32results about How to "Improve vibration control effect" patented technology

The invention relates to a signal conditioning system for improving the low-frequency measurement performance of an acceleration sensor. The signal conditioning system comprises a charge integration circuit, a high-pass filter circuit, a lead-lag network, an anti-aliasing filter circuit and a gain adjustment circuit. The input end of the charge integration circuit is connected with the acceleration sensor; the output end of the charge integration circuit is connected with the input end of the high-pass filter circuit; wherein the output end of the high-pass filter circuit is connected with theinput end of the lead-lag network, the output end of the lead-lag network is connected with the input end of the anti-aliasing filter circuit, and the output end of the anti-aliasing filter circuit is connected with the input end of the gain adjustment circuit. The low-frequency vibration control effect of an active vibration reduction system is improved, and then accurate measurement of vibration by the sensor is achieved.

The present invention is cylinder induction type self sensing method and system for MR damper. One induction coil is wound onto the cylinder of single-cylinder piston type MR damper and excited with the harmonic magnetic field of the exciting coil wound on the piston head of the MR damper to output information of relative displacement state between the piston rod and the cylinder, and this constitute the basic structure of cylinder induction type integrated relative displacement sensor. One active magnetoelectric relative displacement sensor is integrated to the MR damper structure to realize the real-time detection of relative displacement information between the controlled target and the supporting body. The continuous damping force controlling characteristic of magnetic reological fluid damper is combined to make the semi-active damping system of MR damper possess continuously controllable self sensing and damping force.

The present invention provides a vacuum pump capable of suppressing the structure from becoming complicated and improving the damping effect. The vacuum pump includes: a holding mechanism for clamping an outer race of the ball bearing in an axial direction and holding the outer race so that the outer race moves along a radial direction; and an elastic member disposed at an outer circumferential side of the outer race. The elastic member is disposed in contact with or close to the outer circumferential side of the outer race. Oil or grease is injected into a gap between the elastic member and the outer race. Through holding the outer race against the elastic member, the elastic member is deformed to suppress vibration. Furthermore, through injecting oil or grease into the gap, the damping effect can be further improved.

The invention relates to a method and a device for controlling the vibration in an automobile hierarchical modeling manner. The method comprises the following steps: sending the data of eight vertical and lateral road roughness sensors to a CPU processor, integrating the hierarchical modeling algorithm and obtaining the motion state of the centroid of suspended mass, the constrained force of suspended mass, and acceleration predictive values obtained by predicting and decoupling the vertical and lateral acceleration variable quantities of No.1 to No.4 suspension brackets, through the operation; respectively transmitting to eight vertical and lateral matrix control quantity operation module of No.1 to No.4 units; obtaining theoretical quantity of controllable actuators of No.1 to No.4 units after the synthesis is conducted; conducting the conversion operation of actuating quantity because the data received by each actuator generates the corresponding action. The invention has the advantages that the hierarchical control architecture built on the basis of considering the common influence of the vertical excitation and the lateral excitation of the road is converted into eight four-multiplied-four matrix, so as to simultaneously conduct the control quantity operation of four controllable actuators and the vibration control, thereby reducing online operation time and reaching the optimum vibration control effect of the whole automobile.

A self-adapting vibration reduction method and a magnetic rheology damper which has integration relative velocity conversion function. The damper is made up of cylinder body, magnetic rheology liquid, exciting coil on the piston head, induction coil in the piston rod, accumulator, and dirt shroud, and so on; the exciting coil and the induction coil are constituted a active magnetoelectricity type relative velocity transducer, it integrates the magnetic rheology damper structure to a unit. Its vibration reduction method is that exciting coil is loaded a medium-low frequency voltage sign as the transducer's exciting coil detection signal, common frequency alternating magnetic field which is produced by the method is formed to a closure work magnetic loop in the damper structure; axial direction relative motion between the piston of magnetic rheology damper and cylinder body make magnetic linkage of the induction coil occur to correspond change and induced obtain conversion output signal which reflects the axial direction relative motion; according to the conversion signal, controller self-adapting adjusts the drive current which is overlap on the exciting coil by current drive to control the magnetic field strength of the exciting coil to realize the self-adapting vibration reduction of the magnetic rheology.

The invention provides a compound type omni-directional tuning and shock-absorption damping pendulum and belongs to the technical field of shock resistance and absorption of structural engineering. The compound type omni-directional tuning and shock-absorption damping pendulum comprises a shock insulation spring upper portion steel plate, a shock insulation spring, a shock insulation spring lower portion steel plate, a rigid hanging rod, a damping pendulum box body, a mass block, damping particles, a vertical steel partition plate, a damping hole, a damping hole plate, a transverse steel partition plate, a pendulum hinge and tuning liquid. All of members and the mass block inside the damping pendulum box body serve as horizontal direction turning mass to perform shock absorption and energy dissipation. All of member under a vertical shock-absorption spring serve as vertical direction, swing direction and reversing direction turning mass to perform shock absorption and energy dissipation, and accordingly shock absorption and energy dissipation functions of the damping pendulum in all directions are finally achieved. The damping pendulum has the advantages of having a multi-dimensional shock-absorption function, simple in manufacture, flexible and convenient to arrange and the like.

The invention relates to a tuned mass damper for controlling tri-dimensional translation and horizontal torsion of a building structure and a manufacturing method thereof, belonging to the technical field of structural engineering seismic resistance and shock absorption. The damper comprises two tuned mass blocks which move along the two horizontal axis directions of the building structure, horizontal viscous dampers connected with the tuned mass blocks, universal rolling spherical hinges arranged at the bottom of the tuned mass blocks, limit baffles connected with the horizontal viscous dampers, horizontal clapboards, torsion mass blocks, torsional levers, torsion shafts, torsion fixed shafts, torsional damper springs and vertical viscous dampers arranged at the bottom of the horizontal clapboards. The tuned mass damper for controlling tri-dimensional translation and horizontal torsion of a building structure can perform tuned energy dissipation shock absorption in the two horizontal directions, vertical direction and horizontal torsional direction of the building structure.

The invention relates to a drum-type omni-directional turned mass damper, belonging to the technical field of vibration resistance and absorption in structural engineering, and comprising a top cover, an outer-wall sleeve connected with the top cover, a sleeve-type structure arranged inside the outer-wall sleeve, an internal horizontal baffle and an external horizontal baffle. The sleeve-type structure comprises an inner-ring core cylinder, an outer-ring core cylinder, a steel ball holder and a steel ball, wherein the inner-ring core cylinder is arranged in the outer-ring core cylinder, the outer surface of the inner-ring core cylinder is fixed with the steel ball holder that is internally equipped with the steel ball. A viscous damper is connected between the outer-ring core cylinder andthe outer-wall sleeve, the lower end faces of the inner-ring core cylinder and the outer-ring core cylinder are both connected with the internal horizontal baffle via a universal rolling spherical hinge, and a spring is connected between the internal horizontal baffle and the external horizontal baffle which is further fixedly connected with a substructure. The damper can be operable for turning energy consumption and vibration damping in all directions of the structure, namely, two horizontal directions, vertical direction, and two directions of reversing and swinging.

The invention discloses a mass particle-tuning type round-bottom all-direction quake damper and belongs to the technical field of quake resistance and damping of structural engineering. The mass particle-tuning type round-bottom all-direction quake damper comprises a particle damping box, damping particles, limit springs, vertical isolation springs, a viscous-elastic material, a steel-mixed support, a first spherical steel plate, a second spherical steel plate, wheels and retaining plates. The particle damping box and the damping particles above the wheels in the damper are used for horizontal tuning to damp and dissipate energy. All parts above the vertical isolation springs are used as vertical and swing-direction mass tuning to damp and dissipate energy, and the viscous-elastic material, the lead and steel mixed support and the arc-shaped steel plates form a rotating system which can be used as torsion-direction mass tuning to damp and dissipate energy. Accordingly, damping and energy dissipation can be realized by the damper in all directions. The damper has the advantages of multi-dimensional quake damping, simplicity in manufacturing, convenience and flexibility in arrangement and the like. Under the action of earthquake, the damper can realize energy dissipation and damping in various horizontal, vertical and horizontal torsion directions.

The invention relates to a kind of automobile suspension shock absorber with self sensing function of relative speed . It consists of cylinder block and the liquid in it , dust cap , piston head , piston rod , the magnet exciting coil on the piston head , the induction coil in the piston rod , etc . When load alternating voltage signal in middle frequency to the magnet exciting coil , it will produce same-frequency alternating magnetic field which will form a closed magnetic circuit in the shock absorber and make the induction coil produce a alternating voltage signal in the same frequency . The shock of the automobile will induce the corresponding linear change to the magnetic linkage of induction coil , the voltage signal produced in the two end of the coil will be a double sidebands amplitude-modulated signal among which the range adjusting signal reflects relative speed between automobile body and automobile bridge , thus realize the sensing of the relative speed between the automobile body and automobile bridge , thus make the shock absorber not only get the damping function but also get the self sensing function of relative speed , and further realize the self-adapting damp shock reducing of the automobile suspension system .

The invention relates to a vibration control damper of a multifunctional expandable module, comprising a fixed hanging beam, a rigid connection frame, a mass block, a hanging rope and a multifunctional damping base. The suspension rope is connected to the bottom of the rigid connection frame, the mass block is located inside the space area enclosed by the rigid connection frame, and the top of the rigid connection frame is connected to the bottom of the mass block through the suspension rope. The multifunctional damping base includes a drive mechanism and a guide rail plate , the guide rail plate is connected with the bottom of the mass block, and the driving mechanism is connected with the guide rail plate and drives the guide rail plate to drive the mass block to move back and forth. The rigid connection frame of the vibration control damper shares a mass block with the multifunctional damping base, which reduces the vertical space occupied by the vibration control damper. The rigid connection frame and the mass block form the upper multi-pendulum vibration controller, and the multi-functional damping base and the mass block form the lower multi-functional vibration controller. The combination of the two can adapt to various high-rise building environments and improve the vibration control effect and reliability.

The invention discloses a helicopter structural response active control system employing a piezoelectric stack actuator, and relates to the technical field of helicopter vibration control. The system comprises a helicopter body structure, a computer, a digital signal generator, a D / A converter, a low pass filter, a power amplifier, an oscillator, a piezoelectric stack actuator, a signal conditioner, an ICP acceleration sensor and a DSP embedded controller. The computer and the helicopter airframe structure input / output circuit. The computer outputs a vibration signal to act on the airframe structure, so that vibration acceleration signals produced by the airframe return to the computer; and then the computer outputs a control signal to control the airframe vibration, so as to play the role of helicopter vibration control. The helicopter vibration control system provided by the invention has advantages of light additional weight of the actuator, wide frequency band, high response speed, strong aligning control ability and good control effect.

The invention discloses a suspension type composite tuning vibration reduction device and method, which belong to the field of vibration reduction technology. A mass ball is installed at the end of the suspension mechanism; a plurality of energy dissipation units arranged at intervals along the circumference of the suspension mechanism are fixed on the frame body; The mechanism is connected to the suspension mechanism through a traction cable, and when the suspension mechanism swings, it can drive the stirring mechanism to stir the magnetorheological fluid filled in the damping chamber. The invention can reduce the vibration response of the transmission tower structure in all directions under the action of external force, so as to achieve the purpose of energy consumption and vibration reduction; and can adjust the natural vibration period of the mass pendulum.

The invention relates to a built-in micro-particle type tuning and friction energy dissipation damper, belonging to the field of structural engineering earthquake proofing and damping and wind resistance technology, and comprising that: a box body connected with a building structure floor member or a beam column member, damping particles placed in the box body, an internal clapboard and a connecting member of the box body; the damping particles are evenly stacked in a space formed by the box body, the internal clapboard and the connecting member in appropriate volume according to actual conditions; under the action of wind or earthquake, the whole box body can tune the natural vibration characteristic of the structure, and multidimensional vibration, friction and collision can fully occurbetween each damping particle as well as between the damping particles and the internal clapboard. The built-in micro-particle type tuning and friction energy dissipation damper of the invention has simple construction, convenient installation and adjustment, agile reaction and functions of multidimensional tuning damping and friction and collision damping, and can effectively reduce the reactionof the original structure under the dynamic action of wind or / and earthquake and the destructiveness of the original structure.