公开(公告)号：US11657796B2

公开(公告)日：2023-05-23

申请号：US17564822

申请日：2021-12-29

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Shanjun Li ,  Tiangui Ye

IPC: G10K11/178

CPC classification number: G10K11/17815 ,  G10K11/17819

Abstract: An active control method for filtered reference affine projection sign algorithm based on variable step size includes: S1, acquiring impulse noise signals and transmitting the signals to control filters; S2, transmitting the impulse noise signals by the control filters to post filters; S3, generating cancellation signals of the impulse noise signals by the post filters according to the impulse noise signals and internal active control algorithms, and transmitting the cancellation signals to a speaker; S4, sending out the cancellation signal by the speaker to superimpose with the impulse noise signals to cancel the impulse noise signal. A convex combination structure and a variable step size strategy are adopted, and by adjusting step size coefficients in the control filter structure, convergence speed of algorithm is controlled, contradiction between convergence speed and steady-state error is coordinated, convergence performance of control algorithm to impulse noises is improved, and impulse noises are effectively controlled.

公开(公告)号：US11624419B2

公开(公告)日：2023-04-11

申请号：US17237106

申请日：2021-04-22

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Junjie Yuan ,  Tiangui Ye ,  Zhigang Liu

IPC: F16F15/03 ,  F16F15/02

Abstract: The disclosure provides a magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness. The disclosure relates to the technical field of vibration control. The disclosure can selectively realize passive negative stiffness and active negative stiffness by adjusting the control mode of a controller. By adopting an amplifying mechanism and DIESOLE type electromagnets, the bearing capacity of the vibration isolator is further increased, and the disclosure is suitable for the field of ultra-low frequency heavy load vibration reduction and isolation. The displacement state of a negative stiffness mechanism can be measured in real time according to a sensor, and by means of cooperation of the controller and a driver, active negative stiffness is realized, real-time linear negative stiffness is realized, the multi-stable phenomenon is avoided, and complex dynamic phenomena such as jumping during working of the vibration isolator are prevented. The active negative stiffness is realized, the current passing through the system can be adjusted according to different working conditions, and the system has strong self-adaptive ability, can be applied to vibration-isolated objects of different quality, and can adapt to different working environments.

公开(公告)号：US20220392426A1

公开(公告)日：2022-12-08

申请号：US17564822

申请日：2021-12-29

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Shanjun Li ,  Tiangui Ye

IPC: G10K11/178

Abstract: An active control method for filtered reference affine projection sign algorithm based on variable step size includes: S1, acquiring impulse noise signals and transmitting the signals to control filters; S2, transmitting the impulse noise signals by the control filters to post filters; S3, generating cancellation signals of the impulse noise signals by the post filters according to the impulse noise signals and internal active control algorithms, and transmitting the cancellation signals to a speaker; S4, sending out the cancellation signal by the speaker to superimpose with the impulse noise signals to cancel the impulse noise signal. A convex combination structure and a variable step size strategy are adopted, and by adjusting step size coefficients in the control filter structure, convergence speed of algorithm is controlled, contradiction between convergence speed and steady-state error is coordinated, convergence performance of control algorithm to impulse noises is improved, and impulse noises are effectively controlled.

公开(公告)号：US11313431B1

公开(公告)日：2022-04-26

申请号：US17497100

申请日：2021-10-08

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Junjie Yuan ,  Tiangui Ye ,  Zhigang Liu

IPC: F16F13/00 ,  H02K5/24 ,  F16F15/03 ,  H02K1/18

Abstract: A quasi-zero stiffness electromagnetic vibration isolator for ultra-low frequency vibration reduction and isolation is provided. When the vibration isolator is in a static equilibrium position, upper and lower air gaps are equal, and electromagnetic attraction forces of upper and lower stator assemblies to a mover assembly are equal. When the load tends to move upwards, the mover assembly is subjected to an upward resultant force, when the load tends to move downwards, the mover assembly is subjected to a downward resultant force, showing the characteristic of negative stiffness. A negative stiffness mechanism composed of the upper stator assembly, the lower stator assembly and the mover assembly is connected in parallel with the positive stiffness springs to achieve a quasi-zero stiffness.

公开(公告)号：US11859686B2

公开(公告)日：2024-01-02

申请号：US17236297

申请日：2021-04-21

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Junjie Yuan ,  Tiangui Ye ,  Zhigang Liu

IPC: F16F15/00 ,  F16F15/03

CPC classification number: F16F15/002 ,  F16F15/03 ,  F16F2222/06 ,  F16F2228/001 ,  F16F2228/063 ,  F16F2230/18

Abstract: The present disclosure is an electromagnetic force control method of a magnetic disk type negative stiffness electromagnetic actuator. The present disclosure relates to the technical field of vibration control. According to the actually required static bearing capacity, the present disclosure determines the positive stiffness k of a mechanical spring required for a magnetic disk type quasi-zero stiffness vibration isolator; and establishes an electromagnetic force mathematical model of a single electromagnet under a condition of magnetic unsaturation. The present disclosure aims at the magnetic disk type quasi-zero stiffness vibration isolator and takes the coil current as an input control variable, so that the electromagnetic force and displacement of the negative stiffness electromagnetic actuator have a linear relationship, thereby changing the non-linear nature of a vibration isolation system, avoiding the multi-stable phenomenon caused by the non-linear electromagnetic force during working, and eliminating complex dynamic behaviors such as jumping when the whole vibration isolator works. Complex sensors and control systems are not needed, and implementation manners are simple and convenient.

公开(公告)号：US20210310537A1

公开(公告)日：2021-10-07

申请号：US17236297

申请日：2021-04-21

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Junjie Yuan ,  Tiangui Ye ,  Zhigang Liu

IPC: F16F15/00 ,  F16F15/03

Abstract: The present disclosure is an electromagnetic force control method of a magnetic disk type negative stiffness electromagnetic actuator. The present disclosure relates to the technical field of vibration control. According to the actually required static bearing capacity, the present disclosure determines the positive stiffness k of a mechanical spring required for a magnetic disk type quasi-zero stiffness vibration isolator; and establishes an electromagnetic force mathematical model of a single electromagnet under a condition of magnetic unsaturation. The present disclosure aims at the magnetic disk type quasi-zero stiffness vibration isolator and takes the coil current as an input control variable, so that the electromagnetic force and displacement of the negative stiffness electromagnetic actuator have a linear relationship, thereby changing the non-linear nature of a vibration isolation system, avoiding the multi-stable phenomenon caused by the non-linear electromagnetic force during working, and eliminating complex dynamic behaviors such as jumping when the whole vibration isolator works. Complex sensors and control systems are not needed, and implementation manners are simple and convenient.

公开(公告)号：US20210246964A1

公开(公告)日：2021-08-12

申请号：US17237106

申请日：2021-04-22

Applicant: Harbin Engineering University

Inventor： Guoyong Jin ,  Junjie Yuan ,  Tiangui Ye ,  Zhigang Liu

IPC: F16F15/03 ,  F16F15/02

Abstract: The disclosure provides a magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness. The disclosure relates to the technical field of vibration control. The disclosure can selectively realize passive negative stiffness and active negative stiffness by adjusting the control mode of a controller. By adopting an amplifying mechanism and DIESOLE type electromagnets, the bearing capacity of the vibration isolator is further increased, and the disclosure is suitable for the field of ultra-low frequency heavy load vibration reduction and isolation. The displacement state of a negative stiffness mechanism can be measured in real time according to a sensor, and by means of cooperation of the controller and a driver, active negative stiffness is realized, real-time linear negative stiffness is realized, the multi-stable phenomenon is avoided, and complex dynamic phenomena such as jumping during working of the vibration isolator are prevented. The active negative stiffness is realized, the current passing through the system can be adjusted according to different working conditions, and the system has strong self-adaptive ability, can be applied to vibration-isolated objects of different quality, and can adapt to different working environments.