CN216246396U - Three-self laser inertial measurement unit efficient vibration reduction system - Google Patents
Three-self laser inertial measurement unit efficient vibration reduction system Download PDFInfo
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- CN216246396U CN216246396U CN202122398583.6U CN202122398583U CN216246396U CN 216246396 U CN216246396 U CN 216246396U CN 202122398583 U CN202122398583 U CN 202122398583U CN 216246396 U CN216246396 U CN 216246396U
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Abstract
The utility model discloses a high-efficiency vibration reduction system of a three-self laser inertial set, which is arranged at four points on the waist part of the mass center plane of the three-self laser inertial set, wherein each point is combined by two vibration absorbers, and the two vibration absorbers are combined through clearance fit of pin holes.
Description
Technical Field
The utility model belongs to the field of laser inertial measurement units, and particularly relates to a three-self laser inertial measurement unit efficient vibration reduction system.
Background
The three-self laser inertial measurement unit is used as a key single machine of a control system, and has the main function of measuring the linear acceleration and the angular velocity of a carrier and obtaining the variation of the position posture of the carrier after integration, thereby realizing navigation and guidance control. The three-self laser inertial measurement unit comprises an inertial sensing component, a transposition and locking mechanism, a power circuit, an information processing control circuit and the like, wherein the inertial sensing component mainly comprises a laser gyroscope, an accelerometer and related circuits, and the function of measuring apparent speed increment and angle increment of a carrier in three directions in real time is realized.
Along with the three-self laser inertia unit flight environment is increasingly severe, and the three-self laser inertia unit has higher and higher miniaturization requirements, a novel vibration reduction system needs to be researched to resist the large-magnitude flight environment and meet the miniaturization requirements. In order to ensure the adaptability and reliability of an inertial instrument and an inertial unit circuit in an inertial sensitive component to a mechanical environment, four groups of T-shaped rubber shock absorbers are adopted as an external shock absorption system of the inertial unit to resist a large-magnitude flight environment. The T-shaped rubber shock absorber is adopted as an external shock absorption system of the inertial set, linear-angular coupling is easily caused due to the size limitation of a shock absorber sleeve, so that the dynamic characteristic of the inertial set is poor, the shock absorption stroke is small, the capability of absorbing vibration energy is poor, and the accumulated error caused by the integration of an inertial instrument influences the navigation precision of the inertial set.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and provides a high-efficiency vibration damping system of a three-self laser inertial set, wherein four points are arranged at the waist part of the mass center plane of the three-self laser inertial set, each point is combined by two vibration dampers, and the two vibration dampers are combined through pin hole clearance fit.
In order to realize the purpose of the utility model, the utility model provides the following technical scheme:
a three-self laser inertial measurement unit efficient vibration reduction system comprises 4 sets of vibration reducer sets arranged on inertial measurement unit mounting lugs, wherein each set of vibration reducer set comprises a first vibration reducer and a second vibration reducer;
the first damper includes a first metal core and a first damping rubber; the second damper includes a second metal core and a second damper rubber;
the first metal core is arranged in the first vibration damping rubber, and the second metal core is arranged in the second vibration damping rubber; the first metal core is provided with a pin, the second metal core is provided with a hole, and the pin of the first metal core is matched with the hole of the second metal core to realize the matching of the first damper and the second damper.
Furthermore, each group of shock absorber sets also comprises a first shock absorber mounting flange and a second shock absorber mounting flange; the first shock absorber is mounted on the inertial measurement unit mounting lug through a first shock absorber mounting flange, and the second shock absorber is mounted on the inertial measurement unit mounting lug through a second shock absorber mounting flange.
Furthermore, each group of shock absorber sets also comprises a mounting screw;
the laser inertial unit mounting device is characterized in that a first through hole is formed in the first metal core, a hole formed in the second metal core is a stepped hole, the stepped hole comprises a counter bore and a second through hole, the counter bore is matched with a pin of the first metal core to realize the matching of the first shock absorber and the second shock absorber, and a mounting screw sequentially penetrates through the first through hole and the second through hole and is connected with an inertial unit mounting crossbeam to realize the fixed mounting of the three-self laser inertial unit efficient shock absorption system on the inertial unit mounting crossbeam.
Further, the pin of the first metal core and the hole of the second metal core are in clearance fit.
Furthermore, the first damper mounting flange, the second damper mounting flange, the first metal core and the second metal core are all made of aluminum alloy materials.
Further, the centroids of the first shock absorber mounting flange and the second shock absorber mounting flange in the 4 groups of shock absorber groups are coincident with the centroid of the inertial measurement unit.
Furthermore, the installation position of each group of vibration damper group on the inertial set installation ear is positioned at the waist of the inertial set and is coplanar with the mass center of the inertial set.
Further, the minimum size of the first damping rubber and the second damping rubber is more than or equal to 10 mm.
Further, the size of the combined first damper and the second damper in the axial direction of the damper is larger than or equal to 88 mm.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the distance between the damping rubber in the two dampers in each group of damper group in the three-self laser inertia group efficient damping system is long, the distance between the mounting planes of the two dampers can reach 88mm, and the line-angle coupling phenomenon is effectively weakened;
(2) in the three-self laser inertia unit efficient vibration reduction system, the size of vibration reduction rubber in the minimum size direction can be adjusted according to environmental requirements, the vibration reduction stroke is long, the vibration reduction efficiency is high, the vibration reduction system is fixedly connected with an inertia unit and is not easy to lose, and in a preferred embodiment of the three-self laser inertia unit efficient vibration reduction system, the size of the vibration reduction rubber in the minimum size direction is 10 mm;
(3) according to the three-self laser inertia unit efficient vibration reduction system, the two vibration absorbers in each vibration absorber unit are in clearance fit with each other through the pins and the holes, so that collision and abrasion among the vibration absorbers can be reduced, and the mounting screws can be prevented from being cut off when the vibration absorbers are impacted by radial vibration.
Drawings
FIG. 1 is a schematic diagram of four-point installation of a three-self laser inertial measurement unit efficient damping system according to the present invention;
fig. 2 is a sectional view showing the assembled structure of the first damper and the second damper according to the present invention.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the utility model.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The novel efficient three-self laser inertial measurement unit damping system overcomes the defects that the dynamic characteristics of an inertial measurement unit are poor and the like due to the fact that the size of a T-shaped shock absorber is affected, linear-angular coupling is easy to cause, and the like, and is designed, the damping system is installed at four points on the waist, each installation point corresponds to one group of shock absorber units, the rubber distance between two shock absorbers among each group is long, and the linear-angular coupling phenomenon is effectively weakened; the utility model further solves the technical problems that the T-shaped vibration reduction mode has small vibration reduction stroke and poor capability of absorbing vibration energy and is difficult to resist large-scale impact and vibration.
The utility model discloses a high-efficiency vibration reduction system of a three-self laser inertial measurement unit, which is arranged at the waist of a mass center plane of the three-self laser inertial measurement unit, as shown in figure 1. The utility model relates to a three-self laser inertia unit efficient vibration reduction system, wherein each point is combined by a fisheye-shaped first vibration absorber and a second vibration absorber to work, the first vibration absorber is installed on an inertia unit installation lug 7 through a first vibration absorber installation flange 6, and the second vibration absorber is installed on the inertia unit installation lug 7 through a second vibration absorber installation flange 8; the first damper mounting flange 6 and the first metal core 1 are both made of high-strength aluminum alloy materials, so that the weight of the damping system is effectively reduced.
As shown in fig. 2, the first damper includes a first metal core 1 and a first damper rubber 2, and the second damper includes a second metal core 4 and a second damper rubber 3; the first metal core 1 is arranged in the first vibration damping rubber 2, and the second metal core 4 is arranged in the second vibration damping rubber 3; the first metal core 1 is provided with a pin, the second metal core 4 is provided with a hole, and the pin of the first metal core 1 is in clearance fit with the hole of the second metal core 4, so that the combination of the first damper and the second damper is realized. The pin hole clearance fit can reduce the collision abrasion of the first shock absorber and the second shock absorber, and can also prevent the mounting screw 5 from being cut off when the shock is impacted by radial vibration, and the radial direction of the inertial measurement unit is perpendicular to the mounting screw 5.
Test data show that the damping system effectively counteracts the linear-angular coupling influence. The radial vibration reduction stroke of the vibration absorber can be adapted to the inertial measurement units in different flight environments by adjusting the configuration of the vibration absorber, and the linear-angular coupling influence can be adjusted by adjusting the height of the mounting lugs of the inertial measurement units.
Example 1:
in the embodiment, the vibration reduction system is installed at four points on the waist of a three-self laser inertial measurement unit, the centroid of the whole of a first vibration reducer installation flange 6 and a second vibration reducer installation flange 8 in 4 groups of vibration reducer groups is overlapped with the centroid of the inertial measurement unit during model design, each point is combined by a first vibration reducer and a second vibration reducer to work, a first metal core 1 is provided with a pin, a second metal core 4 is provided with a hole, the pin of the first metal core 1 is in clearance fit with the hole of the second metal core 4, the combination of the first vibration reducer and the second vibration reducer is realized, the collision abrasion among the vibration reducers can be reduced, the installation screw 5 can be prevented from being cut off when the vibration reduction is radially impacted, the first vibration reducer installation flange 6, the second vibration reducer installation flange 8, the first metal core 1 and the second metal core 4 are all made of high-strength aluminum alloy materials 2A12, the weight of the vibration reduction system is effectively reduced, the first vibration reducer and the second vibration reducer are respectively installed on an inertial measurement unit installation lug 7 through the first vibration reducer installation flange 6 and the second vibration reducer 8, the height of the mounting ears in this embodiment is 40 mm.
The diameters of a first through hole formed in the first metal core 1 and a second through hole formed in the second metal core 4 are 10.2mm, and the inertial unit provided with the vibration reduction system is fixed on an inertial unit mounting crossbeam 9 through mounting screws 5.
The experimental data show that the damping system effectively eliminates the linear-angular coupling influence. The radial vibration reduction stroke of the vibration absorber can be adapted to the inertial measurement units in different flight environments by adjusting the configuration of the vibration absorber, and the linear-angular coupling influence can be adjusted by adjusting the height of the mounting lugs of the inertial measurement units.
The utility model has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the utility model is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (9)
1. A three-self laser inertia unit efficient vibration reduction system is characterized by comprising 4 sets of vibration reducer sets arranged on inertia unit mounting lugs (7), wherein each set of vibration reducer set comprises a first vibration reducer and a second vibration reducer;
the first damper comprises a first metal core (1) and a first damping rubber (2); the second damper comprises a second metal core (4) and second damping rubber (3);
the first metal core (1) is arranged in the first vibration damping rubber (2), and the second metal core (4) is arranged in the second vibration damping rubber (3); the first metal core (1) is provided with a pin, the second metal core (4) is provided with a hole, and the pin of the first metal core (1) is matched with the hole of the second metal core (4) to realize the matching of the first damper and the second damper.
2. The high efficiency vibration damping system of a three-self laser inerter set according to claim 1, wherein each set of vibration damper further comprises a first vibration damper mounting flange (6) and a second vibration damper mounting flange (8); the first shock absorber is mounted on the inertial measurement unit mounting lug (7) through a first shock absorber mounting flange (6), and the second shock absorber is mounted on the inertial measurement unit mounting lug (7) through a second shock absorber mounting flange (8).
3. A three self laser inerter high efficiency vibration damping system according to claim 1, wherein each set of dampers further comprises a screw (5);
the laser inertial measurement unit is characterized in that a first through hole is formed in the first metal core (1), a hole formed in the second metal core (4) is a stepped hole, the stepped hole comprises a counter bore and a second through hole, the counter bore is matched with a pin of the first metal core (1), the first shock absorber and the second shock absorber are matched, a mounting screw (5) sequentially penetrates through the first through hole and the second through hole and is connected with an inertial measurement unit mounting crossbeam (9), and the fixed mounting of the laser inertial measurement unit high-efficiency shock absorption system on the inertial measurement unit mounting crossbeam (9) is achieved.
4. A three self laser inerter high efficiency vibration damping system according to claim 1, wherein the pins of the first metal core (1) and the holes of the second metal core (4) are clearance fit.
5. The three-self laser inertial measurement unit efficient vibration damping system according to claim 2, wherein the first vibration damper mounting flange (6), the second vibration damper mounting flange (8), the first metal core (1) and the second metal core (4) are all made of aluminum alloy materials.
6. The three-self laser inerter high efficiency vibration damping system according to claim 2, wherein the centroid of the whole of the first vibration damper mounting flange (6) and the second vibration damper mounting flange (8) in the 4 groups of vibration damper groups coincides with the inerter mass center.
7. The efficient vibration damping system for the triple-self laser inertial set according to claim 1 or 2, characterized in that the mounting position of each vibration damper group on the inertial set mounting ear (7) is located at the waist of the inertial set and is coplanar with the centroid of the inertial set.
8. The efficient damping system of the triple self laser inertial measurement unit according to claim 1, wherein the minimum size of the first damping rubber (2) and the second damping rubber (3) is more than or equal to 10 mm.
9. The high-efficiency vibration damping system of the three-self laser inertial measurement unit according to claim 1, wherein the combined size of the first vibration damper and the second vibration damper in the axial direction of the vibration damper is larger than or equal to 88 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398583.6U CN216246396U (en) | 2021-09-30 | 2021-09-30 | Three-self laser inertial measurement unit efficient vibration reduction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398583.6U CN216246396U (en) | 2021-09-30 | 2021-09-30 | Three-self laser inertial measurement unit efficient vibration reduction system |
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| CN216246396U true CN216246396U (en) | 2022-04-08 |
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| CN202122398583.6U Active CN216246396U (en) | 2021-09-30 | 2021-09-30 | Three-self laser inertial measurement unit efficient vibration reduction system |
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2021
- 2021-09-30 CN CN202122398583.6U patent/CN216246396U/en active Active
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