Method and system for calculating and regulating vibration isolation rate of mixed magnetic shock absorber based on current driving and shock absorber

Abstract

The invention belongs to the technical field of shock absorbers, and particularly discloses a mixed magnetic shock absorber vibration isolation rate calculation and regulation method and system based on current driving and a shock absorber, and the method comprises the following steps that a permanent magnet equivalent magnetic circuit is converted into an electromagnetic vibration isolator equivalent magnetic circuit, and a physical model of the mixed magnetic shock absorber is constructed; a current-magnetic field-torque calculation formula is deduced based on an electromagnetism theory and a vibration system dynamics principle; monitoring vibration parameters in real time, obtaining a vibration isolation rate, and comparing the vibration isolation rate with a target vibration isolation rate; current is adjusted based on the comparison result of the vibration isolation rate and the target vibration isolation rate, the magnetic field rigidity and damping are dynamically changed, and the vibration isolation rate is regulated and controlled. By the adoption of the technical scheme, the precise model is constructed, intelligent current adjustment is achieved in combination with an advanced algorithm, and the vibration isolation performance, universality and reliability of the shock absorber under the complex working condition are enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of shock absorbers, and relates to a method and system for calculating and regulating the vibration isolation rate of a hybrid magnetic shock absorber driven by current, as well as a shock absorber. Background Art

[0002] In modern industrial production and scientific research, the stability and reliability of mechanical systems are crucial, and vibration problems are one of the key factors affecting their performance. From high-speed industrial equipment to precision instruments with extremely high precision requirements, and then to transportation tools with complex operating environments, the quality of vibration control directly affects the operating efficiency, service life, and product quality of the equipment.

[0003] Traditional shock absorbers come in various types. For example, common spring shock absorbers mainly rely on the elastic deformation of springs to absorb vibration energy, while rubber shock absorbers utilize the viscoelastic properties of rubber to achieve vibration reduction. However, these traditional mechanical shock absorbers have many limitations. In the face of complex and changing vibration conditions, such as rapid changes in vibration frequency and frequent occurrence of impact vibrations, their vibration reduction effects are often greatly reduced. Moreover, during long-term use, friction between mechanical components is inevitable, which not only causes mechanical wear, increases maintenance costs and downtime, but may also lead to system failures, affecting the continuity and stability of production.

[0004] With the progress of technology, magnetic shock absorbers have come into people's view. Compared with traditional mechanical shock absorbers, it has advantages such as no mechanical contact and fast response speed, which improves the vibration control performance to a certain extent. However, traditional arrays of magnetic shock absorbers have serious problems in practical applications. Due to unreasonable arrangement of magnetic blocks, magnetic leakage is prominent, a large amount of magnetic energy is wasted, and the performance of magnetic blocks cannot be fully exerted, which limits the vibration control ability and vibration isolation effect of magnetic shock absorbers.

[0005] The hybrid magnetic vibration isolator driven by current emerges with the development of electromagnetic technology and shows advantages that traditional vibration isolators cannot match. It precisely controls the magnetic field through current and can flexibly adjust the vibration isolation performance. It can quickly respond to different vibration situations, adjust the vibration isolation parameters in real time, and effectively improve the accuracy and efficiency of vibration control. In the face of a complex vibration environment, it can quickly change the magnetic field distribution and intensity by changing the magnitude and direction of the current, providing a more powerful and flexible vibration isolation force. And its non-contact working mode avoids direct friction between mechanical components, reduces wear, lowers maintenance costs, and improves the stability and service life of the equipment.

[0006] However, there are many challenges in realizing the wide application of the hybrid magnetic vibration isolator driven by current:

[0007] First, it is difficult to establish an accurate current-magnetic field-vibration isolation performance relationship model. The influence of current changes on the magnetic field distribution and the stiffness and damping characteristics of the vibration isolator is complex. Existing theories and methods have limitations in describing such multi-physical field coupling relationships and are difficult to accurately predict and optimize the performance of the vibration isolator under different working conditions.

[0008] Second, there are technical difficulties in fast and accurate current control. To enable the vibration isolator to respond in a timely manner to rapidly changing vibration conditions, it is necessary to adjust the current at high speed and with high precision. However, current control technologies and equipment currently have difficulty fully meeting the requirements in terms of response speed and control accuracy, and it is easy to have situations such as current regulation lag or insufficient accuracy, which affects the vibration isolation effect.

[0009] Third, the structural design and optimization of the hybrid magnetic vibration isolator are difficult. The traditional layout of magnets and coils often leads to uneven magnetic field distribution and low energy utilization efficiency, and it is difficult to balance the vibration isolation performance with the compactness and stability of the structure. The hybrid magnetic arrangement of the Halbach array has unique advantages. It can concentrate the magnetic field in a specific area, enhance the magnetic field intensity on one side, weaken the magnetic field on the other side, reduce magnetic leakage, improve the magnetic field uniformity and energy utilization efficiency, which helps to achieve a stronger vibration isolation effect in a limited space, make the structural design more compact and reasonable, and provide the possibility for the miniaturization and high performance of the hybrid magnetic vibration isolator.

[0010] Even when using the hybrid magnetic arrangement of the Halbach array, there are still problems in practical applications. While ensuring uniform and efficient magnetic field distribution and a compact and stable structure, it is necessary to consider the influence of environmental factors on the performance of the vibration isolator. For example, temperature changes may change the magnetism of the magnet, affecting the magnetic field intensity and distribution; humidity may cause corrosion of the magnet and coil, reducing the reliability of the equipment; complex electromagnetic interference may disrupt the normal magnetic field distribution, seriously affecting the vibration isolation effect. Therefore, how to enhance the environmental adaptability of the vibration isolator based on the hybrid magnetic arrangement of the Halbach array and make it work stably and efficiently in a complex environment has become an urgent problem to be solved. Summary of the Invention

[0011] The purpose of the present invention is to provide a method, system and shock absorber for calculating and regulating the vibration isolation rate of a hybrid magnetic shock absorber based on current drive, so as to solve the problems of poor vibration isolation rate control and weak adaptability of traditional shock absorbers under complex working conditions.

[0012] To achieve the above purpose, the basic solution of the present invention is: A method for calculating and regulating the vibration isolation rate of a hybrid magnetic shock absorber based on current drive, including the following steps:

[0013] Convert the equivalent magnetic circuit of the permanent magnet into the equivalent magnetic circuit of an electromagnetic vibration isolator to construct a physical model of the hybrid magnetic shock absorber;

[0014] Based on electromagnetic theory and the dynamic principle of the vibration system, derive the calculation formula for current-magnetic field-torque;

[0015] Real-time monitoring of vibration parameters: vibration displacement, vibration velocity, vibration acceleration, etc., obtain the vibration isolation rate and compare it with the target vibration isolation rate;

[0016] Based on the comparison result between the vibration isolation rate and the target vibration isolation rate, the current is adjusted, the magnetic field stiffness and damping are dynamically changed, and the vibration isolation rate is regulated.

[0017] The working principle and beneficial effects of this basic solution are as follows: This technical solution is based on current drive to control the hybrid magnetic vibration absorber and its vibration isolation rate. By constructing a current-magnetic field-vibration isolation performance model, the vibration isolation rate calculation method is obtained, the vibration parameters are monitored in real time, and the current is quickly adjusted after comparing the target vibration isolation rate. The magnetic field stiffness and damping are dynamically changed to accurately control the vibration isolation rate. The Halbach array is combined to optimize the magnetic field distribution and improve the control effect. This solution can significantly enhance the vibration isolation performance, versatility and reliability of the vibration absorber under complex working conditions, and provide an innovative solution for the field of vibration control.

[0018] Furthermore, based on the electromagnetic theory and the principle of vibration system dynamics, the calculation formula of current-magnetic field-torque is derived, which is:

[0019] Assume that the speed of the active rotor of the shock absorber is w1, the speed of the driven rotor is w2, and the speed difference Δw = w1-w2; according to the law of electromagnetic induction, the induced electromotive force E is related to the rate of change of the magnetic field, which can be expressed as:

[0020]

[0021] Where N is the number of coil turns, dφ is the change in magnetic flux, and dt is the change in time;

[0022] When considering the influence of current I on the magnetic field, the relationship between the magnetic field intensity H and the current I can be approximately expressed as:

[0023] H=kI

[0024] Where k is the proportional coefficient. By analyzing the relationship between the electromagnetic torque T and the speed difference Δw, we can get:

[0025] T=k T Δw

[0026] Among them, k T is the torque coefficient. At the same time, since the electromagnetic torque T is related to the magnetic field intensity B and the current I, according to the Ampere force formula, the electromagnetic torque T is expressed as:

[0027] T=k BI BI

[0028] Among them, k BI is a coefficient related to the structure. By combining them, we can deduce the relationship between the active rotor, the driven rotor, the speed difference between the two, and the current and magnetic field.

[0029] In the vibration isolation system, vibration will cause relative movement between the active rotor and the driven rotor, which will in turn lead to changes in magnetic flux. At this time, by controlling the current to adjust the magnetic field strength, the generated magnetic field force can interact with the interference force caused by vibration. According to the mechanical vibration theory, when the magnetic field force and the interference force form a dynamic balance under specific conditions, the vibration amplitude of the vibration system will be effectively suppressed.

[0030] Furthermore, through the magnetic field force formula, the magnetic field force F is calculated as follows:

[0031] F = BIL;

[0032] where L represents the length of the wire;

[0033] In the electromagnetic vibration isolator, the transmitted torque T is closely related to the magnetic field force F and the rotor radius r; according to the basic definition of torque, the calculation formula for the transmitted torque is:

[0034] T = BILr

[0035] By adjusting the input current, the magnetic field strength can be changed, which in turn affects the magnetic induction intensity. When there is a speed difference between the active rotor and the driven rotor, and the magnetic flux is related to the magnetic field strength, adjusting the magnetic field strength by changing the current will also affect the magnitude of the induced electromotive force.

[0036] When the load torque changes, by real-time monitoring the current and the operating parameters of the motor, and using the control algorithm to adjust the input current in a timely manner, the transmitted torque can quickly adapt to the change of the load and maintain the stable operation of the system.

[0037] Furthermore, the vibration isolation rate Iso_ratio is calculated as follows:

[0038] Iso_ratio = 100 - Tr

[0039] where Tr = (a p / a a * 100), Tr represents the transmission ratio, a p represents the vibration transmitted to the vibration isolation tabletop, and a a represents the vibration transmitted to the lower part of the vibration isolation system; the smaller the vibration isolation rate, the better the vibration isolation effect.

[0040] Obtaining the vibration isolation rate is convenient for use.

[0041] Furthermore, based on the comparison result of the vibration isolation rate and the target vibration isolation rate, the current is adjusted to dynamically change the magnetic field stiffness and damping, and the vibration isolation rate is regulated. The specific method is as follows:

[0042] Let the minimum allowable value of the vibration amplitude be Amin and the maximum allowable value be Amax. When the vibration amplitude is lower than Amin, it means that the shock absorber overly suppresses vibration, resulting in a decline in the dynamic response performance of the system;

[0043] When the vibration amplitude exceeds Amax, it indicates that the shock absorption effect is not good, and the working parameters of the shock absorber need to be adjusted. Specifically: by increasing or decreasing the damping coefficient of the shock absorber, adjusting the response speed of the shock absorber to make it respond to vibration faster or slower; adjusting the installation position or angle of the shock absorber, etc. to improve the poor shock absorption effect of the shock absorber;

[0044] Let the minimum value of the exciting coil current be Imin and the maximum value be Imax. When the current is lower than Imin, it may not be able to generate sufficient magnetic force and magnetic torque to achieve the shock absorption effect; when the current exceeds Imax, it may cause overheating problems;

[0045] Let the allowable range of the rotational speed difference between the driving and driven rotors be Δwmin - Δwmax. When the rotational speed difference exceeds the allowable range, adjust the current to change the magnetic field strength and adjust the rotational speed difference.

[0046] Through the adjustment mechanism, it can effectively achieve precise control of the transmitted torque by adjusting the current, improve the performance and stability of the electromagnetic vibration isolator under complex working conditions, and provide more reliable technical support for various equipment and systems that require vibration isolation and precise torque control.

[0047] The present invention also provides a vibration isolation rate calculation and regulation system for a hybrid magnetic shock absorber based on current drive, including a hybrid magnetic shock absorber and a processing module. The processing module is connected to the hybrid magnetic shock absorber, and the processing module executes the method of the present invention to calculate and regulate the vibration isolation rate of the hybrid magnetic shock absorber.

[0048] This system adjusts the current magnitude of the outer magnet to regulate the transmitted torque and electromagnetic stiffness of the magnetic coupling, realizes overload protection of the magnetic coupling, and also provides the effect of buffering and shock absorption.

[0049] The present invention also provides a hybrid magnetic shock absorber for the system of the present invention, including a driving body and a driven body. The driving body and the driven body are respectively connected by a driving shaft and an output shaft. A driving rotor is provided on the driving shaft, and a passive rotor is provided on the output shaft;

[0050] The inner magnet on the passive rotor is located inside the outer magnet, and the inner magnet and the outer magnet are aligned with each other in the radial direction. The inner magnet is composed of multiple magnetic poles, and the magnetic poles are evenly distributed in the circumferential direction of the passive rotor; both the outer magnet and the inner magnet are magnetized in the radial direction, and adjacent outer magnets have opposite magnetic pole directions, and the magnetic poles of the inner magnet are also opposite to the magnetic pole directions of the corresponding outer magnets;

[0051] A working magnetic circuit is formed between the driving rotor and the driven rotor through the magnetic field generated by the interaction between the outer magnet and the inner magnet. The outer magnet is powered by an exciting coil to generate a working magnetic field, realizing the magnetic force transmission and vibration damping functions of the system.

[0052] The hybrid magnetic damper has a simple structure. According to the rotation law, the relationship between current regulation and the rotation state of the motor can be established. When it is necessary to increase the transmission torque, the input current is increased through the microprocessor, so that the magnetic field strength increases, and the magnetic induction intensity increases accordingly; the transmission torque increases, and the angular acceleration of the motor increases, so that the driven rotor can follow the driving rotor faster, reducing the speed difference; on the contrary, when it is necessary to reduce the transmission torque, the input current is reduced, so that the magnetic field strength and the magnetic induction intensity are reduced, the transmission torque is reduced, the angular acceleration of the motor is reduced, and the speed change of the driven rotor slows down. Description of the Drawings

[0053] Figure 1 is a schematic flow chart of the vibration isolation rate calculation and regulation method of the hybrid magnetic damper based on current drive of the present invention;

[0054] Figure 2 is a schematic structural diagram of the hybrid magnetic damper of the present invention.

[0055] The reference numerals in the drawings of the specification include: driving body 1, receiving body 2, driving shaft 3, output shaft 4, driving rotor 5, driven rotor 6, outer magnet 7, inner magnet 8. Detailed Embodiments

[0056] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "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, and is only for the convenience of describing the present invention 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 of the present invention.

[0058] In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0059] The present invention discloses a method for calculating and regulating the vibration isolation rate of a hybrid magnetic shock absorber based on current drive, covering characteristic analysis and regulation mechanisms, constructing an accurate model and combining advanced algorithms to achieve intelligent current regulation. Through finite element analysis and other methods, the vibration response and vibration isolation effect of the system are evaluated and optimized, providing an efficient and reliable solution for the field of harsh vibration control, opening up new ideas for vibration control technology, and promoting the high-quality development of related industries.

[0060] As Figure 1 shown, the method for calculating and regulating the vibration isolation rate of a hybrid magnetic shock absorber based on current drive includes the following steps:

[0061] Convert the equivalent magnetic circuit of the permanent magnet into the equivalent magnetic circuit of an electromagnetic vibration isolator, and construct the physical model of the hybrid magnetic shock absorber;

[0062] Based on the theory of electromagnetism and the principle of dynamics of the vibration system, derive the calculation formula for current - magnetic field - torque;

[0063] Real - time monitor vibration parameters: vibration displacement, vibration velocity, vibration acceleration, etc., obtain the vibration isolation rate and compare it with the target vibration isolation rate; the target vibration isolation rate is usually determined according to the design requirements and expected performance of the vibration isolation system. In engineering applications, the setting of the target vibration isolation rate needs to consider the use environment of the system, load conditions, frequency response characteristics, and the expected vibration level.

[0064] Adjust the current based on the comparison result of the vibration isolation rate and the target vibration isolation rate, dynamically change the magnetic field stiffness and damping, and regulate the vibration isolation rate. The stiffness is a dynamic value and is difficult to express by a formula. After the current changes, the magnetic field strength changes, and then the overall vibration isolation performance changes, which is equivalent to the change of the magnetic field stiffness and damping.

[0065] In a preferred embodiment of the present invention, the method for converting the equivalent magnetic circuit of the permanent magnet into the equivalent magnetic circuit of an electromagnetic vibration isolator and constructing the physical model of the hybrid magnetic shock absorber is as follows:

[0066] At the electromagnetic level, first convert the equivalent magnetic circuit of the permanent magnet into the equivalent magnetic circuit of the electromagnetic vibration isolator. During the conversion, according to the magnetic circuit theory, analyze the influence of magnetic circuit elements on the magnetic flux distribution and simplify it. Deduce the relationship between the rotational speed difference, current, and magnetic field of the active rotor and the driven rotor, and establish a mathematical model by using Ampere's circuital law, Faraday's law of electromagnetic induction, and rotor dynamics theory. Finally, by adjusting the current to change the magnetic field strength, according to the mechanical vibration theory, use the magnetic force to adjust the vibration system parameters to achieve effective control of the vibration rate.

[0067] The mutual relationship between the electric field and the magnetic field is calculated through Faraday's law, that is, a changing electric field will generate a magnetic field, and a changing magnetic field will also generate an electric field, which is:

[0068]

[0069] where E represents the electric field strength, B represents the magnetic induction intensity; the formula on the right side of the equal sign represents the surface integral over the surface S, and the formula on the left side of the equal sign is the line integral along the closed curve τ. The normal direction of the surface and the winding direction of the curve satisfy the right-hand screw rule; t;

[0070] According to Ampere's circuital law, the line integral of the magnetic field strength along a closed path in a magnetic circuit is equal to the algebraic sum of the currents enclosed by the closed path multiplied by the permeability of free space, which is expressed as:

[0071] ∮B·dl=μ0∑I

[0072] where B is the magnetic induction intensity, dl is the differential element on the closed path, I is the current passing through the closed path, and μ0 is the permeability of free space.

[0073] In the electromagnetic vibration isolator, by adjusting the magnitude and frequency of the input current, according to the above Ampere's circuital law, the magnitude and distribution of the magnetic field strength can be accurately changed.

[0074] When there is a rotational speed difference between the active rotor and the driven rotor, due to electromagnetic induction, an induced electromotive force will be generated in a specific electromagnetic circuit. According to Faraday's law of electromagnetic induction, the magnitude of the induced electromotive force is proportional to the rate of change of the magnetic flux passing through the circuit.

[0075] In the vibration isolation system, vibration will cause relative movement between the active rotor and the driven rotor, which will in turn lead to a change in magnetic flux. At this time, by controlling the current to adjust the magnetic field strength, the generated magnetic force can interact with the interference force caused by vibration. According to the mechanical vibration theory, when the magnetic force and the interference force form a dynamic balance under specific conditions, the vibration amplitude of the vibration system will be effectively suppressed.

[0076] In a preferred embodiment of the present invention, based on electromagnetic theory and the principle of vibration system dynamics, a calculation formula of current-magnetic field-torque is derived, which is specifically:

[0077] Assume that the speed of the active rotor of the shock absorber is w1, the speed of the driven rotor is w2, and the speed difference Δw = w1-w2; according to the law of electromagnetic induction, the induced electromotive force E is related to the rate of change of the magnetic field, which can be expressed as:

[0078]

[0079] Where N is the number of coil turns, dφ is the change in magnetic flux, and dt is the change in time;

[0080] When considering the influence of current I on the magnetic field, the relationship between the magnetic field intensity H and the current I can be approximately expressed as (within a certain range):

[0081] H=kI

[0082] Where k is the proportional coefficient. By analyzing the relationship between the electromagnetic torque T and the speed difference Δw, we can get:

[0083] T=k T Δw

[0084] Among them, k T is the torque coefficient. At the same time, since the electromagnetic torque T is related to the magnetic field intensity B and the current I, according to the Ampere force formula, the electromagnetic torque T is expressed as:

[0085] T=k BI BI

[0086] Among them, k BI is a coefficient related to the structure. By combining them, we can deduce the relationship between the active rotor, the driven rotor, the speed difference between the two, and the current and magnetic field.

[0087] In a preferred embodiment of the present invention, the magnetic field force F is calculated by the magnetic field force formula:

[0088] F = BIL;

[0089] Where L represents the length of the wire;

[0090] In electromagnetic vibration isolators, the transmission torque T is closely related to the magnetic field force F and the rotor radius r. According to the basic definition of torque, the calculation formula of the transmission torque is:

[0091] T=BILr

[0092] By adjusting the input current, the magnetic field strength can be changed, thereby affecting the magnetic induction strength. When there is a speed difference between the active rotor and the driven rotor, the magnetic flux is related to the magnetic field strength. By changing the current to adjust the magnetic field strength, the size of the induced electromotive force will also be affected.

[0093] In a preferred embodiment of the present invention, the vibration isolation rate Iso_ratio is calculated as follows:

[0094] Iso_ratio = 100 - Tr

[0095] where Tr = (a p / a a * 100), Tr represents the transmission ratio, a p represents the vibration transmitted to the vibration isolation tabletop, and a a represents the vibration transmitted to the lower part of the vibration isolation system; the smaller the vibration isolation rate, the better the vibration isolation effect.

[0096] During the actual operation process, in order to achieve precise adjustment of the transmitted torque, the moment of inertia and angular acceleration of the motor also need to be considered. According to the rotational law, the connection between current regulation and the rotational state of the motor can be established.

[0097] When it is necessary to increase the transmitted torque, the microprocessor increases the input current, which increases the magnetic field strength and the magnetic induction intensity accordingly. According to the formula, the transmitted torque increases, and the angular acceleration of the motor increases, so that the driven rotor can follow the driving rotor faster, reducing the rotational speed difference; conversely, when it is necessary to reduce the transmitted torque, the input current is reduced, the magnetic field strength and the magnetic induction intensity are decreased, the transmitted torque is reduced, the angular acceleration of the motor is decreased, and the rotational speed change of the driven rotor slows down.

[0098] In addition, considering the load characteristics of the electromagnetic vibration isolator under different working conditions, the load torque will also affect the adjustment of the transmitted torque. During stable operation, the transmitted torque needs to be balanced with the load torque.

[0099] That is, when the load torque changes, by real-time monitoring the current and the operating parameters of the motor, and using the control algorithm to adjust the input current in a timely manner, the transmitted torque can quickly adapt to the change of the load, maintaining the stable operation of the system. Through these formulas and adjustment mechanisms, the precise control of the transmitted torque can be effectively achieved by adjusting the current, further improving the performance and stability of the electromagnetic vibration isolator under complex working conditions, and providing more reliable technical support for various equipment and systems that require vibration isolation and precise torque control.

[0100] At the same time, in order to achieve effective control of the shock absorber, some key control thresholds need to be set, and the relatively key thresholds include the vibration amplitude threshold, the current threshold, the rotational speed difference threshold, etc.

[0101] Regarding the vibration amplitude, the vibration amplitude is an important indicator to measure the working state of the shock absorber. Setting a vibration amplitude threshold can help us determine whether the system is within the normal vibration range. When the external excitation causes the vibration amplitude of the system to exceed a certain limit, it may have an adverse impact on the normal operation of the equipment and even cause damage.

[0102] In a preferred embodiment of the present invention, the current is adjusted based on the comparison result between the vibration isolation rate and the target vibration isolation rate, the magnetic field stiffness and damping are dynamically changed, and the vibration isolation rate is regulated. The specific method is as follows:

[0103] Let the minimum allowable value of the vibration amplitude be Amin and the maximum allowable value be Amax (for example, in a specific application scenario, according to the structural strength and operating requirements of the equipment, through a large number of experiments and theoretical analyses, it is determined that Amin = 0.1 mm and Amax = 5 mm). When the vibration amplitude is lower than Amin, it means that the shock absorber overly suppresses the vibration, resulting in a decline in the dynamic response performance of the system;

[0104] When the vibration amplitude exceeds Amax, it indicates that the vibration damping effect is not good, and the working parameters of the shock absorber need to be adjusted. Specifically: by increasing or decreasing the damping coefficient of the shock absorber, adjusting the response speed of the shock absorber to make it respond to vibration faster or slower; adjusting the installation position or angle of the shock absorber, etc. to improve the phenomenon of poor vibration damping effect of the shock absorber;

[0105] Let the minimum value of the exciting coil current be Imin and the maximum value be Imax (for example, Imin = 0.1 A and Imax = 5 A). When the current is lower than Imin, it may not be able to generate sufficient magnetic field force and magnetic field torque to achieve the vibration damping effect; when the current exceeds Imax, it may cause overheating problems;

[0106] Let the allowable range of the rotational speed difference between the active and driven rotors be Δwmin - Δwmax (for example, Δwmin = 10 rad / s and Δwmax = 100 rad / s). When the rotational speed difference exceeds the allowable range, the current is adjusted to change the magnetic field strength and adjust the rotational speed difference.

[0107] In actual operation, the system may not always reach these extreme values. Therefore, through real-time monitoring and dynamic adjustment strategies, the exciting coil current and the rotational speed difference are flexibly adjusted according to the actual vibration situation to ensure that the system is always in the best working state and avoid potential risks caused by excessive current or rotational speed difference exceeding the range. This flexible regulation method helps to improve the adaptability and reliability of the system and ensure that the shock absorber is always in the optimal working state.

[0108] During the working process, by adjusting the current in the excitation coil of the power generation system, the induced electromotive force generated by the rotating armature winding is controlled, and then voltage is provided for the eddy current coil. After the current in the eddy current coil is generated, magnetic lines of force are generated by the electromagnet core. These magnetic lines of force interact with the conductor layer, generating eddy current potential on the inner surface of the conductor layer, thereby generating a transmission torque to achieve vibration control.

[0109] By adjusting the magnitude of the current in the outer magnet, the transmission torque and electromagnetic stiffness of the magnetic coupling can be further adjusted. This not only realizes the overload protection of the magnetic coupling but also provides the effect of buffering and vibration reduction.

[0110] The present invention also provides a vibration isolation rate calculation and regulation system for a hybrid magnetic damper based on current drive, including a hybrid magnetic damper and a processing module. The processing module is connected to the hybrid magnetic damper, and the processing module executes the method described in the present invention to calculate and regulate the vibration isolation rate of the hybrid magnetic damper.

[0111] The present invention also provides a hybrid magnetic damper for the system described in the present invention, as Figure 2 shown, including a driving body 1 and a driven body 2. The driving body 1 and the driven body 2 are respectively connected by a driving shaft 3 and an output shaft 4. A driving rotor 5 is provided on the driving shaft 3, and a passive rotor 6 is provided on the output shaft 4.

[0112] The inner magnet 8 on the passive rotor 6 is located inside the outer magnet 7, and the inner magnet 8 and the outer magnet 7 are radially aligned with each other. The inner magnet 8 is composed of multiple magnetic poles, and the magnetic poles are evenly distributed in the circumferential direction of the passive rotor 6. Both the outer magnet 7 and the inner magnet 8 are magnetized radially, and adjacent outer magnets 7 have opposite magnetic pole directions. The magnetic poles of the inner magnet 8 are also opposite to the magnetic pole directions of the corresponding outer magnets 7.

[0113] A working magnetic circuit is formed between the driving rotor 5 and the passive rotor 6 through the magnetic field interaction between the outer magnet 7 and the inner magnet 8. The outer magnet 7 is powered by an excitation coil to generate a working magnetic field, realizing the magnetic force transmission and vibration damping functions of the system.

[0114] The present invention carefully constructs the physical model of the hybrid magnetic damper and deeply analyzes the internal relationship between the current and the magnetic field distribution and the magnetic field force. Based on the electromagnetic theory and the vibration system dynamics principle, the calculation formula of current-magnetic field-torque is rigorously derived.

[0115] Compared with the traditional vibration damping technology, this method has significant advantages. It can greatly improve the regulation ability of the vibration isolation effect, achieve efficient and precise regulation of the vibration isolation effect, and ensure that the hybrid magnetic damper can stably maintain excellent vibration damping performance under various complex working conditions.

[0116] Meanwhile, this method has prominent features such as high intelligence and strong adaptability, providing a highly innovative solution for the field of vibration control.

[0117] It has broad application prospects and is expected to be widely used in many industries with extremely strict requirements for vibration control, such as automotive, machinery manufacturing, aerospace, etc., providing strong support for the technological upgrading and product performance improvement of these industries.

[0118] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0119] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for calculating and controlling the vibration isolation rate of a hybrid magnetic vibration absorber based on current drive, characterized in that: The steps include: The permanent magnet equivalent magnetic circuit is converted into the electromagnetic vibration isolator equivalent magnetic circuit, and the physical model of the hybrid magnetic vibration absorber is constructed; Based on electromagnetic theory and the principle of vibration system dynamics, the calculation formula of current-magnetic field-torque is derived; Real-time monitoring of vibration parameters: vibration displacement, vibration velocity, vibration acceleration, obtaining the vibration isolation rate and comparing it with the target vibration isolation rate; Based on the comparison result between the vibration isolation rate and the target vibration isolation rate, the current is adjusted, the magnetic field stiffness and damping are dynamically changed, and the vibration isolation rate is regulated.

2. The method for calculating and controlling the vibration isolation rate of a hybrid magnetic vibration absorber based on current drive according to claim 1, characterized in that: Based on electromagnetic theory and the principle of vibration system dynamics, the calculation formula of current-magnetic field-torque is derived, which is: Assume that the speed of the active rotor of the shock absorber is w1, the speed of the driven rotor is w2, and the speed difference Δw = w1-w2; according to the law of electromagnetic induction, the induced electromotive force E is related to the rate of change of the magnetic field, which can be expressed as: Where N is the number of coil turns, dφ is the change in magnetic flux, and dt is the change in time; When considering the influence of current I on the magnetic field, the relationship between the magnetic field intensity H and the current I can be approximately expressed as: H=kI Where k is the proportional coefficient. By analyzing the relationship between the electromagnetic torque T and the speed difference Δw, we can get: T=k T Δw Among them, k T is the torque coefficient. At the same time, since the electromagnetic torque T is related to the magnetic field intensity B and the current I, according to the Ampere force formula, the electromagnetic torque T is expressed as: T=k BI BI Among them, k BI is a coefficient related to the structure. By combining them, we can deduce the relationship between the active rotor, the driven rotor, the speed difference between the two, and the current and magnetic field.

3. The method for calculating and controlling the vibration isolation rate of a hybrid magnetic vibration absorber based on current drive according to claim 2, characterized in that: Calculate the magnetic field force F using the magnetic field force formula: F = BIL; Where L represents the length of the wire; In electromagnetic vibration isolators, the transmission torque T is closely related to the magnetic field force F and the rotor radius r. According to the basic definition of torque, the calculation formula of the transmission torque is: T=BILr By adjusting the input current, the magnetic field strength can be changed, thereby affecting the magnetic induction strength. When there is a speed difference between the active rotor and the driven rotor, the magnetic flux is related to the magnetic field strength. By changing the current to adjust the magnetic field strength, the size of the induced electromotive force will also be affected.

4. The method for calculating and controlling the vibration isolation rate of a hybrid magnetic vibration absorber based on current drive according to claim 1, characterized in that: Calculate the vibration isolation ratio Iso_ratio as: Iso_ratio=100-Tr Where Tr = (a p / a a *100), Tr represents the transmission rate, a p represents the vibration transmitted to the vibration isolation table, a a Represents the vibration transmitted to the lower part of the vibration isolation system; the smaller the vibration isolation rate, the better the vibration isolation effect.

5. The method for calculating and controlling the vibration isolation rate of a hybrid magnetic vibration absorber based on current drive according to claim 1, characterized in that: Based on the comparison between the vibration isolation rate and the target vibration isolation rate, the current is adjusted, the magnetic field stiffness and damping are dynamically changed, and the vibration isolation rate is regulated. The specific method is as follows: Assume that the minimum allowable value of the vibration amplitude is Amin, and the maximum allowable value is Amax. When the vibration amplitude is lower than Amin, it means that the shock absorber over-suppresses the vibration, resulting in a decrease in the dynamic response performance of the system. When the vibration amplitude exceeds Amax, it indicates that the vibration reduction effect is poor and the working parameters of the shock absorber need to be adjusted. Specifically, by increasing or decreasing the damping coefficient of the shock absorber, adjusting the response speed of the shock absorber to make it respond to vibration faster or slower; adjusting the installation position or angle of the shock absorber to improve the poor vibration reduction effect of the shock absorber; Assume that the minimum value of the excitation coil current is Imin and the maximum value is Imax. When the current is lower than Imin, it may not generate enough magnetic field force and magnetic field torque to achieve the vibration reduction effect; when the current exceeds Imax, it may cause overheating problems; Assume that the allowable range of the speed difference between the active and driven rotors is Δwmin-Δwmax. When the speed difference exceeds the allowable range, the current is adjusted to change the magnetic field strength and adjust the speed difference.

6. A current-driven hybrid magnetic vibration absorber vibration isolation rate calculation and control system, characterized in that: The invention comprises a hybrid magnetic vibration absorber and a processing module, wherein the processing module is connected to the hybrid magnetic vibration absorber, and the processing module executes the method according to any one of claims 1 to 5 to calculate and regulate the vibration isolation rate of the hybrid magnetic vibration absorber.

7. A hybrid magnetic vibration absorber for the system according to claim 6, characterized in that: It includes a driving body and a passive body, wherein the driving body and the passive body are connected through a driving shaft and an output shaft respectively, the driving shaft is provided with a driving rotor, and the output shaft is provided with a passive rotor; The inner magnet on the passive rotor is located inside the outer magnet, and the inner magnet and the outer magnet are aligned with each other in the radial direction, the inner magnet is composed of a plurality of magnetic poles, and the magnetic poles are evenly distributed in the circumference of the passive rotor; the outer magnet and the inner magnet are magnetized in the radial direction, and the adjacent outer magnets have opposite magnetic pole directions, and the magnetic poles of the inner magnet are also opposite to the magnetic poles of the corresponding outer magnet; The working magnetic circuit is formed between the driving rotor and the passive rotor through the magnetic field interaction between the external magnet and the internal magnet. The external magnet is powered by the excitation coil to generate a working magnetic field, thereby realizing the magnetic force transmission and vibration damping functions of the system.

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