Electromagnetic variable damping locking type long-period vibration control device
By introducing an electromagnetic variable damping module and a locking module into the long-period vibration control device, the problem of poor long-period vibration control effect in the prior art is solved, and effective control and periodic adjustment of long-period vibration in the miniaturized device is realized.
Patent Information
- Application Number
- CN202311621850.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2025-05-30
AI Technical Summary
The prior art is difficult to effectively control long-period vibration, traditional vibration control devices cannot realize variable damping function, and have poor long-period vibration control effect, the device design is large, difficult to manufacture and install, and the cycle and damping cannot be adjusted.
The electromagnetic variable damping locking long-period vibration control device is adopted, including a housing, a rotating shaft, a swing mass body, a brake assembly, a data acquisition element, an electromagnetic variable damping module and a control module. The damping is adjusted through the electromagnetic variable damping module, and the locking module extends the cycle, achieving effective control of long-period vibration.
Effective control of long-period vibration is realized, and the cycle can be extended and adjusted in the miniaturized device, matching the cycle of the controlled structure, and improving the control effect.
Smart Images
Figure CN120062294A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of structural engineering. More specifically, it relates to an electromagnetic variable damping locking type long-period vibration control device. Background Art
[0002] Long-period vibration is a common form of vibration in production and life. Long-period vibration, i.e., low-frequency vibration, is characterized by a long vibration period. The existing technology has poor control effects on long-period vibration. Common long-period vibrations include the vibration of floating offshore engineering structures under the action of waves, the pendulum vibration of ultra-long pendulums, the vibration of super-high-rise building structures, the vibration of large-span flexible structures, etc. With the implementation of the national strategy of "building a strong ocean country", the offshore engineering has developed rapidly, and the installed capacity of offshore engineering structures such as offshore wind turbines, offshore platforms, and offshore photovoltaic power generation has increased rapidly. At the same time, with the development of engineering technology, offshore engineering structures are gradually moving from inshore to offshore, and floating offshore engineering structures have become a popular development direction. Floating offshore engineering structures have the advantages of environmental protection, little impact on the coastal environment, and little impact on human life on land. Floating offshore structures are of great significance for the exploitation of deep-sea resources. In addition, floating offshore wind turbines and photovoltaic power generation have the advantage of high power generation efficiency compared with onshore and inshore areas. However, due to the complex marine environment, offshore engineering structures will be affected by complex coupled loads, such as waves, currents, ice, wind, earthquakes, etc. The structure will vibrate under the action of the load, affecting the normal service of the structure, and even causing structural damage or failure. Among them, the wave load is the load that floating offshore engineering structures continuously bear, and its period is relatively long, usually in the range of 6 - 16 seconds. The floating structure will generate vibrations with a relatively long period under the action of the wave load, and its vibration period can be up to more than 100 seconds. This long-period vibration will have an adverse impact on the normal service of the structure, and will cause structural fatigue problems, greatly reducing the reliability. Therefore, a technology is needed to effectively suppress the long-period vibration problem of offshore engineering structures. In addition, the problem of long-period vibration of structures not only exists in offshore engineering structures, but is also relatively common in other types of structures, such as super-high-rise building structures, large-span flexible structures, ultra-long pendulum structures, etc. However, traditional technologies are difficult to produce good suppression effects on such long-period vibration problems.
[0003] To solve various problems caused by the vibration of structures and eliminate or mitigate the vibration caused by external loads, vibration control technology has developed rapidly in recent years. Not only in the field of civil engineering, vibration control technology is also a hot topic in the fields of aerospace, automotive, machinery, ocean engineering, military engineering, etc. Appropriately installing a vibration control system in a structure can effectively reduce the dynamic response of the structure, mitigate the damage or fatigue of the structure, thereby meeting people's requirements for the safety, comfort, etc. of the structure and achieving a reasonable balance among safety, economy, and reliability. A large number of studies have shown that the application of vibration control technology in civil engineering has significant effects and important meanings. It can not only prevent or mitigate the damage of structures, improve the disaster prevention performance of structures, and ensure the safety of people's lives and property, but also extend the service life of structures, reduce the maintenance cost of structures, and meet people's comfort requirements for structures under extreme conditions to the greatest extent.
[0004] Structural vibration control technology is mainly divided into the following four aspects: active control, passive control, semi-active control, and hybrid control. Among them, the research on passive control technology has been relatively mature. Devices used for passive tuned energy absorption, such as tuned mass dampers (TMD), have been applied in many civil engineering structures. The principle of TMD control is to make the frequency of the sub-structure, that is, the damper, the same as or close to that of the main structure, that is, the controlled structure, so that the sub-structure resonates with the main structure, and the vibration energy of the main structure is dissipated through the internal damping mechanism of the sub-structure, thereby reducing the dynamic response of the main structure and achieving the purpose of vibration control. However, since it is difficult for a tuned mass damper to adjust its frequency to be the same as the long-period vibration (low-frequency vibration) of the controlled structure, it is difficult to produce a good inhibitory effect on long-period vibration. Even according to theoretical design, increasing the stroke of the damper to extend the period of the damper will result in a huge volume of the damper, making it difficult to manufacture and install in actual engineering.
[0005] In addition, the period (frequency) of a structure during its service life is usually not fixed. For example, for a pendulum structure, the pendulum length of a pendulum crane changes continuously during use, so the period changes continuously. The periods (frequencies) of other types of structures will also change during use. After a traditional passive control device is designed and installed according to the structure period, its period (frequency) cannot be adjusted. Once the periods (frequencies) of the control device and the controlled structure are no longer the same, 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 requirements of long-period vibration control. Moreover, the existing passive vibration control technology cannot achieve damping adjustment. Due to the long-term use of the damper, its damping will change, which will lead to a significant reduction in the control effect of the device.
[0006] In summary, for the long-period vibration problem, the existing technologies mainly have the following five deficiencies: First, the existing technologies have poor control effects on the long-period vibration of structures; Second, even if the existing technologies have certain control effects on long-period vibration theoretically, the required stroke of the control device is often extremely large, resulting in an extremely large volume of the device design and making it difficult to manufacture and install in actual engineering; Third, it is difficult for the existing passive control technologies to adjust the period (frequency) of the control device after installation and use. Once the damper and the controlled structure are out of adjustment, the control effect will be greatly reduced; Fourth, some of the existing active or semi-active technologies have the function of period (frequency) adjustment, but their adjustment range is limited, making it difficult to meet the requirements of long-period vibration control, and the active and semi-active technologies rely on external energy sources, with low stability and robustness; Fifth, the existing passive control technologies cannot achieve the variable damping function, with limited control effects and a significant reduction in control effects after long-term use. Summary of the Invention
[0007] The purpose of the embodiments of the present application is to provide an electromagnetic variable damping locking type long-period vibration control device to solve the technical problems in the existing technologies that the traditional vibration control device cannot achieve the variable damping function and is difficult to effectively control the long-period vibration of the structure; the traditional vibration control device requires a long stroke and a large volume for long-period vibration and is difficult to manufacture and install; the traditional vibration control device cannot adjust the period (frequency) after design and installation.
[0008] To achieve the above purpose, the technical solution adopted by the present application is: to provide an electromagnetic variable damping locking type long-period vibration control device, including a housing, a rotating shaft, a pendulum mass body, a braking 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 mass body is fixedly connected to the rotating shaft; the braking 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 acquire the angular displacement data of the rotating shaft; the electromagnetic variable damping module is connected to the rotating shaft, and by adjusting the electromagnetic intensity of the electromagnetic variable damping module, the damping of the rotation of the rotating shaft can be adjusted; 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 angular displacement data and obtain the angular velocity of the pendulum mass body; the controller is respectively electrically connected to the data processing unit, the braking assembly, and the electromagnetic variable damping module; when the angular velocity obtained by the controller is equal to 0, the controller sends a locking instruction to the braking assembly, and the pendulum mass body stops swinging; after the controller completes the locking of the locking duration according to different control algorithms, the controller sends an unlocking instruction to the braking assembly, and the pendulum mass body resumes swinging.
[0009] 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 can clamp the brake disc; there is a braking gap between the brake caliper and the brake disc.
[0010] Optionally, the brake caliper includes a base, a brake piston and a friction pad; 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 pad; the brake disc is located between the friction pad 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.
[0011] Optionally, the brake piston is connected to the controller through an oil pipeline, and the controller can adjust the oil pressure in the oil pipeline to control the movement of the brake piston.
[0012] The pendulum mass body is vertically connected to the rotating shaft, and the pendulum mass body can swing in a plane perpendicular to the rotating shaft.
[0013] Optionally, the plane of the brake disc is parallel to the swing plane of the pendulum mass body and perpendicular to the axis of the rotating shaft.
[0014] Optionally, the electromagnetic variable damping module includes 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 intensity of the electromagnetic motor.
[0015] 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 electric energy and store it in the micro battery.
[0016] Optionally, the data acquisition element is an encoder.
[0017] Optionally, the electromagnetic variable damping locking type long-period vibration control device further includes a bearing, the outer ring of the bearing is connected to the housing, and the inner ring of the bearing is connected to the rotating shaft.
[0018] The beneficial effects of the electromagnetic variable damping locking type long-period vibration control device provided by this application are as follows:
[0019] (1) Compared with the prior art, in this application, an electromagnetic variable damping module is provided, and by changing the electromagnetic intensity of the electromagnetic variable damping module, the damping magnitude of the rotation of the rotating shaft can be adjusted in real time, ensuring the control effect.
[0020] (2) Compared with the prior art, in the present application, the brake assembly, the data acquisition element, the data processing unit, and the controller form 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 range of period extension is wide, and it has a better control effect on long-period and even ultra-long-period vibrations.
[0021] (3) Compared with the prior art, in the present application, since the locking module can directly extend the period of the vibration control device, therefore, it is not necessary to increase the stroke of the pendulum mass body to directly extend its period, and it can extend and adjust the period of the vibration control device to match the period of the controlled structure under the condition that the stroke of the vibration control device is limited and the volume is small. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0023] Figure 1 is a schematic three-dimensional structure of the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application Figure 1 ;
[0024] Figure 2 is a schematic three-dimensional structure of the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application Figure 2 ;
[0025] Figure 3 is a schematic top view structure diagram of the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application;
[0026] Figure 4 is a schematic left view structure diagram of the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application;
[0027] Figure 5 is along Figure 3 the sectional view taken along line A-A in
[0028] Figure 6 is an installation schematic diagram of the electromagnetic variable damping locking type long-period vibration control device in the controlled structure provided by the embodiment of the present application;
[0029] Figure 7 is an installation side view of the electromagnetic variable damping locking type long-period vibration control device in the controlled structure provided by the embodiment of the present application;
[0030] Figure 8It is the implementation flowchart of the locking module in the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application;
[0031] Figure 9 It is the working principle diagram of the locking module in the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application;
[0032] Figure 10 It is the time history curve of the pendulum mass body swing angle during the harmonic excitation test of the electromagnetic variable damping locking type long-period vibration control device provided by the embodiment of the present application and the traditional control device.
[0033] Among them, the reference numerals in the figure are as follows:
[0034] 10 - Housing;
[0035] 20 - Rotating shaft;
[0036] 30 - Pendulum mass body;
[0037] 40 - Brake assembly; 41 - Brake caliper; 42 - Brake disc;
[0038] 50 - Control module;
[0039] 60 - Electromagnetic motor;
[0040] 70 - Data acquisition element;
[0041] 80 - Bearing;
[0042] 90 - Mounting screw hole;
[0043] 100 - Structure to be controlled. Detailed implementation manners
[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be 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 the present application and are not used to limit the present application.
[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.
[0046] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.
[0048] Please refer to Figure 1 and Figure 2 together, and now a description will be given of the electromagnetic variable-damping locking type long-period vibration control device provided by the embodiments of the present application. The electromagnetic variable-damping locking type 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 acquire the angular data of the rotating shaft 20; the electromagnetic variable-damping module is connected to the rotating shaft 20, and by adjusting the electromagnetic intensity of the electromagnetic variable-damping module, the damping of the rotation of the rotating shaft 20 can be adjusted; the control module 50 is installed on the housing 10, and the control module 50 includes a data processing unit and a controller; the data processing unit is electrically connected to the data acquisition element 70 and is used to process the angular data and obtain 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 issues a locking instruction to the brake assembly 40, and the pendulum mass body 30 stops swinging; after the controller completes the locking of the locking duration according to different control algorithms, the controller issues an unlocking instruction to the brake assembly 40, and the pendulum mass body 30 resumes swinging.
[0049] In this embodiment, the brake assembly 40, the data acquisition element 70, the data processing unit, and the controller form a locking module, and the period of the vibration control device can be extended and adjusted through the locking module; the rotating shaft 20 and the pendulum mass body 30 form a control force module, and an effective control force is output through the control force module.
[0050] Compared with the prior art, the electromagnetic variable-damping locking long-period vibration control device provided in this application is provided with an electromagnetic variable-damping module, which can adjust the damping of the rotating shaft 20 in real time by changing the electromagnetic intensity of the electromagnetic variable-damping module, ensuring the control effect.
[0051] In the embodiment of this application, the brake assembly, the data acquisition element, the data processing unit, and the controller form 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, and it has a better control effect on long-period and even ultra-long-period vibrations.
[0052] In this application, since the locking module can directly extend the period of the vibration control device, it is not necessary to increase the stroke of the pendulum mass 30 to directly extend its period, and the period of the vibration control device can be extended and adjusted to match the period of the controlled structure when the stroke of the vibration control device is limited and the volume is small.
[0053] In an embodiment of this application, please refer to Figure 3 and Figure 4 , the brake assembly 40 includes a brake disc 42 and a brake caliper 41; the brake disc 42 is installed on the rotating shaft 20; the brake caliper 41 is installed on the housing 10; the brake caliper 41 can clamp the brake disc 42; there is a braking gap between the brake caliper 41 and the brake disc 42.
[0054] It can be understood that when the rotating shaft 20 rotates, the brake disc 42 will also rotate accordingly. By setting a braking gap between the brake disc 42 and the brake caliper 41, it is possible to avoid interference of the brake caliper 41 with the rotation of the brake disc 42 when the brake assembly 40 is not working, and thus ensure that the rotation of the rotating shaft 20 is not affected.
[0055] In an embodiment of this application, the brake caliper 41 includes a base, a brake piston, and a friction plate; the base is installed 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.
[0056] In this embodiment, the brake piston can extend or retract, thereby driving the friction plate to move towards or away from the brake disc 42. When the brake piston extends, the friction plate moves towards the brake disc and clamps the brake disc between the friction plate and the base. At this time, the rotating shaft 20 cannot rotate relative to the housing 10, thereby realizing the locking of the pendulum mass 30; when the brake piston retracts, the friction plate moves away from the brake disc, and the friction plate is separated from the brake disc, and the rotating shaft 20 can continue to rotate relative to the housing 10, thereby releasing the locking of the pendulum mass 30.
[0057] In one embodiment of the present application, the brake piston is connected to the controller through an oil pipeline, and the controller can adjust the oil pressure in the oil pipeline to control the movement of the brake piston.
[0058] In one embodiment of the present application, the pendulum mass 30 is perpendicularly connected to the rotating shaft 20, and the pendulum mass 30 can swing in a plane perpendicular to the rotating shaft 20.
[0059] In one embodiment of the present application, the plate surface of the brake disc 42 is parallel to the swinging plane of the pendulum mass 30 and perpendicular to the axis of the rotating shaft 20.
[0060] 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, preventing the brake disc 42 from contacting the friction plate or the base, and thus ensuring that the rotation of the rotating shaft 20 is not affected.
[0061] In one embodiment of the present application, please refer to Figure 1 and Figure 4 , the electromagnetic variable damping module includes an electromagnetic motor 60. The electromagnetic motor 60 is coaxially connected to the rotating shaft 20, and the electromagnetic motor 60 is electrically connected to the controller. The controller can adjust the electromagnetic intensity of the electromagnetic motor 60.
[0062] In one embodiment of the present application, the control module 50 further includes a micro battery. The micro battery is electrically connected to the electromagnetic motor 60, and the electromagnetic motor 60 can generate part of the electric energy and store it in the micro battery.
[0063] It can be understood that the micro battery is electrically connected to the controller. During the damping adjustment process, the electromagnetic motor 60 will also generate part of the electric energy due to the rotation of the rotating shaft 20 and store it in the micro battery, which can provide part of the electric energy required for the operation of the controller.
[0064] In this embodiment, the controller can not only control the brake piston but also control the electromagnetic motor 60, ensuring the efficiency of the coordinated operation between the locking module and the electromagnetic variable damping module.
[0065] In one embodiment of the present application, the data acquisition element 70 can specifically adopt an encoder. The encoder is located at the tail end of the electromagnetic motor 60 and is coaxially connected to the rotating shaft 20. The encoder is used to collect the rotation angle data of the rotating shaft 20, and the rotation angle data can be the angle rotated by the rotating shaft 20 within a certain period of time.
[0066] In one embodiment of the present application, please refer to Figure 1 and Figure 5, the electromagnetic variable-damping locking type long-period vibration control device further 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.
[0067] In this embodiment, by providing the bearing 80, it can play a role in supporting the rotating shaft 20. At the same time, it can also reduce the resistance when the rotating shaft 20 rotates relative to the housing 10, reduce the energy loss when the pendulum mass 30 swings, and is beneficial to meeting the requirements of long-period vibration control. Specifically, the bearing 80 can adopt a ball bearing.
[0068] In an embodiment of the present application, the electromagnetic variable-damping locking type long-period vibration control device is installed on the controlled structure 100. Specifically, please refer to Figure 1 , Figure 6 and Figure 7 . The housing 10 is provided with mounting screw holes 90. By screwing bolts into the mounting screw holes 90, the connection between the housing 10 and the controlled structure 100 is realized. A linear control force is generated by the reciprocating swing of the pendulum mass 30 around the rotating shaft 20, and this linear control force is then transmitted to the controlled structure 100 through the housing 10.
[0069] In this embodiment, the shape and mass of the pendulum mass are not limited, and its specific shape and mass can be designed according to the linear control force required by the controlled structure 100.
[0070] Please refer to Figure 8 and Figure 9 . The working principle of the electromagnetic variable-damping locking type long-period vibration control device provided in this embodiment is as follows: The data acquisition element 70 acquires the angular data of the rotating shaft 20. The angular data is processed by the data processing unit to obtain the angular velocity of the pendulum mass 30. The data processing unit transmits the processed angular velocity signal to the controller. The controller judges the magnitude of the angular velocity signal. When the angular velocity is not equal to 0, the pendulum mass 30 maintains its original state of operation. When the angular velocity is equal to 0, the controller issues a locking command, and the brake assembly 40 executes the locking (the brake piston extends, and the friction plate clamps the brake disc 42 with the base), so that the pendulum mass 30 is locked and the angular velocity is maintained at 0. After the controller completes the locking of the locking duration according to different control algorithms, it issues an unlocking command to make the brake assembly 40 unlock (the brake piston shortens, and the friction plate separates from the brake disc 42), so that the pendulum is released and returns to its original state of motion.
[0071] Figure 10It shows the comparison of the time history curves of the pendulum angle of the electromagnetic variable-damping locking long-period vibration control device provided by the embodiments of the present application and the traditional control device under the simple harmonic excitation test. The ideal stroke of the pendulum angle is the time history curve that produces the best control effect on the controlled structure 100. However, this situation requires an overly long pendulum length of the pendulum mass 30, which is not applicable to this embodiment. When the pendulum length of the pendulum mass 30 is selected to be a certain value, the traditional control device has no locking module, and the phase difference between its pendulum angle stroke and the ideal stroke of the pendulum angle is relatively large. At this time, no control effect can be generated, and even the vibration response of the controlled structure 100 may be amplified. The vibration control device with a locking module is adopted in this embodiment. Due to the existence of the locking duration, its phase is basically the same as the ideal pendulum angle phase. The horizontal section of the time history in the figure is the locking occurrence period. At this time, the angular velocity of the simple pendulum remains 0, and the pendulum angle remains unchanged.
[0072] The electromagnetic variable-damping locking long-period vibration control device provided by the embodiments of the present application can be applied but is not limited to the fields of long-period and ultra-long-period vibration control, long-period vibration of floating ocean structures, long-period vibration control of super-high-rise structures, long-period vibration of large-span flexible structures, long-period vibration control of long single-pendulum structures, etc.
[0073] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. An electromagnetic variable damping locking long-period vibration control device, characterized in that, it includes: a housing; a rotating shaft, the rotating shaft is rotatably connected to the housing; a pendulum mass body, the pendulum mass body is fixedly connected to the rotating shaft; a braking assembly, the braking 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 acquire the angular displacement data of the rotating shaft; an electromagnetic variable damping module, the electromagnetic variable damping module is connected to the rotating shaft, and by adjusting the electromagnetic intensity of the electromagnetic variable damping module, the damping of the rotation of the rotating shaft can be adjusted; and a control 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 angular displacement data and obtain the angular velocity of the pendulum mass body; the controller is respectively electrically connected to the data processing unit, the braking assembly and the electromagnetic variable damping module; when the angular velocity obtained by the controller is equal to 0, the controller sends a locking instruction to the braking assembly, and the pendulum mass body stops swinging; after the controller completes the locking of the locking duration according to different control algorithms, the controller sends an unlocking instruction to the braking assembly, and the pendulum mass body resumes swinging.
2. The electromagnetic variable damping locking long-period vibration control device according to claim 1, characterized in that, the braking assembly includes: a brake disc, the brake disc is installed on the rotating shaft; and a brake caliper, the brake caliper is installed on the housing; the brake caliper can clamp the brake disc; there is a braking gap between the brake caliper and the brake disc.
3. The electromagnetic variable damping locking long-period vibration control device according to 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 long-period vibration control device according to claim 3, characterized in that, the brake piston is connected to the controller through an oil pipeline, and the controller can adjust the oil pressure in the oil pipeline to control the movement of the brake piston.
5. The electromagnetic variable damping locking long-period vibration control device according to claim 1, characterized in that, the pendulum mass body is vertically connected to the rotating shaft, and the pendulum mass body can swing in a plane perpendicular to the rotating shaft.
6. The electromagnetic variable damping locking long-period vibration control device according to claim 2, characterized in that, the plane of the brake disc is parallel to the swinging plane of the pendulum mass body and perpendicular to the axis of the rotating shaft.
7. The electromagnetic variable damping locking long-period vibration control device according to claim 6, characterized in that, The electromagnetic variable damping module includes an electromagnetic motor, which is coaxially connected to the rotating shaft. The electromagnetic motor is electrically connected to the controller, and the controller can adjust the electromagnetic intensity 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 further includes a micro battery, which is electrically connected to the electromagnetic motor, and the electromagnetic motor can generate partial electric 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 type long-period vibration control device according to any one of claims 1-9, characterized in that, the electromagnetic variable damping locking type long-period vibration control device further includes a bearing, the outer ring of the bearing is connected to the housing, and the inner ring of the bearing is connected to the rotating shaft.