CN110360259B - Vibration reduction buffer structure applied to sensitive device and missile-borne equipment - Google Patents
Vibration reduction buffer structure applied to sensitive device and missile-borne equipment Download PDFInfo
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- CN110360259B CN110360259B CN201910641785.3A CN201910641785A CN110360259B CN 110360259 B CN110360259 B CN 110360259B CN 201910641785 A CN201910641785 A CN 201910641785A CN 110360259 B CN110360259 B CN 110360259B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
- G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a vibration-damping buffer structure and missile-borne equipment applied to a sensitive device, which are used for protecting from the angles of a core sensitive device level, a component level and a system level, high-impedance filtering energy-absorbing composite materials are selected as materials aiming at high-low frequency bandwidth impact energy, a system structure vibration-damping method combining multi-layer medium vibration isolation and multi-component vibration damping is structurally adopted, the high-low frequency impact energy absorption effect is improved, and the high-low frequency impact energy absorption buffer structure is suitable for protecting the sensitive device, the impact force direction is from the system level to the component level and then to the core sensitive device level, and the impact force is gradually attenuated through the transmission of impact stress waves until the impact resistance requirement of a core inertial device is met. The local epoxy composite material is adopted for integral encapsulation and reinforcement, the integral rigidity and strength of key core devices are improved, flexible connection is used for connection of the core sensitive devices, the displacement buffering fault tolerance of the core sensitive devices is guaranteed, and the phenomenon that the local devices are pulled and even fall off and lose efficacy due to too strong connection rigidity is avoided.
Description
Technical Field
The invention belongs to the field of inertial navigation systems, and particularly relates to a vibration reduction buffer structure and missile-borne equipment applied to a sensitive device.
Background
In order to meet the development requirements of high precision, miniaturization and low cost of guided ammunition, an integrated control unit integrating guidance and control is vigorously developed in various countries at present, most of inertial devices such as an accelerometer and a gyroscope in an Inertial Measurement Unit (IMU) are mechanical, and the inertial devices adopt a cavity or cantilever structure form, are easily influenced by impact load, so that the performance of the devices is reduced and even the devices are out of order, and the integrated control unit is the most volatile effective part of a product. The traditional impact resisting method is to apply a shock absorber, and the method has a good attenuation effect on middle and low frequency impact energy, but cannot effectively attenuate high frequency impact stress waves. According to data analysis, the impact sensitive area of the inertia measurement unit is about 10kHz high frequency, high frequency impact stress waves and impact energy need to be effectively attenuated, and otherwise, secondary damage of the impact stress waves can be caused. Meanwhile, the traditional impact-resistant strategy is only developed aiming at an inertia measurement unit of a core device, and vibration reduction and buffering are not considered from the perspective of a system, a local part and a device, so that the impact-resistant effect is poor. The high overload impact protection technology is still a technical bottleneck for restricting guided ammunition.
Disclosure of Invention
The invention provides a vibration damping and buffering structure applied to a sensitive device and missile-borne equipment, aiming at solving the technical problems.
In order to solve the technical problems, the invention solves the problems by the following technical scheme:
a vibration damping and buffering structure applied to a sensitive device comprises an inertia measurement unit shell and an equipment shell, wherein the sensitive device is arranged in the inertia measurement unit shell, the inertia measurement unit shell is arranged in the equipment shell, and the vibration damping and buffering structure comprises:
the sensitive device is connected with the shell of the inertial measurement unit through a flexible material, an epoxy composite material is encapsulated in the shell of the inertial measurement unit, and the epoxy composite material is used for fixedly encapsulating the sensitive device in the shell of the inertial measurement unit;
a buffering vibration reduction structure is arranged between the inertia measurement unit shell and the equipment shell, and the buffering vibration reduction structure is a polyurethane composite material encapsulated between the inertia measurement unit shell and the equipment shell or a damping pad arranged between the inertia measurement unit shell and the equipment shell;
and a damping pad is also arranged on the outer side of the equipment shell.
Further, the density of the epoxy composite material is 0.8-1.0g/cm3。
Further, the density of the polyurethane composite material is 0.12-0.3g/cm3。
Further, the flexible material is MC nylon screw and MC nylon stud.
Further, the damping pad between inertia measurement unit casing and the equipment casing includes MC nylon cushion and honeycomb foamed aluminium, and along the direction of impact, sets up earlier MC nylon cushion, sets up again honeycomb foamed aluminium.
Further, when the shock wave spectrum type is a shock spectrum with a long bandwidth, the occupation inertia of the MC nylon cushion is increasedMeasuring the ratio of damping pad between unit casing and equipment casing, or selecting damping pad with density of 0.12-0.21g/cm3The polyurethane composite of (a); when the shock wave spectrum type is a shock spectrum with narrow bandwidth, the proportion of the honeycomb foamed aluminum in the damping cushion between the shell of the inertia measurement unit and the shell of the equipment is increased, or the density is selected to be 0.22-0.3g/cm3The polyurethane composite of (1).
Further, the damping pad outside the equipment shell comprises an MC nylon pad and a metal wire vibration damping pad, and the metal wire vibration damping pad is arranged in the direction of impact, and then the MC nylon pad is arranged.
Further, when the shock wave spectrum type is a shock spectrum with a long bandwidth, the proportion of the MC nylon cushion to the damping cushion on the outer side of the equipment shell is increased, or the density is 0.12-0.21g/cm3The polyurethane composite of (a); when the shock wave spectrum type is a narrow-bandwidth shock spectrum, the ratio of the metal wire vibration-damping pad to the damping pad on the outer side of the equipment shell is increased, or the density is 0.22-0.3g/cm3The polyurethane composite of (1).
The missile-borne equipment comprises a missile cabin, an inertia measurement unit arranged in the missile cabin and a plurality of sensitive devices arranged in a shell of the inertia measurement unit, wherein the vibration reduction buffer structure of the missile-borne equipment is applied to the vibration reduction buffer structure.
Further, the sensing device comprises a gyroscope, an accelerometer and a printed board assembly.
Compared with the prior art, the invention has at least the following beneficial effects: the invention relates to a vibration reduction buffer structure applied to a sensitive device, wherein the sensitive device is connected with an inertia measurement unit shell through a flexible material, an epoxy composite material is encapsulated in the inertia measurement unit shell, and the sensitive device is fixedly sealed through the epoxy composite material; polyurethane composite material is encapsulated between the shell of the inertia measurement unit and the shell of the equipment, or a damping pad is arranged between the shell of the inertia measurement unit and the shell of the equipment; damping cushions are arranged between the equipment shell and other equipment in contact with the equipment shell. The invention protects from the angles of a core sensitive device level, a component level and a system level, and selects high-impedance filtering on materials aiming at high-low frequency bandwidth impact energyThe energy-absorbing composite material structurally adopts a system structure vibration damping method combining multilayer medium vibration isolation and multi-component vibration damping, improves the high-low frequency impact energy absorption effect, is suitable for protecting sensitive devices, and is suitable for gradually attenuating impact force from a system level to a component level and then to a core sensitive device level through the transmission of impact stress waves until the impact resistance requirement of a core inertial device is met. The local epoxy composite material is adopted for integral encapsulation and reinforcement, the integral rigidity and strength of key core devices are improved, flexible connection is used for connection of the core sensitive devices, the displacement buffering fault-tolerant capacity of the core sensitive devices is guaranteed, the phenomenon that the local devices are pulled or even fall off and lose efficacy due to too strong connection rigidity is avoided, and the low-frequency section stress state of the internal core devices is improved. In the process of transmitting the impact stress wave, the stress wave in the damping layer is refracted through the reflection of the stress wave between the level interfaces, and the damping medium absorbs, converts and dissipates the impact energy, so that the aim of attenuating the impact energy is fulfilled. The MC nylon cushion has good wave resistance and impact energy absorption rate, is low in cost and easy to process, and can be used as an ideal nonmetal vibration reduction buffer material; the honeycomb foamed aluminum has low quality and high impact energy attenuation coefficient, and is a good metal vibration reduction buffer material; the density of the polyurethane composite material in the potting material is 0.12-0.3g/cm3The epoxy composite material has the characteristics of small density, good energy absorption and buffering effects, high filling property in encapsulation, light weight, porosity and high energy absorption rate, and the density of the epoxy composite material is 0.8-1.0g/cm3The high-density and high-strength composite material is high in density, high in strength, corrosion-resistant and ageing-resistant, and has strong reinforcing and supporting capacity for local devices. The invention adopts the combination of the high damping MC nylon mat and the porous metal vibration isolation device (honeycomb foamed aluminum), has low material cost, is easy to process and install, is particularly suitable for the low-cost requirement of ammunition products, and has strong popularization; the high-overload-resistant multi-element vibration attenuation buffer structure can be flexibly changed according to the actual size and the installation mode of the designed structural space, the impact resistance effect is convenient to evaluate and predict, the high-overload-resistant multi-element vibration attenuation buffer structure can be widely applied to impact protection of various system-level products, and the method has strong applicability.
Further, when the shock wave spectrum type is a shock spectrum with a long bandwidth, the MC nylon cushion is increased to occupy the shell of the inertia measurement unitThe proportion of damping pad between the damping pad and the casing of the equipment or the density of the damping pad is 0.12-0.21g/cm3The polyurethane composite material is beneficial to improving the overall energy absorption efficiency of the system; when the shock wave spectrum type is a shock spectrum with narrow bandwidth, the proportion of the honeycomb foamed aluminum in the damping cushion between the shell of the inertia measurement unit and the shell of the equipment is increased, or the density is selected to be 0.22-0.3g/cm3The polyurethane composite material is beneficial to improving the stress wave attenuation effect.
Further, when the shock wave spectrum type is a shock spectrum with a long bandwidth, the proportion of the MC nylon cushion to the damping cushion on the outer side of the equipment shell is increased, or the density is 0.12-0.21g/cm3The polyurethane composite material is beneficial to improving the overall energy absorption efficiency of the system; when the shock wave spectrum type is a narrow-bandwidth shock spectrum, the ratio of the metal wire vibration-damping pad to the damping pad on the outer side of the equipment shell is increased, or the density is 0.22-0.3g/cm3The polyurethane composite material is beneficial to improving the stress wave attenuation effect.
The missile-borne equipment disclosed by the invention protects an inertia measurement sensitive device, and the internal device is encapsulated by adopting the epoxy composite encapsulating material to form a solidified whole, so that the integral strength and rigidity are improved, and the circuit element, the printed board and the like are prevented from generating relative dislocation under the action of large impact. The method is characterized in that a high-wave-resistance polyurethane composite potting material is adopted to attenuate incident stress waves, absorb energy and reduce the peak value of the stress waves, meanwhile, the wave reflection interface effect of a heterogeneous medium is considered, vibration isolation is carried out by adopting different material media, namely, a combination mode of an MC nylon vibration damping pad and honeycomb foamed aluminum is adopted, and the adding and releasing sequence is determined according to the impact direction, so that the incident impact waves are subjected to energy dissipation and attenuation by the honeycomb foamed aluminum firstly and then further subjected to energy dissipation and attenuation by the MC nylon vibration damping pad. Damping vibration attenuation pads are additionally arranged between the bomb bay sections from top to bottom, a buffer gap is reserved, the damping simple harmonic oscillator system is formed by the upper and lower vibration attenuation pads and the inertia measurement unit bay sections together, the release time of impact energy is prolonged through impact deformation of vibration attenuation materials, and the peak value of incident impact load is reduced. In conclusion, the high overload resistant vibration attenuation buffer structure can achieve good vibration attenuation and buffering effects.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the principle of the multi-element vibration damping and buffering structure of the present invention;
FIG. 2 is a schematic view of the energy absorption and buffering principle of the damping pad material according to the present invention;
fig. 3 is a schematic view of impact protection of the integrated control unit of the missile-borne equipment.
In the figure: 1. a first MC nylon mat; 2. a magazine; 3. MC nylon screws; 4. a printed board assembly; 5. a second MC nylon mat; 6. a first honeycomb aluminum foam; 7. a first wire cushion; 8. a second wire cushion; 9. a housing; 10. a second honeycomb aluminum foam; 11. a third MC nylon mat; 12. MC nylon screw bolt; 13. a fourth MC nylon mat; 14. a polyurethane composite; 15. a first epoxy composite; 16. a second epoxy composite.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As a preferred embodiment of the present invention, the damping buffer structure applied to the sensitive device is applied to protect the sensitive device in the inertial measurement unit, and the sensitive device includes a gyroscope, an accelerometer, a printed board assembly, and the like. The sensitive device is arranged in an inertia measurement unit shell, and the inertia measurement unit shell is arranged in an equipment shell for mounting the inertia measurement unit.
The damping buffer structure adopts three-level protection, namely protection is carried out from a device level, a component level and a system level, and the damping buffer structure specifically comprises the following steps:
device-level protection: the sensitive device is connected with the shell of the inertia measurement unit by adopting a flexible material, and after the connection, the interior of the shell of the inertia measurement unit is encapsulated by adopting an epoxy composite material; specifically, the flexible material of the invention is MC nylon screw and MC nylon stud, and the density of the epoxy composite material is 0.12-0.3g/cm3；
And (3) component level protection: the inertia measurement unit shell and the equipment shell are encapsulated by adopting a polyurethane composite material, or a damping pad is adopted for damping vibration; the density of the polyurethane composite material is 0.12-0.3g/cm3(ii) a Specifically, the damping pad comprises an MC nylon pad and honeycomb foamed aluminum, the MC nylon pad is arranged firstly and the honeycomb foamed aluminum is arranged secondly along the direction of the impact force, the mounting mode and the thickness adjustment of the damping pad are carried out aiming at different impact spectrum types, when the impact spectrum type is the impact spectrum with a long bandwidth, the total impact energy is larger, the buffer energy absorption is mainly used, and therefore the occupation of the MC nylon pad on the damping pad between the inertia measurement unit shell and the equipment shell is increasedThe ratio, or the selected density, is 0.12-0.21g/cm3The polyurethane composite material is beneficial to improving the overall energy absorption efficiency of the system; when the shock wave spectrum type is a narrow-bandwidth shock spectrum, the shock spectrum type has large shock magnitude, the total shock energy is moderate, the secondary damage proportion of high-frequency shock stress waves is large, the reinforcement vibration isolation of an internal core sensitive device is enhanced, the dissipation effects of stress wave reflection, refraction and the like are considered, the multilayer medium vibration isolation effect can be enhanced, namely, the vibration isolation material with three or even more layers is added, meanwhile, the vibration isolation material is added from small to large according to the medium wave impedance according to the stress wave, the stress wave attenuation effect is improved, the proportion of honeycomb foam aluminum in a damping pad between an inertia measurement unit shell and an equipment shell is increased, or the density is 0.22-0.3g/cm3The polyurethane composite of (a);
and (4) system level protection: adopt the damping pad to carry out the damping between equipment casing and rather than other equipment of contact, it is specific, the damping pad includes MC nylon pad and wire damping pad, and along the direction of impact force, set up the wire damping pad earlier, set up MC nylon pad again, install additional mode and damping pad thickness adjustment to different impact spectrum types, and in the same way, when the impact spectrum type is the impact spectrum of long bandwidth, increase the occupation ratio that MC nylon pad accounted for the damping pad in the equipment casing outside, or select for use density for use and be 0.12-0.21g/cm3The polyurethane composite of (a); when the shock wave spectrum type is a narrow-bandwidth shock spectrum, the ratio of the metal wire vibration-damping pad to the damping pad on the outer side of the equipment shell is increased, or the density is 0.22-0.3g/cm3The polyurethane composite of (1).
Fig. 1 is a schematic diagram of a vibration damping and buffering structure applied to a sensitive device according to the present invention, in which a triple protection structure of a multi-element vibration damping and buffering structure from a device level to a component level and then to a system level is shown, an epoxy composite is encapsulated in a housing in which the sensitive device is located, and a placement layout of multi-layer medium vibration isolation is shown, the placement layout of the multi-layer medium vibration isolation is a component level protection implemented by a buffering medium 1 and a buffering medium 2 in the drawing, and the component level protection and the system level protection implemented by a buffering medium 3 and a buffering medium 4 are also implemented by encapsulating a polyurethane composite. Therefore, the impact stress wave is transmitted and attenuated step by step through the direction of the impact force, the stress wave is attenuated in the level II through the system level protection, the stress wave is attenuated in the level I through the component level protection, and finally the stress wave is attenuated to meet the impact tolerance requirement of a core inertial device (namely a sensitive device).
As shown in fig. 2, the principle of buffering and vibration absorption of each layer of damping vibration-absorbing material is illustrated, under impact force, an impact device shell (i.e., a rigid layer) generates impact stress waves, and the impact stress waves are reflected by stress waves between interfaces of a system level, a component level and a device level in a transmission process, that is, the device shell and an inertia measurement unit shell reflect the impact stress waves; and the damping buffer medium absorbs, converts and dissipates the impact energy to achieve the purpose of attenuating the impact energy, and when the attenuated impact stress wave finally reaches the epoxy composite material sealing layer in the shell of the inertia measurement unit, the sealing layer further protects a sensitive device. The MC nylon cushion has good wave impedance and impact energy absorption rate, low cost and easy processing, can be used as an ideal nonmetal vibration reduction buffer material, and the honeycomb foamed aluminum has low quality and high impact energy attenuation coefficient. The polyurethane composite foaming material in the potting material has the characteristics of light weight, multiple pores and high energy absorption rate, is used as an optimal material for external cavity potting, and the epoxy composite material is high in density, high in strength and strong in reinforcing and supporting capacity for local devices.
Fig. 3 shows a specific engineering application of impact protection of the integrated control unit of the missile-borne equipment, namely, the vibration-damping buffer structure of the invention is applied to protection and vibration damping, an integrated control unit assembly is formed by assembling a shell 9, an MC nylon screw 3, a printed board assembly 4 and an MC nylon stud 12, wherein the printed board assembly 4 and the shell 9 comprise an inertia measurement unit and an impact sensitive device. The integrated control unit is assembled into a cartridge magazine 2, the cartridge magazine 2 is an equipment shell, the whole cartridge magazine bears explosive impact force from the bottom to the top, and in order to ensure that a core inertia measurement unit and an impact sensitive device can normally work under impact, the vibration reduction buffer structure is adopted for protection, and the specific implementation is as follows:
(1) device-level protection: the printed board assembly 4 and the shell 9 comprise a core inertia measurement unit and sensitive devices, the sensitive devices comprise a gyroscope, an accelerometer, an electronic component and the like, the connection mode of the sensitive devices is as shown in figure 3, the sensitive devices are formed by overlapping frames through MC nylon screws 3 and MC nylon studs 12, certain elastic buffer deformation allowance is provided, the interior of the sensitive devices is encapsulated by a first epoxy composite material 15 and a second epoxy composite material 16 respectively, and the integral rigidity is enhanced.
(2) And (3) component level protection: for the integrated control unit, a two-layer medium vibration isolation buffering mode combining a second MC nylon cushion 5, a third MC nylon cushion 11, a first cellular foamed aluminum 6 and a second cellular foamed aluminum 10 is adopted, specifically, as shown in fig. 3, the two-way attenuation effect of stress waves in propagation is guaranteed by vertically and symmetrically placing, according to the impact direction, the wave resistance and the system attenuation effect evaluation, the bottom end is the first cellular foamed aluminum 6, the second MC nylon cushion 5 is arranged on the first cellular foamed aluminum 6, and the maximum attenuation coefficient is guaranteed.
As shown in fig. 3, the bomb chamber on the upper part of the outer wall of the shell 9 is encapsulated by polyurethane composite material 14, which serves the purpose of upper part reinforcement and energy absorption buffering for the integrated control unit.
(3) And (4) system level protection: add between adjacent capsule 2 and put first MC nylon mat 1, fourth MC nylon mat 13, first wire shock pad 7 and first wire shock pad 8, specifically, as shown in fig. 3, first MC nylon mat 1 and first wire shock pad 8 constitute and go up damping device, damping device under fourth MC nylon mat 13 and first wire shock pad 7 constitution, two sets of damping device's setting for 2 cabin sections in adjacent capsule constitute the simple harmonic oscillator system from top to bottom, guarantee the buffering of whole cabin section under the impact, adjust assembly pretightning force and wire shock pad compression volume during the installation additional, in order to ensure that damping system can be in effective elasticity working range.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a be applied to damping buffer structure of sensitive device which characterized in that: including inertial measurement unit casing and equipment casing, sensitive device sets up in the inertial measurement unit casing, the inertial measurement unit casing sets up in the equipment casing, wherein:
the sensitive device is connected with the shell of the inertia measurement unit through a flexible material, and the shell of the inertia measurement unit is internally encapsulated with a material with the density of 0.8-1.0g/cm3The epoxy composite material is used for fixedly sealing a sensitive device in the shell of the inertial measurement unit;
a buffer vibration damping structure is arranged between the inertia measurement unit shell and the equipment shell, and the buffer vibration damping structure is encapsulated between the inertia measurement unit shell and the equipment shell and has the density of 0.12-0.3g/cm3The polyurethane composite material or the damping cushion arranged between the inertia measurement unit shell and the equipment shell;
a damping pad is further arranged on the outer side of the equipment shell; the damping pad on the outer side of the equipment shell comprises an MC nylon pad and a metal wire damping pad, and the metal wire damping pad is arranged firstly and then the MC nylon pad is arranged along the impact direction; when the shock wave spectrum type is a shock spectrum with a long bandwidth, the proportion of the MC nylon cushion to the damping cushion on the outer side of the equipment shell is increased, or the damping cushion on the outer side of the equipment shell is replaced by the damping cushion with the density of 0.12-0.21g/cm3The polyurethane composite of (a); when the shock wave spectrum type is the shock spectrum with narrow bandwidth, the proportion of the metal wire shock pad in the damping pad outside the equipment shell is increased, or the damping pad outside the equipment shell is replaced by the damping pad with the density of 0.22-0.3g/cm3The polyurethane composite of (1).
2. The vibration damping and buffering structure applied to the sensitive device according to claim 1, wherein: the flexible material is MC nylon screw and MC nylon double-screw bolt.
3. The vibration damping and buffering structure applied to the sensitive device according to claim 2, wherein: damping pad between inertia measurement unit casing and the equipment casing includes MC nylon pad and honeycomb foamed aluminium, and along the direction of impact, sets up earlier MC nylon pad sets up again honeycomb foamed aluminium.
4. A vibration damping and buffering structure applied to a sensitive device according to claim 3, wherein: when the shock wave spectrum type is a shock spectrum with a long bandwidth, the proportion of the MC nylon cushion in the damping cushion between the shell of the inertia measurement unit and the shell of the equipment is increased, or the damping cushion between the shell of the inertia measurement unit and the shell of the equipment is replaced by the damping cushion with the density of 0.12-0.21g/cm3The polyurethane composite of (a); when the shock wave spectrum type is a shock spectrum with narrow bandwidth, the occupation ratio of the honeycomb foamed aluminum to the damping cushion between the shell of the inertia measurement unit and the shell of the equipment is increased, or the damping cushion between the shell of the inertia measurement unit and the shell of the equipment is replaced by the damping cushion with the density of 0.22-0.3g/cm3The polyurethane composite of (1).
5. An apparatus for missile-borne applications, comprising: the vibration-damping buffer structure of the missile-borne equipment comprises a missile cabin, an inertia measurement unit arranged in the missile cabin and a plurality of sensitive devices arranged in a shell of the inertia measurement unit, wherein the vibration-damping buffer structure of the missile-borne equipment is applied as the vibration-damping buffer structure of any one of claims 1-4.
6. The missile-borne device of claim 5, wherein: the sensing device comprises a gyroscope, an accelerometer and a printed board assembly.
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| CN111237370B (en) * | 2020-02-03 | 2021-06-15 | 中北大学 | High-g-value impact acceleration buffering device and buffering method and application |
| CN111397601B (en) * | 2020-04-10 | 2022-02-18 | 中国兵器工业集团第二一四研究所苏州研发中心 | Little inertia measurement unit shock-resistant damping structure and damping system |
| CN113029122A (en) * | 2021-03-12 | 2021-06-25 | 湖南亿诺胜精密仪器有限公司 | Jitter dissipation and vibration elimination device for mechanically-dithered laser gyroscope |
| CN112964253B (en) * | 2021-05-18 | 2021-07-16 | 北京三快在线科技有限公司 | Vibration reduction mechanism of inertia measurement assembly, flight control inertia measurement assembly and aircraft |
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