1624 results about "Vibration control" patented technology

The present teachings generally include flexible pickleball paddles and / or frames thereof. In an aspect, a frame of a paddle includes a region adjacent to a throat portion of the paddle that is thinner than other regions of the frame, e.g., thicker regions disposed along its sides, top, and / or handle. The lack of material in this portion of the frame—e.g., disposed directly above the handle—may provide advantageous flexing of the paddle during play (e.g., how fast the paddle can return to the original shape after being flexed), improving power characteristics, control, feel, responsiveness, and / or the like. Moreover, a gap formed by the lack of material in this portion of the frame can provide a region for enhanced weight control (e.g., by filling the gap with a weighted material), and / or for enhanced sound or vibration control (e.g., by filling the gap with a sound dampening and / or vibration dampening material).

The invention discloses a soil resistance perception-based multi-mode adaptive subsoiling mechanism, which comprises an integral rack, a subsoiling monomer, a control system and an energy device, the subsoiling monomer detects soil resistance in real time through a sensor assembly and transmits the soil resistance to the control system, and the control system controls the subsoiling monomer according to the magnitude and change characteristics of the soil resistance. The subsoiler is automatically switched among three modes of traditional rigid connection subsoiling, self-excited vibration subsoiling and forced vibration subsoiling; when the soil resistance is smaller than a first preset threshold value, a rigid connection mode is adopted; when the resistance is between a first preset threshold value and a second preset threshold value, a self-excitation vibration mode is started; and when the resistance is greater than a second preset threshold value, the vibration motor is started to realize forced vibration. The control system not only monitors the resistance absolute value, but also analyzes the time characteristic to realize intelligent threshold adjustment. The problems that a traditional subsoiling mechanism is high in energy consumption and poor in adaptability are solved, and the intelligent subsoiling mechanism has the advantages of intelligent operation mode switching, optimized energy utilization, adjustable vibration parameters and the like.

The invention relates to an optimization design method for a multi-fulcrum elastic ring supporting structure of an aero-engine rotor system, and belongs to the technical field of aero-engine vibration control and rotor dynamics simulation. Firstly, a finite element or lumped unit model is adopted to establish a coupling kinetic equation of a rotor and an elastic ring, and fluid-solid coupling factors such as inner and outer oil films of the elastic ring and orifice flow are considered; then, through critical rotating speed and vibration harmonic response analysis, sensitivity evaluation is carried out on rigidity and damping characteristics of different supporting positions, and target vibration reduction modes corresponding to all fulcrums are identified; then, coupling simulation and multi-objective optimization are carried out around the number of bosses of the elastic ring, the height of the bosses, the damping aperture, the thickness of a thin wall and other key structure parameters, and the optimal design meeting the vibration reduction requirement of a rotor system and the strength reliability requirement of the elastic ring is obtained through iteration; and finally, an optimization result is applied to structure manufacturing and assembling. The method can effectively reduce the vibration amplitude of the rotor when the rotor crosses the multi-order critical rotating speed.

The invention relates to the technical field of vibration control, and discloses a quasi-zero stiffness vibration isolator imitating an insect jumping foot structure, which comprises a base and a bearing table between which a vertical spring is arranged, the two sets of connecting rod mechanisms are arranged between the base and the bearing table, each set of connecting rod mechanism comprises two lower connecting rods, two upper connecting rods and two middle connecting rods, the two lower connecting rods are hinged to the top face of the base, the two upper connecting rods are hinged to the bottom face of the bearing table, and the two middle connecting rods are distributed in an X shape; two ends of the two middle connecting rods are respectively hinged with the lower connecting rod and the upper connecting rod; the transverse springs are arranged at the hinged positions of the two lower connecting rods and the two middle connecting rods and the hinged positions of the two upper connecting rods and the two middle connecting rods correspondingly. The vibration isolator is simple in structure, small in transverse size, convenient to assemble and disassemble and easy to adjust, quasi-zero-stiffness vibration isolation is achieved through the special mechanical property of the overall structure, vibration energy can be efficiently absorbed, and the vibration isolator has wide application prospects in the field of low-frequency vibration control.

The invention relates to the technical field of vibration test, and discloses a micro-seismic environment simulation vibration test board and a test method thereof, which realize high-fidelity simulation of multiple types of micro-seismic scenes through a multi-source composite signal generation and waveform reconstruction technology. The dynamic adjustment capability of the control strategy is improved by using disturbance compensation and an adaptive control mechanism, real-time analysis and early warning feedback are performed on the response state in the test process based on the vibration characteristic evaluation result, and an auxiliary decision basis is provided for the vibration control strategy. Besides, a hierarchical closed-loop regulation and control mechanism is logically formed based on local output regulation among multiple axes and a global control strategy, and closed-loop linkage of the control strategy, execution response, state evaluation and control correction is realized, so that the overall regulation and control precision, response sensitivity and test precision are remarkably improved; accurate simulation and stable control of a three-dimensional vibration field are realized.

The present teachings generally include flexible pickleball paddles and / or frames thereof. In an aspect, a frame of a paddle includes a region adjacent to a throat portion of the paddle that is thinner than other regions of the frame, e.g., thicker regions disposed along its sides, top, and / or handle. The lack of material in this portion of the frame — e.g.. disposed directly above the handle — may provide advantageous flexing of the paddle during play (e.g., how fast the paddle can return to the original shape after being flexed), improving power characteristics, control, feel, responsiveness, and / or the like. Moreover, a gap formed by the lack of material in this portion of the frame can provide a region for enhanced weight control (e.g., by filling the gap with a weighted material), and / or for enhanced sound or vibration control (e.g., by filling the gap with a sound dampening and / or vibration dampening material).

The invention relates to a noise damping control system of an offshore wind turbine generator, and belongs to the technical field of offshore wind power generation. The coupling state evaluation module is used for determining a coupling state evaluation index through a preset deep neural network model based on the platform motion information, the vibration spectrum data and the sound pressure signal; the cooperative control strategy generation module is used for determining target rigidity and target damping according to the coupling state evaluation index and the vibration spectrum data; according to the invention, the coupling state evaluation module processes platform motion information, vibration spectrum data and sound pressure signals acquired by the data acquisition module through a preset deep neural network model; the preset model is endowed with strong nonlinear fitting capability through offline supervised learning of massive historical working condition data; and an accurate and quantitative risk basis which cannot be reached by the prior art is provided for subsequent control decisions.

The invention discloses a numerical control machine tool vibration suppression self-adaptive control system and method, and relates to the technical field of intelligent vibration control, and the method comprises the steps: building a current-modal dynamic mapping relation between an electrical drive characteristic and a mechanical structure modal response based on a vibration state feature vector; real-time machine tool modal state vectors are obtained through online recursive estimation; the machine tool modal state vector is used as a boundary condition to be injected into the virtual prediction model; solving to obtain an optimal control parameter sequence and a corresponding vibration prediction result in a future time domain by taking multi-performance index collaborative optimization as a target through a rolling optimization control strategy; translating the control parameter sequence into a specific execution instruction and issuing the specific execution instruction; monitoring an execution process in real time and recording actual response data; according to the method, the accuracy of vibration prediction and the real-time performance of control response are improved by establishing the dynamic mapping relation from the electromagnetic driving characteristics of the servo main shaft and the feed motor to the dynamic response of the machine tool structure.

The present invention belongs to the technical field of wind-induced vibration control of bridges, and provides a one-way friction energy dissipation device for controlling the flutter of large-span bridges. The device is quickly installed before the arrival of extremely strong winds, which can temporarily and significantly improve the flutter safety of the bridge, reduce its own wind-resistant design requirements, and significantly reduce the project cost. After the strong wind, it can be easily disassembled without affecting the beauty of the bridge or interfering with navigation under the bridge. The use of one-way bearings greatly reduces the weight, transportation, loading and unloading, and storage costs of the counterweight. The device can adapt to any static wind displacement, has good robustness, is safe and reliable, economical, fast, efficient and practical, and can be shared by multiple bridges at different times, greatly reducing its own and storage costs. The device can also be used for long-term vibration control of large marine structures such as floating offshore platforms, floating wind turbines, and temporarily docked ships under the combined action of wind and waves, and wind vibration control of gentle photovoltaic structures.

The invention provides an inclined variable-angle aircraft interstage separation ground test device. The inclined variable-angle aircraft interstage separation ground test device comprises an aircraft separation device, an angle adjusting device, a temperature control and acquisition device, a vibration control and impact acquisition device, an ignition control device and a device base. The angle adjusting device comprises a device side plate, an arc groove, an angle ruler, a separation mechanism mounting plate, a supporting hinge, a supporting rod, an adjusting sliding rail, an adjusting base, a locking device, a device base gradienter, a rotating bearing and an auxiliary fixing block. The temperature control device comprises a quartz lamp array heating cage, an outer wall temperature control thermocouple and an inner wall temperature acquisition thermocouple, and can simulate a pneumatic heating environment at a separation moment, so that the thermal deformation matching capability of the separation mechanism in a high-temperature environment and the operation reliability of the separation mechanism are obtained. The vibration control and impact acquisition device is composed of a vibration table, a vibration control sensor and an impact sensor.

The invention discloses an intelligent controllable road bridge vibration detection method based on magnetorheological fluid and a damping device, and belongs to the technical field of bridge engineering structure health monitoring and vibration control, and the method comprises the steps: calculating a comprehensive vibration strength index through multi-source signal fusion and adaptive Kalman filtering, and estimating the bridge speed; the damping force is mapped through the pre-calibration database, and a damper state verification mechanism is introduced; a gain self-adaptive ceiling algorithm is combined with a fuzzy PID control force algorithm for tracking to realize accurate control; finally, the health state of the system is evaluated through performance degradation indexes of temperature compensation, corresponding devices are integrated with a sensing network, a control unit and a distributed acquisition architecture, and the problems that a traditional system is single in state sensing, fixed in control strategy, lack of a self-diagnosis function, complex in engineering wiring and the like are solved. The comprehensive solution integrating intelligent monitoring, self-adaptive control and health self-diagnosis is realized, and the reliability, adaptability and maintainability of the bridge damping system are remarkably improved.

The invention discloses a roadbed compactness laser radar point cloud evaluation system and method, and belongs to the technical field of intelligent construction of road engineering. The system comprises a laser radar point cloud acquisition module, a self-adaptive multi-scale octree space segmentation module, a differential geometric feature extraction module, a compaction degree field construction module, a compaction degree visualization module and a vibration control module. Differential geometric features are extracted, multi-scale features are fused to construct a compaction degree field, a color coded contour line image is generated, and finally a vibration path is planned and vibration parameters of the road roller are controlled. According to the system, through laser radar point cloud analysis, accurate evaluation and intelligent control of the roadbed compaction degree are achieved, the defects that a traditional compaction method depends on artificial experience, real-time evaluation cannot be achieved, compaction is uneven and the like are overcome, the roadbed compaction quality and construction efficiency are remarkably improved, and the system has important engineering application value.

The invention provides a semi-active suspension vibration control method and system based on preview fusion and game decision, and the method comprises the following steps: obtaining pavement preview information through a forward sensor, carrying out the signal processing, and generating a future pavement preview sequence in real time; establishing a two-degree-of-freedom 1 / 4 whole vehicle vertical dynamical model; under a model prediction control framework, participants of a non-cooperative Nash game model are defined, a corresponding cost function is designed, a damping coefficient is discretized by adopting mixed integer programming, Nash equilibrium is solved by adopting a branch and bound method, and an optimal damping coefficient is obtained; mapping the optimal damping coefficient into optimal damping force meeting constraint conditions; hysteresis force compensation is conducted through a hysteresis model, and target control current is obtained through damping force obtained after hysteresis compensation according to the mapping relation between the damping force of the magnetorheological damper and the control current; and outputting the target damping force according to the instruction of the target control current. According to the invention, autonomous balance adjustment of multiple control targets is realized.

The invention provides a vibration control method and electronic equipment, and relates to the technical field of terminals. The motor vibration parameter can be obtained by integrating the use state and the electric quantity information of the electronic equipment, self-adaptive adjustment of the vibration parameter is achieved, and the use experience of a user is improved. The method is applied to the folding screen electronic equipment and comprises the following steps: acquiring a use state of the electronic equipment; acquiring electric quantity information of the electronic equipment; and acquiring vibration parameters according to the use state and the electric quantity information. And driving the motor to vibrate according to the vibration parameters.

The invention relates to a stroke-sectioned adjustable variable-damping inflatable hydraulic multi-damping device, and belongs to the technical field of vibration control. Comprising a roll shaft support assembly, a working cylinder assembly, a spring damping assembly and a piston mechanism assembly. The working cylinder assembly is mainly composed of a connecting pull ring, a main liquid storage cylinder, a limiting device, tightness adjusting threads, a piston rod connecting position, an auxiliary liquid storage cylinder and an air storage cylinder. The spring damping assembly is mainly composed of an adjusting spinning roller, a damping spring, a spinning roller damping gasket and a spring damping gasket. The piston mechanism assembly is composed of a piston rod and driving pistons on the two sides. The roller shaft support assembly is composed of a roller shaft fixing support and a pin. Through mechanism linkage of the liquid storage cylinder and the air storage cylinder, the inflatable hydraulic damping device is formed, and the purposes of damping changing and vibration reduction are achieved. The shock resistance and the transmission efficiency of a vibration reduction system can be improved, the energy consumption effect, the structural rigidity and the stability are enhanced, and the advantages of being simple in structure, convenient to implement and the like are achieved.

The invention discloses a vibration control method for an offshore wind turbine structure, which comprises the following steps of: a, implementing real-time multi-source data acquisition which is realized by deploying a series of sensors on the offshore wind turbine structure and in the surrounding environment so as to obtain environmental load parameters, structural response parameters and running state parameters of the offshore wind turbine; and b, inputting the acquired data into a composite environment and structure state decoupling and feature extraction module, preprocessing the acquired data by the module, and identifying an environment load spectrum in real time. According to the vibration control method for the offshore wind turbine structure, through multi-source information fusion, online system identification and self-adaptive multi-target control, broadband, multi-mode and self-adaptive suppression of vibration of the offshore wind turbine structure is achieved, and the limitation of a traditional fixed parameter damper in a complex dynamic marine environment is overcome; complex excitation sources such as wind, waves and ocean currents and the coupling effect of the excitation sources are effectively handled.

The invention discloses an automobile semi-active suspension PID parameter adaptive adjustment and vibration control method and system based on reinforcement learning, and the method mainly comprises the following working steps: 1, constructing a reinforcement learning environment comprising a suspension dynamics high-fidelity simulation model and a PID controller; 2, defining a state space including a vehicle body vertical acceleration error e (t), an error integral term summa e (t) dt, an error differential term de (t) / dt, a suspension dynamic stroke zdef (t), a driving vehicle speed v (t) and road surface unevenness estimation xi (t); and 3, defining an action space including a proportion coefficient increment delta Kp, an integral coefficient increment delta Ki, a differential coefficient increment delta Kd and an output compensation amount delta e (t) of the PID controller. According to the method, the problem that the suspension performance is reduced due to the fact that control parameters of a traditional PID control method are fixed under the non-linear and time-varying working conditions is solved, and the riding comfort and the handling stability of the vehicle are remarkably improved.

The invention belongs to the technical field of low-frequency vibration control, and provides a low-frequency tuned mass damping device for reversely stretching a compression spring in order to solve the problem that a traditional tuned mass damper is limited in use of a vertical space due to too large net deformation of the spring under the low-frequency condition. According to the device, large compression deformation and reverse tensile deformation of the spring are fully realized in a limited vertical space in a manner of performing super-compression-reverse tensile treatment on the compression spring, relatively low rigidity required by a vibration system is achieved, low-frequency tuning can be realized in the limited vertical space of a bridge girder, and the rigidity of the vibration system is improved. The frequency application range of the tuned mass device is greatly expanded; and meanwhile, the problems that the stability problem is caused when a traditional compression spring mass body is arranged on the spring and the damping is too high and unstable due to the fact that a guide component is added are solved. The device is simple in structure, low in damping, low in space requirement and good in stability, and can be applied to vertical, lateral and torsional multi-type low-frequency vibration control of various engineering structures.

The invention relates to a self-adaptive force output and energy consumption bridge vibration and vibration control inerter tuning device, and belongs to the technical field of vibration control. Comprising a roll shaft support, a spring rod, a main inerter element, a box chamber main body, a secondary inertia flywheel, a flow guide pipe, a transmission connecting rod and a flow baffle, the main inerter element penetrates through and is arranged in the box chamber main body, the outer end of the main inerter element is connected with the spring rod, the spring rod is connected with the roll shaft support, and the roll shaft support is respectively fixed with the bottom surface of a main beam and the top of a bridge pier; in addition, the flow guide pipe is arranged in the box chamber body, a flow baffle and a transmission connecting rod are further arranged in the flow guide pipe, and the transmission connecting rod is further connected with a secondary inertia flywheel. The damping device is achieved through a hydraulic mechanism, and the damping device with the self-adaptive inerter coefficient is formed through linkage of the inerter devices in the main box chamber and the auxiliary box chamber, so that the purposes of changing the inerter coefficient in real time and damping are achieved. The shock resistance, the transmission efficiency, the energy consumption effect, the structural rigidity and the stability of a vibration reduction system can be improved.

The invention provides a tunnel blasting vibration reduction method and system based on asymmetric slotting, relates to the technical field of geotechnical engineering numerical simulation, and provides an integrated intelligent blasting vibration reduction system of asymmetric slotting structure optimization-quantum genetic algorithm collaborative optimization-model dynamic regulation. Triple fusion of a physical mechanism, a mathematical algorithm and an information technology of proximity tunnel blasting vibration control is creatively achieved, the bottleneck that a traditional method depends on experience trial and error, model static lag and vibration control and construction efficiency are difficult to consider at the same time is broken through, vibration speed control precision is improved, tunneling efficiency is improved, and meanwhile the construction efficiency is improved. The dynamic adaptability to complex geological conditions is remarkably enhanced, and a new generation of integrated solution is provided for safe, efficient and intelligent construction of the adjacent tunnel.

The invention provides a tendon-driven mechanical arm flexible vibration control method based on a hybrid optimization strategy. The tendon-driven mechanical arm flexible vibration control method comprises the steps that a dynamic model of a tendon-driven mechanical arm is established; constructing a trajectory optimization model for suppressing residual vibration; solving the trajectory optimization model for suppressing residual vibration by using a hybrid particle swarm optimization strategy, and obtaining an expected trajectory; and designing a sliding mode controller based on an RBF neural network to actively track the trajectory so as to suppress residual vibration. According to the invention, a hybrid particle swarm optimization algorithm is adopted to optimize a motion trajectory, so that residual vibration is reduced, an expected trajectory for trajectory tracking is obtained, active control is combined to further suppress the residual vibration, and the tail end vibration amplitude is reduced by more than 50%; the self-adaptive neural network all-drive system control method is designed by combining the RBF neural network, so that the tail end vibration is further inhibited while the mechanical arm completes trajectory tracking, and the tracking error is smaller than 0.5 degree.

Disclosed in the present application is a plate-shaped structure with vibration damping and limiting functions. The plate-shaped structure comprises an upper plate, a lower plate, phononic crystal vibration-damping cell elements, diagonally tensioned friction-damping cell elements and C-type limiting cell elements, wherein the phononic crystal vibration-damping cell elements and the diagonally tensioned friction-damping cell elements are disposed between the upper plate and the lower plate and are periodically arranged at intervals; and the C-type limiting cell elements are distributed at four corners of the plate-shaped structure. The present application has an ingenious design, and arranging the phononic crystal vibration-damping cell elements and the diagonally tensioned friction-damping cell elements between the upper plate and the lower plate to form a periodically arranged array, and arranging the C-shaped limiting cell elements at the four corners of the plate-shaped structure greatly reduce the mounting space for an electronic device and a vibration control apparatus, and solve the current problems of vibration isolators for electronic devices, i.e., poor vibration-damping and impact-resistant effects and a large displacement during operation.

The invention belongs to the technical field of vibration control, and provides a fluid-structure interaction numerical calculation method for controlling flutter of a large-span bridge by a submerged heaving plate, which is based on computational fluid dynamics software Fluent, utilizes a dynamic grid technology, compiles a UDF secondary development program and embeds the UDF secondary development program into a solver for calculation. The method comprises the following steps: establishing a motion control equation of a rigid main beam-sling-underwater heaving plate coupling system in a wind field, embedding a system motion solving process into Fluent software by utilizing a user-defined function, and realizing system fluid-solid coupling solving by adopting a mode of alternately solving a rigid main beam and a wind field computational domain and simultaneously solving a heaving plate and a water body computational domain. And vertical and torsional motion responses of the controlled main beam are obtained. Compared with a physical experiment, rich information such as movement time history data of the main beam, the heaving plate and a nearby flow field under the condition of various sizes can be conveniently and safely obtained, vibration suppression mechanism analysis can be conveniently carried out, and the research difficulty, cost and risk are greatly reduced.

The invention provides a blasting vibration monitoring and influence range prediction method for a long and large tunnel in an environment sensitive area, and relates to the technical field of blasting safety monitoring and vibration control in tunnel engineering, and the method comprises the steps: constructing a three-dimensional dynamic monitoring network, collecting multi-source data based on the three-dimensional dynamic monitoring network, carrying out the preprocessing of the multi-source data, obtaining a blasting vibration feature matrix, and carrying out the prediction of the influence range. Building a prediction model based on the improved LSTM model, training the prediction model based on a preset blasting vibration characteristic matrix and blasting parameters and geological conditions corresponding to the preset blasting vibration characteristic matrix to obtain a trained prediction model, and inputting a to-be-detected blasting vibration characteristic matrix and blasting parameters and geological conditions corresponding to the to-be-detected blasting vibration characteristic matrix into the trained prediction model. And obtaining a prediction result. According to the method, the precision and the real-time performance of blasting vibration monitoring and prediction are remarkably improved, the vibration control problem in blasting construction of the long and large tunnel in the environment sensitive area is effectively solved, the prediction precision is high, the real-time performance is high, the adaptability is high, and the data utilization efficiency is high.

The invention belongs to the technical field of aerial cable deicing and discloses a vibration-based aerial cable deicing robot and a control method. The robot comprises an integral mechanical frame, a driving module, a balancing module and a vibration deicing module. The overall mechanical frame is designed by adopting light-weight aluminum profiles, and double-layer carbon fiber plates are arranged in the overall mechanical frame and used for installing all assemblies. The driving module stably walks through a worm and gear mechanism; the balance module adopts a Y-shaped guide groove and a balancing weight to ensure the stability of high-altitude operation; the vibration deicing module directly clamps a cable through a flexible mechanical clamping jaw, and an ice layer is broken through high-frequency vibration. The control method comprises the tasks of vibration control, walking driving, clamping jaw adjustment and the like, and automatic control is achieved through the STM main control chip. High-frequency vibration and amplitude optimization design are adopted, and a flexible clamping jaw structure is matched, so that the deicing effect is ensured, and cable damage is avoided. And the safety and the efficiency of the deicing operation of the overhead cable are obviously improved.

The invention discloses a disturbance observation driven minimum control synthesis adaptive vibration control method and system. The method comprises the following steps: establishing a nominal model of a structure based on a vibration response signal of the structure; carrying out fusion processing on the nominal model of the structure and the vibration response signal, constructing a disturbance observation framework, estimating various disturbances borne by the structure in real time, and generating a disturbance estimation value; combining the disturbance estimation value with a control law of a minimum control synthesis algorithm in a feedforward compensation mode to construct a driving control instruction; and generating an acting force according to the driving control instruction to adjust the vibration of the structure. According to the method, a cooperative control architecture with strong anti-interference capability is constructed by fusing a disturbance observation technology and a minimum control synthesis algorithm, and disturbance and uncertainty are effectively suppressed while vibration is controlled, so that the vibration control precision is improved.

The utility model provides a local resonance type phononic crystal primitive cell which comprises a silicon rubber base body serving as an outer ring, a steel scatterer is arranged in an inner cavity of the silicon rubber base body, and the steel scatterer and the silicon rubber base body are connected and fixed through a soft material wrapping layer. The four spring mass subsystems are nested in the steel scattering body; a soft material wrapping layer is arranged on the side wall of the inner cavity of the silicone rubber base body. According to the utility model, a plurality of complete and directional band gaps in a low-frequency range can be effectively formed, and low-frequency elastic waves are effectively inhibited; the hollow and height difference design is adopted among the external silicon rubber base body, the steel scatterer and the spring mass subsystem, so that the vibration damping material has a sufficient deformation space to play a vibration damping role; the steel scatterer, the spring mass subsystem and other structures ensure that the anti-vibration pad has an enough supporting effect, band gap regulation and control of the local resonance type photonic crystal can be effectively achieved through material selection flexibility, and low-frequency vibration control of different frequency bands is achieved.

A sound generation apparatus comprises a transducer, a driving apparatus, and a control circuit. The driving apparatus is connected to the transducer. The control circuit is electrically connected to the transducer and the driving apparatus. The control circuit is configured to drive a vibration member of the transducer to vibrate, and the control circuit is further configured to control the driving apparatus to drive the transducer to perform periodic motion. The transducer is disposed to emit a first sound wave to the outside while performing periodic motion.

An inerter synergistic particle damper pipeline supporting system capable of achieving multi-stage vibration reduction comprises a pipeline, a pipeline support, a universal joint assembly, an outer cavity assembly, a liquid inerter synergistic unit, a particle damper assembly, a rotary particle energy consumption unit, a transmission linkage mechanism and a plurality of tuning springs. According to the system, multi-dimensional vibration of a pipeline is transmitted to a transmission linkage mechanism through a pipeline support and a universal joint assembly, and multi-stage dissipation and absorption of vibration energy are achieved by combining the synergistic effect of a liquid inerter synergistic unit, a particle damper assembly and a rotary particle energy dissipation unit; the system starts different control modes under the action of small-amplitude vibration, large vibration and extreme vibration, efficient vibration control and energy consumption effects are achieved through a three-level response mode, and automatic reset is achieved after external excitation is finished. By means of the synergistic effect of inerter synergy and particle collision energy consumption, efficient control over vibration of the pipe type structure is achieved, the stability of the pipe type structure is improved, and the service life of the pipe type structure is prolonged.

The utility model belongs to the technical field of glass fiber wire drawing machines, and particularly relates to a wire drawing machine head with an inward taper, which can automatically adjust and avoid a wire drawing resonance area on line. The device comprises a machine head main shaft, a bearing seat, a front seat, a rear seat, a front taper sleeve, a rear taper sleeve and a vibration reduction component, the front taper sleeve and the rear taper sleeve are both arranged on the bearing seat, and the conical surfaces are matched with the front conical part and the rear conical part respectively; the front seat is arranged on the bearing seat, and a front sealing cavity is formed between the front seat and the front taper sleeve; the rear seat is arranged on the bearing seat, and a rear sealing cavity is formed between the rear seat and the rear taper sleeve; the front and rear sealing cavities are respectively provided with front and rear inflation ports. PLC control can be fed back through machine head vibration real-time detection, proportional valve PID adjustment is adopted, online real-time data collection and exchange are achieved, a soft supporting vibration reduction device on a bearing seat is controlled, and vibration is controlled within an acceptable range.