14results about How to "Improved vibration suppression effect" patented technology

The invention provides an inhaul cable vibration control device and a vibration control method. The device comprises a speed type damping unit and a tuned mass damping unit, the speed type damping unit and the tuned mass damping unit are arranged close to the cable beam anchoring end of the inhaul cable, the speed type damping unit comprises two speed type dampers, and the two speed type dampers are symmetrically arranged on the two sides of the cable face of the inhaul cable; the two ends of the speed type damper are connected with the inhaul cable and the ground respectively. The method comprises the following steps: determining the relative arrangement positions of a speed type damping unit and a tuned mass damping unit on the inhaul cable according to the determined broadband vibration order and narrow-band vibration order of the inhaul cable; and configuration parameters of the speed type damping unit and the tuned mass damping unit are determined, the inhaul cable is configured according to the determined damping coefficient of the speed type damper and the cable direction installation positions of the speed type damping unit and the tuned mass damping unit, and vibration control is achieved through the configured inhaul cable. The method has the advantages of guaranteeing the vibration reduction effect of the inhaul cable, being convenient to construct and the like.

The invention discloses an output feedback sliding mode prediction control method of a piezoelectric driving active and passive integrated vibration isolation system. The invention aims to solve the problems that the input and output characteristics of an actuator are neglected in the control of a vibration isolation system, the system state is not measurable, and the vibration suppression performance is influenced by mismatching disturbance, and optimization and input constraints are considered in a control algorithm. According to the method, an output feedback sliding mode predictive control algorithm based on a control guide model is designed by considering the neglected actuator input and output characteristics in an active and passive integrated vibration isolation system, the unmeasurable state of the system and the vibration suppression effect of the sliding mode predictive control algorithm which is limited by unconsidered mismatching disturbance; therefore, the suppression of the vibration signal is realized. According to the invention, the vibration suppression performance is improved, and the practical engineering application is promoted.

The invention provides a motor stator vibration suppression method and system based on an electromagnetic pad and deep learning, and relates to the field of electrical technology, and the method comprises the steps: collecting a vibration signal of a motor stator, and carrying out the preprocessing of the vibration signal; inputting the preprocessed signal into a deep learning model, and training and optimizing the deep learning model; fusing the features through a full connection layer to obtain a comprehensive feature vector; predicting the future vibration state of the motor stator by using the comprehensive feature vector; establishing an electromagnetic force model, and designing an adaptive control law based on the predicted future vibration state and the electromagnetic force model; electromagnetic force required by vibration suppression is calculated by using a self-adaptive control law and is converted into a control signal to adjust the electromagnetic pad; a multi-objective optimization algorithm is used to consider the vibration suppression effect and energy consumption at the same time, an adaptive control law is adjusted, and closed-loop feedback control is formed to continuously optimize the vibration suppression effect.

The invention provides a built-in permanent magnet synchronous motorized spindle optimization design method for a high-precision numerical control machine tool, and aims to solve the problem that a conventional motorized spindle structure cannot adjust an axial preload and a radial external load in real time. The structure of the motorized spindle is optimally designed from three aspects of high-speed ceramic ball mixed bearing materials, axial preload real-time compensation and radial external load real-time compensation. The dynamic characteristics of the rotor system can be improved, and shafting vibration can be actively inhibited.

The present invention discloses a low-vibration rotor modulation slot of a built-in integer slot motor and a design method thereof, determines the motor size parameters, performs electromagnetic modeling, simulates the air gap flux density waveform under the no-load operation condition of the motor, and solves the radial electromagnetic force; simulates the radial electromagnetic force distribution under the no-load operation condition of the motor, collects the radial electromagnetic force under the no-load operation condition; simulates the three-dimensional modal frequency of the motor, and calculates the modal frequencies of each order; based on the radial electromagnetic force and modal frequencies of each order under the no-load operation condition, simulates the vibration acceleration response of the motor under the no-load operation condition, and determines the radial electromagnetic force optimization target: constructs a tooth number order static modulation function, designs the rotor modulation slot, and when the waveforms of the actual static modulation function and the ideal static modulation function are infinitely close, the radial electromagnetic force is minimum. The method of the present invention is easy to process, has strong pertinence, and significantly improves the vibration effect of the motor.

The invention provides a robot tail end vibration suppression method and device, a medium, a controller and a product, and the method comprises the steps: respectively collecting original motion signals in a first direction and a second direction through an angular velocity sensor after a robot starts to run; respectively processing the collected original motion signals in the first direction and the second direction to obtain a first vibration frequency in the first direction and a second vibration frequency in the second direction; respectively setting corresponding notch filters according to the obtained first vibration frequency in the first direction and the second vibration frequency in the second direction; a notch filter in the first direction is added to a control instruction of a second motor of the robot, and a notch filter in the second direction is added to a control instruction of a third motor. According to the scheme, mechanical vibration generated by the flexible rigid body when the tail end of the robot moves in multiple directions under the control of the multiple motors can be restrained.

The application discloses a kind of space ring column antenna satellite distributed active cable vibration control method, it belongs to space large ring column antenna satellite control technical field.The application solves the problem of poor robustness of the existing space large ring column antenna satellite vibration control method.The application ensures that the system can accurately adjust the pretightening force of cable to respond to external disturbance through controllability analysis.Based on model predictive control technology, a distributed model predictive control strategy is designed to predict and control the vibration response at future time. An objective optimization function is established to optimize the cable pretightening force adjustment strategy in the rolling time domain, real-time response to the dynamic changes of the structure. The distributed active cable vibration control method optimizes the vibration suppression process, improves the robustness of the system, and effectively ensures the performance of the antenna and the quality of signal reception. The application can be applied to the control of space large ring column antenna satellite.

The present invention is a meta-device that realizes the multiplexing of low-frequency vibration suppression and triboelectric energy collection functions, including a base, a plane displacement device, an annular spacer, a supporting cylinder, a protective cover and a mass block, the inner side of the protective cover is connected to the central truncated cone part of the plane displacement device through the supporting cylinder, the supporting cylinder connects the plane displacement device and the protective cover, below the plane displacement device is an annular spacer with the same outer diameter as the plane displacement device, below the annular spacer is a base with the same diameter as the outer diameter of the annular spacer, and a friction nanogenerator is arranged between the base and the plane displacement device, and the friction nanogenerator includes an electronegative film and a flexible pad. The device of the present invention can realize both low-frequency vibration suppression and conversion of low-frequency vibration environmental energy into electrical energy, powering low-power electronic devices, and is compact and small in size. The small size also takes into account the protection of the device, thereby improving the reliability of the device.

The application provides an optimization design method of an internal permanent magnet synchronous electric spindle for a high-precision numerical control machine tool, and aims at the problem that a conventional electric spindle structure cannot perform real-time adjustment on axial pre-load and radial external load, and performs optimization design on the electric spindle structure from three aspects of high-speed ceramic ball hybrid bearing material, axial pre-load real-time compensation and radial external load real-time compensation. The application can improve dynamic characteristics of a rotor system and can actively inhibit shafting vibration.

This application discloses a robot motion control method, control system, medium, and product, relating to the field of robot motion control. Implementing this application, the control system constructs a digital twin model of the robot, determines the theoretical motion response data of the robot executing motor drive commands, and simultaneously collects the actual motion state data of the robot executing motor drive commands through equipment. The control system separates the actual motion state data into low-frequency motion components and high-frequency vibration components: the low-frequency motion component is used for trajectory correction, generating position compensation commands based on pose deviation; the high-frequency vibration component is used for vibration suppression, determining the stiffness coefficient through energy analysis and generating impedance adjustment commands. This dual feedback control mechanism ensures both the accuracy of the motion trajectory and the suppression of high-frequency vibrations, improving the positioning accuracy and stability of the robot during high-speed movement.

A drive unit includes an electric unit comprising: a first electric motor for driving; a reduction mechanism that transmits the rotational torque of the first electric motor to a drive wheel; a second electric motor that generates electricity by being driven by an internal combustion engine; and a speed-increasing mechanism that transmits the rotational torque of the internal combustion engine to the second electric motor. The first electric motor, the reduction mechanism, the second electric motor, and the speed-increasing mechanism are housed in a housing. Within the housing, the first electric motor and the second electric motor are arranged parallel to each other in the longitudinal direction of the vehicle body. The reduction mechanism and the speed-increasing mechanism are also arranged in the longitudinal direction of the vehicle body. The electric unit is connected to the internal combustion engine in a left-right direction of the vehicle body. The first rotating shaft, serving as the rotating shaft of the first electric motor, and the second rotating shaft, serving as the rotating shaft of the second electric motor, are located at the front and rear sides of the vehicle body in the longitudinal direction, separated by a crankshaft rotating shaft, which serves as the rotating shaft of the internal combustion engine.

The embodiment of the invention provides a vibration suppression method and device for a high-altitude operation machine and the high-altitude operation machine, and relates to the technical field of mechanical control. The method comprises the following steps: acquiring a low-dimensional motion signal of a working platform, wherein the low-dimensional motion signal is obtained by compressing an original dynamic signal based on a self-adaptive observation matrix; obtaining a sparse activation vector and determining a reconstruction signal according to the low-dimensional motion signal, the adaptive observation matrix and a pre-trained somatosensory event physical dictionary; determining a target swing frequency in a frequency spectrum corresponding to the reconstruction signal according to a preset swing frequency library so as to generate an enhancement vector reflecting the target swing frequency, generating a suppression signal according to a working platform motion parameter determined by the reconstruction signal, and generating an exploration vector according to a somatosensory event physical dictionary and a sparse activation vector; and updating the adaptive observation matrix according to the enhancement vector and the exploration vector, and sending a suppression signal to a motion control unit of the working platform. According to the method, real-time and self-adaptive vibration suppression can be realized to optimize the somatosensory.

The application discloses a kind of dry-type hollow reactor vibration suppression structures based on particle damping vibration absorption, dry-type hollow reactor includes multiple layers of winding, vibration suppression structure uses insulating material, the vibration suppression structure includes the damping particle cavity between the two layers of the winding of being arranged in adjacent, the damping particle cavity is filled with damping particle.The application also discloses a kind of dry-type hollow reactor vibration suppression structures based on particle damping vibration absorption installation method, including steps S1, damping particle is filled into the damping particle cavity, then the damping particle cavity is pumped vacuum;S2, dry-type hollow reactor assembly when damping particle cavity is pasted between the two layers of winding of adjacent;S3, after dry-type hollow reactor assembly is completed, to the damping particle cavity inflation so that damping particle cavity expands and is fixed between the two layers of winding of adjacent.The application can effectively absorb the body vibration of dry-type hollow reactor, improve the safety and stability of dry-type hollow reactor.

This invention discloses an array-type acoustic black hole ring vibrator and a broadband vibration absorption device for pipelines including the array-type acoustic black hole ring vibrator, belonging to the technical field of vibration reduction devices. The array-type acoustic black hole ring vibrator of this invention is fixed to the outside of an annular pipeline and includes several acoustic black hole structural units arranged in an array along the circumference of the annular pipeline. The distances between the outer and inner surfaces of each acoustic black hole structural unit and the radial central axis of the annular pipeline exhibit a smooth gradient change with a periodic variation, being larger at both ends and smaller at the center, forming an outer arc-shaped profile surface and an inner arc-shaped profile surface. A ring segment of constant thickness is also provided between every two acoustic black hole structural units. This invention can achieve lower frequency and wider frequency pipeline vibration suppression without changing the internal flow channel structure of the pipeline or causing any damage to the pipeline.