 via threads. Installation is done once without disassembly, and multiple sets of test experiments can be performed.

[0053] The second step is to assemble the air rudder 1 with the two locking fixtures 3 and fix them by relying on the locking angle iron 4.

[0054] The third step is to push the air rudder 1 and the locking fixture 3 assembly into the designated position along the slotted direction of the constant force transmission plate 73, and fix it to the worktable 5 by threaded connection.

[0055] The fourth step is to detect the distance between the control surface body 12 and the sensor 2 by the distance sensor 2 and then perform zeroing.

[0056] The fourth step is to control the constant force output device 7 to apply a 50N force to the rubber block structure 11 of the air rudder 1. The direction of the force is a straight line perpendicular to a certain direction of the rudder surface 12.

[0057] Fifth step, the distance sensor 2 detects the change in the distance between the highest point of the rudder body 12 and the distance sensor 2, that is, the sensor 2 displays the change in the folding and unfolding gap after the force is applied.

[0058] Step 6: Operate the constant force output device 7, and output a 50N force in the opposite direction, perpendicular to the rudder surface 12, using the constant force transmission plate 73. Repeat step 5.

[0059] In the seventh step, the constant force transmission plate 73 is reset, the locking fixture 3 is removed, the air rudder 1 is removed, and subsequent testing and experiments are conducted. Steps one through six are repeated.

[0060] The above description describes the main features, specific implementation methods and advantages of the present invention. It should be noted that those skilled in the art may propose several improvements and variations based on the technical principles of the present invention, but such improvements and variations should also be considered within the scope of protection of the present invention patent.

Claims

1. A device for detecting the gap between the folding and unfolding of an air rudder, comprising a worktable (5), characterized in that, A locking fixture (3) is fixedly installed on the workbench (5). A constant force output device (7) is fixedly installed on the workbench (5) to the right of the locking fixture (3). A distance sensor (2) is fixedly installed behind the locking fixture (3). The locking fixture (3) includes two identical locking fixture structures (30). Each locking fixture structure (30) includes a rudder shaft fixture base (31) and a rudder shaft overhanging cylindrical clamping structure (32). The rudder shaft fixture base (31) is an angular plate with multiple bolt holes (311). The rudder shaft overhanging cylindrical clamping structure (32) is a triangular prism structure with a right-angled triangle cross-section. The prism surface containing the long side of the right-angled triangle has an air rudder shaft contouring structure (321). The prism surface containing the right-angled side of the right-angled triangle is the fixture locking surface (322). The locking surface (322) has multiple screw holes (3221). When in use, the rudder shaft overhanging cylindrical clamping structure (32) of the two locking tooling structures (30) clamps the rudder shaft (13) in the two air rudder shaft conforming structures (321). The rudder shaft overhanging cylindrical clamping structure (32) is fastened together with two locking angle irons (4) to firmly clamp the rudder shaft (13). Then, the two rudder shaft tooling bases (31) are used to clamp the two rudder shaft overhanging cylindrical clamping structures (32). Then, the rudder shaft tooling base (31) is fastened to the worktable (5) with bolts through the bolt holes (311). The constant force output device (7) includes a support platform (71), a power unit (72), and a constant force transmission plate (73); the support platform (71) is fixed on the workbench (5), the power unit (72) is fixed on the support platform (71), and the constant force transmission plate (73) is connected to the power unit (72) via a sliding pair. The distance sensor (2) is fixedly installed on the worktable (5) directly below the air rudder surface (12); When in use, the locking fixture (3) is used to lock the rudder shaft (13) of the air rudder (1) so that the rudder shaft (13) is perpendicular to the worktable (5) and the lower end face of the rudder shaft (13) is in contact with the worktable (5); the groove under the constant force transmission plate (73) is inserted into the rubber block structure (11) of the air rudder (1), and the constant force output device (7) applies positive and negative horizontal thrust to the air rudder (1) through the constant force transmission plate (73). At this time, the distance sensor (2) measures the distance from the highest point of the lower surface (121) of the air rudder rudder surface (12) to the surface of the worktable (5) to calculate the distance from the highest point of the lower surface (121) of the air rudder rudder surface (12) to the upper surface of the rudder shaft, that is, the size of the folding gap.

2. A method for detecting the folding and unfolding gap of an air rudder using the air rudder folding and unfolding gap detection device as described in claim 1, characterized in that, Includes the following steps: Step 1: First, fix the distance sensor (2) onto the worktable (5) and install the constant force output device 7 on the worktable 5; Step 2: Use the locking fixture (3) to lock the rudder shaft (13) of the air rudder (1) to ensure that the air rudder (1) does not wobble; Step 3: Push the locking fixture (3) and the air rudder (1) together into the designated position along the slotted direction of the constant force transmission plate, and fix them to the worktable (5) with bolts; Step 4: Control the constant force output device (7) to output a set force to the air rudder (1) in a straight and stable direction perpendicular to the rudder surface (12); Step 5: Detect the maximum value of the distance from the lower surface (121) of the rudder surface (12) to the worktable surface (5) using the distance sensor (2), and subtract the distance from the upper surface of the rudder shaft to the worktable surface (5) from the maximum value to calculate the value of the folding gap. Step 6: Control the constant force output device (7) to stably output a set force to the air rudder (1) in the opposite direction to that in Step 4; repeat Step 5; obtain the value of the folding gap under the set force in the opposite direction; Step 7: Obtain the values ​​of the two folding gaps under the set forces in opposite directions, and compare these two values ​​with the set standard folding gap values ​​respectively: a. If the values ​​of both folding gaps are less than the set standard folding gap values, the air rudder (1) is a qualified product; b. If either of the two folding gap values ​​is greater than the set standard folding gap value, the air rudder (1) is a defective product; Step 8: This test is now complete.

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