CN1844698A - Magnetorheological liquid damping type dynamic vibration absorber - Google Patents

Magnetorheological liquid damping type dynamic vibration absorber Download PDF

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CN1844698A
CN1844698A CNA2006100136134A CN200610013613A CN1844698A CN 1844698 A CN1844698 A CN 1844698A CN A2006100136134 A CNA2006100136134 A CN A2006100136134A CN 200610013613 A CN200610013613 A CN 200610013613A CN 1844698 A CN1844698 A CN 1844698A
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converter
control computer
main control
vibration
bearing support
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CN100346088C (en
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李连进
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TIANJIN BUSINESS COLLEGE
Tianjin University of Commerce
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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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
    • F16F9/535—Magnetorheological [MR] fluid dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/1005—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass
    • F16F7/1017—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass by fluid means

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention discloses a magnetic-flow liquid-variable damping power vibration absorber. Wherein, one side of main body is fixed with a vibration absorber; the main body has several layered sensors; the support is fixed to the side wall of main body; the support is concave; the end of guide rail is fixed to the side support wall of support; the guide rail is mounted with weight block; one end of lead screw is connected to the output of motor; the driving motor drives the guide rail to push weight block move reciprocally along the guide rail; around the guide rail, between the weight block and the support, there are at least two springs and magnetic-flow liquid-variable damper; the twp ends of spring magnetic-flow liquid-variable damper are connected to the bottom plates of weight block and support. The invention has significant damping effect, flexible operation, wider application, wider adjusting range, lower power consumption, high response speed and simple structure, while the maximum vibration acceleration response amplitude can be reduced to 9.8% of former one.

Description

Magnetorheological fluid damp type dynamic vibration absorber
Technical field
The present invention relates to a kind of vibration damping equipment that is applied on constructure body structure, highly sophisticated device process equipment agent structure, semiconductor chip manufacturing equipment agent structure, nanoprocessing machine body structure and the mechanical production devices agent structure, relate in particular to a kind of can STOCHASTIC CONTROL vibration, the Bandwidth of vibration damping, low frequency performance good, can regulate control force frequency and damping parameter, can realize the magnetorheological fluid damp type dynamic vibration absorber of " optimal tuning ".
Background technique
At present, though the bump leveller of number of different types has been arranged both at home and abroad, these bump levellers one are amplitude, frequency and the damping constants that can't regulate absorbing power simultaneously, and the regulation range of damping constant (or damping force) is too small; The 2nd, in installation process, do not consider of the influence of the quality of bump leveller to vibration system; The 3rd, each bump leveller can only corresponding single order modal vibration.
According to traditional Vibration Absorption Designing thought, the damping of common vibration insulating system is unsuitable excessive.If singly be from resonance control viewpoint, wish the damping value of increase system, reach and reduce the resonance transmissibility, with restriction resonance amplitude.In the common design method, a kind of is to make the resonant frequency of system avoid energizing frequency as far as possible, and bump leveller has less damping value near point of resonance, and other point has bigger damping value, to obtain the favorable damping design effect; Another kind is when the energizing frequency broad, when the resonant frequency of bump leveller and energizing frequency are very difficult close, can only suitably increase the damping value of system, make shock absorption system both have reasonable shock attenuation result, take into account resonance control again, amplification makes it to have certain control ability to resonance.From simple vibration damping angle, the increase of damping value can reduce effectiveness in vibration suppression.No matter this obviously practice is that resonance control or dither are isolated, and all can not reach the optimal design effect.Be to adapt to the optiumum control requirement of stochastic vibration, the Bandwidth of vibration damping, low frequency performance are good, make the equal can regulate of parameter such as control force frequency and damping, just become the task of top priority with the active damping dynamic shock absorber that can realize " optimal tuning ".
Summary of the invention
Main purpose of the present invention is to solve the problem that exists in the vibration damping equipment, and a kind of optiumum control requirement that can adapt to stochastic vibration is provided, and makes all adjustable magnetorheological fluid damp type dynamic vibration absorbers of parameter such as control force frequency and damping.
As everyone knows, vibration has its favourable one side as natural a kind of universal phenomenon, and its disadvantageous one side is also arranged, and the harm that it produces can not be ignored especially, and what vibration was produced simultaneously also receives much concern to human benefit.Along with the development and use of the progress and the development of science and technology, particularly high science and technology of society, traditional oscillation damping method is difficult to reach the requirement of highi degree of accuracy vibration damping under many occasions.For example, in processes such as semiconductor chip manufacturing and nanoprocessing, can under the random vibration environment of complexity, work effectively for making highly sophisticated device equipment, the stable vibration-isolating platform of its highi degree of accuracy that provides an energy that stochastic vibration is controlled must be provided, this has higher requirement to vibration control technology.Generally, the vibration insulating system that is constituted with damping and elastic element carries out vibration damping to precision instrument and equipment, and this vibration insulating system fully absorbs from the outer unrest that basis and equipment itself are produced is installed, and suppresses vibratory response.But, after on the vibration system bump leveller being installed, the one, the dynamic property of vibration system is changed, the natural frequency of vibratory response changes, and directly influences effectiveness in vibration suppression; The 2nd, the maximum vibration response point of vibration system may change, and reduces effectiveness in vibration suppression.And the frequency of extraneous excitation force also is a variable, is the function of time.Therefore, realize best vibration damping, amplitude, frequency and the damping constant of the vibration force that bump leveller is installed can both be changed, with the variation of outer unrest to satisfy " optimal tuning " control requirement in order to eliminate this vibration that evokes by the external world.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention installs bump leveller to the object structures main body that needs vibration control, and the object structures main body is subjected to the external force effect, and when stochastic vibration took place, the oscillatory differential equation of structural separation system was:
Figure A20061001361300041
In the formula: m I, jCapable, the j column element of i for the vibration system mass matrix;
c I, jCapable, the j column element of i for the vibration system damping matrix;
k I, jCapable, the j column element of i for the vibration system stiffness matrix;
Figure A20061001361300043
And Be respectively vibratory response displacement, speed and the acceleration of vibration system;
Figure A20061001361300045
For acting on the external force of vibration system.
If there is a damped type bump leveller to be installed on m the particle of vibration system, then by the inertial force that vibration produced of bump leveller mass block just damper by bump leveller and spring action on the m particle of system, an additional external force occurs, the vibratory response of vibration system is changed.
The structure of highly sophisticated device equipment and size are limited by the performance index of instrument and equipment mainly, are difficult to according to structural dynamic characteristic requirement after generally manufacturing and designing and make amendment, if can only revise design in the design phase when dynamic property does not seriously conform to technical order.For this reason, the best method of improving the vibration environment of instrument and equipment is to select then associated mass, spring rate and the damping constant of damped type bump leveller.Can draw vibration acceleration, speed and the displacement of the each point that the vibration system behind a plurality of bump levellers is installed with numerical computation method, these variablees all are to change with the parameter of damped type bump leveller to change, and the acceleration of concrete vibration system and displacement can be expressed as:
In the formula:
Figure A20061001361300047
Figure A20061001361300048
And
Figure A20061001361300049
Be respectively quality, rigidity and the damping constant of damped type bump leveller, wherein vectorial number is the number of bump leveller.
When the present invention finds the solution the parameter of damped type bump leveller with neural net method, need set up the equation and the error assessment function of controlling object and error assessment function, in the neuron network system, obtain the evaluating of vibration system.Consider the situation of carrying out absorbing with the m bump leveller, in whole frequency range, the quadratic nonlinearity evaluation function that is made of the acceleration and the displacement of vibration system is:
In the formula: r and g are respectively the displacement of vibration system and the acceleration factor of influence to evaluation function, and n is the unit number of vibration system after discrete, and ω is a vibration frequency.
In order to reduce the vibration of vibration system, need in total and research frequency range, obtain the parameter of the bump leveller of the J value minimum that makes formula (3).In the bump leveller design,, in whole absorbing frequency range, carry out the effect that time integral can obtain from the angle analysis of effective absorbing.Therefore, evaluation function just becomes nonlinear, can not be suitable for linear control theory.To such problem, construct one by input, middle and export three layers of neural network model that constitutes, set up the ask method of non-linear evaluation function that make for minimum bump leveller parameter.
With formula (3) discretization, become the form that can carry out numerical calculation, the new representation of formula (3) is as follows:
In the formula: s iIt is the surface area of i unit.
If k bump leveller is installed on vibration system, then the bump leveller parameter with vector representation is:
Figure A20061001361300052
Parameter with bump leveller As the input of nerve network system, the nonlinear quadratic shape objective function of nerve network system output is represented with T.Further, with non-linear evaluation function J nExport target function T with neuron network nConstitute an error assessment function, that is:
E n＝(J n，k-T n，k) 2/2 (6)
For asking the error assessment function that makes following formula is the bump leveller parameter of the neuron network input vector of minimum, be optimized design.As finding the solution E nMinimum value or minimizing method adopt steepest descent method.That is error assessment function E, nIt is the export target function T of neuron network nWith evaluation function J nThe evaluation function of formation, it is to input vector Differential represent with following formula:
∂ E n ∂ x i = ( J n - T n ) ( J n ∂ x i - T n ∂ x i ) - - - ( 7 )
Represent evaluation function J with difference form n, then:
∂ J n ∂ x i = 3 J n - 4 J n - 1 + J n - 2 2 ( x i , n - x i , n - 1 ) - - - ( 8 )
The export target function T nIt is input vector
Figure A20061001361300058
The interlayer attachment coefficient And the function of input and output-transfer function, the export target function T behind the differential nAs follows:
∂ T n ∂ x i = u c o c ( 1 - o c ) [ Σ j = 1 4 u b , j w bc , j o b , j ( 1 - o b , j ) u a , i w ab , ij o a , i ( 1 - o a , i ) ] - - - ( 9 )
In the formula: o cBe the output of output layer; o B, jBe the output of j the node in mesosphere; o A, iBe the output of i node of input layer; u cBe the input and the output-transfer function value of output layer; u B, jBe the input and the output-transfer function value of j the node in mesosphere; u A, iBe the input and the output-transfer function value of i node of input layer; w Ab, ijIt is the attachment coefficient of j node of i node and mesosphere of input layer; w Bc, jIt is the attachment coefficient of j node in mesosphere and output layer.
In formula (8) and formula (9) substitution formula (7):
∂ E n ∂ x i = ( J n , k - T n , k ) { 3 J n - 4 J n - 1 + J n - 2 2 ( x i , n - x i , n - 1 ) - u c o c ( 1 - o c ) [ Σ j = 1 4 u b , j w bc , j o b , j ( 1 - o b , j ) u a , i w ab , ij o a , i ( 1 - o a , i ) ] } - - - ( 10 )
In optimal design, from certain point Set out and seek objective function E nThe direction of search of minimum value is the negative gradient direction of this point, makes near the scope of functional value this point decline the fastest along the search of this direction.By the continuous walking of this rule, form following iterative algorithm:
x i , n = x i , n - 1 - η ∂ E n ∂ x i ( n = 0,1,2,3,4 , . . . . . . ) - - - ( 11 )
In the formula (11), along objective function E nEver-reduced direction is revised input function continuously---and the bump leveller parameter finally makes objective function E nObtain minimum value.η is the optimum stepsize of linear search, finds the solution with the extremum conditions that satisfies objective function.
For nonlinear input-output characteristic being provided for each neuron network unit, adopt common S type curve as input-output function, this curve calculates neuron network very big influence.In the past, all neuron network unit all adopted same S type curve, and the S type curve that the present invention adopts is and this input x iRelevant with output-transfer function with the input of last time, its formula is as follows:
u n , j = f ( x n , i , u n - 1 , j ) = 1 1 + exp ( - x n , i · u n - 1 , j ) - - - ( 12 )
In S type curve, if the occasion that the index of exponential function is very little, the linearity of function is got up by force, the simulation capacity that neuron network is calculated just reduces, and, the output quantity of output layer all can weaken the sensitivity of interlayer attachment coefficient and the reduction value that input layer is imported, and the suitable time of spend is calculated in convergence; Otherwise, if the very large occasion of the index of exponential function, the linearity of function is got up by force, the simulation capacity that neuron network is calculated also will reduce, itself becomes switch function function, the output of each neuron network unit all only gets 0 or 1, and the efficient and the calculation accuracy of simulation calculation extremely descend, sometimes even cause and can't calculate.Therefore, the optimum value of the index of S type curve should be the numerical value between two extreme values (0 or 1), and this optimum value is got different numerical value in each neuron network unit.Consider from the labyrinth and the computational speed aspect of neuron network, when beginning to calculate, set initial input output transfer function u 0, j, then, in calculating, be the error of the objective function that reduces output layer as early as possible, be necessary to continue to optimize the index of the exponential function of S type curve.In the bump leveller design, the index that limits S type curve is in following scope:
|x n，i·u n-1，i|≤2.1 (13)
For asking the error that makes objective function is the interlayer attachment coefficient w of the neuron network of minimum Ab, ij, be that method is passed in the anti-pass of fundamental construction error with the steepest descent method, as progressive interlayer attachment coefficient w Ab, ijComputational methods be shown below:
w ab，ij(n+1)＝w ab，ij(n)-μ·u n，j (14)
In the formula: w Ab, ijIt is the attachment coefficient of i node of input layer a and j node of mesosphere b; u N, jBe the input and the output-transfer function of j the node in mesosphere; μ is a shrinkage coefficient, expression is each calculate revise size less than 1 positive number.In nerve network system, generally follow output that reduces output layer and the error amount that objective function instructs signal, pass the sensitivity that method is calculated the neural unit that constitutes nerve network system with anti-pass, obtain the interlayer attachment coefficient according to the order in output layer, mesosphere, referring to Fig. 3, Fig. 4.
The vibration amplitude of installing behind the bump leveller reduces effect, contrast after testing, and it is original 9.8% that maximum vibration acceleration response amplitude can reduce to, referring to Fig. 5 and Fig. 6.
One side of main structure body fixedly installs bump leveller, main structure body successively is provided with plurality of sensors, the bearing support of bump leveller and the sidewall of main structure body are connected to a fixed, the integral body of bearing support is spill, be provided with at least two on the bearing support with upper rail, the end of guide rail and the side of bearing support are propped up wall and are connected to a fixed, mass block is set on the guide rail, one end of leading screw is connected with the output terminal of motor, mass block is run through in the other end of leading screw, and drive motor drives leading screw and promotes mass block along the reciprocal translation of guide rail.
Bump leveller is to be made of the linear motor that has linear rail, leading screw, bearing support, magnetic rheological liquid damper and metal spring.Bearing support is that base plate and side are propped up the wall composition, and sectional area is " recessed " shape; The other end of the leading screw of linear motor is vertically mounted on the side of bearing support relatively and props up on the wall.Motor can adopt electric rotating machine mate gear speed reducer and screw mechanism, can also adopt electric rotating machine mate gear speed reducer and pinion and rack.
Prop up between the wall around leading screw in the side of mass block and bearing support and to be provided with at least two with upper spring, the two end part of spring are propped up wall with the side of mass block and bearing support separately and are connected to a fixed.
2N metal spring is installed in respectively between bearing support and the mass block, and spring and linear rail opposing parallel are provided with, and N is 1-4.
Prop up between the wall around leading screw in the side of mass block and bearing support at least two above magnetic rheological liquid dampers are set, the two end part of magnetic rheological liquid damper are propped up wall with the side of mass block and bearing support separately and are connected to a fixed.
Magnetic flow liquid is adding its rheology dynamic characteristic generation rapid change under the action of a magnetic field, can be increased by the liquid condition of good fluidity viscosity in the short time (Millisecond), and present the state of similar solid, and its intensity is characterized by shear yield stress; And this variation is continuous, reversible, promptly in case after removing magnetic field, becoming again can flowing liquid.Utilize this specific character of magnetic flow liquid to make a kind of damping controllable devices--magnetic rheological liquid damper, its working principle is to regulate the magnetic field of the electric current acquisition varying strength in the field coil, make that the flow characteristic of magnetic flow liquid changes in the damp channel, thereby change the damping force of vibration damper.Magnetic rheological liquid damper can adopt the electromagnetic type damper, and 2n magnetic rheological liquid damper is installed in respectively between bearing support and the mass block, and magnetic rheological liquid damper and linear rail opposing parallel are provided with, and N is 1-4.
The vibration frequency of sensor collection structure main body, sensor is connected with main control computer with A/D converter by amplifier, sensor sends vibration frequency to main control computer by amplifier and A/D converter, A/D converter converts the vibration frequency of sensor collection structure main body to numerical information and sends main control computer to, motor is connected with main control computer with D/A converter by electric motor controller, main control computer sends instruction by D/A converter and electric motor controller to motor according to the vibration frequency range of main structure body after integrated information is handled, motor transmits the information of the operation of motor to main control computer by electric motor controller and D/A converter.
The present invention is made of metal spring, magnetic rheological liquid damper, additional mass and controller, computer flows to controller with movement instruction, the controller drives linear motor seesaws, linear motor drives additional mass and moves, the decrement of additional mass control metal spring and the movement velocity of magnetic rheological liquid damper piston rod, thereby produce the inertial force and the damping force of different frequency, be installed in the magnetorheological fluid damp type bump leveller on the main structure body and need the vibration damping object to constitute vibration insulating system together.
Sensor is connected with amplifier, and amplifier is connected with A/D converter, and A/D converter is connected with main control computer.The vibration frequency of sensor bar structure main body passes to amplifier, and the vibration frequency that amplifier is collected sensor is amplified and passed to A/D converter, and A/D converter converts the vibration frequency of amplifying to numerical information and sends main control computer to.Main control computer is connected with D/A converter, and D/A converter is connected with electric motor controller, and electric motor controller is connected with motor.Main control computer sends instruction and passes to D/A converter after integrated information is handled, the instruction that D/A converter sends main control computer is carried out numerical information conversion and is passed to electric motor controller, and electric motor controller is according to the instruction actuating motor of main control computer or close motor or change the rotating speed of motor.
Change inertial force (stiffness term) and excited frequency, utilize the variation of electric current [strength in the electromagnetic coil to change damping constant easily by the displacement distance of motor and the variation of speed, make the present invention have the favorable damping performance, thereby provide good service condition for the vibration control under the high-accuracy environment.
The present invention installs bump leveller to the object structures main body that needs vibration control, its dynamic characteristic is changed, changed the initial conditions of bump leveller design, the maximum vibration response point of structure will change, modal mass, spring force, damping force also all change, and the result makes the optimal design value of bump leveller depart from actual demand.Under the arbitrary excitation effect, mechanical structure has the response spectrum of continuous distributed, just comprising multiple frequency component, theory according to the only corresponding control first natural frequency of existing each bump leveller, the vibration damping of main structure body needs countless bump levellers, and several bump levellers can be set on main structure body.The present invention is directed to the vibration system under the different random vibration environment, the quadratic sum of setting up with displacement structure and acceleration based on nerual network technique is the objective function of minimum, try to achieve best position, quality and the damping constant of bump leveller and the excursion of stiffness coefficient by numerical computation method, make bump leveller obtain best effectiveness in vibration suppression.
The present invention measures the vibration frequency range that needs vibration damping object structures main body as required; Determine to set up with principal mass displacement variance minimum as objective function based on nerual network technique; Utilize numerical value emulation method to determine the mounting point of vibration damper and the excursion of quality and damping constant and stiffness coefficient; Utilize above-mentioned parameter to finish the installation bump leveller.Mounting point, quality, damping constant and stiffness coefficient according to bump leveller are input variable, as objective function, are determined that the input variable of the best is made function software by the displacement variance minimum of vibration damping object.In installation process, adopt mounting point, quality and obtained to control the method for the vibration of multistage mode with a spot of magnetorheological fluid damp type dynamic vibration absorber by the displacement variance parameter of vibration damping object.
When the present invention used, bearing support firmly is installed in to be needed on the object structures of the vibration damping main body, and the linear motor, metal spring, magnetic rheological liquid damper and the relevant controlling device that are had associated mass by bearing support constitute bump leveller.Utilize the movement velocity and the displacement distance size of direct current motor to change inertial force (stiffness term) and control force frequency; Because the size of electric current becomes non-linear relation with damping, utilize the variation of electric current [strength in the electromagnetic coil can change damping constant easily, thereby for the ACTIVE CONTROL of vibration provides simple condition, make dynamic shock absorber have good nonlinear vibration reduction performance, keep best " together with shaking " state of a control always.Need carry out the object structures main body of vibration control because the installation of dynamic shock absorber can make the dynamic characteristic of its structure change; The frequency spectrum that is subjected to the structural response of arbitrary excitation to have continuous distributed is comprising various frequency components.At the vibration system under the different random vibration, setting up with principal mass displacement variance based on nerual network technique is the objective function of minimum, try to achieve the mounting point of vibration damper and the excursion of quality, damping constant and stiffness coefficient by numerical simulation, make vibration damper obtain best effectiveness in vibration suppression.
The present invention is a magnetorheological fluid damp type dynamic vibration absorber.Rational in infrastructure, design science, effectiveness in vibration suppression is obvious, flexible operation, applied range, MR damper have that regulation range is wide, low in energy consumption, speed of response is fast, simple in structure, can the STOCHASTIC CONTROL vibration, the Bandwidth of vibration damping, low frequency performance good, can regulate control force frequency and damping parameter, can realize characteristics such as " optimal tunings ".The present invention is needing on the object structures main body of vibration damping, utilizes the point-to-point speed of direct current motor and displacement distance size to change inertial force (stiffness term) and control force frequency; Utilize the size of current in the magnetic flow liquid to become the characteristics of non-linear relation to adopt magnetic rheological liquid damper with damping, change damping constant easily, thereby, make active damper have good nonlinear vibration reduction performance for the ACTIVE CONTROL of vibration provides simple condition; At the vibration system under the stochastic vibration, set up with principal mass displacement variance minimum as objective function based on neural net method, determine the mounting point of vibration damper and the excursion of quality and damping constant and stiffness coefficient by the numerical simulation method, make bump leveller obtain best shock attenuation result, can adapt to the optiumum control requirement of stochastic vibration, make the equal can regulate of parameter such as control force frequency and damping, maximum vibration acceleration response amplitude can reduce to original 9.8%.The present invention is widely used in the vibration damping equipment of technical fields such as constructure body structure, highly sophisticated device process equipment agent structure, semiconductor chip manufacturing equipment agent structure, nanoprocessing machine body structure and mechanical production devices agent structure, and the excellent development prospect is arranged in the vibration damping field.
Description of drawings
Below in conjunction with drawings and Examples to the detailed description of the invention.
The schematic representation of Fig. 1 magnetorheological fluid damp type dynamic vibration absorber
The circuit connection diagram of Fig. 2 magnetorheological fluid damp type dynamic vibration absorber
Fig. 3 neuron network computing block diagram
Fig. 4 neural network model figure
The effectiveness in vibration suppression comparison diagram of the main structure body of Fig. 5 magnetorheological fluid damp type bump leveller
The effectiveness in vibration suppression comparison diagram of the main structure body of Fig. 6 magnetorheological fluid damp type bump leveller
1 motor, 2 mass blockes, 3 magnetic rheological liquid dampers, 4 springs, 5 guide rails, 6 sensors, 7 main structure bodies, 8 bearing supports, 9 bump levellers, 10 leading screws
Embodiment
Embodiment 1
One side of main structure body (7) fixedly installs bump leveller (9), main structure body (7) successively is provided with plurality of sensors (6), the bearing support (8) of bump leveller (9) is connected to a fixed with the sidewall of main structure body (7), the integral body of bearing support (8) is spill, bearing support (8) is gone up and is provided with at least two with upper rail (5), and the side of the end of guide rail (5) and bearing support (8) is propped up wall and is connected to a fixed.
Mass block (2) is set on the guide rail (5), one end of leading screw (10) is connected with the output terminal of motor (1), mass block (10) is run through in the other end of leading screw (10), and drive motor (1) drives leading screw (10) and promotes mass block (2) along back and forth translation of guide rail (5).
Prop up between the wall in the side of mass block (2) and bearing support (8) and to be provided with at least two on every side with upper spring (4) along leading screw (10), the two end part of spring (4) are propped up wall with the side of mass block (2) and bearing support (8) separately and are connected to a fixed.
Prop up between the wall in the side of mass block (2) and bearing support (8) and at least two above magnetic rheological liquid dampers (3) to be set on every side along leading screw (10), the two end part of magnetic rheological liquid damper (3) are propped up wall with the side of mass block (2) and bearing support (8) separately and are connected to a fixed, as shown in Figure 1 and Figure 2.
Embodiment 2
The vibration frequency of sensor (6) collection structure main body (7), sensor (6) is connected with main control computer with A/D converter by amplifier, sensor (6) sends vibration frequency to main control computer by amplifier and A/D converter, A/D converter converts the vibration frequency of sensor (6) collection structure main body to numerical information and sends main control computer to, motor (1) is connected with main control computer with D/A converter by electric motor controller, main control computer sends instruction by D/A converter and electric motor controller to motor (1) according to the vibration frequency range of main structure body (7) after integrated information is handled, motor (1) transmits the information of the operation of motor (1) by electric motor controller and D/A converter to main control computer, as Fig. 1, shown in Figure 2.
Embodiment 3
Sensor (6) is connected with amplifier, and amplifier is connected with A/D converter, and A/D converter is connected with main control computer.The vibration frequency of sensor (6) bar structure main body passes to amplifier, and the vibration frequency that amplifier is collected sensor (6) is amplified and passed to A/D converter, and A/D converter converts the vibration frequency of amplifying to numerical information and sends main control computer to.Main control computer is connected with D/A converter, and D/A converter is connected with electric motor controller, and electric motor controller is connected with motor; Main control computer sends instruction and passes to D/A converter after integrated information is handled, the instruction that D/A converter sends main control computer is carried out the numerical information conversion and is passed to electric motor controller, electric motor controller is according to the instruction actuating motor of main control computer, as shown in Figure 1 and Figure 2.
Embodiment 4
Sensor (6) is connected with amplifier, and amplifier is connected with A/D converter, and A/D converter is connected with main control computer.The vibration frequency of sensor (6) bar structure main body passes to amplifier, and the vibration frequency that amplifier is collected sensor (6) is amplified and passed to A/D converter, and A/D converter converts the vibration frequency of amplifying to numerical information and sends main control computer to.Main control computer is connected with D/A converter, and D/A converter is connected with electric motor controller, and electric motor controller is connected with motor.Main control computer sends instruction and passes to D/A converter after integrated information is handled, the instruction that D/A converter sends main control computer is carried out the numerical information conversion and is passed to electric motor controller, electric motor controller cuts out motor according to the instruction of main control computer, as shown in Figure 1 and Figure 2.
Embodiment 5
Sensor (6) is connected with amplifier, and amplifier is connected with A/D converter, and A/D converter is connected with main control computer.The vibration frequency of sensor (6) bar structure main body passes to amplifier, and the vibration frequency that amplifier is collected sensor (6) is amplified and passed to A/D converter, and A/D converter converts the vibration frequency of amplifying to numerical information and sends main control computer to.Main control computer is connected with D/A converter, and D/A converter is connected with electric motor controller, and electric motor controller is connected with motor.Main control computer sends instruction and passes to D/A converter after integrated information is handled, the instruction that D/A converter sends main control computer is carried out the numerical information conversion and is passed to electric motor controller, electric motor controller is according to the rotating speed of the instruction variation motor of main control computer, as shown in Figure 1 and Figure 2.

Claims (2)

1, a kind of magnetorheological fluid damp type dynamic vibration absorber, a side that it is characterized in that main structure body (7) fixedly installs bump leveller (9), main structure body (7) successively is provided with plurality of sensors (6), the bearing support (8) of bump leveller (9) is connected to a fixed with the sidewall of main structure body (7), the integral body of bearing support (8) is spill, bearing support (8) is gone up and is provided with at least two with upper rail (5), the side of the end of guide rail (5) and bearing support (8) is propped up wall and is connected to a fixed, mass block (2) is set on the guide rail (5), one end of leading screw (10) is connected with the output terminal of motor (1), mass block (10) is run through in the other end of leading screw (10), and drive motor (1) drives leading screw (10) and promotes mass block (2) along back and forth translation of guide rail (5); Prop up between the wall in the side of mass block (2) and bearing support (8) and to be provided with at least two on every side with upper spring (4) along leading screw (10), the two end part of spring (4) are propped up wall with the side of mass block (2) and bearing support (8) separately and are connected to a fixed; Prop up between the wall in the side of mass block (2) and bearing support (8) and along leading screw (10) at least two above magnetic rheological liquid dampers (3) to be set on every side, the two end part of magnetic rheological liquid damper (3) are propped up wall with the side of mass block (2) and bearing support (8) separately and are connected to a fixed; The vibration frequency of sensor (6) gleanings main structure body (7), sensor (6) is connected with main control computer with A/D converter by amplifier, sensor (6) sends vibration frequency to main control computer by amplifier and A/D converter, A/D converter converts the vibration frequency of sensor (6) collection structure main body to numerical information and sends main control computer to, motor (1) is connected with main control computer with D/A converter by electric motor controller, main control computer sends instruction by D/A converter and electric motor controller to motor (1) according to the vibration frequency range of main structure body (7) after integrated information is handled, motor (1) transmits the information of the operation of motor (1) to main control computer by electric motor controller and D/A converter.
2, magnetorheological fluid damp type dynamic vibration absorber according to claim 1 is characterized in that described sensor (6) is connected with amplifier, and amplifier is connected with A/D converter, and A/D converter is connected with main control computer; The vibration frequency of sensor (6) bar structure main body passes to amplifier, and the vibration frequency that amplifier is collected sensor (6) is amplified and passed to A/D converter, and A/D converter converts the vibration frequency of amplifying to numerical information and sends main control computer to; Main control computer is connected with D/A converter, and D/A converter is connected with electric motor controller, and electric motor controller is connected with motor; Main control computer sends instruction and passes to D/A converter after integrated information is handled, the instruction that D/A converter sends main control computer is carried out numerical information conversion and is passed to electric motor controller, and electric motor controller is according to the instruction actuating motor of main control computer or close motor or change the rotating speed of motor.
CNB2006100136134A 2006-05-08 2006-05-08 Magnetorheological liquid damping type dynamic vibration absorber Expired - Fee Related CN100346088C (en)

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CN104764575A (en) * 2014-01-03 2015-07-08 天津航天瑞莱科技有限公司 Combined vibration test apparatus and method
CN108422258A (en) * 2018-03-13 2018-08-21 哈尔滨理工大学 A kind of intelligent vibration damping platform for splicing mold processing
CN114248813A (en) * 2021-11-29 2022-03-29 同济大学 Variable-damping dynamic vibration absorber for railway vehicle

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CN88200728U (en) * 1988-01-30 1988-12-14 中国机械工程学会工业技术咨询服务公司 Hardness tester
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CN1291175C (en) * 2002-09-26 2006-12-20 天津理工学院 Magnetorheological fluid damp type dynamic vibration absorber and method of mounting thereof
JP2004208026A (en) * 2002-12-25 2004-07-22 Minolta Co Ltd Solid-state image pickup device
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CN103676773A (en) * 2013-11-13 2014-03-26 西安理工大学 Vibration controller, and optimal control method with vibration controller applied to deep hole working tool system
CN103676773B (en) * 2013-11-13 2016-04-06 西安理工大学 Vibrating controller and be applied to the method for optimally controlling of deep hole processing cutter system
CN104764575A (en) * 2014-01-03 2015-07-08 天津航天瑞莱科技有限公司 Combined vibration test apparatus and method
CN104764575B (en) * 2014-01-03 2017-08-25 天津航天瑞莱科技有限公司 One kind joint vibration testing device and method
CN108422258A (en) * 2018-03-13 2018-08-21 哈尔滨理工大学 A kind of intelligent vibration damping platform for splicing mold processing
CN114248813A (en) * 2021-11-29 2022-03-29 同济大学 Variable-damping dynamic vibration absorber for railway vehicle

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