CN102680194B - Vibration test stand of magnetic wave sensor antenna - Google Patents

Abstract

The invention relates to a magnetic wave sensor antenna vibration test frame. The magnetic wave sensor antenna vibration test frame is used to fix the magnetic wave sensor antenna on the vibration test platform, and includes: a side plate (13) and an installation fulcrum (2); the test frame also Including the bottom plate (18); the bottom plate (18) and the side plate (13) are perpendicular to each other and are L-shaped; the bottom plate (18) is provided with a bottom installation through hole (11); the side plate (13) passes through the bottom plate (18) ) Fix the component under test on the vibration test platform along three orthogonal directions. It fills a gap in the ring die test equipment, and is suitable for three-dimensional vibration test of the same type of tested parts. The bracket is easy to use, the installation position of the tested piece is accurate, and the direction conversion is simple. The high-frequency resonance interference and secondary interference intensity of the test frame itself is low, which has little influence on the test data of the tested piece. In the sinusoidal vibration and random vibration test results The high frequency spectrum interfering noise in the medium can be completely ignored.

Description

A magnetic wave sensor antenna vibration test frame

technical field

The invention relates to a test frame, in particular to a magnetic wave sensor antenna vibration test frame.

Background technique

The magnetic wave sensor antenna of the space low-frequency wave detector is usually installed on the top of the extension rod protruding from the satellite body and the length is more than twice the diameter of the satellite load compartment body, away from the interference source of the satellite body. Before the satellite is launched into the orbit, the extension rod body is supported by the support in a bent shape and locked on the top of the support. When launching, the satellite body is subjected to strong vibration, which doubles the amplitude of the sensor at the end of the extension rod away from the restraint point of the support and destructs the resonance phenomenon, so that the acceleration extreme value in the vibration spectrum reaches more than 2 times that of the star body, and the peak value of the sinusoidal acceleration can exceed 40g , if not controlled, will seriously damage the sensor and rod structure. Therefore, in the ground ring mold test stage, strict simulation amplitude amplification and other tests must be done. In addition to being bulky and unfavorable for simulation tests, the general-purpose test vibrating frame cannot directly load the magnetic wave sensor antenna with three vertical components, and it is difficult to avoid interference problems such as high-order harmonic waves.

Contents of the invention

The object of the present invention is, in order to realize above-mentioned problem, design a kind of magnetic wave sensor antenna vibration test stand that is suitable for the satellite space wave detector sensor with special structure to use in 40g acceleration vibration test.

In order to achieve the purpose of the above invention, a magnetic wave sensor antenna vibration test frame is proposed. The magnetic wave sensor antenna vibration test frame is used to fix the magnetic wave sensor antenna on the vibration test platform, including: side plate 13 and installation fulcrum 2;

It is characterized in that the test frame also includes a bottom plate 18; the bottom plate 18 is perpendicular to the side plate 13 and is L-shaped; the bottom plate 18 is provided with a bottom installation through hole 11; the side plate 13 Fix the component under test on the vibration test platform in three orthogonal directions through the bottom plate 18. An oval through hole 5 is provided at the center of the side plate 13 .

The center of the elliptical through hole 5 is located 50mm directly above the center of the side plate 13; the hole area of the elliptical through hole 5 is not less than 1/4 of the area of the upper surface 16 of the side plate.

The installation fulcrum 2 is in the shape of a truncated cone, and the installation fulcrum 2 is arranged on the surface of the side plate 13 facing the component under test; the top of the installation fulcrum 2 is provided with a fulcrum screw hole 17 .

The side plate 13 is provided with a plurality of installation through holes 4 surrounding the elliptical through hole 5 .

The bottom of the side plate 13 is provided with a rectangular through hole 6 below the oval through hole 5, and a connecting rib 12 is arranged in the described rectangular through hole 6; The rectangular cross-section through holes 8 on both sides of 12 penetrate through the bottom plate portion 18 .

The section of the connecting rib 12 is prismatic.

The two corners of the top 15 of the side plate 13 are arc-shaped.

The invention has the advantage of filling a blank in the aspect of ring mold test equipment, and is suitable for the three-dimensional vibration test of the same type of tested parts. The bracket is easy to use, the installation position of the tested piece is accurate, and the direction conversion is simple. The high-frequency resonance interference and secondary interference intensity of the test frame itself is low, which has little influence on the test data of the tested piece. In the sinusoidal vibration and random vibration test results The high frequency spectrum interfering noise in the medium can be completely ignored.

Description of drawings

Fig. 1 is a kind of magnetic wave sensor antenna vibration test frame of the present invention.

Drawing logo:

1. L-shaped plate 2. Installation fulcrum 3. Arc angle 4. Installation through hole

5. Oval through hole 6. Rectangular through hole 7. Top surface of bottom plate 8. Rectangular section through hole

9. Back of L-shaped plate 10. Oval through hole wall 11. Bottom installation through hole 12. Connecting rib

13. Side plate 14. Bottom of bottom plate 15. Top of side plate 16. Top surface of side plate

17. Pivot screw hole 18. Bottom plate

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The present invention provides a vibration test frame for a magnetic wave sensor antenna, comprising: an L-shaped plate 1 and a mounting fulcrum 2; the L-shaped plate 1 is a three-dimensional folded plate structure with an L-shaped longitudinal section; the L-shaped plate 1 includes a side plate 13 and a bottom plate 18 two parts, the middle part of the side plate plane near the top of the side plate 15 has an oval through hole 5, four installation through holes 4 are opened around the oval through hole, and the four installation through holes are based on the longitudinal geometry of the side plate surface. The bisector is symmetrically distributed; the side plate also has a rectangular through hole 6 between the elliptical through hole 5 and the bottom plate, and the rectangular through hole is provided with a connecting rib 12 with a prismatic cross section and two rectangles connected to the bottom surface 14 of the bottom plate. Cross-section through hole 8; Described is positioned at the test frame base plate 18 and has two bottom installation through holes 11; Described installation fulcrum 2 is to surround 4 conical circular frustums around the ellipse through hole 5, and the conical circular frustum top is provided with There are fulcrum screw holes 17 for fixing the tested part;

In the above technical solution, the L-shaped plate 1 is made of metal aluminum, and the three-dimensional scale L1:L2:L3 ratio of the side plate 13 is: (25～32):(18～27):(4～6 ), wherein L1, L2 and L3 are the length, width and thickness of the side panel 13, respectively.

In the above technical solution, the ratio of the length, width and thickness of the bottom plate 18 is: (18-27): (6-11): (4-6). The thickness of the base plate 18 refers to the vertical distance between the two planes, the base plate top 7 and the base plate bottom 14 .

In the above technical solution, the taper angle of the main axial section of the conical cap-shaped circular truncated fulcrum 2 is 30°-70°.

In the above technical solution, the radius of the arc angle 3 is greater than or equal to 1/8 of the width L2 of the L-shaped plate.

In the above technical solution, the hole area of the elliptical through hole 5 is not less than 1/4 of the area of the upper surface 16 of the side plate of the L-shaped plate.

In the above technical solution, the width of the bottom plate 18 of the L-shaped plate is not less than 1/10 of the length of the side plate of the L-shaped plate.

In the above technical solution, the height of the installation fulcrum 2 of the frustum of a cone is 30mm-40mm.

The present invention can be realized through the following technical solutions. First select the model LY-12 aluminum plate with a size of about 310mm×220mm×80mm, and remove a part of the aluminum plate with a size of 265mm×220mm×35mm, so that the remaining part becomes an L-shaped three-dimensional structure with a longitudinal section. L-shaped plate 1 15mm installation through holes 4 with a diameter of 15mm are provided at 4 symmetrical positions with a pitch of 220mm×185mm on the upper surface 16 of the side plate. Taking the geometric bisector in the length direction of the upper surface 16 of the side plate as the center line of symmetry, mill out an elliptical through hole 5 with a long and short axis of 160mm×130mm on the plane of the L-shaped plate 1, and its center position deviates from the top of the plate in the length direction The center of the plate is 50mm, and there is one (60±5)mm×(140±15)mm rectangular through-hole 6 between the elliptical through-hole 5 and the top surface 7 of the bottom plate. The side wall 10 is about 30mm, and the other side wall of the rectangular through hole 6 is located in the plane of the top surface 7 of the bottom plate. There are two rectangular cross-section through holes 8 for vertical installation between the plane where the bottom surface 14 of the bottom plate is located. The rectangular cross-section through holes have a cross-section of 25mm×13mm. The bottom of azimuth installation installs through hole 11. With the center of the elliptical through hole 5 of the side plate as the center of symmetry, there are 4 positions of 130 mm × 130 mm provided with an aluminum round table part protruding from the upper surface of the side plate 12 of the side plate 16 by about (35 ± 5) mm. The four installation fulcrums 2 of the sensor, the upper and bottom diameters of the frustum-shaped installation fulcrums 2 are Φ18mm and Φ35mm respectively. In order to reduce high-order resonance interference, the arc angle 3 is processed into an arc angle of R≥50mm.

The four installation through holes 4 are the mounting holes for the L-shaped plate to be fixed on the vibration test platform. At this time, the back 9 of the L-shaped plate is the surface directly contacting the entire L-shaped plate with the vibration test platform; The through holes 8 and the bottom installation through holes 11 make the L-shaped plate upright and fixed on the vibration test platform. At this time, the bottom surface 14 of the bottom plate is the installation surface.

Since the vibration direction of the general-purpose vibration test platform vibrates along a single vertical direction, it is only possible to test the component under test in a three-dimensional coordinate orientation through the vibration bracket and different installation orientations of the component under test. The tested component can be tested by fixing the four mounting feet corresponding to the four mounting fulcrums 2 that are arranged in a square with bolts to the mounting fulcrums 2 respectively. The test performed when the back 9 of the L-shaped board is used as the mounting surface is the The first orientation test of the component under test; for the case where the bottom surface 14 of the base plate is the mounting surface, the four fulcrum screw holes 17 are on the same vertical plane at this time, and the component under test is fixed on the four mounting fulcrums 2 through the four mounting feet. The test of the second orientation can be realized above, and then the test of the third orientation can be realized by rotating and fixing the component under test by 90 degrees relative to the vertical line of the plane of the side plate 13, so that the component under test can be tested along the three Orthogonal direction is fixed on the vibration test platform for omni-directional testing.

The maximum width of the prismatic section connecting rib 12 formed by direct processing is 30 mm.

The vibration test in the three-dimensional coordinate direction can be realized by rotating the sensor on the bracket at an angle of 90 degrees and installing it in position.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all of them should be included in the scope of the present invention. within the scope of the claims.

Claims (8)

1. A magnetic wave sensor antenna vibration test frame, the magnetic wave sensor antenna vibration test frame is used to fix the magnetic wave sensor antenna on the vibration test platform, including: side plate (13) and installation fulcrum (2); It is characterized in that the test frame also includes a bottom plate (18); the bottom plate (18) is perpendicular to the side plate (13) and is L-shaped; the bottom plate (18) is provided with a bottom installation channel hole (11); the side plate (13) fixes the tested component on the vibration test platform along three orthogonal directions through the bottom plate (18). 2. The magnetic wave sensor antenna vibration test stand according to claim 1, characterized in that an elliptical through hole (5) is provided at the center of the side plate (13). 3. The magnetic wave sensor antenna vibration test stand according to claim 2 is characterized in that, the center of the described ellipse through hole (5) is positioned at the 50mm place directly above the center of the described side plate (13); The hole area of the through hole (5) is not less than 1/4 of the area of the upper surface (16) of the side plate. 4. The magnetic wave sensor antenna vibration test stand according to claim 1, characterized in that, the installation fulcrum (2) is in the shape of a circular platform, and the installation fulcrum (2) is arranged on the side plate (13) toward the tested On the surface of the component; the top of the mounting fulcrum (2) is provided with a fulcrum screw hole (17). 5. The magnetic wave sensor antenna vibration test stand according to claim 1 or 2, characterized in that, said side plate (13) is provided with several installation through holes (4) surrounding said elliptical through hole (5 )around. 6. the magnetic wave sensor antenna vibration test frame according to claim 1, is characterized in that, the bottom of described side plate (13) is provided with rectangular through hole (6) in the below of oval through hole (5), and described A connecting rib (12) is provided in the rectangular through hole (6); the rectangular section through hole (8) symmetrical to the both sides of the connecting rib (12) is opened in the described rectangular through hole (6) and runs through the bottom plate part ( 18). 7. The magnetic wave sensor antenna vibration test stand according to claim 6, characterized in that, the section of the connecting rib (12) is prismatic. 8. The magnetic wave sensor antenna vibration test stand according to claim 1, characterized in that, the two corners of the top (15) of the side plate (13) are arc-shaped.