CN1227424C

CN1227424C - Active mass magnetic activation vibration controlling means

Info

Publication number: CN1227424C
Application number: CN 02132938
Authority: CN
Inventors: 欧进萍; 李惠; 张春巍
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-13
Filing date: 2002-09-13
Publication date: 2005-11-16
Anticipated expiration: 2022-09-13
Also published as: CN1482319A

Abstract

The present invention provides an active mass magnet driven vibration controller which comprises a mass block and the controller, wherein the lower part of the mass block is provided with a direct current exciting coil regarded as a secondary pole of a linear motor; the lower part of the mass block is provided with a sliding rail bed; the inner part of the sliding rail bed is provided with a long stator winding regarded as a primary pole of the linear motor. The present invention has the advantages of sensitive response, simple structure, low noise, high accuracy, etc.

Description

Magnetic drives the active mass damper vibration control apparatus

(1), affiliated field

What the present invention relates to is a kind of damping control device.Specifically a kind of damping control device that is used for civil engineering structure and offshore platform structure.

(2), background technology

Current; for guaranteeing the safety of civil engineering structure under dynamic actions such as earthquake and hurricane; alleviate the loss that natural calamity causes; the method that vibration control technology is protected structure has appearred introducing in civil engineering structure on traditional seismic design is set up defences the basis; concrete is exactly additional mechanism providing additional operation, support or power consumption damping unit on original structure; absorb dynamic actions such as earthquake and hurricane and input to the energy of structure, thereby reduce the dynamic response of structure self, reach the purpose of protection structure.Typical method is as being the various passive control methods of representative to increase rigidity and damping, come actively to apply certain energy to reduce the active control technology of its reaction, up to the mixing control and the half ACTIVE CONTROL method that grew up in the last few years according to the feedback of load and structural response to structure.The Passive Control means of traditional structural aseismatic design and immediate development only are to provide certain intensity, rigidity, ductility to improve to structure, but after load that structure suffers met and exceeded certain intensity, these methods did not only satisfy designing requirement but also be uneconomic.By contrast, ACTIVE CONTROL has special advantages aspect the strong dynamic loading of opposing.Trace it to its cause and be, ACTIVE CONTROL is utilized the feedback information of structural response, and in conjunction with suitable control algolithm, the drive unit in the command control system produces control, resist the effect of uncertain loads such as earthquake and hurricane jointly by controlling organization and structure, the dynamic response of structure is reduced.ACTIVE CONTROL makes structure possess capacity of self-regulation, can adjust control realization of goal feasible control decision rationally with adapting to, and therefore, its scope of application is wider, the control effect is more obvious.In numerous active control device, active mass damper (AMD) control system is a form comparatively ripe and that use.

What Fig. 9 provided is that existing AMD control system constitutes schematic diagram.Common AMD control system is by mass 26, start drive unit 24, and feedback transducer 21, measurement and the control device of forming at line computation 23, control chip 22 have spring in addition or damper 27 is formed.Wherein the start drive unit is mainly two kinds in hydraulic actuator or servomotor motor.Present widely used hydraulic actuator is the imitative moral product eighties; its complex structure, manufacturing cost height; will be with hydraulic oil and also will often change oil, troublesome maintenance, seal is many; regular meeting lost efficacy and caused the pusher cisco unity malfunction; adhesive work the time can be slipped the hook phenomenon, and starting and release time are slow, can not be used for the operating mode of snap action; operating frequency is low, and the occasion of frequent operation is inapplicable.Hydraulic system is regulated oil-feed and the fuel-displaced driving force that produces by oil circuit in addition, its reaction time is relatively slow, when the control that requires is comparatively meticulous, system can obviously strengthen the sensitiveness of time lag, this not only can reduce the service behaviour of system, do not reach desirable effect, also can bring the unsettled hidden danger of ACTIVE CONTROL simultaneously.Though servomotor has been done some improvement to hydraulic-driven, but owing to remain the contact power transmission, also have unsurmountable problem, it starts geological process or other emergencies that slowly may have little time to respond burst, under long duration load such as wind action, because slide rail contacts with mass, the dynamic friction meeting between contact surface consumes more energy, and produces bigger noise in its meeting in service.In addition, Ri Ben KUMG company has studied and has adopted the pneumatic AMD control system of making braking technique.But no matter be pneumatic or hydraulic-driven and rotating servo motor actuation techniques, they face the slow and low defective of control accuracy of reaction time.Therefore the research of carrying out novel actuator control device is imperative.

(3), summary of the invention

The object of the present invention is to provide a kind ofly be quick on the draw, magnetic simple in structure, that noise is low, accuracy is high drives the active mass damper vibration control apparatus.The object of the present invention is achieved like this: it comprises mass, control device and action driver, below mass, be provided with the slide rail bed, the formation of action driver comprises dc coil winding or the permanent magnet body that is installed in mass inside, and is installed in the AC coil winding in the slide rail bed.Device of the present invention can also comprise following architectural feature: 1, on the sidewall of the both sides of mass and slide rail bed the levitating electromagnet group is installed.2, the slide rail bed is provided with mass and supports ball.3, the sidewall of slide rail bed is provided with the guiding ball.4, the rectangular groove shape of slide rail bed is equipped with the anti-groups of springs of being rebuffed on two end walls of slide rail bed.5, the curved shape of slide rail bed, the curved shape in the bottom of mass.Device of the present invention is to overcome the slow and low defective of control accuracy of traditional AMD SRT, its start drive system is improved, the remainder of AMD system keeps, comprehensive magnetic suspension and the Motor Drive technology of adopting, with magnetic field mass is suspended, break away from and the contacting of track, use the Motor Drive mass motion, all contact elements (comprising actuator, spring and damper) in the alternative traditional AMD system.Become the contact power transmission and be the non-contact electromagnetic field power transmission, overcome many defectives of traditional AMD, receive many beneficial effects.Be mainly reflected in: adopt the Motor Drive technology that electric energy is directly changed into the mechanical energy of mass motion, without any need for the intermediate conversion transmission link, can be in high accuracy acting under the computer control, the speed of service is unrestricted.It can effectively overcome big, the shortcomings such as efficient is low, energy consumption is high, low precision, contaminated environment of volume when using hydraulic pressure or pneumatic actuation.Introduce magnetic levitation technology, AMD mass and slide rail bed can be separated fully, do not have with track during the mass motion mechanically contact, move the transmission component and do not have wearing and tearing, mechanical loss is low; Reliable, transmission efficiency is high, low cost of manufacture, be easy to safeguard, device or system noise is very little or noiseless, running environment is good.Form a complete magnetic like this and drive active mass damping AMD control system, it have energy-efficient, precision is high, stroke and the unrestricted characteristics of speed, it is advanced technically, be rational economically, and satisfy environmental requirement, can satisfy the needs of engineering practical application better, as be applied in civil engineering (highrise building, bridge bridge tower) structure opposing high wind and geological process, and ocean engineering (as oil drilling platform) structure is resisted occasions such as ice, earthquake, ocean stormy waves stream excited vibration.

(4), description of drawings

Fig. 1 is the vertical view that electromagnetic levitation type magnetic drives the active mass damper vibration control apparatus;

Fig. 2 is a kind of vertical section constructional drawing of Fig. 1;

Fig. 3 is the horizontal section constructional drawing of Fig. 1;

Fig. 4 is another longitudinal profile view of Fig. 1, i.e. the vertical section constructional drawing of arc track form;

The floated magnetic of Fig. 5 right and wrong drives the vertical view of active mass damper vibration control apparatus;

Fig. 6 is a kind of vertical section constructional drawing of Fig. 5;

Fig. 7 is the horizontal section constructional drawing of Fig. 5;

Fig. 8 is another longitudinal profile view of Fig. 5, i.e. the vertical section constructional drawing of arc track form;

Fig. 9 is the formation schematic diagram of existing traditional AMD system.

(5), specific embodiments

For example the present invention is described in more detail below in conjunction with accompanying drawing:

Embodiment one, and in conjunction with Fig. 1-Fig. 3, what it provided is a kind of embodiment structure that a kind of electromagnetic levitation type magnetic drives the active mass damper vibration control apparatus.It comprises mass 2, the inside of mass is equipped with dc coil winding 4, the below of mass is provided with slide rail bed 1, be provided with AC coil winding 3 in the slide rail bed, the rectangular groove shape of slide rail bed, the anti-groups of springs 5 of being rebuffed is installed on two end walls 7 of slide rail bed, on the sidewall of the both sides of mass and slide rail bed levitating electromagnet group 6 is installed.Adopt normal magnetic conduction suspension technology (EMS) or super-conductive magnetic suspension technology (EDS), on two sides of mass and the track relative, install levitating electromagnet or permanent magnet group with it, rely on its interactional attraction and repulsive force that quality is suspended, regulate hoverheight by changing the size that feeds electric current in the electromagnet.If do not need the suspended matter gauge block can save this step yet.Then, be installed in the slide rail bed, be installed in the mass being equivalent to the secondary dc coil winding of linear electric motors (also can be the permanent magnet body) being equivalent to the elementary AC coil winding of linear electric motors.At this moment, the AC coil winding that embeds in the slide rail bed will produce air-gap field after feeding three-phase symmetrical sine alternating current, and the distribution of its air-gap field 9 is that the direction of motion along mass is Sine distribution.When three-phase current changed in time, air-gap field moved along straight line by directed phase sequence, was the travelling-magnetic-field of translation.After the dc coil winding in the mass fed direct current, its (perhaps permanent magnet body) and air gap magnetic field interaction had just produced electromagnetic push, the active controlling force that structural vibration control that Here it is is required.At this moment, the slide rail bed is fixed, and mass is done rectilinear motion along the travelling-magnetic-field travel direction.Here galvanic amplitude in the frequency of alternating current in the slide rail bed and amplitude and the mass be can change simultaneously and the movement velocity and the direction of mass controlled.How the forms of motion of designing quality piece relates to the tight structural vibration control theory of a cover, does not belong to the scope of the present patent application, is not repeated.

Embodiment two, and in conjunction with Fig. 4, what it provided is the another embodiment structure that electromagnetic levitation type magnetic drives the active mass damper vibration control apparatus.The difference of it and a last embodiment is: slide rail bed 11 curved shapes, the curved shape in the bottom of mass 2.This arc track can be saved the space significantly, is particularly suitable for being installed in the limited building of plane space.Different with rectilinear orbit, adopt arc track should reduce the track cross level projection size as far as possible, obtain the little advantage that takes up room.And make mass and track that contact length as much as possible be arranged, to give full play to magnetic field efficient.AC coil winding 3 and dc coil winding 4 are done camber according to the curvature of track, be loaded on the top of arc track 11 and the bottom of mass 2 respectively, the curvature of track must be given through designing and calculating.In addition, the track construction of arc can also save the anti-structures such as spring and Bian Bi of being rebuffed, and surplus person and linear pattern track are identical.

Embodiment three, and in conjunction with Fig. 5-7, what it provided is the structure that a kind of non-floated magnetic drives the active mass damper vibration control apparatus.The difference of it and embodiment one is: the slide rail bed is provided with mass and supports ball 12.Can omit the suspension magnet group like this.Manufacturing cost is cheaper.

Embodiment four, and in conjunction with Fig. 8, what it provided is the structure that another kind of non-floated magnetic drives the active mass damper vibration control apparatus.The difference of it and embodiment three is: slide rail bed 11 curved shapes, the curved shape in the bottom of mass 2.

Claims

1, a kind of magnetic drives the active mass damper vibration control apparatus, it comprises mass, control device and action driver, it is characterized in that: below mass, be provided with the slide rail bed, the formation of action driver comprises dc coil winding or the permanent magnet body that is installed in mass inside, and is installed in the AC coil winding in the slide rail bed.

2, magnetic according to claim 1 drives the active mass damper vibration control apparatus, it is characterized in that: on the sidewall of the both sides of mass and slide rail bed the levitating electromagnet group is installed.

3, magnetic according to claim 1 drives the active mass damper vibration control apparatus, it is characterized in that: the slide rail bed is provided with mass and supports ball.

4, magnetic according to claim 1 drives the active mass damper vibration control apparatus, and it is characterized in that: the sidewall of slide rail bed is provided with the guiding ball.

5, drive the active mass damper vibration control apparatus according to claim 1,2,3 or 4 described magnetic, it is characterized in that: the rectangular groove shape of slide rail bed is equipped with the anti-groups of springs of being rebuffed on two end walls of slide rail bed.

6, drive the active mass damper vibration control apparatus according to claim 1,2,3 or 4 described magnetic, it is characterized in that: the curved shape of slide rail bed, the curved shape in the bottom of mass.