Control surface deflection angle automatic acquisition device

Abstract

The invention discloses a control surface deflection angle automatic acquisition device, which comprises four angular displacement sensors arranged in a rectangular shape, couplings fixed at one ends of the angular displacement sensors through screws, and sensor cables connected to the other ends of the angular displacement sensors, an inner support, a connecting plate and a bearing are sequentially arranged on the circumference of the joint of the coupling and the angular displacement sensor to form a fastening device; a seat tube clamp wraps the outer end face of the circumference of the coupler, single-lining type flange linear bearings are arranged on the inner end faces of the four opposite inner supports, and the opposite single-lining type flange linear bearings are connected through a fixing frame. The automatic acquisition device realizes the automatic test of the deflection angle of the control surface, can complete the deflection angle test of four control surfaces at the same time, and greatly improves the efficiency and accuracy.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology, and in particular relates to a device for automatically collecting the deflection angle of a control surface. Background Art

[0002] The control mechanism of an aircraft is composed of a steering gear, a control surface, a cabin, and a rocker arm assembly. Its main function is to execute the stability and control instructions of the aircraft and ensure that the aircraft flies according to the predetermined trajectory. The assembly quality of the control mechanism and the performance of the steering gear are not guaranteed to meet the design requirements. After the assembly of the control mechanism is completed, the system needs to be tested. By applying control instructions to the steering gear, the deflection angle of the control surface is collected to determine whether it is consistent with the control instruction preset angle, and whether the quality of the control mechanism meets the technical requirements.

[0003] The existing rudder surface deflection angle collection is mainly completed by the cooperation of protractor and vernier, such as Figure 1 and Figure 2 As shown, a cursor is installed on the rudder surface, a protractor is installed on the cabin, and the cursor is adjusted while the rudder surface is moved so that the rudder surface zero position, the protractor zero position, and the cursor zero position are on the same straight line. When the servo receives a control command, the servo connecting rod is displaced under the control command, driving the rudder surface to deflect. The rudder surface deflection angle is recorded by reading the cursor indication on the protractor.

[0004] The method of reading with a protractor is intuitive and easy to understand, such as the Chinese invention patent with publication number CN111483613B. However, the degree of automation is not high, the production efficiency is low, and the skill level of the operator is high. It can no longer meet the needs of digital and intelligent assembly and debugging of missiles, which is mainly reflected in:

[0005] 1) The accuracy of the protractor and vernier is not high enough, resulting in large reading errors;

[0006] 2) The fixture clamping time is long, and the clamping reference is aligned visually, resulting in large errors;

[0007] 3) This method is manual reading, with large errors, and requires fast data reading, which is prone to errors. Once the data is read incorrectly, the test needs to be repeated, affecting the production progress;

[0008] 4) Each test can only complete two rudder surfaces, and one product needs to repeat the work twice, which is inefficient;

[0009] 5) A single test requires at least three operators to cooperate simultaneously, and the operators are required to have a high level of skill and proficiency, resulting in high labor costs. Summary of the invention

[0010] In order to solve the above problems, the present invention aims to provide a device for automatically collecting the deflection angle of a rudder surface.

[0011] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a device for automatically collecting the deflection angle of a rudder surface, comprising four angular displacement sensors arranged in a rectangular shape, a coupling fixed to one end of the angular displacement sensor by screws, a sensor cable connected to the other end of the angular displacement sensor, and an inner support, a connecting plate and a bearing are sequentially arranged on the circumference of the connection between the coupling and the angular displacement sensor to form a fastening device;

[0012] The outer circumferential end of the coupling is covered with a seat tube clamp, and the inner end surfaces of four opposite inner supports are provided with single-lined flange linear bearings, and the opposite single-lined flange linear bearings are connected by a fixing frame.

[0013] Furthermore, the contact of the angular displacement sensor is "D"-shaped, and the preferred model is MCGJ500B-90-38BCP.

[0014] Furthermore, the coupling is a flexible coupling, the coupling and the contacts of the angular displacement sensor are interlaced and nested, a stopper is installed at the other end of the coupling, and the outer end surfaces of the coupling and the stopper are covered with a sleeve.

[0015] Furthermore, the inner support is a flange structure composed of a disk body and a neck, which is circular as a whole, with a circular hole in the middle and a special-shaped concave surface on the disk body;

[0016] The bearing is an annular structure, and its outer ring is interference fit with the neck of the inner support;

[0017] The connecting plate is a special-shaped plate with a circular hole in the middle. The contour of the special-shaped plate matches the special-shaped concave surface of the inner support. The radius of the circular hole in the connecting plate is smaller than the radius of the circular hole in the inner support.

[0018] Furthermore, the seat tube clamp is a quick-release seat tube clamp, which includes an annular body and an adjustable bolt connecting the annular body, and the inner ring of the seat tube clamp is sleeved on the outer end surface of the coupling to wrap and clamp it.

[0019] Furthermore, the single-liner flange linear bearing includes a base and a connecting tube perpendicular to the base, circular holes are provided on the connecting tube and the base, and a mounting hole is also provided on the base.

[0020] Furthermore, the fixing frame is tubular, and is connected through the single-liner flange linear bearing connecting tube and the circular hole opened on the base.

[0021] Furthermore, the fixing frame adopts a φ8mm cylindrical linear guide rail, whose hardness is not less than HRC62 and whose straightness does not exceed 5um at 100mm.

[0022] Furthermore, the base of the single-liner flange linear bearing is fitted on the disc body of the inner support, and a screw integrally connected with the suction cup is provided to pass through the mounting hole of the base of the single-liner flange linear bearing for fixing.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. The range and accuracy of data collection by this device are greatly improved, and the collection accuracy is improved from 0.2° to 0.1°; the test time of a single product is shortened from 60s to 90s (affected by the model and personnel proficiency) to 25s to 35s, shortening the test time and improving production efficiency; automatic measurement of deflection angle is achieved with an accuracy of 100%; manual reading errors are eliminated, quality consistency is improved, and the number of operators is reduced from 3 to 2, reducing labor costs.

[0025] 2. The device needs to use a flexible coupling for angle transmission, and allows axial deviation within a certain range during installation, which is convenient for installation and adjustment, while reducing the impact and vibration of the angular displacement sensor and increasing the service life of the equipment; the automatic acquisition device realizes automatic testing of the deflection angle of the rudder surface, and can complete the deflection angle test of 4 rudder surfaces at the same time, greatly improving efficiency and accuracy.

[0026] 3. The minimum straightness and material rigidity requirements of the fixed frame must meet special requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the existing control surface deflection angle acquisition device in the present invention;

[0029] Figure 2 It is a measurement schematic diagram of the existing control surface deflection angle acquisition device in the present invention;

[0030] Figure 3 It is a schematic diagram of the overall structure of the automatic collection device for the deflection angle of the rudder surface in the present invention;

[0031] Figure 4 It is a schematic diagram of the seat tube clamp structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the inner support structure in the present invention;

[0033] Figure 6 It is a schematic diagram of the connecting plate structure in the present invention;

[0034] Figure 7 It is a schematic diagram of the bearing structure in the present invention;

[0035] Figure 8 It is a schematic diagram of the assembly of the inner support, the connecting plate and the bearing in the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure of the angular displacement sensor in the present invention;

[0037] Fig.10 Schematic diagram of the connection between the flexible coupling and the angular displacement sensor in the present invention Figure 1 ;

[0038] Fig.11 Schematic diagram of the connection between the flexible coupling and the angular displacement sensor in the present invention Figure 2 ;

[0039] Fig.12 This is a schematic diagram of the structure of a single-lined flange linear shaft in the present invention;

[0040] Fig.13 It is a schematic diagram of the connection between the single-line flange linear bearing and the fixing frame in the present invention;

[0041] In the figure, 1-seat tube clamp; 2-inner support; 3-connecting plate; 4-single liner flange linear bearing; 5-fixed frame; 6-bearing; 7-flexible connector; 8-angular displacement sensor; 9-sensor cable; 10-screw; 11-stopper; 12-sleeve. DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0043] Reference Figure 3 A device for automatically collecting the deflection angle of a rudder surface comprises four angular displacement sensors 8 arranged in a rectangular shape, a coupling 7 fixed to one end of the angular displacement sensor 8 by a screw 10, a sensor cable 9 connected to the other end of the angular displacement sensor 8, an inner support 6, a connecting plate 3 and a bearing 6 are sequentially arranged on the circumference of the connection between the coupling 7 and the angular displacement sensor 8 to form a fastening device; a seat tube clamp 1 is coated on the outer end surface of the circumference of the coupling 7, single-lined flange linear bearings 4 are arranged on the inner end surfaces of four opposite inner supports 6, and the opposite single-lined flange linear bearings are connected by a fixing frame 5.

[0044] Seat tube clamp 1 Figure 4As shown, it is the connection interface between the rudder angle automatic acquisition device and the tested rudder shaft. The seat tube clamp 1 adopts a quick-release seat tube clamp, which is easy to install and disassemble, and can adapt to the clamping requirements of rudder shafts of different sizes within a certain range. The clamping and fastening are reliable. Its structure includes an annular main body and an adjustable bolt connecting the annular main body. The inner ring of the seat tube clamp 1 is sleeved on the outer end surface of the coupling 7 to wrap and clamp it.

[0045] Inner support 2 Figure 5 As shown, it is a flange structure composed of a disk body and a neck, which is circular as a whole. A circular hole is opened in the middle. A special-shaped concave surface is provided on the disk body for installing the connecting plate 3 and the bearing 6. The bearing 6 and the inner support 2 are fitted by interference. The inner support 2 is designed with a special-shaped concave surface for installing the connecting plate. After the connecting plate is installed, it is flush with the end face of the inner support 2, thereby reducing the axial length of the automatic rudder deflection angle collection device.

[0046] Connecting plate 3 Figure 6 As shown, it is a special-shaped plate with a circular hole in the middle. The contour of the special-shaped plate matches the special-shaped concave surface of the inner support 2. The radius of the circular hole opened in the connecting plate 3 is smaller than the radius of the circular hole opened in the inner support 2. It is installed on the inner support 2 and is used to fix the angular displacement sensor 8; the bearing 6 is as shown in Figure 7 As shown, it is an annular structure, and its outer ring is interference fit with the neck of the inner support 2. The assembly diagram of the inner support 2, the connecting plate 3, and the bearing 6 is shown in Figure 8 shown.

[0047] Angular displacement sensor 7 Fig. 9 As shown, the model MCGJ500B-90-38BCP is selected according to the test product range requirements, power supply requirements, output mode, mechanical size, accuracy, etc. The contact of the angular displacement sensor 7 is processed into a "D" shape to achieve docking and tightening with the flexible coupling 7.

[0048] The coupling 7 adopts a flexible coupling, which uses its elastic deformation to compensate for the relative displacement of the sensor angle transmission shaft and the transmission shaft on the connecting plate, mitigate impact and absorb vibration, and achieve the effect of compensating angular, radial and axial deviations. Fig.10 and 11 , and tightened by the screws on the flexible coupling 7 to further ensure the coaxiality of the two shafts. A stopper is installed at the rear end of the flexible coupling 7 to prevent the flexible coupling 7 from moving outward. The outer end of the coupling 7 and the stopper 11 is covered with a sleeve 12.

[0049] Single-line flange linear bearing 4 and fixing bracket 5: The use of linear bearing 4 is the key to the installation of the rudder deflection automatic acquisition device in the servo frame on the cabin, such as Fig.12 and 13As shown, the linear bearing 4 can adjust the extension and contraction of the fixed frame within its travel range. When the fixed frame contracts, the rudder deflection angle automatic acquisition device can be placed in the steering gear frame as a whole to ensure that there is a certain operating space during installation; when the seat tube clamp 1 and the rudder shaft are fixed, the fixed frame 5 can be stretched, and the fixed frames 5 support and clamp each other to ensure the stability of the fixed frame. The fixed frame adopts a φ8mm cylindrical linear guide rail, whose hardness is not less than HRC62 and the straightness 100mm does not exceed 5um.

[0050] The single-line flange linear bearing 4 includes a base and a connecting tube perpendicular to the base, with circular holes provided on the connecting tube and the base, and a mounting hole provided on the base. The fixing frame 5 is tubular, and the fixing frame is connected through the circular holes provided on the connecting tube and the base of the single-line flange linear bearing 4. The base of the single-line flange linear bearing 4 is fitted on the disc body of the inner support 2, and a screw integrally connected to the suction cup is provided to pass through the mounting hole of the base of the single-line flange linear bearing 4 for fixing.

[0051] This solution uses four 0.5‰ high-precision angular displacement sensors to collect the rudder deflection angle by clamping them at one time. The rudder deflection angle data is collected through an AD acquisition board with 16-bit conversion resolution and corresponding software, and then the accuracy of the test calibration data is analyzed and judged.

[0052] The angular displacement sensor selected is MCGJ500B-90-38BCP, which is powered by DC 24V, has an angular displacement range of 0°~90°, a signal output of 0~10V analog voltage, and a linearity of ±0.6‰. In the nominal angle range (0°~68°), the signal changes linearly. When the rudder drives the angular displacement sensor to rotate, the output signal increases with the increase of the angle.

[0053] The linear relationship between the deflection angle of the rudder surface and the output voltage of the angular displacement sensor satisfies the following test results:

[0054] y=0.111x+4.980

[0055] Where: x is the deflection angle of the rudder surface; y is the sensor voltage.

[0056] The above is a detailed introduction to the automatic collection device for the deflection angle of the rudder surface provided by the present invention. The structure and working principle of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for automatically collecting the deflection angle of a rudder surface, characterized in that: The invention comprises four angular displacement sensors (8) arranged in a rectangular shape, a coupling (7) fixed to one end of the angular displacement sensor (8) by means of a screw (10), a sensor cable (9) connected to the other end of the angular displacement sensor (8), and an inner support (6), a connecting plate (3) and a bearing (6) are sequentially arranged on the circumference of the connection between the coupling (7) and the angular displacement sensor (8) to form a fastening device; The outer end of the circumference of the coupling (7) is covered with a seat tube clamp (1), and the inner end surfaces of four opposite inner supports (6) are provided with single-lined flange linear bearings (4), and the opposite single-lined flange linear bearings are connected by a fixing frame (5).

2. The automatic collection device for the deflection angle of the rudder surface according to claim 1 is characterized in that: The contact of the angular displacement sensor (8) is "D" shaped, with an accuracy of 0.5‰, and the preferred model is MCGJ500B-90-38BCP.

3. The automatic acquisition device for the deflection angle of the rudder surface according to claim 1 is characterized in that: The coupling (7) is a flexible coupling. The coupling (7) and the contact of the angular displacement sensor (8) are interlaced and nested. A stopper (11) is installed at the other end of the coupling (7), and the outer end surfaces of the coupling (7) and the stopper (11) are covered with a shaft sleeve (12).

4. The automatic collection device for the deflection angle of the rudder surface according to claim 3 is characterized in that: The inner support (2) is a flange structure composed of a disk body and a neck, and is in a circular shape as a whole. A circular hole is provided in the middle, and a special-shaped concave surface is provided on the disk body. The bearing (6) is an annular structure, and its outer ring is interference fit with the neck of the inner support (2); The connecting plate (3) is a special-shaped plate with a circular hole in the middle, the contour of the special-shaped plate matches the special-shaped concave surface of the inner support (2), and the radius of the circular hole formed in the connecting plate (3) is smaller than the radius of the circular hole formed in the inner support (2).

5. The automatic acquisition device for the deflection angle of the rudder surface according to claim 1 is characterized in that: The seat tube clamp (1) is a quick-release seat tube clamp, which comprises an annular main body and an adjustable bolt connecting the annular main body. The inner ring of the seat tube clamp (1) is sleeved on the outer end surface of the coupling (7) to wrap and clamp it.

6. The automatic acquisition device for the deflection angle of the rudder surface according to claim 1 is characterized in that: The single-liner flange linear bearing (4) comprises a base and a connecting tube perpendicular to the base, circular holes are provided on the connecting tube and the base, and a mounting hole is also provided on the base.

7. The automatic acquisition device for the deflection angle of the rudder surface according to claim 1 is characterized in that: The fixing frame (5) is tubular and passes through the connecting tube of the single-line flange linear bearing (4) and the circular hole opened on the base for connection.

8. The automatic collection device for the deflection angle of the rudder surface according to claim 7 is characterized in that: The fixing frame (5) adopts a φ8mm cylindrical linear guide rail, the hardness of which is not less than HRC62, and the straightness of which is not more than 5um at 100mm.

9. The automatic collection device for the deflection angle of the rudder surface according to claim 6, characterized in that: The base of the single-line flange linear bearing (4) is fitted on the disc body of the inner support (2), and a screw integrally connected with the suction cup is provided to pass through the mounting hole of the base of the single-line flange linear bearing (4) for fixing.

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