A longitudinal-lateral coupling control device for a floating wind turbine

Abstract

The application relates to a floating wind turbine longitudinal and lateral swing coupling control device, which comprises a box body (1) and a magnetic floating layer (2), an electromagnetic layer (3), an impact layer (4), a motion layer (5) and a device cavity (6) installed in the box body (1). The impact block (8) is regulated by the magnetic floating layer (2), the electromagnetic layer (3) and the monitoring control mechanism (10) in the device cavity (6), and the suspension and impact collision are realized in the motion layer (5) between the impact layer (4) and the magnetic floating layer (2). Compared with the prior art, the application has the advantages of less energy demand, flexible impact time point adjustment, stable control effect, automatic device energy supply and the like, can be used for coping with complex external excitation, and better impact damping effect is achieved.

Description

Technical Field

[0001] This invention belongs to the field of vibration control technology for marine engineering structures, and in particular relates to a longitudinal and transverse coupling control device for a floating wind turbine. Background Technology

[0002] In recent years, offshore wind power projects have developed rapidly. Compared with stationary wind turbines in shallow water, floating wind turbines in deep water (60-900m) have higher environmental wind speeds and higher wind energy utilization efficiency. However, under the coupled effects of wind and waves, the structure is more prone to swaying motion, affecting production safety and reducing production efficiency. To effectively control the swaying motion of floating wind turbines and reduce the pitch-roll coupled vibration response of offshore floating wind turbines under the coupled effects of wind and waves, corresponding control measures are needed, such as turbine self-control and additional vibration control devices. Among these, turbine control can easily reduce the fatigue life of the equipment and produce unfavorable negative damping effects. Traditional vibration control devices, such as tuned mass dampers (TMDs), have drawbacks such as narrow damping bandwidth, poor robustness, and limited service life of damping elements. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a floating wind turbine pitch-and-roll coupling control device.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A floating wind turbine pitch-and-roll coupling control device includes a housing and a magnetic levitation layer, an electromagnetic layer, an impact layer, a motion layer, and an equipment cavity installed inside the housing. The magnetic levitation layer is fixed to the bottom of the housing and provides magnetic levitation force to the impact block in the motion layer. The impact layer is installed at the bottom of the electromagnetic layer, and a fixed magnet is provided on the outside of the impact layer. A monitoring and control mechanism is installed inside the equipment cavity. The impact block is regulated by the magnetic levitation layer, the electromagnetic layer, and the monitoring and control mechanism to achieve suspension and impact collision in the motion layer between the impact layer and the magnetic levitation layer.

[0006] Furthermore, the transverse cross-section of the enclosure is designed as a centrally symmetrical shape, and the enclosure is made of a sealed material resistant to electromagnetic interference. Preferably, the transverse cross-section of the enclosure is circular.

[0007] Furthermore, the planar dimensions of the impact layer are smaller than those of the electromagnetic layer.

[0008] Furthermore, a ring of fixed magnets with a circular cross-section is provided on the outer side of the impact layer.

[0009] Furthermore, the impact layer is made of piezoelectric ceramic, and a cushioning material is provided at the bottom of the impact layer.

[0010] Furthermore, the electromagnetic layer is provided with an equally spaced array of excitation coils for attracting the impact block to move toward the top of the device.

[0011] Furthermore, the impact block includes a first impact block and a second impact block. The first impact block can be suspended in the motion layer through the magnetic levitation layer, and the second impact block can be attracted by a fixed magnet.

[0012] Furthermore, a cavity for installing power supply lines is provided between the electromagnetic layer and the top of the box.

[0013] Furthermore, an energy harvester for storing electrical energy is installed inside the device cavity, and the energy harvester is electrically connected to the impact layer.

[0014] Furthermore, the monitoring and control mechanism includes a first monitoring and control mechanism and a second monitoring and control mechanism, which are electrically connected to the excitation coil.

[0015] This invention also provides an application of a floating wind turbine pitch-roll coupling control device in the field of vibration control for marine engineering structures.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The pitch-roll coupling control device of the present invention enables the impact block to collide horizontally and vertically within the motion layer through the regulation of the magnetic levitation layer, the electromagnetic layer and the monitoring and control mechanism. Through nonlinear collision with the controlled main structure, effective momentum exchange and energy dissipation between the impact block and the main structure can be achieved, thereby achieving a sufficient vibration reduction effect and reducing the pitch-roll coupling vibration response of the offshore floating wind turbine under the coupling effect of wind, waves and other factors.

[0018] (2) This invention utilizes a semi-active vibration control method, which provides greater flexibility and adjustability in impact damping, allowing for real-time adjustment and response based on changes in external excitation. By leveraging the structure's own swaying motion to drive the movement of the added mass within the vibration control device, controllable impact is achieved with minimal energy input. This adapts to changes in external excitation characteristics and the structure's own features, offering a wider damping frequency band and higher control stability, thus overcoming the shortcomings of traditional tuned mass dampers, such as non-adjustability and poor robustness. Therefore, this invention offers advantages such as low energy demand, flexible adjustment of the impact timing, stable control effect, and automatic power supply, making it suitable for handling complex external excitations and achieving better impact damping effects.

[0019] (3) This invention utilizes impact damping to achieve nonlinear vibration reduction. Compared with traditional tuned mass dampers, the working stroke of the control device is reduced, thereby effectively solving the problem of limited installation space for floating wind turbine vibration reduction devices. Compared with wind turbine control, it can effectively reduce the fatigue damage of the wind turbine itself and avoid negative damping effect.

[0020] (4) By setting up multi-level impact blocks, the present invention achieves graded control of structural vibration of different amplitudes, thereby improving control efficiency and reliability; by setting up an energy harvester, the device can be self-powered after startup, thereby reducing energy supply costs.

[0021] (5) This invention combines nonlinear impact damping and semi-active control technology to effectively utilize the kinetic energy of the structure itself. By monitoring the relative motion between the internal additional mass and the controlled structure, the magnitude of the magnetic field is adjusted to change the motion direction of the additional mass, thereby realizing an efficient vibration reduction path from external monitoring to internal optimal impact control. It can also take into account the input angle changes of excitations such as wind and waves, and realize pitch-roll coupling control, which improves control efficiency and stability while reducing the working stroke.

[0022] (6) This invention can simultaneously control the pitch and roll vibrations of floating wind turbines without requiring the installation design of multi-directional stiffness systems such as springs. It is not limited by service life and facilitates installation and maintenance. Therefore, this invention has a wide range of applications, not only applicable to the top of wind turbines on offshore floating platforms such as tension legs, barges, monopole, and semi-submersible platforms, but also to the bottom of floating platforms, to achieve sway vibration control of floating wind turbines. Furthermore, this invention has high reliability and durability, and can operate under harsh environmental conditions such as high temperature, low temperature, and humidity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the internal structure of a floating wind turbine pitch-and-roll coupling control device according to the present invention.

[0024] Figure 2 This is a cross-sectional view of section AA of a floating wind turbine longitudinal and transverse roll coupling control device according to the present invention.

[0025] Figure 3 This is a cross-sectional view of section BB of a floating wind turbine longitudinal and transverse roll coupling control device according to the present invention.

[0026] Figure 4 This is a schematic diagram of the impact path of the moving layer of the longitudinal and transverse roll coupling control device for a floating wind turbine according to the present invention.

[0027] Explanation of the reference numerals in the figure:

[0028] 1-Box body, 2-Magnetic levitation layer, 3-Electromagnetic layer, 4-Impact layer, 5-Motion layer, 6-Equipment cavity, 7-Excitation coil, 8-Impact block, 8a-First impact block, 8b-Second impact block, 9-Energy harvester, 10-Monitoring and control mechanism, 10a-First monitoring and control mechanism, 10b-Second monitoring and control mechanism, 11-Cavity body, 12-Fixed magnet. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0030] Example 1:

[0031] Example 1 provides a floating wind turbine pitch-and-roll coupling control device, including a housing 1 and a magnetic levitation layer 2, an electromagnetic layer 3, an impact layer 4, a motion layer 5, and an equipment cavity 6 installed inside the housing 1. The magnetic levitation layer 2 is fixed to the bottom of the housing 1 and provides magnetic levitation force to the impact block 8 in the motion layer 5. The impact layer 4 is installed at the bottom of the electromagnetic layer 3, and a fixing magnet 12 is provided on the outside of the impact layer 4. A monitoring and control mechanism 10 is installed inside the equipment cavity 6. The impact block 8, controlled by the magnetic levitation layer 2, the electromagnetic layer 3, and the monitoring and control mechanism 10, can achieve levitation and impact collision within the motion layer 5 between the impact layer 4 and the magnetic levitation layer 2.

[0032] Example 2:

[0033] Example 2 provides a floating wind turbine pitch and roll coupling control device, such as Figure 1 As shown, it includes a housing 1 and a magnetic levitation layer 2, an electromagnetic layer 3, an impact layer 4, a motion layer 5, and an equipment cavity 6 installed inside the housing 1.

[0034] In this embodiment, the motion layer 5 is provided with impact blocks 8, specifically including a first impact block 8a and a second impact block 8b. Both the first impact block 8a and the second impact block 8b are permanent magnets to achieve multi-level vibration reduction control. When the structural swing amplitude is small, only the first impact block 8a works; when the structural swing amplitude is too large, the first impact block 8a and the second impact block 8b work together.

[0035] The housing 1 is made of sealed graphene foam material that resists electromagnetic interference, preventing external magnetic fields from negatively impacting the vibration damping device and ensuring the stability and accurate adjustment of the internal magnetic field. The transverse cross-section of the housing 1 is circular. The magnetic levitation layer 2 is made of cylindrical magnets and fixed to the bottom inside the housing 1. The magnetic levitation layer 2 provides magnetic levitation force to the impact block 8, enabling the first impact block 8a to suspend in the middle position of the Z direction of the motion layer 5, allowing it to slide freely along the XY plane of the device when the electromagnetic layer 3 is not in operation. A cavity 11 for installing power supply lines is provided between the electromagnetic layer 3 and the top of the housing 1. Excitation coils 7 (e.g., ...) are arranged in an equally spaced array inside the electromagnetic layer 3. Figure 2 As shown in the figure, it is used to attract the impact block 8 to move towards the top of the device, so that the movement trajectory of the impact block 8 changes from a straight line to a curve, so that the vibration damping device and the controlled structure can generate effective momentum exchange, causing the structure to move towards its equilibrium position.

[0036] The impact layer 4 is installed at the bottom of the electromagnetic layer 3, and a ring of fixed magnets 12 with a circular cross-section is arranged on the outer side of the impact layer 4 (e.g., Figure 3 (As shown). The impact layer 4 is made of piezoelectric ceramic, and a thin layer of rubber cushioning material is placed at the bottom of the impact layer 4. The planar dimensions of the impact layer 4 are smaller than those of the electromagnetic layer 3, and a ring of fixed magnets 12 with a circular cross-section is placed on the outer side of the impact layer 4. In the initial state without external excitation, the first impact block 8a can be suspended in the motion layer 5 through the magnetic levitation layer 2, and the second impact block 8b can be attracted by the fixed magnet 12. The mass of the second impact block 8b is less than that of the first impact block 8a.

[0037] An energy harvester 9 and a monitoring and control mechanism 10 are installed inside the equipment cavity 6. The energy harvester 9 stores a certain amount of electricity during the initial installation of the device for startup. The energy harvester 9 is wired to the impact layer 4 via the cavity 13 and the electromagnetic layer 3, and is used to collect the electrical energy converted by the piezoelectric ceramics of the impact layer 4 during collisions. The monitoring and control mechanism 10 includes a first monitoring and control mechanism 10a and a second monitoring and control mechanism 10b. The first monitoring and control mechanism 10a and the second monitoring and control mechanism 10b are respectively arranged along the X and Y directions of the main structure plane to avoid the first impact block 8a and the second impact block 8b being in a monitoring blind zone during movement, thereby monitoring the displacement, velocity, and other motion data of the main structure and the first impact block 8a. The monitoring and control mechanism 10 is wired to the excitation coil 7 via the cavity 13, and controls the working state of the excitation coil 7 through a circuit.

[0038] The working principle of this embodiment is as follows:

[0039] The floating wind turbine pitch-and-roll coupling control device of this embodiment is fixed to the offshore floating wind turbine structure. When the wind turbine structure sways under the coupling effect of wind, waves, etc., the first impact block 8a moves in the same direction due to inertia. The monitoring and control mechanism is an integrated mechanism. The internal monitoring part of the first monitoring and control mechanism 10a consists of sensors that can collect the displacement, velocity, and acceleration of the main structure, the first impact block 8a, and the second impact block 8b, respectively. The mass of the second impact block 8b is smaller than that of the first impact block 8a. The second monitoring and control mechanism 10b is a supplementary mechanism to the first monitoring and control mechanism 10a. It is only used to collect the displacement, velocity, and acceleration of the first impact block 8a and the second impact block 8b. Its purpose is to supplement the collection of motion information when the first impact block 8a and the second impact block 8b are in the monitoring blind zone of the first monitoring and control mechanism 10a (when the first monitoring and control mechanism 10a, the first impact block 8a, and the second impact block 8b are on the same straight line). When the monitoring and control mechanism 10 detects the swaying amplitude caused by external excitation, it activates the excitation coil 7. The magnetic field generated by the excitation coil 7 attracts the first impact block 8a to move towards the top of the device. The trajectory of the first impact block 8a changes from a straight line to a curve, colliding with the impact layer 4. This generates an upward collision force on the side of the controlled structure that has descended due to the swaying motion, causing the structure to move towards its equilibrium position. The vibration control device and the controlled structure exchange momentum effectively, achieving the effect of controlling the swaying motion of the structure. When the direction of the excitation input structure, such as wind or waves, changes, the first impact block 8a can move in the corresponding direction according to the structural response, thereby achieving the effect of pitch-roll coupling control.

[0040] When a collision occurs, the piezoelectric ceramics of the impact layer 4 begin to function, converting energy into electrical energy and storing it in the energy harvester 9. After the impact ends, the current in the excitation coil 7 gradually decreases to zero, the first impact block 8a separates from the impact layer 4, returns to its position in the middle of the motion layer 5, and moves in the opposite direction with the main structure to carry out the next impact.

[0041] When the monitoring and control mechanism 10 detects that the sway amplitude of the structure is too large, it adjusts the excitation coil 7 at the top of the fixed magnet 12 through the circuit, causing the second impact block 8b, which was originally attached to the fixed magnet 12, to be released to the middle of the moving layer 5, where it works in conjunction with the first impact block 8a to improve the impact damping effect. When the sway amplitude of the structure decreases, the circuit adjusts the excitation coil 7, causing the second impact block 8b to move to the position of the fixed magnet 12 and attach to the bottom of the fixed magnet 12, restoring the state where only the first impact block 8a is working.

[0042] Example 3:

[0043] Example 3 provides a floating wind turbine pitch-and-roll coupling control device. The difference from Example 2 is that the monitoring and control mechanism 10 in this example is equipped with an optimized control program. Other structures are the same as in Example 2.

[0044] The working principle of this embodiment is as follows:

[0045] This embodiment of a floating wind turbine pitch and roll coupling control device is fixed to the offshore floating wind turbine structure. When the wind turbine structure sways under the coupling effects of wind, waves, etc., the coupling control device can provide a restoring force to the structure to swing back to its equilibrium position through impact, and dissipate the kinetic energy absorbed by the structure through impact damping, thus achieving effective momentum exchange and energy dissipation. To maximize the impact effect of the coupling control device, the optimal impact principle of the coupling control device is: the impact block 8 generates an impact when the kinetic energy is at its maximum, and the direction of the impact force is opposite to the swing direction of the main structure.

[0046] The first impact block 8a inside the device moves under the action of inertia. Figure 4 One possible motion scenario is presented: the structure swings counterclockwise and clockwise around the Y-axis. In this case, the first impact block 8a moves parallel to the device and downwards to the left. The first monitoring and control mechanism 10a and the second monitoring and control mechanism 10b collect the motion information of the main structure and the first impact block 8a in real time and calculate and determine the optimal impact point. Specifically, based on the displacement, velocity, and acceleration information of the main structure, the time t1 for the structure to reach the maximum swing amplitude (swing velocity is zero) is calculated; based on the current displacement, velocity, and acceleration information of the first impact block 8a, the predicted displacement x1 of the first impact block 8a within time t1 is calculated. This prediction process needs to take into account the influence time of the magnetic field generated by the excitation coil 7 on the motion of the first impact block 8a.

[0047] The optimal impact point is determined by the predicted displacement x1. When the first impact block 8a approaches the optimal impact point, the excitation coil 7 between the first impact block 8a and the optimal impact point is activated, generating a magnetic field that attracts the first impact block 8a to move towards the top of the device. The trajectory of the first impact block 8a changes from a straight line to a curve, colliding with the impact layer 4 and generating an upward-left collision force on the left side of the controlled structure, causing the structure to move towards its equilibrium position. The vibration control device and the controlled structure exchange momentum effectively, achieving the control effect of the structure's swaying motion. When the direction of the excitation input structure, such as wind or waves, changes, the first impact block 8a can move in the corresponding direction according to the structural response, thereby achieving the effect of pitch-roll coupling control.

[0048] When a collision occurs, the piezoelectric ceramics of the impact layer 4 begin to function, converting energy into electrical energy and storing it in the energy harvester 9. After the impact ends, the current in the excitation coil 7 gradually decreases to zero, the first impact block 8a separates from the impact layer 4, its Z-direction position returns to the middle of the moving layer 5, and it moves in the opposite direction with the structure to carry out the next impact.

[0049] When the first monitoring and control mechanism 10a and the second monitoring and control mechanism 10b detect that the sway amplitude of the main structure is too large, and the predicted displacement x1 exceeds the size of the impact layer 4, the excitation coil 7 at the top of the second impact block 8b is adjusted by the circuit, so that the second impact block 8b is released to the middle of the moving layer 5 along the Z direction, and works in conjunction with the first impact block 8a to improve the impact damping effect. When the sway amplitude of the structure decreases, the circuit adjusts the second impact block 8b to move to the position of the fixed magnet 12 so that it is attracted to the bottom, restoring the state where only the first impact block 8a is working.

[0050] Example 4:

[0051] This embodiment of a floating wind turbine pitch-and-roll coupling control device includes a housing 1 and a magnetic levitation layer 2, an electromagnetic layer 3, an impact layer 4, a motion layer 5, and an equipment cavity 6 installed inside the housing 1. The magnetic levitation layer 2 is made of cylindrical magnets and fixed to the bottom of the housing 1. The electromagnetic layer 3 contains multiple excitation coils 7 distributed in the XY plane, installed at the top of the housing 1, with a cavity 11 between it and the inner wall of the housing 1. The impact layer 4 is installed at the bottom of the electromagnetic layer 3 and is made of piezoelectric ceramic. The motion layer 5 has a first impact block 8a and a second impact block 8b. The equipment cavity 6 is located on the outermost side of the housing 1 and houses an energy harvester 9 and a monitoring and control mechanism 10.

[0052] like Figure 1 As shown, in this embodiment, the transverse cross-section of the housing 1 is set to circular according to the installation requirements and usage environment. The housing 1 is made of graphene foam material with excellent electromagnetic isolation performance and high durability, which prevents external magnetic fields from having a negative impact on the vibration damping device, so that the magnetic field inside the vibration damping device can remain stable and be accurately adjusted.

[0053] The magnetic force setting principle of the magnetic levitation layer 2 is to enable the impact block 8 to be suspended in the middle position of the motion layer 5Z direction, so that it can slide freely without friction along the XY plane of the device when the electromagnetic layer 3 is not working.

[0054] The excitation coils 7 within the electromagnetic layer 3 are arranged at equal intervals, such as... Figure 2 As shown, the spacing depends on the accuracy of the impact control. The circuit of each excitation coil 7 is controlled separately. The circuit of the excitation coil 7 is connected to the circuit of the energy harvester 9 in the equipment cavity 6 and the circuit of the monitoring and control mechanism 10 through the cavity 11.

[0055] The piezoelectric ceramic circuitry of impact layer 4 is connected to the circuitry of energy harvester 9 via cavity 11, and a thin layer of rubber cushioning material is placed at the bottom of the piezoelectric ceramic. The planar dimensions of impact layer 4 are smaller than those of electromagnetic layer 3; a ring of fixing magnets 12 is arranged on the outer side of impact layer 4, such as... Figure 3 As shown, its magnetic setting principle is: to be able to attract the second impact block 8b to its bottom.

[0056] The first impact block 8a and the second impact block 8b in the motion layer 5 are both magnets. The first impact block 8a is initially suspended in the middle of the motion layer 5, and the second impact block 8b is initially attached to the bottom of the fixed magnet 12.

[0057] The energy harvester 9 needs to store a certain amount of electricity during the initial installation of the device for startup.

[0058] The first monitoring and control mechanism 10a and the second monitoring and control mechanism 10b are respectively set along the X and Y directions of the structural plane to avoid the first impact block 8a and the second impact block 8b being in the monitoring blind zone during the movement, so as to monitor the motion data such as displacement, velocity, and acceleration of the impact block 8, calculate the optimal impact point, and control the working state of the excitation coil 7 through the circuit.

[0059] The working principle of this embodiment is as follows:

[0060] This embodiment of a floating wind turbine pitch-and-roll coupling control device is fixed to the offshore floating wind turbine structure. When the wind turbine structure sways under the coupling effects of wind and waves, the coupling control device can provide a restoring force to the structure to swing back to its equilibrium position through impact, and dissipate the kinetic energy absorbed by the structure through impact damping, thus achieving effective momentum exchange and energy dissipation. To maximize the impact effect of the coupling control device, the optimal impact principle of the coupling control device is: the impact block 8 generates an impact when the kinetic energy is at its maximum, and the direction of the impact force is opposite to the swing direction of the main structure.

[0061] The first impact block 8a inside the device moves under the action of inertia. Figure 4 One possible motion scenario is presented: the structure swings counterclockwise and clockwise around the Y-axis. In this case, the first impact block 8a moves parallel to the device and downwards to the left. Monitoring and control mechanisms 10a and 10b collect the motion information of the structure and the first impact block 8a in real time and calculate and determine the optimal impact point. Specifically, based on the displacement, velocity, and acceleration information of the structure's swing, the time t1 when the structure reaches its maximum swing amplitude (swing velocity is zero) is calculated; based on the current displacement, velocity, and acceleration information of the first impact block 8a, the predicted displacement x1 of the first impact block 8a within time t1 is calculated. This prediction process needs to take into account the influence time of the magnetic field generated by the excitation coil 7 on the motion of the first impact block 8a.

[0062] The optimal impact point is determined by the predicted displacement x1. When the first impact block 8a approaches the optimal impact point, the excitation coil 7 between the first impact block 8a and the optimal impact point is activated, generating a magnetic field that attracts the first impact block 8a to move towards the top of the device. The trajectory of the first impact block 8a changes from a straight line to a curve, colliding with the impact layer 4 and generating an upward-left collision force on the left side of the controlled structure, causing the structure to move towards its equilibrium position. The vibration control device and the controlled structure exchange momentum effectively, achieving the control effect of the structure's swaying motion. When the direction of the excitation input structure, such as wind or waves, changes, the first impact block 8a can move in the corresponding direction according to the structural response, thereby achieving the effect of pitch-roll coupling control.

[0063] When a collision occurs, the piezoelectric ceramics of the impact layer 4 begin to function, converting energy into electrical energy and storing it in the energy harvester 9. After the impact ends, the current in the excitation coil gradually decreases to zero, the first impact block 8a separates from the impact layer 4, its Z-direction position returns to the middle of the moving layer 5, and it moves in the opposite direction with the structure to undergo the next impact.

[0064] When monitoring and control mechanisms 10a and 10b detect excessive sway amplitude of the structure and predict that the displacement x1 exceeds the size of the impact layer 4, the excitation coil 7 at the top of the second impact block 8b is adjusted by the circuit to release the second impact block 8b to the middle of the moving layer 5 along the Z direction, where it works in conjunction with the first impact block 8a to improve the impact damping effect. When the sway amplitude of the structure decreases, the circuit adjusts the second impact block 8b to move to the position of the fixed magnet 12 so that it is attracted to the bottom, restoring the state where only the first impact block 8a is working.

[0065] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A floating wind turbine pitch-and-roll coupling control device, characterized in that, Includes a housing (1) and a magnetic levitation layer (2), an electromagnetic layer (3), an impact layer (4), a motion layer (5), an equipment cavity (6), an excitation coil (7), and an impact block (8) installed inside the housing (1); The magnetic levitation layer (2) is fixed to the bottom of the box (1), and the electromagnetic layer (3) is arranged in an equally spaced array of excitation coils (7) for attracting the impact block (8). The impact layer (4) is installed at the bottom of the electromagnetic layer (3), and a fixed magnet (12) is provided on its outer side; the impact layer (4) is made of piezoelectric ceramic, and an energy collector (9) for storing electrical energy is installed in the equipment cavity (6), and the energy collector (9) is electrically connected to the impact layer (4); The impact block (8) includes a first impact block (8a) and a second impact block (8b), the mass of the second impact block (8b) is less than that of the first impact block (8a); the initial state of the first impact block (8a) is that it is suspended in the middle of the motion layer (5) through the magnetic levitation layer (2), and the initial state of the second impact block (8b) is that it is adsorbed on the bottom of the fixed magnet (12). The monitoring and control mechanism (10) is installed inside the equipment cavity (6). The impact block (8) is regulated by the magnetic levitation layer (2), the electromagnetic layer (3) and the monitoring and control mechanism (10) to achieve suspension and impact collision in the motion layer (5) between the impact layer (4) and the magnetic levitation layer (2). Specifically: When the monitoring and control mechanism (10) detects the swing amplitude caused by the external excitation, it starts the excitation coil (7). The magnetic field generated by the excitation coil (7) attracts the first impact block (8a) to move towards the top of the device and collide with the impact layer (4), causing the controlled structure to move towards its equilibrium position. When the direction of the excitation input structure changes, the first impact block (8a) moves in the corresponding direction as the structure responds. When the collision occurs, the impact layer (4) converts energy into electrical energy and stores it in the energy collector (9). After the impact ends, the current in the excitation coil (7) decreases to zero, the first impact block (8a) separates from the impact layer (4), and its position returns to the middle of the motion layer (5) for the next impact. When the monitoring and control mechanism (10) detects that the swing amplitude of the structure is too large, it adjusts the excitation coil (7) at the top of the fixed magnet (12) through the circuit, so that the second impact block (8b) adsorbed on the fixed magnet (12) is released to the middle of the moving layer (5) and works together with the first impact block (8a); when the swing amplitude of the structure decreases, the circuit adjusts the excitation coil (7), so that the second impact block (8b) is re-adsorbed at the bottom of the fixed magnet (12), and the state of only the first impact block (8a) working is restored.

2. The floating wind turbine pitch-and-roll coupling control device according to claim 1, characterized in that, The transverse cross section of the box (1) is set as a centrally symmetrical figure, and the box (1) is made of a material that is resistant to electromagnetic interference.

3. The floating wind turbine pitch-and-roll coupling control device according to claim 1, characterized in that, The planar dimensions of the impact layer (4) are smaller than those of the electromagnetic layer (3), and a ring of fixed magnets (12) with a circular cross-section is provided on the outer side of the impact layer (4).

4. The floating wind turbine pitch-and-roll coupling control device according to claim 1, characterized in that, The bottom of the impact layer (4) is provided with a cushioning material.

5. The floating wind turbine pitch-and-roll coupling control device according to claim 1, characterized in that, A cavity (11) for installing power supply lines is provided between the electromagnetic layer (3) and the top of the box (1).

6. The floating wind turbine pitch-and-roll coupling control device according to claim 1, characterized in that, The monitoring and control mechanism (10) includes a first monitoring and control mechanism (10a) and a second monitoring and control mechanism (10b), and the monitoring and control mechanism (10) is electrically connected to the excitation coil (7).

7. The application of a floating wind turbine pitch-roll coupling control device as described in any one of claims 1-6 in the field of vibration control of marine engineering structures.

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