Vibration reduction system and method

Abstract

The invention relates to a vibration reduction system and method. The system comprises a bottom plate, a top plate and a magnetic negative stiffness adjusting assembly, wherein the bottom plate and the top plate are oppositely arranged at an interval; the magnetic negative stiffness adjusting assembly comprises a magnetic negative stiffness mechanism, a first displacement sensor, a driving mechanism and a controller; wherein the magnetic negative stiffness mechanism and the top plate are fixedly arranged, and the magnetic negative stiffness mechanism comprises a first magnet and a second magnet which are oppositely arranged; the first displacement sensor is used for acquiring the relative movement distance between the bottom plate and the top plate; the controller is in signal connection with the first displacement sensor and the driving mechanism and used for generating a magnet distance adjusting instruction according to the relative movement distance, and the magnet distance is the distance between a first magnet and a second magnet of the magnetic negative stiffness mechanism; and the driving mechanism is connected with a second magnet in the magnetic negative stiffness mechanism and is used for correspondingly adjusting the second magnet to a target position according to the magnet distance adjusting instruction so as to adjust the magnet distance and the magnetic negative stiffness of the vibration reduction system.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and specifically to a vibration reduction system and method. Background Technology

[0002] In modern industry and transportation, vibration control technology has become an important means to ensure equipment operational stability, extend equipment lifespan, and improve the working environment. Traditional vibration reduction technology mainly relies on passive vibration damping devices, such as rubber pads, springs, and hydraulic dampers. These devices absorb or dissipate vibration energy through mechanical structures, mitigating the negative impacts of vibration to a certain extent.

[0003] However, in fields such as high-precision manufacturing, aerospace, and precision instruments, higher demands are placed on the real-time performance and intelligence of vibration control systems, leading to the development of high-performance active vibration damping control systems. Compared to traditional passive vibration damping methods, high-performance active vibration damping control systems offer greater flexibility and adaptability, making them particularly suitable for complex and variable vibration environments. However, the magnetic negative stiffness of existing high-performance active vibration damping control systems is pre-adjusted and remains constant during operation. In contrast, vibration damping systems experience displacement changes during operation, and environmental factors also play a role, resulting in varying magnetic negative stiffness requirements at different stages of operation.

[0004] Therefore, existing technologies have the problem of not being able to adaptively adjust the magnetic negative stiffness according to the needs of the vibration reduction system. Summary of the Invention

[0005] This invention provides a vibration reduction system and method, aiming to solve the problem in the prior art that the magnetic negative stiffness cannot be adaptively adjusted according to the needs of the vibration reduction system.

[0006] To address the aforementioned technical problems, the embodiments of the present invention provide the following technical solutions: A vibration reduction system includes a base plate and a top plate arranged at relative intervals, and a magnetic negative stiffness adjustment component disposed between the base plate and the top plate; The magnetic negative stiffness adjustment assembly includes a magnetic negative stiffness mechanism, a first displacement sensor, a drive mechanism, and a controller; The magnetic negative stiffness mechanism includes a first magnet and a second magnet arranged opposite to each other, and the first magnet is fixedly arranged with the top plate. The first displacement sensor is fixedly mounted on the base plate or the top plate, and is used to obtain the relative movement distance between the base plate and the top plate; The controller is connected to the first displacement sensor and the drive mechanism respectively, and is used to generate a magnet spacing adjustment command according to the relative movement distance. The magnet spacing is the distance between the first magnet and the second magnet of the magnetic negative stiffness mechanism. The drive mechanism is connected to the second magnet and is used to adjust the second magnet to the target position according to the magnet spacing adjustment command.

[0007] Optionally, the drive mechanism includes a drive motor and a nut assembly, the nut assembly being connected to the second magnet; The drive motor is used to drive the nut assembly to rotate according to the magnet spacing adjustment command, so as to adjust the second magnet to the target position.

[0008] Optionally, the nut assembly further includes scale lines, which are used to mark the nut protrusion dimensions corresponding to different magnetic negative stiffness requirements.

[0009] Optionally, the vibration reduction system further includes a second displacement sensor for acquiring the real-time distance between the first magnet and the second magnet; The controller is also used to adjust the initial magnet spacing adjustment command according to the real-time distance to obtain the adjusted magnet spacing adjustment command.

[0010] Optionally, the vibration damping system further includes an alarm; the magnetic negative stiffness mechanism further includes a connecting line, which is connected to the first magnet and the second magnet respectively, for marking the maximum distance between the first magnet and the second magnet; The controller is also used to generate an alarm signal and send it to the alarm when the connection line breaks; The connecting line is not extendable.

[0011] Optionally, the vibration damping system further includes a temperature sensor and an alarm for acquiring the operating temperature of the drive mechanism; The controller is also used to generate a high temperature warning signal and send it to the alarm when the operating temperature is greater than a preset temperature threshold.

[0012] A vibration reduction method, comprising: Obtain the relative movement distance between the base plate and the top plate of the vibration damping system; Generate magnet spacing adjustment instructions based on the relative movement distance; According to the magnet spacing adjustment command, the second magnet of the magnetic negative stiffness mechanism is adjusted to the target position to adjust the spacing between the first magnet and the second magnet and the magnetic negative stiffness of the vibration reduction system.

[0013] Optionally, the magnet spacing adjustment command includes a spacing increase command and a spacing decrease command; generating the magnet spacing adjustment command based on the relative movement distance includes: When the relative movement distance reaches a preset threshold, the vibration damping system is determined to be in the floating stage, and the spacing increase command is generated. When the relative movement distance does not reach the preset threshold, the vibration reduction system is determined to be in the post-floating vibration reduction stage, and the spacing reduction command is generated.

[0014] Optionally, before adjusting the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command, so as to adjust the spacing between the first magnet and the second magnet and the magnetic negative stiffness of the vibration damping system, the method further includes: Obtain the support leg stiffness calibration command, which is used to uniformly calibrate the stiffness of the vibration reduction system; Based on the support leg stiffness calibration command, adjust the magnetic negative stiffness of all support legs of the vibration reduction system to the standard stiffness value.

[0015] Optionally, adjusting the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command includes: The target spacing value is determined according to the magnet spacing adjustment command, wherein the target spacing value is the theoretical optimal spacing between the first magnet and the second magnet calculated based on the magnet spacing adjustment command; The target position is determined based on the target spacing value, and the first magnet is adjusted to the target position.

[0016] The beneficial effects of this application are as follows: the relative movement distance, i.e. the vibration state of the vibration damping system, is detected in real time by the first displacement sensor. The controller generates a magnet spacing adjustment command based on the relative movement distance signal, thereby enabling the drive mechanism to respond quickly and accurately adjust the spacing between the first magnet and the second magnet according to the magnet spacing adjustment command. Since the spacing between the first magnet and the second magnet is directly related to the magnetic negative stiffness of the magnetic negative stiffness mechanism, and the magnetic negative stiffness of the magnetic negative stiffness mechanism is directly related to the magnetic negative stiffness of the vibration damping system, this invention can realize the dynamic adjustment of the magnetic negative stiffness of the vibration damping system. Attached Figure Description

[0017] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the vibration reduction system provided in this application; Figure 2 This is a front view structural schematic diagram of an embodiment of the vibration reduction system provided in this application; Figure 3 This is a schematic flowchart of one embodiment of the vibration reduction method provided by the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0024] The following detailed description is based on specific embodiments. It should be noted that the sequence numbers of the following embodiments are not intended to limit the preferred order of the embodiments.

[0025] Please see Figures 1 to 2 , Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the vibration reduction system provided in this application. Figure 2 This is a front view structural schematic diagram of an embodiment of the vibration reduction system provided in this application. Figures 1 to 2 As shown, the vibration damping system includes a base plate 10 and a top plate 20 arranged at relative intervals, and a magnetic negative stiffness adjustment assembly 30 disposed between the base plate 10 and the top plate 20. The magnetic negative stiffness adjustment assembly 30 includes a magnetic negative stiffness mechanism 310, a first displacement sensor 320, a drive mechanism 330, and a controller (not shown). The magnetic negative stiffness mechanism 310 is fixedly disposed with the top plate 20, and includes a first magnet 311 and a second magnet 312 arranged opposite to each other. The first magnet 311 is fixedly disposed with the top plate 20, while the position of the second magnet 312 is variable. The first displacement sensor 320 is fixedly disposed. On the base plate 10 (the first displacement sensor 320 can also be fixedly mounted on the top plate 20), the relative movement distance between the base plate 10 and the top plate 20 is obtained; the controller is connected to the first displacement sensor 320 and the drive mechanism 330 respectively, and is used to generate a magnet spacing adjustment command according to the relative movement distance. The magnet spacing is the distance between the first magnet 311 and the second magnet 312 of the magnetic negative stiffness mechanism 310; the drive mechanism 330 is connected to the second magnet 312 and is used to adjust the second magnet 312 to the target position according to the magnet spacing adjustment command, so as to adjust the magnet spacing and the magnetic negative stiffness of the vibration reduction system.

[0026] It should be noted that the base plate 10 and the top plate 20 are relative concepts and can be interchanged and adjusted according to actual needs. That is, in different embodiments, the base plate 10 and the top plate 20 can refer to the same position, and this is not limited here. The displacement sensor can detect the relative movement distance between the base plate 10 and the top plate 20 in real time (i.e., the vibration state of the vibration damping system), thereby obtaining the operating status of the vibration damping system in real time and determining which operating stage the vibration damping system is in.

[0027] The controller generates magnet spacing adjustment commands based on the relative movement distance, thus enabling the generation of commands to adjust the magnetic negative stiffness according to the operating stage of the vibration reduction system.

[0028] The drive mechanism 330 responds to the magnet spacing adjustment command and drives the second magnet 312 to move to change the magnet spacing, thus realizing closed-loop feedback.

[0029] Therefore, in this embodiment, the relative movement distance, i.e. the vibration state of the vibration damping system, is detected in real time by the first displacement sensor 320. The controller generates a magnet spacing adjustment command based on the relative movement distance signal, thereby enabling the drive mechanism 330 to quickly respond to and accurately adjust the spacing between the first magnet 311 and the second magnet 312 according to the magnet spacing adjustment command. Since the spacing between the first magnet 311 and the second magnet 312 is directly related to the magnetic negative stiffness of the magnetic negative stiffness mechanism 310, and the magnetic negative stiffness of the magnetic negative stiffness mechanism 310 is directly related to the magnetic negative stiffness of the vibration damping system, the present invention can realize the dynamic adjustment of the magnetic negative stiffness of the vibration damping system.

[0030] Furthermore, magnetic negative stiffness is an equivalent negative stiffness effect generated by the interaction of magnetic fields. Its core principle is to change the magnetic field strength by adjusting the distance between magnets, so that the stiffness of the vibration reduction system exhibits a controllable negative value characteristic, thereby effectively offsetting the positive stiffness of the mechanical system, reducing the overall stiffness of the entire system and improving the vibration isolation performance.

[0031] The magnetic negative stiffness mechanism 310 adjusts the magnetic negative stiffness of the vibration damping system in real time by changing the distance between the magnets. This enables the magnetic negative stiffness to be reduced during the floating phase of the vibration damping system to increase the overall stiffness of the system and prevent floating instability. After floating, the magnetic negative stiffness is increased to reduce the natural frequency and achieve a lower vibration isolation frequency (typically below 5Hz).

[0032] It should be noted that the number and shape of the first magnet 311 are not limited here and can be adaptively adjusted according to actual needs.

[0033] The second magnet 312 is one or more magnets arranged opposite to the first magnet 311. Their number and shape are not limited here and can be adaptively adjusted according to actual needs. Furthermore, since the distance between the first magnet 311 and the second magnet 312 is related to the magnetic negative stiffness of the magnetic negative stiffness mechanism 310, the second magnet 312 can also be displaced as needed. That is, both the first magnet 311 and the second magnet 312 can adjust their positions as needed, without any limitations.

[0034] In one specific embodiment, the drive mechanism 330 includes a drive motor and a nut assembly, the nut assembly being connected to the second magnet 312; the drive motor is used to drive the nut assembly to rotate according to the magnet spacing adjustment command, so as to adjust the second magnet 312 to the target position.

[0035] It should be noted that by connecting the nut assembly to the second magnet 312, the drive motor drives the nut assembly to rotate according to the magnet spacing adjustment command, which can precisely change the position of the second magnet 312, thereby adjusting the magnet spacing.

[0036] The drive motor includes any one of the following: voice coil motor, linear motor, permanent magnet synchronous motor, and switched reluctance motor, without limitation.

[0037] Furthermore, to facilitate operators in observing and calculating the current magnet spacing, the nut assembly also includes scale lines, which are used to mark the nut protrusion dimensions corresponding to different magnetic negative stiffness requirements.

[0038] In this embodiment, the "magnetic negative stiffness requirement" and the "nut protrusion size" are directly linked by scale lines (the "nut protrusion size" may correspond to the angle / displacement of the nut assembly's rotation, thus mapping the magnet spacing). This eliminates the need for complex calculations or additional measuring tools, allowing for rapid determination of the nut assembly's adjustment parameters based on the target magnetic negative stiffness, thus shortening adjustment time. The clear scale markings prevent parameter misjudgment during adjustment, ensuring a precise correspondence between the nut protrusion size and the required magnetic negative stiffness. This guarantees the convenience and accuracy of magnetic negative stiffness adjustment, improving the stability of the vibration damping system.

[0039] In one specific embodiment, in order to detect whether the second magnet 312 has been adjusted to the target position, the vibration reduction system further includes a second displacement sensor, which is used to obtain the real-time distance between the first magnet 311 and the second magnet 312; the controller is also used to adjust the initial magnet spacing adjustment command according to the real-time distance to obtain the adjusted magnet spacing adjustment command.

[0040] It should be noted that by setting up a second displacement sensor specifically to obtain the "real-time distance" between the first magnet 311 and the second magnet 312, the core parameter affecting the interaction force between magnets (such as magnetic repulsion / magnetic attraction)—the "real-time magnet spacing"—is directly captured. The electromagnetic force between magnets (such as the Coulomb force of a permanent magnet) is usually inversely proportional to the square of the spacing; a small change in the spacing will cause a significant fluctuation in the force. The real-time magnet spacing provides the controller with "true feedback" on the current state of the magnets, avoiding spacing perception bias caused by lagging data.

[0041] The controller adjusts the "initial magnet spacing adjustment command" based on real-time distance, forming a closed-loop control logic of "detection-comparison-correction". The initial command can be based on a preset model, historical data, or open-loop calculation, and is susceptible to environmental interference (such as temperature changes causing magnet performance drift), component wear (such as support structure deformation), or vibration and shock (causing the relative displacement of the magnets to deviate from the expected value), resulting in deviations between the actual spacing and the target value. Through real-time distance feedback, the controller can dynamically correct the command, making the adjusted command more closely match the current actual spacing requirements, effectively eliminating accumulated errors, and ensuring that the magnet spacing accurately tracks the target value.

[0042] The magnet spacing is a direct parameter for controlling the magnetic negative stiffness, and its adjustment speed determines the response speed of the damping force. Therefore, in this implementation, by detecting the magnet spacing in real time, the controller can immediately sense the deviation of the magnet spacing and quickly adjust the command, thus shortening the lag time for correcting the magnetic negative stiffness.

[0043] In one specific embodiment, in order to ensure the stability of other components of the vibration damping system, the distance between the first magnet 311 and the second magnet 312 cannot be increased indefinitely. Therefore, the vibration damping system also includes an alarm. The magnetic negative stiffness mechanism 310 also includes a connecting line, which is connected to the first magnet 311 and the second magnet 312 respectively, and is used to mark the maximum distance between the first magnet 311 and the second magnet 312. The controller is also used to generate an alarm signal and send it to the alarm device when the connection cable breaks; The connecting lines must not be extended.

[0044] It should be noted that the non-extendable connecting wire connects the first magnet 311 and the second magnet 312 at both ends, and its physical characteristic (non-extendable) directly indicates the maximum allowable distance between them. When the distance between the magnets increases to this maximum distance, the connecting wire is in a taut state, which physically limits the further expansion of the distance and prevents the magnetic negative stiffness mechanism 310 from failing or the vibration reduction performance from deteriorating due to unlimited increase in distance. When the magnet distance exceeds the maximum allowable value, the non-extendable connecting wire will break due to excessive stretching. The controller detects the breakage state of the connecting wire, immediately generates an alarm signal and sends it to the alarm, realizing real-time detection and active warning of magnet distance exceeding the limit. This ensures that operators or the system can detect abnormalities in time and avoid vibration reduction system failures or safety risks caused by uncontrolled distance.

[0045] Therefore, in this embodiment, the maximum spacing between magnets is precisely limited by non-extendable connecting lines. Combined with the logic design of "breakage trigger alarm", the magnet distance is prevented from increasing indefinitely from a physical perspective, and the stable operation and safety of the vibration reduction system are ensured through real-time detection and early warning mechanisms.

[0046] In one specific embodiment, the vibration damping system further includes a temperature sensor and an alarm for acquiring the operating temperature of the drive mechanism 330; the controller is also used to generate a high temperature warning signal and send it to the alarm when the operating temperature is greater than a preset temperature threshold.

[0047] Specifically, by acquiring the operating temperature of the drive mechanism 330 in real time through a temperature sensor, and combining this with the controller's judgment of the temperature threshold, it is possible to accurately and promptly identify abnormal high-temperature conditions during motor operation (such as temperatures exceeding preset thresholds due to excessive load, poor heat dissipation, or component aging), thus preventing the risk of high temperatures from accumulating undetected.

[0048] When the operating temperature exceeds the preset threshold, the controller generates a high-temperature warning signal and sends it to the alarm. The alarm (such as sound, light or electrical signal) directly reminds the operator or the linkage system, prompting them to take timely measures such as stopping the machine for inspection and adjusting operating parameters (such as reducing load and enhancing heat dissipation). This effectively avoids irreversible damage to the motor caused by long-term high-temperature operation, such as coil burnout, magnet demagnetization or thermal deformation of mechanical parts, and protects the safety of the motor's core components.

[0049] The drive mechanism 330 is a key component of the vibration damping system, and its performance stability directly affects the damping effect. A high-temperature warning mechanism prevents the motor from failing due to overheating, thus ensuring reliable operation of the vibration damping system in scenarios requiring continuous and stable operation (such as vibration damping of precision equipment and vehicle suspension systems). This avoids secondary problems caused by system failure (such as excessive equipment vibration or precision machining errors). Timely intervention in high-temperature issues can reduce the accelerated aging or irreversible damage to components such as motor coils, magnets, and bearings caused by high temperatures, fundamentally reducing the motor failure rate. This, in turn, extends the service life of the drive mechanism 330 and even the entire vibration damping system, reducing repair or replacement costs due to equipment damage.

[0050] In summary, this embodiment achieves proactive prevention and control of the 330°C high temperature risk of the drive mechanism through closed-loop control of "temperature detection - threshold judgment - early warning triggering", effectively ensuring the safe and stable operation of the motor and vibration reduction system, while extending equipment life and reducing maintenance costs.

[0051] After obtaining the vibration reduction system, the present invention also provides a vibration reduction method, please refer to [link to relevant documentation]. Figure 3 , Figure 3 This is a schematic flowchart of an embodiment of the vibration reduction method provided by the present invention, including: S301: Obtain the relative movement distance between the bottom plate and the top plate of the vibration damping system; S302: Generate magnet spacing adjustment command based on relative movement distance; S303: Adjust the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command, so as to adjust the spacing between the first magnet and the second magnet and the magnetic negative stiffness of the vibration reduction system.

[0052] It should be noted that the relative movement distance directly reflects the actual state of vibration excitation of the vibration reduction system, such as amplitude and displacement. Therefore, generating magnet spacing adjustment commands based on the relative movement distance can effectively adapt to the needs of the actual state.

[0053] Furthermore, the core function of the magnetic negative stiffness mechanism is to provide negative stiffness through the magnetic force between magnets. Combined with positive stiffness elements (such as springs) in the system, it can achieve low or zero stiffness characteristics, reducing vibration transmission rate. In this embodiment, by dynamically adjusting the magnet spacing to change the magnetic negative stiffness, the system stiffness characteristics can always be adapted to the vibration excitation under different relative movement distances (e.g., optimizing stiffness matching to improve vibration isolation efficiency during small displacements, and adjusting the magnitude of negative stiffness to avoid excessive impact force transmission during large displacements). This significantly enhances the vibration damping system's absorption and suppression effect on vibration energy.

[0054] In summary, this embodiment achieves precise matching between the magnetic negative stiffness and the state of the vibration reduction system through closed-loop control of "system state detection - dynamic command generation - magnet spacing adjustment - magnetic negative stiffness optimization", effectively improving the vibration reduction performance, working condition adaptability and long-term reliability of the vibration reduction system.

[0055] In one specific embodiment, the magnet spacing adjustment command includes a spacing increase command and a spacing decrease command; the magnet spacing adjustment command is generated based on the relative movement distance, specifically including: when the relative movement distance reaches a preset threshold, it is determined that the vibration damping system is in the floating stage, and a spacing increase command is generated; when the relative movement distance does not reach the preset threshold, it is determined that the vibration damping system is in the post-floating vibration damping stage, and a spacing decrease command is generated.

[0056] It should be noted that during the levitation phase (when the relative movement distance reaches the threshold): at this time, the system is in the process of levitation startup or levitation. The "gap increase command" is generated to adjust the magnetic force between the magnets (such as reducing the repulsive force or attractive force) to a suitable range, so as to avoid the impact or instability caused by excessive initial magnetic force and ensure that the levitation process is smooth and without oscillation.

[0057] Vibration reduction stage after buoyancy (relative movement distance not reaching the threshold): The system has completed buoyancy, and the core requirement has shifted to suppressing vibration. Generating a "spacing reduction command" can enhance the magnetic force between magnets (such as increasing the restoring force of repulsion or attraction), improve the ability to suppress minor vibrations, accelerate vibration attenuation, and significantly improve vibration reduction efficiency.

[0058] In this embodiment, the vibration reduction system is divided into a "floating stage" and a "post-floating vibration reduction stage" by a preset threshold, and a spacing adjustment command is generated accordingly, so that the system can match the optimal control strategy in different working stages.

[0059] Furthermore, using "relative movement distance" as the criterion for stage determination enables feedback control based on the actual displacement state of the vibration reduction system, rather than fixed parameter control. Specifically, it responds in real time to the displacement changes between the top and bottom plates, ensuring that stage determination is highly matched with actual working conditions and avoiding lag or misjudgment caused by fixed control logic; it dynamically adjusts the magnet spacing, allowing the magnetic force output to be optimized in real time according to the system state, improving control accuracy and intelligence, and adapting to complex or variable vibration environments.

[0060] In summary, this embodiment achieves precise control of the vibration reduction system at different working stages through phased precise control, real-time feedback optimization, and clear logic judgment. Based on the phase judgment of relative movement distance and dynamic adjustment of magnet spacing, it realizes precise control of the vibration reduction system at different working stages, effectively improving the floating stability, vibration reduction effect, and operational reliability of the vibration reduction system. This allows the system to efficiently adapt to working conditions in both the startup (floating) and steady-state (vibration reduction) stages, demonstrating strong practicality and control advantages.

[0061] Furthermore, since the stiffness of each support leg of the vibration damping system may vary due to structural reasons, it is necessary to adjust the magnetic negative stiffness of each leg to ensure uniform stiffness and optimal system mechanical performance. Specifically, before adjusting the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command to adjust the spacing between the first and second magnets and the magnetic negative stiffness of the vibration damping system, the process includes: obtaining a support leg stiffness calibration command, which is used to uniformly calibrate the stiffness of the vibration damping system; and adjusting the magnetic negative stiffness of all support legs of the vibration damping system to the standard stiffness value based on the support leg stiffness calibration command.

[0062] It should be noted that the support leg stiffness calibration command can be entered externally or automatically generated based on certain parameters; no limitation is made here.

[0063] Preferably, the standard value of stiffness is zero to facilitate adjustment.

[0064] By "obtaining support leg stiffness calibration instructions" and "adjusting the magnetic negative stiffness of all support legs to the standard stiffness value", the individual differences in initial stiffness of each support leg caused by manufacturing errors, assembly differences, wear and tear can be eliminated, so that the magnetic negative stiffness of all support legs reaches a uniform standard state.

[0065] Once all support legs have been uniformly calibrated to the standard value, subsequent adjustments to specific magnet spacing (such as adjusting the distance between the first and second magnets to change the magnetic negative stiffness) can be made based on a consistent benchmark, reducing adjustment errors introduced by the initial stiffness dispersion. This makes the overall stiffness control of the vibration reduction system more precise and can more accurately match the target vibration reduction requirements (such as stiffness parameters under specific vibration frequencies and load conditions).

[0066] Conversely, if there are differences in the initial stiffness of the support legs, when adjusting the magnetic negative stiffness later, some support legs may have excessive or insufficient stiffness, resulting in uneven force on the vibration reduction system and local failure of the vibration suppression effect (such as some support legs being excessively deformed or having insufficient stiffness to effectively resist vibration).

[0067] Therefore, by uniformly calibrating the magnetic negative stiffness of all support legs to the standard value, the fluctuation of vibration reduction effect caused by individual differences can be eliminated from the source, so as to avoid the instability or failure of vibration reduction effect caused by the difference in initial stiffness.

[0068] A unified stiffness standard provides a clear performance benchmark for the support legs, ensuring that the vibration damping system can respond to adjustment commands based on consistent stiffness characteristics under different operating conditions (such as load changes and vibration frequency fluctuations), avoiding overall performance shortcomings caused by some support legs not meeting the standard. At the same time, standardized calibration can reduce the risk of system failure caused by stiffness dispersion, extend equipment life, and improve the environmental adaptability and long-term reliability of the vibration damping system.

[0069] In summary, this embodiment optimizes the stiffness control of the vibration reduction system from the aspects of benchmark consistency and adjustment accuracy by adopting the logic of "unified calibration first, then precise adjustment", ultimately achieving the technical goals of more stable vibration reduction effect, more precise adjustment, and more reliable system.

[0070] Further, adjusting the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command includes: determining the target spacing value according to the magnet spacing adjustment command, wherein the target spacing value is the theoretical optimal spacing between the first magnet and the second magnet calculated based on the magnet spacing adjustment command; determining the target position based on the target spacing value, and adjusting the second magnet to the target position.

[0071] It should be noted that there is a one-to-one mapping relationship between the system's operating phase state and the system's target magnetic negative stiffness. Therefore, based on this mapping relationship, after determining the magnet spacing adjustment command according to the system's operating phase state, the target magnetic negative stiffness can be directly obtained. Since the target magnetic negative stiffness is related to the magnet spacing, the required magnet spacing, i.e., the target spacing value, can be directly determined based on the system's operating phase state.

[0072] At the target spacing, the magnetic field distribution between magnets is more uniform, and the force transmission path is more in line with the design expectations. This can improve the dynamic response characteristics of the mechanism, reduce the "hysteresis effect" caused by nonlinear magnetic field interference, improve the response speed of negative stiffness force to external excitation, avoid "redundant forces" between magnets caused by unreasonable spacing (such as the waste of magnetic repulsion force caused by too close spacing, and the loss of magnetic field energy by too far spacing), reduce system energy consumption or improve energy utilization efficiency.

[0073] In this embodiment, the magnetic negative stiffness of the vibration reduction system based on the optimal spacing can more accurately offset the positive stiffness of the system, reduce the overall natural frequency, broaden the effective vibration isolation frequency band (especially the low-frequency vibration isolation effect), and improve the attenuation efficiency of external vibrations; it can also achieve dynamic balance with external loads or positive stiffness components (such as zero stiffness support), reduce static / dynamic displacement deviation, improve system stability, enhance the targeted suppression capability of vibrations at specific frequencies, and reduce the risk of resonance.

[0074] It should be noted that the vibration reduction system provided in this application embodiment, due to the inclusion of the magnetic negative stiffness adjustment component provided in this application embodiment, can achieve the beneficial effects that any vibration reduction system provided in this application embodiment can achieve, as detailed in the preceding embodiments, and will not be repeated here.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vibration reduction system, characterized in that, It includes a bottom plate and a top plate that are spaced apart from each other, and a magnetic negative stiffness adjustment assembly disposed between the bottom plate and the top plate; The magnetic negative stiffness adjustment assembly includes a magnetic negative stiffness mechanism, a first displacement sensor, a drive mechanism, and a controller; The magnetic negative stiffness mechanism includes a first magnet and a second magnet arranged opposite to each other, and the first magnet is fixedly arranged with the top plate. The first displacement sensor is fixedly mounted on the base plate or the top plate, and is used to obtain the relative movement distance between the base plate and the top plate; The controller is connected to the first displacement sensor and the drive mechanism respectively, and is used to generate a magnet spacing adjustment command according to the relative movement distance. The magnet spacing is the distance between the first magnet and the second magnet of the magnetic negative stiffness mechanism. The drive mechanism is connected to the second magnet and is used to adjust the second magnet to the target position according to the magnet spacing adjustment command.

2. The vibration reduction system according to claim 1, characterized in that, The drive mechanism includes a drive motor and a nut assembly, the nut assembly being connected to the second magnet; The drive motor is used to drive the nut assembly to rotate according to the magnet spacing adjustment command, so as to adjust the second magnet to the target position.

3. The vibration reduction system according to claim 2, characterized in that, The nut assembly also includes scale lines, which are used to mark the nut protrusion dimensions corresponding to different magnetic negative stiffness requirements.

4. The vibration reduction system according to claim 1, characterized in that, The vibration reduction system also includes a second displacement sensor for obtaining the real-time distance between the first magnet and the second magnet; The controller is also used to adjust the initial magnet spacing adjustment command according to the real-time distance to obtain the adjusted magnet spacing adjustment command.

5. The vibration reduction system according to claim 1, characterized in that, The vibration reduction system also includes an alarm; the magnetic negative stiffness mechanism also includes a connecting line, which is connected to the first magnet and the second magnet respectively, and is used to mark the maximum distance between the first magnet and the second magnet. The controller is also used to generate an alarm signal and send it to the alarm when the connection line breaks; The connecting line is not extendable.

6. The vibration reduction system according to claim 1, characterized in that, The vibration damping system also includes a temperature sensor and an alarm, used to obtain the operating temperature of the drive mechanism; The controller is also used to generate a high temperature warning signal and send it to the alarm when the operating temperature is greater than a preset temperature threshold.

7. A vibration reduction method, characterized in that, Applied to the vibration reduction system according to any one of claims 1-6, comprising: Obtain the relative movement distance between the base plate and the top plate of the vibration damping system; Generate magnet spacing adjustment instructions based on the relative movement distance; According to the magnet spacing adjustment command, the second magnet of the magnetic negative stiffness mechanism is adjusted to the target position to adjust the spacing between the first magnet and the second magnet and the magnetic negative stiffness of the vibration reduction system.

8. The vibration reduction method according to claim 7, characterized in that, The magnet spacing adjustment command includes a spacing increase command and a spacing decrease command; the step of generating the magnet spacing adjustment command based on the relative movement distance includes: When the relative movement distance reaches a preset threshold, the vibration damping system is determined to be in the floating stage, and the spacing increase command is generated. When the relative movement distance does not reach the preset threshold, the vibration reduction system is determined to be in the post-floating vibration reduction stage, and the spacing reduction command is generated.

9. The vibration reduction method according to claim 7, characterized in that, Before adjusting the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command, so as to adjust the spacing between the first magnet and the second magnet and the magnetic negative stiffness of the vibration damping system, the method further includes: Obtain the support leg stiffness calibration command, which is used to uniformly calibrate the stiffness of the vibration reduction system; Based on the support leg stiffness calibration command, adjust the magnetic negative stiffness of all support legs of the vibration reduction system to the standard stiffness value.

10. The vibration reduction method according to claim 7, characterized in that, The step of adjusting the second magnet of the magnetic negative stiffness mechanism to the target position according to the magnet spacing adjustment command includes: The target spacing value is determined according to the magnet spacing adjustment command, wherein the target spacing value is the theoretical optimal spacing between the first magnet and the second magnet calculated based on the magnet spacing adjustment command; The target position is determined based on the target spacing value, and the second magnet is adjusted to the target position.

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