CN113235397A - Electromagnetic type shock mitigation system - Google Patents
Electromagnetic type shock mitigation system Download PDFInfo
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- CN113235397A CN113235397A CN202110585726.6A CN202110585726A CN113235397A CN 113235397 A CN113235397 A CN 113235397A CN 202110585726 A CN202110585726 A CN 202110585726A CN 113235397 A CN113235397 A CN 113235397A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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Abstract
The invention relates to an electromagnetic damping system, which is characterized by comprising a control unit and a damping device, wherein the damping device comprises: the electromagnetic valve comprises a shell, a first magnetic body and a second magnetic body are arranged in the shell, a first electromagnetic coil and a third electromagnetic coil are arranged in the first magnetic body, and a second electromagnetic coil and a fourth electromagnetic coil are arranged in the second magnetic body; the top end of the shell is provided with a through hole matched with the supporting rod, the control unit is respectively connected with the first electromagnetic coil, the second electromagnetic coil, the third electromagnetic coil and the fourth electromagnetic coil, the supporting seat is arranged at the top of the damping device, and the supporting seat is respectively provided with a vibration sensor, a displacement sensor, the supporting rod and a limiting block; the limiting block is arranged on the surface of the second magnet; the control unit respectively with vibrations sensor and displacement sensor link to each other, and then solve among the prior art and can't provide the shock attenuation inefficiency problem that the shock attenuation that corresponds the degree leads to the bridge to actual conditions.
Description
Technical Field
The invention relates to the technical field of bridge earthquake resistance, in particular to an electromagnetic type damping system.
Background
When the bridge is threatened by large load action such as earthquake, explosion, vehicle overload and impact, collision of a ship with a pier and the like, large impact destructive force and displacement are often generated at the pier-beam combination part, so that the pier-beam structure is damaged if the pier-beam structure is light, and collapse is caused if the pier-beam structure is heavy, thereby bringing harm to the life and property of people and the economic development of the nation. At present, the dynamic response of a pier-beam structure under a large impact load is reduced, and the buffering and vibration isolation capability of the pier-beam structure is improved, so that the pier-beam structure becomes a key problem to be solved urgently in the field of bridge structure impact protection engineering.
Although the traditional passive support has good vibration isolation and reduction performance under the action of general vibration load, the traditional passive support cannot intelligently adjust the rigidity of the traditional passive support under the impact of large load, improve the vertical strength to resist the impact force and large deformation, and cannot generate larger damping/deformation to dissipate instantaneous large energy, so that when an electromagnetic type damping system is used for damping, the traditional passive support lacks good compatibility of impact resistance and vibration isolation on the whole, cannot damp the vibration condition of an actual bridge, and easily causes the problem of low damping efficiency.
Disclosure of Invention
Therefore, the invention provides an electromagnetic damping system, which is used for solving the problem of low damping efficiency caused by the fact that damping with a corresponding degree cannot be provided for a bridge under actual conditions in the prior art.
In order to achieve the above object, the present invention provides an electromagnetic damping system, including a control unit and a damping device, wherein the damping device includes:
the electromagnetic valve comprises a shell, a first magnetic body and a second magnetic body are arranged in the shell, a first electromagnetic coil and a third electromagnetic coil are arranged in the first magnetic body, and a second electromagnetic coil and a fourth electromagnetic coil are arranged in the second magnetic body; the top end of the shell is provided with a through hole matched with the support rod; the control unit is respectively connected with the first electromagnetic coil, the second electromagnetic coil, the third electromagnetic coil and the fourth electromagnetic coil;
the supporting seat is arranged at the top of the damping device, and a vibration sensor, a displacement sensor, a supporting rod and a limiting block are respectively arranged on the supporting seat; the limiting block is arranged on the surface of the second magnet; the control unit is respectively connected with the vibration sensor and the displacement sensor;
a standard vibration frequency range F0 and a standard displacement threshold value E0 are preset in the control unit, when the electromagnetic type damping system damps vibration, the vibration sensor sends the detected actual vibration frequency F to the control unit, if F belongs to F0, the control unit judges that the vibration frequency meets the standard, and if the vibration frequency meets the standard, the control unit judges that the vibration frequency meets the standard
And the control unit judges that the vibration frequency does not meet the standard and calculates a vibration frequency difference value deltaF, and after the calculation is finished, the control unit adjusts the current in the electromagnetic coil according to the vibration frequency difference value deltaF.
Further, the control unit is provided with a first bridge weight a1, a second bridge weight a2, and a third bridge weight, i is 1,2,3 when the control unit determines that the bridge weight is Ai, the control unit sets the current in the first electromagnetic coil to R1i, sets the current in the third electromagnetic coil to R3i, and sets R1i to R3 i.
Further, the control unit is provided with a first vibration frequency difference Δ F1, a second vibration frequency difference Δ F2, a third vibration frequency difference Δ F3, a first current adjustment coefficient α 1, a second current adjustment coefficient α 2, a third current adjustment coefficient α 3 and a fourth current adjustment coefficient α 4, wherein Δ F1 < [ delta ] F2 < [ delta ] F3, 1 < α 2 < α 3 < α 4 < 2;
when the electromagnetic damping system is used for damping, the vibration sensor sends the detected actual vibration frequency F to the control unit, and when the actual vibration frequency F is detected, the electromagnetic damping system is used for damping
Then, the control unit judges that the vibration frequency does not meet the standard and calculates the vibration frequency difference value delta F;
when F is larger than Fmax, the control unit calculates a vibration frequency difference value according to the actual vibration frequency F detected by the vibration sensor, selects a corresponding current regulation coefficient according to the difference value to increase the current in the coil, and sets delta F to F-Fmax, wherein Fmax is the maximum value of a standard vibration frequency range preset by the control unit;
when af < af 1, the control unit selects a first current adjustment coefficient α 1 to increase the current in the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F1 and less than delta F2, the control unit selects a second current adjusting coefficient alpha 2 to increase the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F2 and less than delta F3, the control unit selects a third current adjusting coefficient alpha 3 to increase the current in the first electromagnetic coil to a corresponding value;
when the delta F is not less than the delta F3, the control unit selects a fourth current adjusting coefficient alpha 4 to increase the current of the first electromagnetic coil to a corresponding value;
when the control unit selects alpha i to adjust the current of the first electromagnetic coil, i is 1,2,3 and 4, the control unit records the adjusted current as R1', sets R1 to R1 multiplied by alpha i, and the control unit simultaneously adjusts the currents of the first electromagnetic coil and the third electromagnetic coil when the shock absorber operates.
Further, when the electromagnetic damping system damps the vibrations, the vibration sensor sends the detected actual vibration frequency F to the control unit, when
Then, the control unit judges that the vibration frequency does not meet the standard and calculates the vibration frequency difference value delta F;
when F is smaller than Fmin, the control unit calculates a vibration frequency difference value delta F according to the actual vibration frequency F detected by the vibration sensor, selects a corresponding current regulation coefficient according to the difference value to reduce the current in the coil, and sets the delta F to be Fmin-F, wherein Fmin is the minimum value of a standard vibration frequency range preset by the control unit;
when Δ F < Δf1, the control unit selects a first current adjustment coefficient α 1 to reduce the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F1 and less than delta F2, the control unit selects a second current adjusting coefficient alpha 2 to reduce the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F2 and less than delta F3, the control unit selects a third current adjusting coefficient alpha 3 to reduce the current of the first electromagnetic coil to a corresponding value;
when Δ F ≧ Δ F3, the control unit selects a fourth current adjustment coefficient α 4 to reduce the current of the first electromagnetic coil to a corresponding value.
Further, when F is larger than Fmax, the control unit compares the displacement E detected by the horizontal position sensor with a standard displacement threshold value E0, when E is smaller than or equal to E0, the central control unit judges that the displacement meets the standard, and when E is larger than E0, the control unit judges that the displacement does not meet the standard and energizes the second electromagnetic coil and the fourth electromagnetic coil to absorb shock.
Further, the control unit is provided with a first displacement difference Δ E1, a second displacement difference Δ E2, a third displacement difference Δ E3, a first second solenoid current increase Δ W1, a second solenoid current increase Δ W2, a third second solenoid current increase Δ W3, a fourth second solenoid current increase Δ W4, and sets that R2 is R4, where R2 represents a second solenoid current value and R4 represents a fourth solenoid current value;
when E is larger than E0, the control unit calculates a position difference value Delta E according to the displacement E detected by the horizontal position sensor and selects a corresponding second electromagnetic coil current increment according to the difference value, and the Delta E is set as E-E0;
when delta E <. DELTA.E 1, the control unit turns on the second and fourth electromagnetic coils and selects the first and second electromagnetic coil current increase delta W1 to increase the current of the second electromagnetic coil to a corresponding value;
when the delta E is more than or equal to delta E1 and less than delta E2, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a second electromagnetic coil current increase quantity delta W2 to increase the second electromagnetic coil current to a corresponding value;
when the delta E is not less than delta E2 and less than delta E3, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a third second electromagnetic coil current increment delta W3 to increase the second electromagnetic coil current to a corresponding value;
when the delta E is not less than the delta E3, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a fourth second electromagnetic coil current increment delta W4 to increase the second electromagnetic coil current to a corresponding value;
the control unit selects delta Wi and increases a second electromagnetic coil current as i being 1,2,3 and 4, the control unit records the regulated current of the second electromagnetic coil as R2', sets R2 as R2 plus delta Wi, and the control unit simultaneously regulates the currents of the second electromagnetic coil and the fourth electromagnetic coil when the shock absorption device works.
Further, the control unit is provided with a first maximum value R1max of the solenoid current when the electromagnetic damping system is damping
And E is less than or equal to E0, when the control unit detects that the adjusted first electromagnetic coil current R1 '> R1max, the control unit judges that the damping effect is not in accordance with the standard, sets the current of the first electromagnetic coil to R1max and supplies current to the second electromagnetic coil and the fourth electromagnetic coil, and when R1' is less than or equal to R1max, the control unit adjusts the current in the first electromagnetic coil and the third electromagnetic coil to corresponding values.
Further, the control unit is provided with a maximum adjustment number N0 and a second maximum solenoid current value R2max, and when the control unit completes one adjustment, the control unit sets the adjustment number N to 1, and when the electromagnetic damping system damps the vibration, the control unit sets N to N0 or R2' > R2max and the electromagnetic damping system damps the vibration
The control unit determines that the shock absorbing device has a failure and issues an alarm signal, and adjusts the second solenoid current to a corresponding value when N is N0 or R2' is ≦ R2max and F ∈ F0.
Compared with the prior art, the electromagnetic damping system has the advantages that the electromagnetic damping system adjusts the current of the electromagnetic coil to perform self-adaptive damping on the bridge by accurately mastering different vibration frequencies and vibration displacements of the bridge, so that the vibration condition of the bridge can be effectively reduced, the energy can be saved, and the problem of low damping efficiency caused by the fact that damping of a corresponding degree cannot be provided for the bridge according to actual conditions in the prior art is solved.
Further, the control unit is provided with bridge weight, and when electromagnetic type shock mitigation system carried out the shock attenuation, the control unit can select solenoid's electric current according to the weight of difference, through accurate selection electric current, can carry out the self-adaptation shock attenuation to the bridge, can effectually reduce the vibrations condition and the rate of saving energy of bridge, and then solved among the prior art and can't provide the shock attenuation inefficiency problem that the shock attenuation that corresponds the degree leads to the bridge to actual conditions.
Further, the control unit is provided with vibration frequency difference and current regulation coefficient, can carry out the self-adaptation shock attenuation to the bridge through accurate the size of controlling bridge vibrations condition and then accurate accuse current, can effectual reduction bridge vibrations condition and the rate of saving energy, and then solved among the prior art can't provide the shock attenuation inefficiency problem that the shock attenuation that corresponds the degree leads to the bridge to actual conditions.
Further, the control unit sets up first coil current difference value and second solenoid current increase volume, and when a set of coil current can't satisfy the shock attenuation demand, the control unit will start second group solenoid and carry out the shock attenuation to the bridge, through the size of controlling different solenoid currents, can carry out the self-adaptation shock attenuation to the bridge, can effectual reduction bridge the vibrations condition and the rate of saving energy, and then solved among the prior art and can't provide the shock attenuation inefficiency problem that the shock attenuation that corresponds the degree leads to the bridge to actual conditions.
Further, the control unit is provided with the maximum adjusting times and the maximum current value of the second electromagnetic coil, and through controlling the maximum adjusting times, the abrasion condition of the electromagnetic damping system can be accurately controlled, self-adaptive damping can be performed on the bridge, the vibration condition of the bridge can be effectively reduced, the energy can be saved, and the problem that in the prior art, the damping efficiency is low due to the fact that damping of the corresponding degree cannot be provided for the bridge according to the actual condition is solved.
Drawings
FIG. 1 is a structural diagram of an electromagnetic damping system according to the present invention;
1-main beam, 2-supporting seat, 3-supporting rod, 4-shell, 5-first electromagnetic coil, 6-first magnet, 7-second magnet, 8-second electromagnetic coil, 9-fixing nut, 10-third electromagnetic coil, 11-limiting block, 12-fourth electromagnetic coil and 13-connecting plate.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the system or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a structural diagram of an electromagnetic damping system according to the present invention includes a control unit (not shown) and a damping device, wherein the damping device includes:
a housing 4, wherein a first magnet 6 and a second magnet 7 are arranged in the housing, a first electromagnetic coil 5 and a third electromagnetic coil 10 are arranged in the first magnet 6, and a second electromagnetic coil 8 and a fourth electromagnetic coil 12 are arranged in the second magnet 7; the top end of the shell 4 is provided with a through hole matched with the support rod 3; the control unit is respectively connected with the first electromagnetic coil 5, the second electromagnetic coil 7, the third electromagnetic coil 10 and the fourth electromagnetic coil 12;
the supporting seat 2 is arranged at the top of the damping device, and a vibration sensor (not shown in the figure), a displacement sensor (not shown in the figure), a supporting rod 3 and a limiting block 11 are respectively arranged on the supporting seat; the limiting block 11 is arranged on the surface of the second magnet 7; the control unit is respectively connected with the vibration sensor and the displacement sensor;
specifically, the vibration of the main beam 1 is detected by using the vibration sensor, when the main beam 1 does not reach a set value or has no vibration, the second electromagnetic coil 8 and the fourth electromagnetic coil 12 do not work, when the first electromagnetic coil 5 and the third electromagnetic coil 10 are electrified, opposite acting force is generated, when the vibration of the main beam 1 reaches the set value of the vibration sensor 6, the first electromagnetic coil 5 and the third electromagnetic coil 10 start to work, the current connected into the first coil 12 and the second coil 15 is controlled by the control unit according to the vibration, the acting force generated on the first coil 12 and the second coil 15 and used for pulling the main beam 1 is adjusted, and energy can be saved.
Specifically, a standard vibration frequency range F0 and a standard displacement threshold value E0 are preset in the control unit, when the electromagnetic damping system damps vibration, the vibration sensor sends the detected actual vibration frequency F to the control unit, if F belongs to F0, the control unit judges that the vibration frequency meets the standard, and if the vibration frequency meets the standard, the control unit judges that the vibration frequency meets the standard
And the control unit judges that the vibration frequency does not meet the standard and calculates a vibration frequency difference value deltaF, and after the calculation is finished, the control unit adjusts the current in the electromagnetic coil according to the vibration frequency difference value deltaF.
Specifically, the control unit is provided with a first bridge weight a1, a second bridge weight a2, and a third bridge weight, i is 1,2,3 when the control unit determines that the bridge weight is Ai, the control unit sets the current in the first electromagnetic coil to R1i, sets the current in the third electromagnetic coil to R3i, and sets R1i to R3 i.
Specifically, the control unit is provided with a first vibration frequency difference Δ F1, a second vibration frequency difference Δ F2, a third vibration frequency difference Δ F3, a first current adjustment coefficient α 1, a second current adjustment coefficient α 2, a third current adjustment coefficient α 3 and a fourth current adjustment coefficient α 4, wherein Δ F1 < [ delta ] F2 < [ delta ] F3, 1 < α 2 < α 3 < α 4 < 2;
when the electromagnetic damping system is used for damping, the vibration sensor sends the detected actual vibration frequency F to the control unit, and when the actual vibration frequency F is detected, the electromagnetic damping system is used for damping
Then, the control unit judges that the vibration frequency does not meet the standard and calculates the vibration frequency difference value delta F;
when F is larger than Fmax, the control unit calculates a vibration frequency difference value according to the actual vibration frequency F detected by the vibration sensor, selects a corresponding current regulation coefficient according to the difference value to increase the current in the coil, and sets delta F to F-Fmax, wherein Fmax is the maximum value of a standard vibration frequency range preset by the control unit;
when af < af 1, the control unit selects a first current adjustment coefficient α 1 to increase the current in the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F1 and less than delta F2, the control unit selects a second current adjusting coefficient alpha 2 to increase the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F2 and less than delta F3, the control unit selects a third current adjusting coefficient alpha 3 to increase the current in the first electromagnetic coil to a corresponding value;
when the delta F is not less than the delta F3, the control unit selects a fourth current adjusting coefficient alpha 4 to increase the current of the first electromagnetic coil to a corresponding value;
when the control unit selects alpha i to adjust the current of the first electromagnetic coil, i is 1,2,3 and 4, the control unit records the adjusted current as R1', sets R1 to R1 multiplied by alpha i, and the control unit simultaneously adjusts the currents of the first electromagnetic coil and the third electromagnetic coil when the shock absorber operates.
In particular, the vibration sensor sends the actual vibration frequency F detected to the control unit when the electromagnetic damping system is damping, when it is active
Then, the control unit judges that the vibration frequency does not meet the standard and calculates the vibration frequency difference value delta F;
when F is smaller than Fmin, the control unit calculates a vibration frequency difference value delta F according to the actual vibration frequency F detected by the vibration sensor, selects a corresponding current regulation coefficient according to the difference value to reduce the current in the coil, and sets the delta F to be Fmin-F, wherein Fmin is the minimum value of a standard vibration frequency range preset by the control unit;
when Δ F < Δf1, the control unit selects a first current adjustment coefficient α 1 to reduce the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F1 and less than delta F2, the control unit selects a second current adjusting coefficient alpha 2 to reduce the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F2 and less than delta F3, the control unit selects a third current adjusting coefficient alpha 3 to reduce the current of the first electromagnetic coil to a corresponding value;
when Δ F ≧ Δ F3, the control unit selects a fourth current adjustment coefficient α 4 to reduce the current of the first electromagnetic coil to a corresponding value.
Specifically, when the electromagnetic damping system damps the vibration, when F is greater than Fmax, the control unit compares the displacement E detected by the displacement sensor with a standard displacement threshold value E0, when E is less than or equal to E0, the central control unit judges that the displacement meets the standard, and when E is greater than E0, the control unit judges that the displacement does not meet the standard and energizes the second electromagnetic coil and the fourth electromagnetic coil to damp the vibration.
Specifically, the control unit is provided with a first displacement difference Δ E1, a second displacement difference Δ E2, a third displacement difference Δ E3, a first second solenoid current increase Δ W1, a second solenoid current increase Δ W2, a third second solenoid current increase Δ W3, and a fourth second solenoid current increase Δ W4, and sets R2 ═ R4, where R2 represents a second solenoid current value and R4 represents a fourth solenoid current value;
when E is larger than E0, the control unit calculates a position difference value Delta E according to the displacement E detected by the horizontal position sensor and selects a corresponding second electromagnetic coil current increment according to the difference value, and the Delta E is set as E-E0;
when delta E <. DELTA.E 1, the control unit turns on the second and fourth electromagnetic coils and selects the first and second electromagnetic coil current increase delta W1 to increase the current of the second electromagnetic coil to a corresponding value;
when the delta E is more than or equal to delta E1 and less than delta E2, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a second electromagnetic coil current increase quantity delta W2 to increase the second electromagnetic coil current to a corresponding value;
when the delta E is not less than delta E2 and less than delta E3, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a third second electromagnetic coil current increment delta W3 to increase the second electromagnetic coil current to a corresponding value;
when the delta E is not less than the delta E3, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a fourth second electromagnetic coil current increment delta W4 to increase the second electromagnetic coil current to a corresponding value;
the control unit selects delta Wi and increases a second electromagnetic coil current as i being 1,2,3 and 4, the control unit records the regulated current of the second electromagnetic coil as R2', sets R2 as R2 plus delta Wi, and the control unit simultaneously regulates the currents of the second electromagnetic coil and the fourth electromagnetic coil when the shock absorption device works.
Specifically, the control unit is provided with a first maximum solenoid current value R1max when the electromagnetic damping system is damping, when the electromagnetic damping system is damping
And E is less than or equal to E0, when the control unit detects that the adjusted first electromagnetic coil current R1 '> R1max, the control unit judges that the damping effect is not in accordance with the standard, sets the current of the first electromagnetic coil to R1max and supplies current to the second electromagnetic coil and the fourth electromagnetic coil, and when R1' is less than or equal to R1max, the control unit adjusts the current in the first electromagnetic coil and the third electromagnetic coil to corresponding values.
Specifically, the control unit is provided with a maximum adjustment number N0 and a second maximum solenoid current value R2max, and when the control unit completes one adjustment, the control unit sets the adjustment number N equal to 1, and when the electromagnetic damping system damps the vibration, the control unit sets the adjustment number N equal to N0 or R2' > R2max and the electromagnetic damping system damps the vibration
The control unit determines that the shock absorbing device has a failure and issues an alarm signal, and adjusts the second solenoid current to a corresponding value when N is N0 or R2' is ≦ R2max and F ∈ F0.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An electromagnetic damping system, comprising a control unit and a damping device, wherein the damping device comprises:
the electromagnetic valve comprises a shell, a first magnetic body and a second magnetic body are arranged in the shell, a first electromagnetic coil and a third electromagnetic coil are arranged in the first magnetic body, and a second electromagnetic coil and a fourth electromagnetic coil are arranged in the second magnetic body; the top end of the shell is provided with a through hole matched with the support rod; the control unit is respectively connected with the first electromagnetic coil, the second electromagnetic coil, the third electromagnetic coil and the fourth electromagnetic coil;
the supporting seat is arranged at the top of the damping device, and a vibration sensor, a displacement sensor, a supporting rod and a limiting block are respectively arranged on the supporting seat; the limiting block is arranged on the surface of the second magnet; the control unit is respectively connected with the vibration sensor and the displacement sensor;
a standard vibration frequency range F0 and a standard displacement threshold value E0 are preset in the control unit, when the electromagnetic type damping system damps vibration, the vibration sensor sends the detected actual vibration frequency F to the control unit, if F belongs to F0, the control unit judges that the vibration frequency meets the standard, and if the vibration frequency meets the standard, the control unit judges that the vibration frequency meets the standard
And the control unit judges that the vibration frequency does not meet the standard and calculates a vibration frequency difference value deltaF, and after the calculation is finished, the control unit adjusts the current in the electromagnetic coil according to the vibration frequency difference value deltaF.
2. The electromagnetic damping system according to claim 1, wherein said control unit is provided with a first bridge weight a1, a second bridge weight a2 and a third bridge weight A3, i is 1,2,3 when said control unit determines the bridge weight as Ai, said control unit sets the current in said first electromagnetic coil to R1i, sets the current in said third electromagnetic coil to R3i, and sets R1i to R3 i.
3. The electromagnetic damping system according to claim 2, characterized in that said control unit is provided with a first vibration frequency difference Δ F1, a second vibration frequency difference Δ F2, a third vibration frequency difference Δ F3, a first current regulation coefficient α 1, a second current regulation coefficient α 2, a third current regulation coefficient α 3 and a fourth current regulation coefficient α 4, wherein Δ F1 < Δf2 < Δf3, 1 < α 2 < α 3 < α 4 < 2;
when the electromagnetic damping system is used for damping, the vibration sensor sends the detected actual vibration frequency F to the control unit, and when the actual vibration frequency F is detected, the electromagnetic damping system is used for damping
Then, the control unit judges that the vibration frequency does not meet the standard and calculates the vibration frequency difference value delta F;
when F is larger than Fmax, the control unit calculates a vibration frequency difference value according to the actual vibration frequency F detected by the vibration sensor, selects a corresponding current regulation coefficient according to the difference value to increase the current in the coil, and sets delta F to F-Fmax, wherein Fmax is the maximum value of a standard vibration frequency range preset by the control unit;
when af < af 1, the control unit selects a first current adjustment coefficient α 1 to increase the current in the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F1 and less than delta F2, the control unit selects a second current adjusting coefficient alpha 2 to increase the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F2 and less than delta F3, the control unit selects a third current adjusting coefficient alpha 3 to increase the current in the first electromagnetic coil to a corresponding value;
when the delta F is not less than the delta F3, the control unit selects a fourth current adjusting coefficient alpha 4 to increase the current of the first electromagnetic coil to a corresponding value;
when the control unit selects alpha i to adjust the current of the first electromagnetic coil, i is 1,2,3 and 4, the control unit records the adjusted current as R1', sets R1 to R1 multiplied by alpha i, and when the shock absorption device works, the control unit simultaneously adjusts the currents of the first electromagnetic coil and the third electromagnetic coil.
4. An electromagnetic damping system according to claim 3, characterized in that the vibration sensor sends the actual vibration frequency F detected to the control unit when the electromagnetic damping system is damping, when it is damping
Then, the control unit judges that the vibration frequency does not meet the standard and calculates the vibration frequency difference value delta F;
when F is smaller than Fmin, the control unit calculates a vibration frequency difference value delta F according to the actual vibration frequency F detected by the vibration sensor, selects a corresponding current regulation coefficient according to the difference value to reduce the current in the coil, and sets the delta F to be Fmin-F, wherein Fmin is the minimum value of a standard vibration frequency range preset by the control unit;
when Δ F < Δf1, the control unit selects a first current adjustment coefficient α 1 to reduce the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F1 and less than delta F2, the control unit selects a second current adjusting coefficient alpha 2 to reduce the current of the first electromagnetic coil to a corresponding value;
when the delta F is more than or equal to delta F2 and less than delta F3, the control unit selects a third current adjusting coefficient alpha 3 to reduce the current of the first electromagnetic coil to a corresponding value;
when Δ F ≧ Δ F3, the control unit selects a fourth current adjustment coefficient α 4 to reduce the current of the first electromagnetic coil to a corresponding value.
5. The electromagnetic damping system according to claim 4, wherein when the electromagnetic damping system damps the vibration, when F > Fmax, the control unit compares the displacement E detected by the displacement sensor with a standard displacement threshold E0, when E is less than or equal to E0, the central control unit determines that the displacement meets the standard, and when E > E0, the control unit determines that the displacement does not meet the standard and energizes the second electromagnetic coil and the fourth electromagnetic coil to damp the vibration.
6. The electromagnetic damping system according to claim 2, wherein said control unit is provided with a first displacement difference Δ E1, a second displacement difference Δ E2, a third displacement difference Δ E3, a first second solenoid current increase Δ W1, a second solenoid current increase Δ W2, a third second solenoid current increase Δ W3, a fourth second solenoid current increase Δ W4, and wherein R2 is R4, wherein R2 represents a second solenoid current value and R4 represents a fourth solenoid current value;
when E is larger than E0, the control unit calculates a position difference value Delta E according to the displacement E detected by the horizontal position sensor and selects a corresponding second electromagnetic coil current increment according to the difference value, and the Delta E is set as E-E0;
when delta E <. DELTA.E 1, the control unit turns on the second and fourth electromagnetic coils and selects the first and second electromagnetic coil current increase delta W1 to increase the current of the second electromagnetic coil to a corresponding value;
when the delta E is more than or equal to delta E1 and less than delta E2, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a second electromagnetic coil current increase quantity delta W2 to increase the second electromagnetic coil current to a corresponding value;
when the delta E is not less than delta E2 and less than delta E3, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a third second electromagnetic coil current increment delta W3 to increase the second electromagnetic coil current to a corresponding value;
when the delta E is not less than the delta E3, the control unit opens the second electromagnetic coil and the fourth electromagnetic coil and selects a fourth second electromagnetic coil current increment delta W4 to increase the second electromagnetic coil current to a corresponding value;
the control unit selects delta Wi and increases a second electromagnetic coil current as i being 1,2,3 and 4, the control unit records the regulated current of the second electromagnetic coil as R2', sets R2 as R2 plus delta Wi, and the control unit simultaneously regulates the currents of the second electromagnetic coil and the fourth electromagnetic coil when the shock absorption device works.
7. The electromagnetic damping system of claim 6, wherein the control unit is configured to provide a first maximum solenoid current value R1max when the electromagnetic damping system is damping
And E is less than or equal to E0, when the control unit detects that the adjusted first electromagnetic coil current R1 '> R1max, the control unit judges that the damping effect is not in accordance with the standard, sets the current of the first electromagnetic coil to R1max and supplies current to the second electromagnetic coil and the fourth electromagnetic coil, and when R1' is less than or equal to R1max, the control unit adjusts the current in the first electromagnetic coil and the third electromagnetic coil to corresponding values.
8. The electromagnetic damping system according to claim 1, wherein the control unit is configured with a maximum number of adjustments N0 and a second maximum solenoid current value R2max, wherein the control unit sets the number of adjustments N-1 when the control unit completes one adjustment, and wherein the electromagnetic damping system damps vibrations when N-0 or R2' > R2max is present
The control unit determines that the shock absorbing device has a failure and issues an alarm signal, and adjusts the second solenoid current to a corresponding value when N is N0 or R2' is ≦ R2max and F ∈ F0.
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| US20040150361A1 (en) * | 2003-02-05 | 2004-08-05 | Nissan Motor Co., Ltd. | Electromagnetic suspension system for vehicle |
| CN102998976A (en) * | 2012-11-14 | 2013-03-27 | 东南大学 | Online real-time control method for intelligent seismic reduction structure |
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