Electromagnetic variable-damping lock-up type long-period vibration control device

Abstract

Provided in the present application is an electromagnetic variable-damping lock-up type long-period vibration control device, comprising a housing, a rotating shaft, a pendulum mass, a braking assembly, a data acquisition element, an electromagnetic variable-damping module and a control module; the rotating shaft is rotationally connected to the housing; the pendulum mass is fixedly connected to the rotating shaft; the braking assembly is used for locking the rotating shaft; the data acquisition element is connected to the rotating shaft; the electromagnetic variable-damping module is connected to the rotating shaft; the control module is installed on the housing; the control module comprises a data processing unit and a controller, the data processing unit being electrically connected to the data acquisition element and being used for obtaining the angular velocity of the pendulum mass, and the controller being separately and electrically connected to the data processing unit, the braking assembly and the electromagnetic variable-damping module. In the present application, the electromagnetic variable-damping module adjusts the damping magnitude of the rotating shaft by means of changing the electromagnetic intensity, and the controller sets a lock-up duration on the basis of control algorithms so as to prolong the period of the device, thereby achieving better control over long-period and even ultra-long-period vibration.

Description

An electromagnetic variable damping locking long-period vibration control device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 29, 2023, with application number 202311621850.9 and invention name “A electromagnetic variable damping locked long-period vibration control device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of structural engineering technology, and more specifically, relates to an electromagnetic variable damping locking long-period vibration control device. Background Art

[0003] Long-period vibration is a common form of vibration in production and daily life. Long-period vibration, also known as low-frequency vibration, is characterized by its long period. Existing technologies are ineffective in controlling long-period vibration. Common examples of long-period vibration include the vibration of floating offshore structures under wave action, the oscillating vibration of ultra-long pendulums, the vibration of super-high-rise buildings, and the vibration of large-span flexible structures. With the implementation of the national strategy of "building a strong maritime nation," offshore engineering has developed rapidly, with the installed capacity of offshore wind turbines, offshore platforms, and offshore photovoltaics rapidly increasing. Simultaneously, with the advancement of engineering technology, offshore engineering structures are gradually moving from nearshore to offshore, with floating offshore structures becoming a popular development direction. Floating offshore structures offer advantages such as environmental friendliness, minimal impact on the coastal environment, and minimal impact on human life on land. Floating offshore structures are of great significance for deep-sea resource extraction. Furthermore, floating offshore wind turbines and photovoltaic power generation systems offer higher power generation efficiency compared to their land-based and offshore counterparts. However, due to the complex marine environment, offshore structures are subject to complex coupled loads such as waves, currents, ice, wind, and earthquakes. Structures will vibrate under loads, affecting their normal service life and even causing structural damage or failure. Among them, wave loads are the loads that floating marine engineering structures continuously bear, and their period is relatively long, usually in the range of 6-16 seconds. Floating structures will produce vibrations with a long period under the action of wave loads, and their vibration period can be as long as more than 100 seconds. This long-period vibration will have an adverse effect on the normal service life of the structure, and will cause structural fatigue problems, greatly reducing reliability. Therefore, a technology is needed to effectively suppress the long-period vibration problem of marine engineering structures. In addition, the problem of long-period vibration of structures not only exists in marine engineering structures, but is also common in other types of structures, such as super-high-rise building structures, large-span flexible structures, and ultra-long pendulum structures. However, traditional technologies are difficult to produce a good suppression effect on such long-period vibration problems.

[0004] Vibration control technology has developed rapidly in recent years to address various problems caused by structural vibration and eliminate or mitigate vibrations caused by external loads. Vibration control technology is a hot topic not only in civil engineering but also in aerospace, automotive, mechanical, marine, and military engineering. Appropriately implementing a safe vibration control system within a structure can effectively mitigate its dynamic response and reduce damage or fatigue, thereby satisfying public demands for structural safety and comfort and achieving a reasonable balance between safety, economy, and reliability. Numerous studies have demonstrated the significant effectiveness and significance of the application of vibration control technology in civil engineering. It not only prevents or mitigates structural damage, improves its disaster-resistant performance, and protects human life and property, but also extends the lifespan of structures, reduces maintenance costs, and maximizes the comfort requirements for structures under extreme conditions.

[0005] Structural vibration control technology is broadly categorized into four areas: active control, passive control, semi-active control, and hybrid control. Research on passive control technology is relatively mature, with devices such as tuned mass dampers (TMDs) for passive energy absorption, such as the tuned mass damper (TMD), already being applied in numerous civil engineering structures. The principle of TMD control is to adjust the frequency of a substructure (the damper) to be consistent or similar to that of the main structure (the controlled structure), causing the substructure to resonate with the main structure. The substructure's internal damping mechanism dissipates the main structure's vibration energy, thereby reducing the main structure's dynamic response and achieving vibration control. However, since tuned mass dampers are difficult to tune to align with the long-period (low-frequency) vibrations of the controlled structure, they struggle to effectively suppress long-period vibrations. Even if theoretical designs are used to extend the damper's period by increasing its stroke, the damper would be bulky, making it difficult to manufacture and install in practical applications.

[0006] In addition, the period (frequency) of a structure is usually not fixed during its service. For example, the pendulum length of a pendulum crane changes continuously during use, so the period changes continuously. Other types of structures will also experience changes in period (frequency) during use. After the traditional passive control device is designed and installed according to the structural period, its period (frequency) cannot be adjusted. Once the period (frequency) of the control device and the controlled structure are no longer consistent, even with a small deviation, the control effect of the control device will be greatly reduced. Some existing active and semi-active technologies can achieve period (frequency) adjustment to a certain extent, but the adjustment range is limited and cannot meet the needs of long-period vibration control. In addition, existing passive vibration control technologies cannot achieve damping adjustment. Due to the long-term use of the damper, its damping will change, which will greatly reduce the control effect of the device.

[0007] To sum up, for the problem of long-period vibration, the existing technology mainly has the following five deficiencies: First, the existing technology has poor control effect on the long-period vibration of the structure; Second, even if the existing technology can theoretically produce a certain control effect on the long-period vibration, the stroke required for the control device is often extremely large, which leads to a very large design volume of the device and is difficult to manufacture and install in actual engineering; Third, it is difficult for the existing passive control technology to achieve the adjustment of the period (frequency) of the control device after installation and use, and once the damper and the controlled structure are out of adjustment, the control effect will be greatly reduced; Fourth, some existing active or semi-active technologies have period (frequency) adjustment functions, but their adjustment range is limited, which is difficult to meet the needs of long-period vibration control, and active and semi-active technologies rely on external energy, and have low stability and robustness; Fifth, the existing passive control technology cannot achieve variable damping function, the control effect is limited, and the control effect is greatly reduced after long-term use. Technical issues

[0008] The purpose of the embodiments of the present application is to provide an electromagnetic variable damping locked long-period vibration control device to solve the technical problems in the prior art that traditional vibration control devices cannot achieve variable damping function and are difficult to effectively control the long-period vibration of the structure; traditional vibration control devices require long stroke and large volume for long-period vibration and are difficult to manufacture and install; traditional vibration control devices cannot adjust the period (frequency) after design and installation. Technical Solutions

[0009] To achieve the above-mentioned objectives, the technical solution adopted in the present application is as follows: providing an electromagnetic variable damping locked long-period vibration control device, comprising a housing, a rotating shaft, a pendulum-type mass body, a brake assembly, a data acquisition element, an electromagnetic variable damping module, and a control module; the rotating shaft is rotatably connected to the housing; the pendulum-type mass body is fixedly connected to the rotating shaft; the brake assembly is used to lock the rotating shaft; the data acquisition element is connected to the rotating shaft, and the data acquisition element is used to collect rotation angle data of the rotating shaft; the electromagnetic variable damping module is connected to the rotating shaft, and the damping of the rotating shaft can be adjusted by adjusting the electromagnetic strength of the electromagnetic variable damping module; The control module is installed on the housing, and the control module includes a data processing unit and a controller; the data processing unit is electrically connected to the data acquisition element, and is used to process the rotation angle data and obtain the angular velocity of the pendulum mass body; the controller is electrically connected to the data processing unit, the brake assembly and the electromagnetic variable damping module respectively; when the angular velocity obtained by the controller is equal to 0, the controller sends a locking instruction to the brake assembly, and the pendulum mass body stops swinging; after the controller completes the locking of the locking time according to different control algorithms, the controller sends an unlocking instruction to the brake assembly, and the pendulum mass body resumes swinging.

[0010] Optionally, the brake assembly includes a brake disc and a brake caliper; the brake disc is mounted on the rotating shaft; the brake caliper is mounted on the housing; the brake caliper is capable of clamping the brake disc; and a brake gap is provided between the brake caliper and the brake disc.

[0011] Optionally, the brake caliper includes a base, a brake piston and a friction plate; the base is mounted on the housing, and a groove is provided on the base; one end of the brake piston is connected to the first side wall of the groove, and the other end of the brake piston is connected to the friction plate; the brake disc is located between the friction plate and the second side wall of the groove, and the first side wall and the second side wall are two parallel and opposite side walls.

[0012] Optionally, the brake piston is connected to the controller via an oil pipeline, and the controller can adjust the oil pressure in the oil pipeline to control the activity of the brake piston.

[0013] The pendulum mass body is vertically connected to the rotation axis, and the pendulum mass body can swing in a plane perpendicular to the rotation axis.

[0014] Optionally, the plate surface of the brake disc is parallel to the swinging surface of the pendulum mass body and perpendicular to the axis of the rotating shaft.

[0015] Optionally, the electromagnetic variable damping module includes an electromagnetic motor, which is coaxially connected to the rotating shaft and electrically connected to the controller, and the controller is capable of adjusting the electromagnetic strength of the electromagnetic motor.

[0016] Optionally, the control module further includes a micro battery, the micro battery is electrically connected to the electromagnetic motor, and the electromagnetic motor can generate part of the electrical energy and store it in the micro battery.

[0017] Optionally, the data acquisition element is an encoder.

[0018] Optionally, the electromagnetic variable damping locked long-period vibration control device further includes a bearing, an outer ring of the bearing is connected to the housing, and an inner ring of the bearing is connected to the rotating shaft. Beneficial effects

[0019] The beneficial effects of the electromagnetic variable damping locked long-period vibration control device provided by this application are:

[0020] (1) Compared with the prior art, the present application is provided with an electromagnetic variable damping module. By changing the electromagnetic strength of the electromagnetic variable damping module, the damping size of the rotating shaft can be adjusted in real time, thereby ensuring the control effect.

[0021] (2) Compared with the prior art, in the present application, the brake assembly, data acquisition element, data processing unit and controller constitute a locking module. The controller sets the locking duration according to the control algorithm, which can extend the period of the vibration control device, and the period extension range is wide, which has a better control effect on long-period and even ultra-long-period vibrations.

[0022] (3) Compared with the prior art, in the present application, since the locking module can directly extend the period of the vibration control device, the period can be directly extended without increasing the stroke of the pendulum mass body. In the case where the stroke of the vibration control device is limited and the volume is small, the period of the vibration control device can be extended and adjusted to match the period of the controlled structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] FIG1 is a schematic diagram of the three-dimensional structure of an electromagnetic variable damping locking long-period vibration control device provided in an embodiment of the present application;

[0025] FIG2 is a second schematic diagram of the three-dimensional structure of the electromagnetic variable damping locking long-period vibration control device provided in an embodiment of the present application;

[0026] FIG3 is a schematic top view of the structure of an electromagnetic variable damping locking long-period vibration control device provided in an embodiment of the present application;

[0027] FIG4 is a schematic diagram of the left side structure of the electromagnetic variable damping locking long period vibration control device provided in an embodiment of the present application;

[0028] FIG5 is a cross-sectional structural diagram along line AA in FIG3 ;

[0029] FIG6 is a schematic diagram of the installation of an electromagnetic variable damping locking long-period vibration control device in a controlled structure according to an embodiment of the present application;

[0030] FIG7 is a side view of the installation of the electromagnetic variable damping locking long-period vibration control device provided in an embodiment of the present application in a controlled structure;

[0031] FIG8 is a flowchart illustrating an implementation of a locking module in an electromagnetic variable damping locking long-period vibration control device according to an embodiment of the present application;

[0032] FIG9 is a diagram showing the working principle of the locking module in the electromagnetic variable damping locking long-period vibration control device provided in an embodiment of the present application;

[0033] FIG10 is a time history curve of the swing angle of the pendulum mass body under a simple harmonic excitation test of the electromagnetic variable damping locking long-period vibration control device provided in an embodiment of the present application and the traditional control device.

[0034] Among them, the reference numerals in the figures are:

[0035] 10-housing;

[0036] 20-rotation axis;

[0037] 30- pendulum mass;

[0038] 40-brake assembly; 41-brake caliper; 42-brake disc;

[0039] 50-control module;

[0040] 60-electromagnetic motor;

[0041] 70-data acquisition component;

[0042] 80-bearing;

[0043] 90-mounting screw hole;

[0044] 100-accused structure. Modes for Carrying Out the Invention

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0046] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0047] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0049] Please refer to Figures 1 and 2 together, and the electromagnetic variable damping locked long-period vibration control device provided in the embodiment of the present application will now be described. The electromagnetic variable damping locked long-period vibration control device includes a housing 10, a rotating shaft 20, a pendulum mass body 30, a brake assembly 40, a data acquisition element 70, an electromagnetic variable damping module and a control module 50; the rotating shaft 20 is rotatably connected to the housing 10; the pendulum mass body 30 is fixedly connected to the rotating shaft 20; the brake assembly 40 is used to lock the rotating shaft 20; the data acquisition element 70 is connected to the rotating shaft 20, and the data acquisition element 70 is used to collect the rotation angle data of the rotating shaft 20; the electromagnetic variable damping module is connected to the rotating shaft 20, and the resistance of the rotating shaft 20 can be adjusted by adjusting the electromagnetic strength of the electromagnetic variable damping module. The control module 50 is mounted on the housing 10 and includes a data processing unit and a controller. The data processing unit is electrically connected to the data acquisition element 70 for processing the rotation angle data and obtaining the angular velocity of the pendulum mass body 30. The controller is electrically connected to the data processing unit, the brake assembly 40 and the electromagnetic variable damping module, respectively. When the angular velocity obtained by the controller is equal to 0, the controller sends a locking instruction to the brake assembly 40, and the pendulum mass body 30 stops swinging. After the controller completes the locking for the locking time according to different control algorithms, the controller sends an unlocking instruction to the brake assembly 40, and the pendulum mass body 30 resumes swinging.

[0050] In this embodiment, the brake assembly 40, the data acquisition element 70, the data processing unit and the controller constitute a locking module, through which the period of the vibration control device can be extended and adjusted; the rotating shaft 20 and the pendulum mass body 30 constitute a control force module, through which the effective control force is output.

[0051] Compared with the prior art, the electromagnetic variable damping locked long-period vibration control device provided in the present application is provided with an electromagnetic variable damping module. By changing the electromagnetic strength of the electromagnetic variable damping module, the damping size of the rotating shaft 20 is adjusted in real time to ensure the control effect.

[0052] In an embodiment of the present application, a brake assembly, a data acquisition element, a data processing unit and a controller constitute a locking module; the controller sets the locking duration according to the control algorithm, which can extend the cycle of the vibration control device, and the cycle extension range is wide, which has a better control effect on long-period and even ultra-long-period vibrations.

[0053] In the present application, since the locking module can directly extend the period of the vibration control device, the period can be directly extended without increasing the stroke of the pendulum mass body 30. When the stroke of the vibration control device is limited and the volume is small, the period of the vibration control device can be extended and adjusted to match the period of the controlled structure.

[0054] In one embodiment of the present application, please refer to Figures 3 and 4 together. The brake assembly 40 includes a brake disc 42 and a brake caliper 41; the brake disc 42 is mounted on the rotating shaft 20; the brake caliper 41 is mounted on the housing 10; the brake caliper 41 can clamp the brake disc 42; and there is a brake gap between the brake caliper 41 and the brake disc 42.

[0055] It is understandable that when the rotating shaft 20 rotates, the brake disc 42 will also rotate accordingly. By setting a brake gap between the brake disc 42 and the brake caliper 41, it is possible to avoid interference between the brake caliper 41 and the rotation of the brake disc 42 when the brake assembly 40 is not working, thereby ensuring that the rotation of the rotating shaft 20 is not affected.

[0056] In one embodiment of the present application, the brake caliper 41 includes a base, a brake piston and a friction plate; the base is mounted on the housing 10, and a groove is provided on the base; one end of the brake piston is connected to the first side wall of the groove, and the other end of the brake piston is connected to the friction plate; the brake disc 42 is located between the friction plate and the second side wall of the groove, and the first side wall and the second side wall are two parallel and opposite side walls.

[0057] In this embodiment, the brake piston can extend or contract, thereby driving the friction pad to move toward or away from the brake disc 42. When the brake piston extends, the friction pad moves toward the brake disc, clamping the brake disc between the friction pad and the base. At this time, the rotating shaft 20 cannot rotate relative to the housing 10, thereby locking the pendulum mass 30. When the brake piston contracts, the friction pad moves away from the brake disc, separating the friction pad and the brake disc, allowing the rotating shaft 20 to continue to rotate relative to the housing 10, thereby releasing the lock on the pendulum mass 30.

[0058] In one embodiment of the present application, the brake piston is connected to the controller via an oil pipeline, and the controller can adjust the oil pressure in the oil pipeline to control the movement of the brake piston.

[0059] In one embodiment of the present application, the pendulum mass body 30 is vertically connected to the rotation shaft 20 , and the pendulum mass body 30 can swing in a plane perpendicular to the rotation shaft 20 .

[0060] In one embodiment of the present application, a plate surface of the brake disc 42 is parallel to the swinging plane of the pendulum mass body 30 and perpendicular to the axis of the rotating shaft 20 .

[0061] In this embodiment, the plate surface of the brake disc 42 is perpendicular to the axis of the rotating shaft 20. When the rotating shaft 20 rotates, the swing of the brake disc 42 in the length direction of the rotating shaft 20 can be reduced, thereby preventing the brake disc 42 from contacting the friction plate or the base, thereby ensuring that the rotation of the rotating shaft 20 is not affected.

[0062] In one embodiment of the present application, please refer to Figures 1 and 4 together. The electromagnetic variable damping module includes an electromagnetic motor 60, which is coaxially connected to the rotating shaft 20. The electromagnetic motor 60 is electrically connected to the controller, and the controller can adjust the electromagnetic strength of the electromagnetic motor 60.

[0063] In one embodiment of the present application, the control module 50 further includes a micro battery, which is electrically connected to the electromagnetic motor 60 , and the electromagnetic motor 60 can generate a portion of electrical energy and store it in the micro battery.

[0064] It is understandable that the micro battery is electrically connected to the controller. During the damping adjustment process, the electromagnetic motor 60 will also generate some electrical energy due to the rotation of the rotating shaft 20, which is stored in the micro battery and can provide the controller with some of the electrical energy required for its operation.

[0065] In this embodiment, the controller can not only control the brake piston, but also control the electromagnetic motor 60, thereby ensuring the efficiency of the coordinated work between the locking module and the electromagnetic variable damping module.

[0066] In one embodiment of the present application, the data acquisition element 70 can specifically be an encoder, which is located at the tail end of the electromagnetic motor 60 and coaxially connected to the rotating shaft 20. The encoder is used to collect the angle data of the rotating shaft 20. The angle data can be the angle that the rotating shaft 20 rotates within a certain period of time.

[0067] In one embodiment of the present application, please refer to Figures 1 and 5 together. The electromagnetic variable damping locked long-period vibration control device also includes a bearing 80, the outer ring of the bearing 80 is connected to the housing 10, and the inner ring of the bearing 80 is connected to the rotating shaft 20.

[0068] In this embodiment, the provision of bearing 80 supports the rotating shaft 20 and reduces resistance to relative rotation between the rotating shaft 20 and the housing 10, thereby minimizing energy loss during the swinging of the pendulum-type mass 30 and facilitating long-period vibration control requirements. Specifically, bearing 80 can be a ball bearing.

[0069] In one embodiment of the present application, an electromagnetic variable damping, locked, long-period vibration control device is mounted on a controlled structure 100. Specifically, referring to Figures 1, 6, and 7, a housing 10 is provided with mounting screw holes 90. Bolts are screwed into these holes to connect the housing 10 to the controlled structure 100. The reciprocating oscillation of the pendulum-type mass 30 about the rotation axis 20 generates a linear control force, which is then transmitted to the controlled structure 100 through the housing 10.

[0070] In this embodiment, the shape and mass of the pendulum-type mass body are not limited, and its specific shape and mass can be designed according to the linear control force required by the controlled structure 100.

[0071] Referring to Figures 8 and 9 , the electromagnetic variable damping locking long-period vibration control device provided in this embodiment operates as follows: a data acquisition element 70 acquires angular data of the rotating shaft 20. This angular data is processed by a data processing unit to obtain the angular velocity of the pendulum mass 30. The data processing unit transmits the processed angular velocity signal to a controller. The controller determines the magnitude of the angular velocity signal. When the angular velocity is not equal to zero, the pendulum mass 30 maintains its original state. When the angular velocity is equal to zero, the controller issues a locking command, causing the brake assembly 40 to execute the locking operation (the brake piston extends, and the friction plate and base clamp the brake disc 42), thereby locking the pendulum mass 30 and maintaining the angular velocity at zero. After completing the locking period according to different control algorithms, the controller issues an unlocking command to unlock the brake assembly 40 (the brake piston shortens, and the friction plate and brake disc 42 separate), thereby releasing the pendulum and resuming its original motion state.

[0072] Figure 10 illustrates a comparison of the time history curves of the swing angle of the pendulum mass 30 under simple harmonic excitation testing between the electromagnetic variable damping locked long-period vibration control device provided by an embodiment of the present application and a conventional control device. The ideal swing angle stroke is the time history curve that produces the best control effect on the controlled structure 100. However, this scenario requires the pendulum length of the pendulum mass 30 to be too large, which is not applicable to this embodiment. When the pendulum length of the pendulum mass 30 is selected to be constant, the conventional control device lacks a locking module, and the phase difference between its swing angle stroke and the ideal swing angle stroke is large. In this case, no control effect can be achieved and the vibration response of the controlled structure 100 may even be amplified. This embodiment uses a vibration control device with a locking module. Due to the locking duration, its phase is essentially the same as the ideal swing angle phase. The horizontal segment of the time history in the figure represents the lockup period, during which the angular velocity of the pendulum remains zero and the swing angle remains unchanged.

[0073] The electromagnetic variable damping locking long-period vibration control device provided in the embodiment of the present application can be applied to but not limited to long-period and ultra-long-period vibration control, long-period vibration of floating marine structures, long-period vibration control of super-high-rise structures, long-period vibration of large-span flexible structures, and long-period vibration control of long simple pendulum structures.

[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An electromagnetic variable damping locking long period vibration control device, characterized in that: include: shell; A rotating shaft, the rotating shaft being rotatably connected to the housing; A pendulum-type mass body, wherein the pendulum-type mass body is fixedly connected to the rotating shaft; A brake assembly, the brake assembly is used to lock the rotating shaft; A data acquisition element, the data acquisition element is connected to the rotating shaft, and the data acquisition element is used to collect the rotation angle data of the rotating shaft; An electromagnetic variable damping module, the electromagnetic variable damping module is connected to the rotating shaft, and the damping of the rotating shaft can be adjusted by adjusting the electromagnetic strength of the electromagnetic variable damping module; as well as A control module, the control module is mounted on the housing, the control module comprises a data processing unit and a controller; the data processing unit is electrically connected to the data acquisition element, and is used to process the rotation angle data and obtain the angular velocity of the pendulum-type mass body; The controller is electrically connected to the data processing unit, the brake assembly and the electromagnetic variable damping module respectively; When the angular velocity obtained by the controller is equal to 0, the controller sends a locking instruction to the brake assembly, and the pendulum mass body stops swinging; after the controller completes the locking of the locking time according to different control algorithms, the controller sends an unlocking instruction to the brake assembly, and the pendulum mass body resumes swinging.

2. The electromagnetic variable damping locking type long period vibration control device according to claim 1, characterized in that: The brake assembly comprises: a brake disc mounted on the rotating shaft; and A brake caliper is mounted on the housing; the brake caliper is capable of clamping the brake cylinder. There is a brake gap between the brake caliper and the brake disc.

3. The electromagnetic variable damping locking type long period vibration control device as claimed in claim 2, characterized in that: The brake caliper includes a base, a brake piston and a friction plate; the base is installed on the housing, and a groove is provided on the base; one end of the brake piston is connected to the first side wall of the groove, and the other end of the brake piston is connected to the friction plate; the brake disc is located between the friction plate and the second side wall of the groove, and the first side wall and the second side wall are two parallel and opposite side walls.

4. The electromagnetic variable damping locking type long period vibration control device as claimed in claim 3, characterized in that: The brake piston is connected to the controller via an oil pipeline, and the controller can adjust the oil pressure in the oil pipeline to control the activity of the brake piston.

5. The electromagnetic variable damping locking type long period vibration control device according to claim 1, characterized in that: The pendulum-type mass body is vertically connected to the rotation axis, and the pendulum-type mass body can swing in a plane vertical to the rotation axis.

6. The electromagnetic variable damping locking type long period vibration control device as claimed in claim 2, characterized in that: The plate surface of the brake disc is parallel to the swinging surface of the pendulum-type mass body and perpendicular to the axis of the rotating shaft.

7. The electromagnetic variable damping locking type long period vibration control device according to claim 6, characterized in that: The electromagnetic variable damping module comprises an electromagnetic motor, the electromagnetic motor is coaxially connected to the rotating shaft, the electromagnetic motor is electrically connected to the controller, and the controller can adjust the electromagnetic strength of the electromagnetic motor.

8. The electromagnetic variable damping locking type long period vibration control device according to claim 7, characterized in that: The control module also includes a micro battery, which is electrically connected to the electromagnetic motor. The electromagnetic motor can generate part of the electrical energy and store it in the micro battery.

9. The electromagnetic variable damping locking type long period vibration control device according to claim 1, characterized in that: The data acquisition element is an encoder.

10. The electromagnetic variable damping locking long period vibration control device according to any one of claims 1 to 9, characterized in that: The electromagnetic variable damping locking type long-period vibration control device also includes a bearing, an outer ring of the bearing is connected to the housing, and an inner ring of the bearing is connected to the rotating shaft.

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