CN104266811A - Zero-rigidity nonlinear micro-vibration suspension device and micro-vibration testing method thereof - Google Patents
Zero-rigidity nonlinear micro-vibration suspension device and micro-vibration testing method thereof Download PDFInfo
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- CN104266811A CN104266811A CN201410472631.3A CN201410472631A CN104266811A CN 104266811 A CN104266811 A CN 104266811A CN 201410472631 A CN201410472631 A CN 201410472631A CN 104266811 A CN104266811 A CN 104266811A
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Abstract
The invention provides a zero-rigidity nonlinear micro-vibration suspension device and a micro-vibration testing method thereof. The suspension device comprises a membrane and spring set used in a system zero-rigidity area, a protection cylinder used for the outer protecting and inner positioning and installing of the whole device, a positioning tool located on the inner side of the protection cylinder and used for outer guiding and installing positioning of the membrane and spring set, a protection cover plate used for preventing impacting, dust and excessive objects on the top of the whole device, a partition plate located in the middle of the membrane and spring set and used for boundary limiting of the membrane and spring set, the involution connection and rigidity and displacement superposition, a guide pipe located on the inner side of the membrane and spring set and used for guiding and pressure transmitting in the membrane and spring set, a lifting ring and a nut, wherein the lifting ring and nut are located on the guide pipe and used for connecting the guide pipe and a load, and the lifting ring is fastened to the guide pipe through the nut. According to the zero-rigidity nonlinear micro-vibration suspension device and the micro-vibration testing method thereof, the membrane and spring set is used for generating zero rigidity to design the suspension zero-rigidity suspension device, the on-track work weightless state of a suspended object is effectively simulated, and the purpose of simulating the ground micro-vibration test of the suspended object can be effectively achieved.
Description
Technical field
The present invention relates to a kind of device for hoisting and test method thereof, particularly, relate to the non-linear micro-vibration suspension apparatus of a kind of zero stiffness and micro-vibration testing method thereof.
Background technology
It is lower that micro-vibration is suspended object ubiquity system stiffness, to micro-vibration sensing, to features such as translation rotation coupling sensitivities.In the micro-vibration test process in ground, generally get sus-pension but not easily bring the air supporting mode of vibration to carry out the micro-vibration test in ground, but general suspension system is difficult to the state of weightlessness in-orbit that the micro-vibration of accurate simulation is suspended object, be mainly reflected in suspension system rigidity to be difficult to reduce, to aspects such as translation rotation coupling sensitivities, meanwhile, also there is the precision of positive and negative Rigidity Matching and the also larger problem of Project Realization difficulty in the suspension apparatus of positive negative stiffness superposition.
Summary of the invention
For defect of the prior art, the object of this invention is to provide the non-linear micro-vibration suspension apparatus of a kind of zero stiffness and micro-vibration testing method thereof, it uses film spring group to produce the suspension apparatus that zero stiffness designs suspention zero stiffness, the weight being suspended object can carried, while effective simulation is suspended the operation on orbit state of weightlessness of object, do not affect the test findings being suspended object, reach effectively simulation and be suspended the object of the micro-vibration test in object ground.
According to an aspect of the present invention, provide a kind of zero stiffness non-linear micro-vibration suspension apparatus, it is characterized in that, it comprises:
Be responsible for the film spring group of system zero stiffness region;
Be responsible for the outer protection of whole device and the protection cylinder of positioned internal and installation;
Be positioned at protection cylinder inside, be responsible for film spring group lead outward and the positioning tool of location be installed;
Be responsible for the protecting against shock at whole device top, the cover sheet of dust-proof and anti-fifth wheel;
Be positioned at middle, responsible spacing, the involutory connection in film spring group border of film spring group and rigidity, displacement superposed dividing plate;
Be positioned at inside film spring group, be responsible for the guide pipe of film spring group guiding and pressure transmission;
To be positioned on guide pipe, to be responsible for connecting suspension ring and the nut of guide pipe and load, suspension ring by fastening nuts on guide pipe.
Preferably, described suspension ring are connected with guide pipe and will be suspended object weight transmitting to film spring group by the end plate of guide pipe, and guide pipe drives film spring group along guide pipe and loading side thereof to moving.
Preferably, described film spring group adopts the involutory combination or superimposed array configuration implemented by dividing plate.
Preferably, described film spring group adopts non-linear spring, there is the zero stiffness district of 2mm to 4mm scope.
Preferably, described film spring group matches involutory quantity or superimposed quantity in advance according to the quality being suspended object, when loading is suspended object, is moved by ruler monitoring zero stiffness position.
Preferably, one end of described guide pipe is designed to suspension ring suspension centre, and the other end of guide pipe is designed with end plate.
Preferably, described protection cylinder has film spring positioning and guiding groove, and protection cylinder is designed with four oval monitoring windows, whether oval monitoring window monitoring film spring duty is normal.
The present invention also provides micro-vibration testing method of the non-linear micro-vibration suspension apparatus of a kind of zero stiffness, it is characterized in that, described test method adopts the non-linear micro-vibration suspension apparatus of zero stiffness as above, and described test method comprises the following steps:
The first step, according to the array configuration and the quantity that are suspended object composition film spring, and assembles;
Second step, by suspension ring be suspended object and carry out single-point and suspend in midair and be connected, and make suspension ring stressed vertically and by being suspended object barycenter, namely hanging point and barycenter are on same vertical curve;
3rd step, suspension ring are connected with guide pipe and will be suspended object weight transmitting to film spring group by guide pipe;
4th step, guide pipe end plate drives film spring group to enter zero stiffness district along guide pipe, makes to be suspended object and enters the agravic region of zero stiffness;
5th step, by protecting monitoring window and the ruler monitoring suspension apparatus path increment of cylinder, determining device enters film spring zero stiffness workspace, starts test.
Compared with prior art, the present invention has following beneficial effect: one, the present invention adopts single-point to suspend connected mode in midair, hanging point and barycenter are on same vertical curve, the many hanging points of multi beam can be effectively avoided to design the translation rotation coupled problem easily caused, the transfer mode of suspension force is simply efficient, and realizability is strong; Two, the mode that the present invention adopts film spring group and zero stiffness district thereof to realize as suspention zero stiffness, according to being suspended object quality, the stiffness characteristics of design film spring group and array mode, enter zero stiffness district after making suspention, and possess enough fault-tolerant abilitys; Three, the present invention adopts suspension ring to carry out carrying and the connection of suspension apparatus, simple and easy, implement test easily.Four, the boom length (being not less than 2 meters) that the present invention's design is longer, makes the horizontal frequency and the horizontal frequency of the suspension apparatus not easily coupled resonance that are suspended object.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the structural representation of the non-linear micro-vibration suspension apparatus of zero stiffness of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
As shown in Figure 1, the non-linear micro-vibration suspension apparatus of zero stiffness of the present invention comprises:
Be responsible for the film spring group 1 of system zero stiffness region;
Be responsible for the outer protection of whole device and the protection cylinder 2 of positioned internal and installation;
Be positioned at protection cylinder inside, be responsible for film spring group lead outward and the positioning tool 3 of location be installed;
Be responsible for the protecting against shock at whole device top, the cover sheet 4 of dust-proof and anti-fifth wheel;
Be positioned at middle, responsible spacing, the involutory connection in film spring group border of film spring group and rigidity, displacement superposed dividing plate 5;
Be positioned at inside film spring group, be responsible for the guide pipe 6 of film spring group guiding and pressure transmission;
Be positioned on guide pipe, be responsible for connecting suspension ring 7 and the nut 8 of guide pipe and load, suspension ring 7 are anchored on guide pipe 6 by nut 8.
Suspension ring are connected with guide pipe and will be suspended object weight transmitting to film spring group by the end plate of guide pipe, and guide pipe drives film spring group along guide pipe and loading side thereof to moving.So, can change the line bearing mode of film spring group into face bearing mode, the latter is more conducive to the transmission of suspention carrying and stablizes, and guide pipe can play guide effect, also be beneficial to the transmission of suspention carrying, ensure suspended state, the suspention frequency that final guarantee is vertical.
Described film spring group adopts the involutory combination or superimposed array configuration implemented by dividing plate, and specifically, described film spring group can be undertaken involutory by dividing plate, also can be directly superimposed, and quantity can increase and decrease as required.Described film spring group adopts non-linear spring, there is the zero stiffness district of 2mm to 4mm scope.The zero stiffness district of Hookean spring is minimum, and less than 0.5mm, and nonlinear zero stiffness district is comparatively large, can arrive 2 ~ 4mm, during application, certainly need zero stiffness district to be the bigger the better, and is that the enforcement of suspended state is comparatively easy on the one hand, and stable after implementing; Meanwhile, need after suspention to do micro-vibration test, during test, amplitude is just at about 2mm, if zero stiffness district is less than 2mm, this device just fails.
Film spring group can match involutory quantity or superimposed quantity in advance according to the quality being suspended object, when loading is suspended object, is moved by ruler monitoring zero stiffness position.Superimposed and involutoryly can arbitrarily adjust as required, ruler monitoring is convenient, reliable, and cost is low, resource is few, process realizability is high.
Baffle surface is high-strength material (such as stainless steel) and less surfaceness, and such cost is low.
One end of guide pipe is designed to suspension ring suspension centre, and the other end of guide pipe is designed with end plate, possess for film spring spacing constraint, transmit carrying and guiding movement while, also possess film spring and positioning and guiding groove 9 be installed.When film spring assembling and positioning and suspended state are subject to horizontal large impact or vibration, film spring is installed positioning and guiding groove and is ensured that film spring is unlikely to sideslip, and makes failure of apparatus.
Protection cylinder also has film spring to install positioning and guiding groove 9, and protection cylinder is designed with four oval monitoring windows, whether oval monitoring window monitoring film spring duty is normal.
Principal feature of the present invention is as follows: (1), the design configuration of the non-linear micro-vibration suspension apparatus of zero stiffness is simple, has good design flexibility, realizes economy and assembly process process; (2), the suspention frequency of the non-linear micro-vibration suspension apparatus of zero stiffness is 0HZ, can meet the micro-vibration test requirement in ground that the micro-vibration of ultralow frequency is suspended object; , the non-linear micro-vibration suspension apparatus of zero stiffness, possessing while the carrying of enough rigidity is suspended object weight, reducing positive negative stiffness and superposing the larger problem of difficulty, and effectively overcoming the coupled problem etc. be suspended between object and suspender; (4), by test, the suspention frequency demonstrating the non-linear micro-vibration suspension apparatus of zero stiffness is zero frequency, demonstrate the non-linear micro-vibration suspension apparatus of zero stiffness effectively to simulate and be suspended object operation on orbit environment, reach purpose of design, achieve test objective.
In the present invention, the technical indicator of the non-linear micro-vibration suspension apparatus of zero stiffness is as table one: suspention frequency, suspention rigidity, boom length and single-point suspention error etc.Following table one is development and production and completes the key technical indexes of the non-linear micro-vibration suspension apparatus of a kind of zero stiffness of every test:
Table one
| Sequence number | Project | Requirement |
| 1 | Suspention frequency | Close to 0Hz |
| 2 | Suspention rigidity | Close to 0N/m |
| 3 | Boom length | Be not less than 2m |
| 4 | Single-point suspention error | ≤5mm |
Micro-vibration testing method of the non-linear micro-vibration suspension apparatus of zero stiffness of the present invention comprises the following steps:
The first step, according to the array configuration and the quantity that are suspended object composition film spring, and assembles;
Second step, by suspension ring be suspended object and carry out single-point and suspend in midair and be connected, and make suspension ring stressed vertically and by being suspended object barycenter, namely hanging point and barycenter are on same vertical curve;
3rd step, suspension ring are connected with guide pipe and will be suspended object weight transmitting to film spring group by guide pipe;
4th step, guide pipe end plate drives film spring group to enter zero stiffness district along guide pipe, makes to be suspended object and enters the agravic region of zero stiffness;
5th step, by protecting monitoring window and the ruler monitoring suspension apparatus path increment of cylinder, determining device enters film spring zero stiffness workspace, starts test.
In sum, the present invention is suspended object by single-point suspention, by suspension ring and guide pipe end plate transmitted load to the film spring group of suspension apparatus, makes suspension apparatus that certain displacement stroke occur, reach the zero stiffness district of film spring group, make suspension apparatus produce zero stiffness operating characteristic.In suspention process, also by height gauge monitoring suspension apparatus path increment, confirm its zero stiffness perform region.The features such as this device has zero stiffness characteristic, configuration is simple, extensibility is strong, creep resisting ability is excellent, economy and durability, reliability are high, it is convenient, easy to use to assemble, applied range, can apply to various ultralow frequency and be suspended in the ground experiment of object.
The present invention is interval to realize suspension apparatus zero stiffness characteristic by design film spring zero stiffness, takes single-point to cross and is suspended object barycenter hang, realize the micro-vibration test in ground that micro-vibration is suspended simulating operation on orbit state.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. the non-linear micro-vibration suspension apparatus of zero stiffness, it is characterized in that, it comprises:
Be responsible for the film spring group of system zero stiffness region;
Be responsible for the outer protection of whole device and the protection cylinder of positioned internal and installation;
Be positioned at protection cylinder inside, be responsible for film spring group lead outward and the positioning tool of location be installed;
Be responsible for the protecting against shock at whole device top, the cover sheet of dust-proof and anti-fifth wheel;
Be positioned at middle, responsible spacing, the involutory connection in film spring group border of film spring group and rigidity, displacement superposed dividing plate;
Be positioned at inside film spring group, be responsible for the guide pipe of film spring group guiding and pressure transmission;
To be positioned on guide pipe, to be responsible for connecting suspension ring and the nut of guide pipe and load, suspension ring by fastening nuts on guide pipe.
2. the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 1, it is characterized in that, described suspension ring are connected with guide pipe and will be suspended object weight transmitting to film spring group by the end plate of guide pipe, and guide pipe drives film spring group along guide pipe and loading side thereof to moving.
3. the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 1, is characterized in that, described film spring group adopts the involutory combination or superimposed array configuration implemented by dividing plate.
4. the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 3, is characterized in that, described film spring group adopts non-linear spring, there is the zero stiffness district of 2mm to 4mm scope.
5. the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 4, it is characterized in that, described film spring group matches involutory quantity or superimposed quantity in advance according to the quality being suspended object, when loading is suspended object, is moved by ruler monitoring zero stiffness position.
6. the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 4, it is characterized in that, one end of described guide pipe is designed to suspension ring suspension centre, and the other end of guide pipe is designed with end plate.
7. the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 1; it is characterized in that; described protection cylinder has film spring positioning and guiding groove, and protection cylinder is designed with four oval monitoring windows, whether oval monitoring window monitoring film spring duty is normal.
8. a micro-vibration testing method for the non-linear micro-vibration suspension apparatus of zero stiffness, is characterized in that, described test method adopts the non-linear micro-vibration suspension apparatus of zero stiffness according to claim 1, and described test method comprises the following steps:
The first step, according to the array configuration and the quantity that are suspended object composition film spring, and assembles;
Second step, by suspension ring be suspended object and carry out single-point and suspend in midair and be connected, and make suspension ring stressed vertically and by being suspended object barycenter, namely hanging point and barycenter are on same vertical curve;
3rd step, suspension ring are connected with guide pipe and will be suspended object weight transmitting to film spring group by guide pipe;
4th step, guide pipe end plate drives film spring group to enter zero stiffness district along guide pipe, makes to be suspended object and enters the agravic region of zero stiffness;
5th step, by protecting monitoring window and the ruler monitoring suspension apparatus path increment of cylinder, determining device enters film spring zero stiffness workspace, starts test.
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