Four-axis turntable for aircraft simulation test

Abstract

The invention discloses a four-axis rotary table for aircraft simulation test, the four-axis rotary table comprises a three-axis rotary table, a platform support, a guide rail and a rotary platform, the three-axis rotary table is used for realizing three-degree-of-freedom motion; the platform support is arranged on the periphery of the three-axis rotary table. The guide rail is arranged on the platform support and is an arc-shaped guide rail with the position of the three-axis rotary table as the circle center. The rotating platform is movably arranged on the guide rail and rotates around the three-axis rotary table in the process of moving along the guide rail. The rotating platform moves along the arc-shaped guide rail with the three-axis rotating table as the circle center, the rotating platform rotates around the three-axis rotating table, the four-axis rotating table with the higher degree of freedom is formed through combination of the rotating platform and the three-axis platform, a high-power motor is not needed to drive the rotating platform to rotate, the structure is simple, use is convenient, and cost is low. And energy and cost can be saved.

Description

Technical Field

[0001] The invention relates to the technical field of simulation test turntables, and in particular to a four-axis turntable for aircraft simulation testing. Background Art

[0002] The simulation test turntable is a complex modern equipment integrating optics, machinery and electronics. It performs semi-physical simulation and testing in the fields of aviation and aerospace, and plays a key role in the development of aircraft. It can simulate various attitude angles of aircraft, reproduce various dynamic characteristics of its motion, repeatedly test the performance of the guidance system, control system and corresponding devices of the aircraft, obtain sufficient test data, and redesign and improve the system based on the data to meet the performance index requirements of the overall design of the aircraft.

[0003] The simulation test turntable has multiple branches, for example, it can be classified according to the energy type, control signal or degree of freedom of the servo system. As a branch of the simulation test turntable, the four-axis turntable generally has a higher degree of freedom and can more realistically simulate the various postures of the aircraft when flying in the air. However, the traditional structure of the four-axis turntable generally adopts the form of combining a rotating axis system with a frame structure to realize simulation testing. The system is complex, has strict requirements on the power of the motor, and is costly. Summary of the invention

[0004] The purpose of the present invention is to provide a four-axis turntable for aircraft simulation testing. In view of the problems that the traditional four-axis turntable system is complex, has strict requirements on the power of the motor and is relatively high in cost, the rotating platform is moved along an arc guide rail with the three-axis turntable as the center to realize the rotation of the rotating platform around the three-axis turntable. The rotating platform and the three-axis platform are combined to form a four-axis turntable. There is no need for a high-power motor to drive the rotating platform to rotate, and the structure is simple and the cost is low.

[0005] In order to achieve the above objectives, the present invention provides a four-axis turntable for aircraft simulation testing, comprising:

[0006] A three-axis turntable, which is used to achieve three-degree-of-freedom motion;

[0007] A platform bracket, the platform bracket is arranged on the periphery of the three-axis turntable;

[0008] A guide rail, the guide rail being provided to the platform bracket and being constructed as an arc-shaped guide rail with the position of the three-axis turntable as the center; and

[0009] A rotating platform is movably arranged on the guide rail and rotates around the three-axis turntable during movement along the guide rail.

[0010] Optionally, the four-axis turntable further comprises a base plate, and the three-axis turntable and the platform bracket are both arranged on the base plate.

[0011] Optionally, a shim is provided between the three-axis turntable and the base plate.

[0012] Optionally, a height adjustment pad is provided between the platform bracket and the base plate.

[0013] Optionally, a guide rail seat is provided on the platform bracket, and the guide rail is provided to the guide rail seat;

[0014] The two ends of the guide rail seat are respectively provided with a first limiting mechanism and a second limiting mechanism for limiting the rotating platform.

[0015] Optionally, the platform bracket includes a platform base plate and a guide rail mounting plate, the platform base plate is arranged to the base plate, the guide rail seat is arranged to the guide rail mounting plate, and the platform base plate and the guide rail mounting plate are connected by a profile.

[0016] Optionally, rollers are provided below the platform bottom plate.

[0017] Optionally, the platform base plate and the guide rail mounting plate are both constructed as arc-shaped flat plates with the position of the three-axis turntable as the center of the circle.

[0018] Optionally, the three-axis turntable comprises:

[0019] Base;

[0020] A first rotating shaft, which is rotatably disposed at an upper end of the base and is rotatable relative to the base around a first rotation axis;

[0021] A first bracket, the first bracket is arranged at an upper end of the first rotating shaft;

[0022] a second bracket, the second bracket being arranged inside the first bracket, second rotating shafts being arranged on both sides of the second bracket, the second rotating shafts being rotatably connected to both sides of the first bracket, so that the second bracket is rotatable relative to the first bracket around a second rotation axis; and

[0023] a third rotating shaft, the third rotating shaft being rotatably disposed at one end of the second bracket and being rotatable relative to the second bracket around a third rotation axis, and a clamp being disposed at one end of the third rotating shaft;

[0024] The second rotation axis is perpendicular to the first rotation axis; and the third rotation axis is perpendicular to the first rotation axis and the second rotation axis.

[0025] Optionally, a counterweight is provided at one end of the second bracket opposite to the third rotating shaft.

[0026] Compared with the prior art, the present invention has at least the following technical effects:

[0027] By moving the rotating platform along an arc guide rail with the three-axis turntable as the center, the rotating platform can rotate around the three-axis turntable. The combination of the rotating platform and the three-axis platform forms a four-axis turntable with a higher degree of freedom. There is no need for a high-power motor to drive the rotating platform to rotate. The structure is simple, easy to use, and conducive to saving energy and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are an embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0029] Figure 1 It is a three-dimensional schematic diagram of a four-axis turntable according to a specific embodiment of the present invention;

[0030] Figure 2 A three-dimensional schematic diagram of a platform bracket according to a specific embodiment of the present invention;

[0031] Figure 3 It is a three-dimensional schematic diagram of a three-axis turntable according to a specific embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 100: Four-axis turntable

[0034] 10: Three-axis turntable

[0035] 11: Base

[0036] 12: First axis

[0037] 13: First bracket

[0038] 14: Second bracket

[0039] 15: Second axis

[0040] 16: The third axis

[0041] 17: Fixture

[0042] 18: Counterweight

[0043] 20: Platform bracket

[0044] 21: Platform base

[0045] 22: Guide rail mounting plate

[0046] 23: Profile

[0047] 24: Roller

[0048] 25: Vertical bar

[0049] 26: Crossbar

[0050] 30: Guide rail

[0051] 31: Guide rail seat

[0052] 32: The first limit mechanism

[0053] 33: Second limit mechanism

[0054] 40: Bottom plate

[0055] 41: shim

[0056] 42: Heightening pad

[0057] 50: Rotating Platform

[0058] RA1: First axis of rotation

[0059] RA2: Second axis of rotation

[0060] RA3: Third axis of rotation DETAILED DESCRIPTION

[0061] The following is a further detailed description of a four-axis turntable for aircraft simulation testing proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the accompanying drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0062] This embodiment provides a four-axis turntable 100, such as Figure 1As shown, the four-axis turntable 100 includes a three-axis turntable 10, a platform bracket 20, a guide rail 30 and a rotating platform 50. The three-axis turntable 10 is used to achieve three-degree-of-freedom motion. The platform bracket 20 is set to the periphery of the three-axis turntable 10. The guide rail 30 is set to the platform bracket 20 and is constructed as an arc-shaped guide rail with the position of the three-axis turntable 10 as the center. The rotating platform 50 is movably set to the guide rail 30, and rotates around the three-axis turntable 10 while moving along the guide rail 30.

[0063] like Figure 1 As shown, the four-axis turntable 100 also includes a bottom plate 40, and the three-axis turntable 10 and the platform bracket 20 can be set to the bottom plate 40. For example, a shim 41 can be set between the bottom of the three-axis turntable 10 and the upper surface of the bottom plate 40. A plurality of shims 41 can be evenly arranged between the three-axis turntable 10 and the bottom plate 40. On the one hand, they can be used to support the weight of the three-axis turntable 10, prevent the transmission of vibration force, play a shock-absorbing function, and ensure the movement accuracy of the three-axis turntable 10. On the other hand, they can also be used to adjust the horizontal height of the three-axis turntable 10.

[0064] For example, a height adjustment pad 42 may be provided between the bottom of the platform bracket 20 and the upper surface of the bottom plate 40, and a plurality of height adjustment pads 42 may be evenly provided between the platform bracket 20 and the bottom plate 40. The height adjustment pad 42 may be used to adjust the horizontal height of the platform bracket 20.

[0065] Specifically, Figure 2 As shown, the platform bracket 20 includes a platform bottom plate 21 and a guide rail mounting plate 22. The platform bottom plate 21 is arranged on the bottom plate 40, and the guide rail seat 31 is arranged on the guide rail mounting plate 22. The platform bottom plate 21 and the guide rail mounting plate 22 are connected by a profile 23.

[0066] The profile 23 includes a plurality of vertical rods 25 arranged longitudinally, and the two ends of the vertical rods 25 are respectively connected to the platform base plate 21 and the guide rail mounting plate 22, for example, by screws. The profile 23 also includes a plurality of transversely arranged cross bars 26, each of which is arranged between two of the vertical rods 25, and a plurality of cross bars 26 can be arranged between two of the vertical rods 25, for ensuring the stability of the overall structure of the profile 23. The profile 23 can be made of, for example, iron, steel or other metal materials with certain strength and toughness through processes such as rolling, extrusion, and casting. The profile 23 has a fixed appearance size, a certain cross-section shape, and certain mechanical and physical properties, which can save materials while ensuring the connection strength between the platform base plate 21 and the guide rail mounting plate 22.

[0067] A plurality of rollers 24 may be evenly arranged below the platform bottom plate 21 to facilitate the transportation of the platform bracket 20. In addition, the position of the platform bracket 20 relative to the three-axis turntable 10 may be easily adjusted so that the three-axis turntable 10 is located at the center of the guide rail 30, ensuring that the rotating platform 50 rotates around the three-axis turntable 10 when moving on the guide rail 30. The height adjustment pad 42 may be arranged between the bottom plate 40 and the platform bottom plate 21, and the platform bracket 20 may be fixed on the bottom plate 40 by making the height of the height adjustment pad 42 greater than the height of the roller 24.

[0068] Corresponding to the guide rail 30, the bottom plate 40 and the guide rail mounting plate 22 can both be constructed as arc-shaped flat plates with the position of the three-axis turntable 10 as the center, so as to ensure the positional relationship between the guide rail 30 and the three-axis turntable 10 and save costs.

[0069] like Figure 2 As shown, a guide rail seat 31 may be provided on the guide rail mounting plate 22 of the platform bracket 20, and the guide rail seat 31 may be constructed in the same arc shape as the guide rail 30, so as to facilitate the installation of the guide rail 30 to the guide rail seat 31. A first limiting mechanism 32 and a second limiting mechanism 33 may be provided at both ends of the guide rail seat 31, respectively, for limiting the rotating platform 50 to ensure that the rotating platform 50 does not separate from the guide rail 30 during movement.

[0070] Specifically, Figure 3 As shown, the three-axis turntable 10 includes a base 11, a first rotating shaft 12, a first bracket 13, a second bracket 14, a second rotating shaft 15 and a third rotating shaft 16.

[0071] The first rotating shaft 12 is rotatably disposed on the upper end of the base 11 and is rotatable around the first rotating axis RA1 relative to the base 11. The first bracket 13 is disposed on the upper end of the first rotating shaft 12, and the first bracket 13 may be configured in a U shape, for example.

[0072] The second bracket 14 can be arranged on the inner side of the first bracket 13, and second rotating shafts 15 are arranged on both sides of the second bracket 14. The second rotating shafts 15 are rotatably connected to both sides of the first bracket 13, and the inner end surfaces of the second rotating shafts 15 can be connected to the second bracket 14, so that the second bracket 14 can rotate around the second rotation axis RA2 relative to the first bracket 13.

[0073] The third rotating shaft 16 is rotatably disposed at one end of the second bracket 14, and is rotatable relative to the second bracket 14 around the third rotation axis RA3. A clamp 17 is disposed at one end of the third rotating shaft 16. In order to balance the weight of the clamp 17 and the third rotating shaft 16, ensure the stable operation of the three-axis turntable 10, and avoid affecting the motion accuracy, a counterweight 18 may be disposed at one end of the second bracket 14 opposite to the third rotating shaft 16.

[0074] like Figure 3 As shown, the second bracket 14 may be configured as a U-shape, for example, and the counterweight 18 may be disposed on both sides of the end of the second bracket 14 opposite to the third rotating shaft 16 to improve the overall balance of the second bracket 14 and ensure the stability of the second bracket 14 when rotating relative to the first bracket 13. The counterweight 18 may be detachably mounted to the second bracket 14 by screws or other means, so that different counterweights 18 may be replaced according to the different weights of the clamp 17.

[0075] In order to realize the rotation of the three-axis turntable 10 in three different directions, the second rotation axis RA2 is perpendicular to the first rotation axis RA1, and the third rotation axis RA3 is perpendicular to the first rotation axis RA1 and the second rotation axis RA2. By making the three-axis turntable 10 have three degrees of freedom of angular motion, the three angular motion postures of the aircraft can be simulated. By making the rotating platform 50 move along the guide rail 30, the movement of the tracking target of the aircraft can be further simulated.

[0076] The present invention realizes the movement of the rotating platform around the three-axis turntable by moving the rotating platform along an arc guide rail with the three-axis turntable as the center. A four-axis turntable with a higher degree of freedom is formed through the combination of the rotating platform and the three-axis platform. There is no need for a high-power motor to drive the rotating platform to rotate. The present invention has a simple structure, is easy to use, is conducive to saving energy and costs, and is a significant improvement over the prior art.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0078] In the description of the present invention, it should be understood that the terms "center", "height", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0079] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0081] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A four-axis turntable for aircraft simulation testing, characterized in that: include: A three-axis turntable, which is used to achieve three-degree-of-freedom motion; A platform bracket, the platform bracket is arranged on the periphery of the three-axis turntable; A guide rail, the guide rail is arranged on the platform bracket and is constructed as an arc-shaped guide rail with the position of the three-axis turntable as the center of the circle; and A rotating platform is movably arranged on the guide rail and rotates around the three-axis turntable during movement along the guide rail.

2. The four-axis turntable according to claim 1, characterized in that: The four-axis turntable also includes a base plate, and the three-axis turntable and the platform bracket are both arranged on the base plate.

3. The four-axis turntable according to claim 2, characterized in that: A shim is arranged between the three-axis turntable and the bottom plate.

4. The four-axis turntable according to claim 2, characterized in that: A height adjustment pad is arranged between the platform bracket and the bottom plate.

5. The four-axis turntable according to claim 2, characterized in that: A guide rail seat is provided on the platform bracket, and the guide rail is provided to the guide rail seat; The two ends of the guide rail seat are respectively provided with a first limiting mechanism and a second limiting mechanism for limiting the rotating platform.

6. The four-axis turntable according to claim 5, characterized in that: The platform bracket includes a platform base plate and a guide rail mounting plate. The platform base plate is arranged on the base plate, and the guide rail seat is arranged on the guide rail mounting plate. The platform base plate and the guide rail mounting plate are connected by a profile.

7. The four-axis turntable according to claim 6, characterized in that: Rollers are arranged below the platform bottom plate.

8. The four-axis turntable according to claim 6, characterized in that: The platform bottom plate and the guide rail mounting plate are both constructed as arc-shaped flat plates with the position of the three-axis turntable as the center of the circle.

9. The four-axis turntable according to claim 1, characterized in that: The three-axis turntable comprises: Base; A first rotating shaft, which is rotatably disposed at an upper end of the base and is rotatable relative to the base around a first rotation axis; A first bracket, the first bracket is arranged at an upper end of the first rotating shaft; a second bracket, the second bracket being arranged inside the first bracket, second rotating shafts being arranged on both sides of the second bracket, the second rotating shafts being rotatably connected to both sides of the first bracket, so that the second bracket is rotatable relative to the first bracket around a second rotation axis; and a third rotating shaft, the third rotating shaft being rotatably disposed at one end of the second bracket and being rotatable relative to the second bracket around a third rotation axis, and a clamp being disposed at one end of the third rotating shaft; The second rotation axis is perpendicular to the first rotation axis; and the third rotation axis is perpendicular to the first rotation axis and the second rotation axis.

10. The four-axis turntable according to claim 9, characterized in that: A counterweight is disposed at one end of the second bracket opposite to the third rotating shaft.

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