CN114251410A - Semi-active vibration reduction platform structure of inertia actuating mechanism based on magneto-rheological damper - Google Patents
Semi-active vibration reduction platform structure of inertia actuating mechanism based on magneto-rheological damper Download PDFInfo
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- CN114251410A CN114251410A CN202111368635.3A CN202111368635A CN114251410A CN 114251410 A CN114251410 A CN 114251410A CN 202111368635 A CN202111368635 A CN 202111368635A CN 114251410 A CN114251410 A CN 114251410A
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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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/26—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/30—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids
- F16F13/305—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids magnetorheological
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
- F16F15/035—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means by use of eddy or induced-current damping
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to an inertia actuating mechanism semi-active vibration attenuation platform based on a magneto-rheological damper, which comprises an adapter plate, a connecting plate, three springs, three semi-active magneto-rheological dampers, a plurality of acceleration sensors, a control system and a direct-current power supply, wherein the adapter plate is connected with the connecting plate through the connecting plate; the adapter plate is connected with the inertia actuating mechanism, the connecting plate is connected with the satellite, the adapter plate and the connecting plate are arranged oppositely and are connected through a spring and a semi-active magnetorheological damper; each acceleration sensor is fixedly arranged on each semi-active magnetorheological damper and used for acquiring motion information of the vibration reduction platform; the control system is in circuit connection with each semi-active magnetorheological damper, each acceleration sensor and the direct-current power supply and is used for controlling the current input quantity of each semi-active magnetorheological damper. The semi-active vibration reduction platform can obviously reduce the influence of the vibration of the inertia actuating mechanism on the effective sensitive load performance of each satellite, and improves the performance of the whole satellite.
Description
Technical Field
The invention relates to the technical field of vibration reduction platforms, in particular to a semi-active vibration reduction platform structure of an inertia actuating mechanism based on a magneto-rheological damper.
Background
When the inertia actuator runs at high speed, random excitation generated inside or outside interacts with structural modes of the inertia actuator, high-frequency vibration is generated, and the performance of an external mechanism connected with the inertia actuator (mainly referring to a satellite connected with the inertia actuator) is affected.
In recent years, with the gradual improvement of the precision requirement of a satellite and the increasingly severe requirement of a sensitive measuring mechanism and an ultra-precise sensor mounted on the satellite on the vibration of a working environment, the external micro-vibration disturbance state of an inertial execution mechanism during working directly influences the precision of a payload, and further influences the precision of the whole satellite, so that the effective control on the micro-vibration characteristic of an inertial execution mechanism product is imperative.
In related products, a passive vibration reduction and isolation platform has the defect of poor effective effect in the aspect of medium and low frequency control, and an active vibration reduction and isolation platform has the defects of relatively low reliability and large weight.
Disclosure of Invention
In order to solve the problems and achieve the purpose of reliable vibration reduction, the invention provides a semi-active vibration reduction platform based on a semi-active magnetorheological damper, which comprises an adapter plate, a connecting plate, at least three springs, at least three semi-active magnetorheological dampers, a plurality of acceleration sensors, a control system and a direct current power supply, wherein the adapter plate is connected with the connecting plate through a connecting plate;
the adapter plate is connected with the inertia actuating mechanism, the connecting plate is connected with the satellite, the adapter plate and the connecting plate are arranged oppositely, and the adapter plate is connected with the connecting plate through the spring and the semi-active magneto-rheological damper; an acceleration sensor is arranged at one end of each semi-active magnetorheological damper connected with the adapter plate, and the deceleration sensors are used for acquiring motion information of the vibration reduction platform; the direct current power supply and the control system are fixedly arranged on the satellite; each semi-active magnetorheological damper, each acceleration sensor and the direct current power supply are all connected with the control system through circuits, and the control system is used for controlling the current input quantity of each semi-active magnetorheological damper.
Preferably, the first end of each spring is fixedly connected with the center of the adapter plate, the second end of each spring inclines outwards by an angle and is fixedly connected with the edge of the connecting plate, and the plurality of springs are uniformly distributed around the center shaft of the adapter plate and the center shaft of the connecting plate.
Preferably, the first end of each semi-active magnetorheological damper is rotatably connected with the edge of the adapter plate, the second end of each semi-active magnetorheological damper inclines inwards by an angle and is rotatably connected with the center of the connecting plate, and the semi-active magnetorheological dampers are uniformly distributed around the center shaft of the connecting plate and the center shaft of the connecting plate.
Preferably, the central position of the adapter plate is provided with bosses which are uniformly distributed around the central shaft of the adapter plate and equal to the number of the springs, each boss is connected with the first end of the corresponding spring, and the table top of each boss connected with the spring is an inclined plane.
Preferably, the edge of the connecting plate is provided with adapter plates which are uniformly distributed around the central shaft of the connecting plate and equal to the number of the springs, each adapter plate is provided with a spring adapter plate, each spring adapter plate is connected with the second end of the corresponding spring, and the surface of each spring adapter plate connected with the spring is an inclined surface and is consistent with the inclined angle of the table top of the boss.
Preferably, the adapter block and the spring adapter plate are both made of aluminum alloy materials.
Preferably, the plurality of semi-active magnetorheological dampers and the plurality of springs are arranged at intervals one by one.
Preferably, the number of the springs and the number of the semi-active magnetorheological dampers are 3.
Preferably, the spring is cut from a carbon fiber reinforced aluminum composite tube.
Preferably, the control system calculates real-time currents required by the semi-active magneto-rheological dampers according to real-time motion information acquired by the acceleration sensors, and the control system provides the currents provided by the direct-current power supply to the semi-active magneto-rheological dampers respectively according to the calculated real-time currents, so that the semi-active magneto-rheological dampers generate corresponding damping forces and dissipate energy generated by vibration of the inertia actuating mechanism.
The invention has the following beneficial effects:
the spring and the semi-active magnetorheological damper respectively adopt an arrangement mode of gathering from the outer edge to the middle and symmetrically, obliquely and uniformly distributing from the middle to the outside, and the arrangement mode can effectively inhibit the vibration generated by the inertia actuating mechanism in each direction;
the energy dissipation element is a semi-active magneto-rheological damper, and the magnitude of the magnetic field intensity in the internal structure can be changed by adjusting the externally applied current, so that the rheological property of a fluid medium in the damper is rapidly changed, the effect of changing the damping force in real time according to the requirement can be realized, and the vibration control precision is improved;
the semi-active magnetorheological damper is connected to the adapter plate and the connecting plate only through the hinge shaft, so that the connection mode is simpler, redundant additional elements are not needed, the mass of the vibration reduction platform is smaller, and the reliability is improved;
the semi-active magneto-rheological damper not only can convert a high-frequency vibration signal generated by the inertia actuating mechanism into a low-frequency vibration signal, but also can dissipate energy generated by vibration through the semi-active magneto-rheological damper, so that the influence of the vibration of the inertia actuating mechanism on the effective sensitive load performance of each satellite can be remarkably reduced, and the whole satellite performance is improved.
Drawings
FIG. 1 is an isometric view of a semi-active vibration reduction platform of an inertial actuating mechanism based on a magnetorheological damper;
fig. 2 is a schematic diagram of the connection between the semi-active damping platform and the inertial actuator according to the present invention.
Detailed Description
The semi-active vibration reduction platform of the inertia actuating mechanism based on the magneto-rheological damper is further described in detail with reference to the attached drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
As shown in fig. 1 and fig. 2, for the semi-active vibration damping platform of the inertia actuator based on the magnetorheological damper provided by the present invention, the semi-active vibration damping platform of the present embodiment includes an adapter plate 1, a connecting plate 6, three springs 3, three semi-active magnetorheological dampers 2, three acceleration sensors 4, a control system 7, and a dc power supply.
Of course, in other preferred embodiments of the present invention, more than three springs, more than three semi-active magnetorheological dampers 2 and more than three acceleration sensors 4 may be provided, and it is only necessary to ensure that the 3 devices are provided in the same number.
The adapter plate 1 is connected with the inertia actuating mechanism 9, the connecting plate 6 is connected with a satellite (not shown), the adapter plate 1 and the connecting plate 6 are both circular plates and are arranged coaxially relative to each other, and the adapter plate 1 and the connecting plate 6 are connected through the spring 3 and the semi-active magnetorheological damper 2. And each acceleration sensor 4 is fixedly arranged on each semi-active magneto-rheological damper 2 and is used for acquiring the motion information of the vibration reduction platform. The direct-current power supply and control system 7 is fixedly arranged on a satellite; the control system 7 is connected with each semi-active magneto-rheological damper 2, each acceleration sensor 4 and the direct current power supply through circuits, the control system 7 calculates real-time current required by each semi-active magneto-rheological damper 2 according to real-time motion information collected by each acceleration sensor 4, and provides the current provided by the direct current power supply to each semi-active magneto-rheological damper 2 according to the calculated real-time current, so that each semi-active magneto-rheological damper 2 generates corresponding damping force, energy generated by the inertia execution mechanism 9 due to vibration is dissipated, and the influence of the vibration on a satellite is reduced.
Specifically, three bosses 11 are arranged at the circle center of the adapter plate 1, the bosses 11 are uniformly distributed around the central shaft of the adapter plate 1, each boss 11 is connected with the first end of the corresponding spring 3, the table top of each boss 11 connected with the corresponding spring 3 is an inclined plane, and each spring 3 is vertically connected with the table top of the corresponding boss 11. Correspondingly, be located the border position of connecting plate 6 is provided with three switching piece 8, and each switching piece 8 centers on the center pin evenly distributed of connecting plate 6, and all is provided with spring keysets 5 on every switching piece 8, and every spring keysets 5 is connected with the second end that corresponds spring 3, and the face that every spring keysets 5 is connected with spring 3 is the inclined plane and unanimous with the inclination of 11 mesas of boss, and further, every spring 3 is connected with corresponding spring keysets 5 perpendicularly. Thus, the springs 3 are arranged at an oblique angle between the connection plate 6 and the adapter plate 1 and are evenly distributed around the central axes of the connection plate and the adapter plate, and it can be seen from the figure that the springs 3 are arranged obliquely outwards from the adapter plate 1 to the connection plate 6. Further, three adapter blocks 8 and three spring keysets 5 are made by aluminum alloy material, and the top surface of three adapter blocks 8 is the inclined plane, and the normal direction of the top surface of every adapter block 8 all points to the centre of a circle of adapter plate 1, sets up spring keysets 5 on the top surface of each adapter block 8, therefore the inclination of spring keysets 5 is unanimous with the inclination of adapter block 8 top surface. Correspondingly, the normal direction of the table top of each boss 11 is directed to the corresponding spring adapter plate 5, i.e. the inclination angles of the table top of the boss 11 and the spring adapter plate 5 are consistent.
The three springs 3 are all formed by cutting carbon fiber reinforced aluminum composite pipes, each spring 3 weakly attenuates the vibration generated by the adapter plate 1, and converts a high-frequency vibration signal into a low-frequency vibration signal, so that the influence of the vibration of the inertia actuating mechanism 9 on a satellite is reduced.
Furthermore, each semi-active magnetorheological damper 2 connected between the adapter plate 6 and the connecting plate 1 is provided with a piston rod in a penetrating manner along the central axis thereof, one end of the piston rod of each semi-active magnetorheological damper 2 is hinged to the edge of the adapter plate 6 through a first hinge shaft, three first hinge shafts are uniformly distributed around the central axis of the connecting plate 6, the other end of the piston rod is hinged to the circle center of the connecting plate 1 through a second hinge shaft, and three second hinge shafts are uniformly distributed around the central axis of the adapter plate 1, so that each semi-active magnetorheological damper 2 is arranged at an inclined angle between the connecting plate 6 and the adapter plate 1 and uniformly distributed around the central axes of the adapter plate and the adapter plate, and the semi-active magnetorheological damper 2 is arranged at an inward inclined angle from the adapter plate 1 to the connecting plate 6. It is further noted that the semi-active magnetorheological dampers 2 and the springs 3 are inclined at the same angle but in opposite directions. And the semi-active type magneto-rheological dampers 2 and the springs 3 are arranged at intervals and are approximately symmetrically distributed in space. The arrangement mode of the spring 3 and the semi-active magneto-rheological damper 2 in a spatial inclined symmetrical mode can effectively restrain the vibration generated by the inertia actuating mechanism 9 in all directions.
In this example, a speed sensor 4 is arranged at one end of each semi-active magnetorheological damper 2, which is connected with the adapter plate 1, in actual work, the inertia actuating mechanism 9 works to generate vibration, so as to drive the adapter plate 1 to vibrate, the spring 3 weakly attenuates the vibration of the adapter plate 1, and the low-pass filter converts a high-frequency vibration signal generated when the inertia actuating mechanism 9 normally works into a high-amplitude and low-frequency vibration signal. The control system 7 calculates real-time current required by the magneto-rheological damper 2 according to a mechanical model of the semi-active magneto-rheological damper 2 and real-time motion information acquired by the acceleration sensor 4, and provides the current provided by the direct-current power supply to the semi-active magneto-rheological damper 2 in real time, so that the semi-active magneto-rheological damper 2 generates required damping force, energy generated by vibration of the inertia execution mechanism 9 is dissipated, only a small part of the vibration of the inertia execution mechanism 9 is transmitted to a satellite, and influence on the performance of the satellite due to the vibration of the inertia execution mechanism 9 is reduced.
In conclusion, the semi-active vibration reduction platform of the inertia actuating mechanism based on the magneto-rheological damper, provided by the invention, can convert high-frequency vibration signals generated by the inertia actuating mechanism into low-frequency vibration signals, and can dissipate energy generated by vibration through the semi-active magneto-rheological damper 2, so that the influence of the vibration of the inertia actuating mechanism 9 on the effective sensitive load performance of each satellite can be obviously reduced, and the whole satellite performance is improved; the spring 3 and the semi-active magneto-rheological damper 2 are respectively arranged in a symmetrical, inclined and uniformly distributed manner from the outer edge to the middle and from the middle to the outside, and the arrangement manner can effectively inhibit the vibration generated by the inertia actuating mechanism 9 in each direction; the energy dissipation element is a semi-active magnetorheological damper 2, and the magnitude of the magnetic field intensity in the internal structure can be changed by adjusting the externally applied current, so that the rheological property of a fluid medium in the damper can be changed rapidly, the effect of changing the damping force in real time according to the requirement can be realized, and the vibration control precision is improved; the semi-active magneto-rheological damper 2 is connected to the adapter plate 6 and the connecting plate 1 only through the hinge shaft, so that the connection mode is simpler, redundant additional elements are not needed, the quality of the vibration damping platform is smaller, and the reliability is improved.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The utility model provides an inertia actuating mechanism semi-initiative damping platform based on magnetic current becomes attenuator which characterized in that includes: the device comprises an adapter plate (1), a connecting plate (6), at least three springs (3), at least three semi-active magnetorheological dampers (2), at least three acceleration sensors (4), a control system (7) and a direct-current power supply;
the adapter plate (1) is connected with an inertia actuating mechanism (9), the connecting plate (6) is connected with a satellite, the adapter plate (1) and the connecting plate (6) are arranged oppositely, and the adapter plate (1) is connected with the connecting plate (6) through the spring (3) and the semi-active magneto-rheological damper (2);
an acceleration sensor (4) is arranged at one end of each semi-active magnetorheological damper (2) connected with the adapter plate (1), and the deceleration sensors (4) are used for acquiring motion information of the vibration reduction platform;
the direct-current power supply and the control system (7) are fixedly arranged on the satellite;
the control system (7) is connected with each semi-active magnetorheological damper (2), each acceleration sensor (4) and the direct current power supply through circuits, and controls the current input quantity of each semi-active magnetorheological damper (2) according to the motion information.
2. Semi-active damping platform according to claim 1, characterized in that the first end of each spring (3) is fixedly connected to the central position of the adapter plate (1), the second end is inclined outwards at an angle and fixedly connected to the edge position of the connection plate (6), and a plurality of springs (3) are evenly distributed around the central axis of the adapter plate (1) and the central axis of the connection plate (6).
3. The semi-active vibration damping platform according to claim 2, wherein a first end of each semi-active magnetorheological damper (2) is rotatably connected with the edge of the adapter plate (1), a second end of each semi-active magnetorheological damper is inclined inwards by an angle and is rotatably connected with the central position of the connecting plate (6), and a plurality of semi-active magnetorheological dampers (2) are uniformly distributed around the central axis of the adapter plate (1) and the central axis of the connecting plate (6).
4. Semi-active damping platform according to claim 2, characterized in that bosses (11) are arranged in the center of the adapter plate (1) in the same number as the springs (3) and are evenly distributed around the center axis of the adapter plate (1), each boss (11) is connected to the first end of the corresponding spring (3), and the top of each boss (11) connected to the spring (3) is an inclined plane.
5. The semi-active vibration damping platform according to claim 4, characterized in that the edge of the connecting plate (6) is provided with a number of adapter blocks (8) which are uniformly distributed around the central axis of the connecting plate (6) and equal to the number of the springs (3), each adapter block (8) is provided with a spring adapter plate (5), each spring adapter plate (5) is connected with the second end of the corresponding spring (3), and the surface of each spring adapter plate (5) connected with the spring (3) is an inclined surface and is consistent with the inclination angle of the table top of the boss (11).
6. Semi-active damping platform according to claim 5, characterized in that the adapter block (8) and the spring adapter plate (5) are made of an aluminium alloy material.
7. A semi-active vibration damping platform according to claim 3, characterized in that a plurality of said semi-active magnetorheological dampers (2) are arranged one by one spaced from a plurality of said springs (3).
8. Semi-active vibration attenuation platform according to any of claims 1 to 7, characterized in that the number of said springs (3) and said semi-active magnetorheological dampers (2) is 3.
9. Semi-active damping platform according to one of claims 1 to 7, characterized in that the springs (3) are cut from carbon fibre reinforced aluminium composite tubing.
10. The semi-active vibration attenuation platform according to any one of claims 1 to 7, characterized in that the control system (7) calculates real-time currents required by the semi-active magnetorheological dampers (2) according to real-time motion information acquired by the acceleration sensors (4), and the control system (7) provides the currents provided by the direct current power supply to the semi-active magnetorheological dampers (2) respectively according to the calculated real-time currents, so that the semi-active magnetorheological dampers (2) generate corresponding damping forces and dissipate energy generated by the inertia executing mechanism (9) due to vibration.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607722A (en) * | 2022-03-31 | 2022-06-10 | 长光卫星技术股份有限公司 | Semi-active vibration isolation platform for optical remote sensing satellite micro-vibration and assembly method |
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