技术领域technical field
本发明属于机械振动控制领域，具体涉及一种电磁机电耦合电路调谐吸振器。The invention belongs to the field of mechanical vibration control, in particular to an electromagnetic electromechanical coupling circuit tuning vibration absorber.
背景技术Background technique
机械运转过程中，过度的振动会对结构和机器造成严重损坏。在一些情况下，振动的抑制特别重要，如航空航天任务中的振动问题。由于在航空航天中失重和真空环境下阻尼很小，即使小的振动也可以持续很长时间。另一方面随着现代生活品质的提升，人们对周围环境的要求越来越高，机械振动的控制也不再只是仅仅满足于机械机构设计标准，还需要充分满足人们对机械产品舒适性的需求。During mechanical operation, excessive vibration can cause serious damage to structures and machines. In some cases, the suppression of vibration is particularly important, such as vibration problems in aerospace missions. Even small vibrations can last for a long time due to the low damping in weightlessness and vacuum in aerospace. On the other hand, with the improvement of the quality of modern life, people's requirements for the surrounding environment are getting higher and higher, and the control of mechanical vibration is no longer just satisfied with the design standards of mechanical mechanisms, but also needs to fully meet people's needs for the comfort of mechanical products .
动力吸振器是1909年由Frahm发明的，它具有原理简单、经济、方便、抑制效果显著的优点，在各种振动控制领域有着广泛的应用。但其也有一个不可忽视缺点，动力吸振器的工作频率范围很窄，当吸振器的固有频率与基础结构振动的频率相差较大时，此时不仅不会抑制基础的振动，甚至还会起到振动放大的作用。为此，各个领域都试图对传统的动力吸振器进行改进，一般有两种方式来实现：调节吸振器固有和调节吸振器阻尼。通过改变吸振器的刚度和质量可以达到改变其固有频率的目的，采用半主动的控制方法，在一定的工作范围内，可以使得吸振器的固有频率始终与基础振动频率相吻合，达到最佳的抑制效果。另一种方法是增加吸振器的阻尼，添加阻尼后的动力吸振器其工作频率范围要远远大于无阻尼情况。当然这种添加阻尼的方式也会牺牲一定的振动控制效果，因此阻尼的增加也不是越大越好，存在一个最优值。The dynamic vibration absorber was invented by Frahm in 1909. It has the advantages of simple principle, economy, convenience, and remarkable suppression effect, and is widely used in various vibration control fields. But it also has a disadvantage that cannot be ignored. The working frequency range of the dynamic vibration absorber is very narrow. The role of vibration amplification. For this reason, various fields are trying to improve the traditional dynamic vibration absorber, and there are generally two ways to achieve it: adjusting the inherent nature of the vibration absorber and adjusting the damping of the vibration absorber. By changing the stiffness and quality of the vibration absorber, its natural frequency can be changed. Using a semi-active control method, within a certain working range, the natural frequency of the vibration absorber can always match the basic vibration frequency to achieve the best vibration. Inhibitory effect. Another method is to increase the damping of the vibration absorber. The working frequency range of the dynamic vibration absorber after adding damping is much larger than that without damping. Of course, this method of adding damping will also sacrifice a certain vibration control effect, so the increase in damping is not necessarily the bigger the better, and there is an optimal value.
对于质量刚度的调节通常采用改变机械结构、调节质心位置、增加连续体预应力、添加额外的作用力等方式实现，这些方式均需要机械方式的调节，所需要的能量较大，调节所需要的控制系统也相对较为复杂，设计运行成本都很高。而阻尼往往是在设计之初就已经设计好了的，在工作过程中很难实现再调节。这些因素使得可调节动力吸振器的应用和发展受到了限制。因此只有更加简便经济的调谐方式才能使得这种可调节吸振器真正得到广泛推广和应用。The adjustment of mass stiffness is usually achieved by changing the mechanical structure, adjusting the position of the center of mass, increasing the prestress of the continuum, and adding additional force. These methods require mechanical adjustment, which requires a large amount of energy. The control system is also relatively complex, and the design and operation costs are very high. The damping is often designed at the beginning of the design, and it is difficult to adjust it during the working process. These factors limit the application and development of adjustable dynamic vibration absorbers. Therefore, only a more convenient and economical tuning method can make this adjustable vibration absorber widely popularized and applied.
发明内容Contents of the invention
本发明为一种电磁机电耦合电路调谐吸振器，其特征在于：所述的电磁机电耦合电路调谐吸振器包括机械部分和数字电路部分；机械部分由动子和定子组成，通过两端的直线轴承固定在中心导杆上；定子部分是由外壳和线圈组成，线圈位于动子和侧面外壳之间；数字处理电路包括AD模块、数字处理控制器和DA模块，线圈与数字电路相连。The invention is an electromagnetic electromechanical coupling circuit tuning vibration absorber, characterized in that: the electromagnetic electromechanical coupling circuit tuning vibration absorber includes a mechanical part and a digital circuit part; the mechanical part is composed of a mover and a stator, fixed by linear bearings at both ends On the central guide rod; the stator part is composed of a shell and a coil, and the coil is located between the mover and the side shell; the digital processing circuit includes an AD module, a digital processing controller and a DA module, and the coil is connected to the digital circuit.
其特征在于：所述的动子由三块衔铁和两块磁铁组成，两块磁铁分别处于两衔铁之间，其中最上面和最下面两块衔铁固定安装有两个直线轴承；动子的上下端衔铁部分与定子的上下端外壳通过压缩弹簧预紧装配。It is characterized in that: the mover is composed of three armatures and two magnets, and the two magnets are respectively located between the two armatures, wherein the uppermost and the lowermost two armatures are fixedly installed with two linear bearings; the upper and lower sides of the mover The end armature part and the upper and lower end shells of the stator are preloaded and assembled through compression springs.
其特征在于：所述的直线轴承选择线性直线轴承，导杆滑动部分为方形，控制动子绕中心转动的自由度。It is characterized in that: the linear bearing is a linear linear bearing, and the sliding part of the guide rod is square, which controls the degree of freedom of the mover to rotate around the center.
其特征在于：所述的定子包括吸振器外壳和线圈，下板开有螺纹安装孔，通过下板上的安装孔用螺纹连接将该装置安装在振动结构上；固定导杆弹簧座等固定与外壳上；侧面外壳选择导磁性能良好的材料。It is characterized in that: the stator includes a vibration absorber shell and a coil, and the lower plate has a threaded mounting hole, through which the mounting hole on the lower plate is threaded to install the device on the vibration structure; the fixed guide rod, spring seat, etc. are fixed with the On the shell; choose materials with good magnetic permeability for the side shell.
其特征在于：所述的线圈固定在靠近动子磁铁的位置，以圆形多层环绕；在不妨碍动子振动的情况下缩小线圈与动子之间的间隙。It is characterized in that: the coil is fixed at a position close to the magnet of the mover, and is surrounded by circular layers; the gap between the coil and the mover is narrowed without hindering the vibration of the mover.
其特征在于：所述的数字电路为包括AD、数字处理控制器、DA三部分，该电路与线圈串It is characterized in that: the digital circuit includes three parts: AD, digital processing controller and DA, and the circuit is connected with the coil string
联形成闭环，线圈感应电流流过所述电路时，AD模块将其转化为数字信号，通过数字信号处理控制器的PID控制处理后，输出到DA返回电路。When the coil induces current to flow through the circuit, the AD module converts it into a digital signal, and after being processed by the PID control of the digital signal processing controller, it is output to the DA return circuit.
其特征在于：所述的数字处理控制器的最终效果等效为串联电阻和电容，等效电阻R和等效电容C的大小应满足：It is characterized in that: the final effect of the digital processing controller is equivalent to series resistance and capacitance, and the size of the equivalent resistance R and the equivalent capacitance C should satisfy:
调节的数字电路的阻抗特性应满足以下方程式：The impedance characteristics of the regulated digital circuit should satisfy the following equation:
其中k为弹簧总的等效刚度，c为动子振动时所受的机械阻尼，ω为待控制结构振动的圆频率，L为线圈的自感系数，B为线圈所处的磁场强度，l为线圈的有效长度，μ为待控制结构等效质量与动子质量之比。Where k is the total equivalent stiffness of the spring, c is the mechanical damping of the mover when it vibrates, ω is the circular frequency of the vibration of the structure to be controlled, L is the self-inductance of the coil, B is the magnetic field strength of the coil, l is the effective length of the coil, and μ is the ratio of the equivalent mass of the structure to be controlled to the mass of the mover.
本发明的有益效果为：The beneficial effects of the present invention are:
1.本发明所述的一种电磁机电耦合电路调谐吸振器，通过机电耦合的电路部分控制系统固有频率，从而使装置在环境的不同典型振动频率下达到吸振，以此来解决已有装置工作频率单一和调节方式复杂的问题；1. An electromagnetic electromechanical coupling circuit tuning vibration absorber according to the present invention controls the natural frequency of the system through the electromechanical coupling circuit part, so that the device can achieve vibration absorption under different typical vibration frequencies of the environment, so as to solve the problem of existing devices. The problem of single frequency and complex adjustment methods;
2.本发明所述的一种电磁机电耦合电路调谐吸振器，通过电路特性的调节来实现固有频率的变化，调节方式相对于机械调节更加智能、经济、简易和稳定，也有利于可调节吸振器的集成化和微型化。2. An electromagnetic electromechanical coupling circuit tuning vibration absorber according to the present invention realizes the change of natural frequency through the adjustment of circuit characteristics. Compared with mechanical adjustment, the adjustment method is more intelligent, economical, simple and stable, and it is also conducive to adjustable vibration absorption integration and miniaturization of devices.
3.本发明所述的一种电磁机电耦合电路调谐吸振器，电路特性的调节采用数字电路来调节，调节连续性和精度较高，控制起来也更加方便，整个调节的控制系统耗能也极低。3. An electromagnetic electromechanical coupling circuit tuning shock absorber according to the present invention, the adjustment of the circuit characteristics is adjusted by a digital circuit, the adjustment continuity and precision are high, and the control is more convenient, and the entire adjustment control system consumes a lot of energy. Low.
附图说明Description of drawings
图1为本发明机械结构部分剖视图；Fig. 1 is a partial sectional view of the mechanical structure of the present invention;
图2为本发明电路部分数字处理示意图；Fig. 2 is the digital processing schematic diagram of circuit part of the present invention;
图3为本发明简化机电耦合模型原理图。Fig. 3 is a schematic diagram of the simplified electromechanical coupling model of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明进行详细说明：The present invention is described in detail below in conjunction with accompanying drawing:
一种电磁机电耦合电路调谐吸振器，具体分为两部分，一部分是如图1所示的机械结构部分，另一部分是如图2所示的电路部分。机械结构部分的动子是由磁铁6和衔铁7组成，通过两端的直线轴承2固定在中心导杆10上，可实现上下方向的自由滑动，动子的上下端分别由压缩弹簧1预紧装配。定子部分是由外壳和线圈组成，上3、下9板是用来固定导杆等位置的，侧面外壳4可与动子磁场回路相配合，增强通过线圈的磁场强度。当该机械部分安装在振动结构上后，动子随之振动，线圈5切割磁感线而产生感应电流。将线圈连接到数字电路12中，通过控制算法改变数字电路的输出，使得线圈所在等效电路的等效电阻和等效电容可调。由于线圈中的电流大小受到电路阻抗的影响而产生了不同的安培力，这个安培力又会反馈到机械系统，改变原动子振动的固有频率和阻尼，当数字处理控制器始终让该动子振动的固有频率和阻尼处于相对的较优值时，就可以达到吸振器调谐的目的。An electromagnetic electromechanical coupling circuit tuning vibration absorber is specifically divided into two parts, one part is the mechanical structure part as shown in Figure 1, and the other part is the circuit part as shown in Figure 2. The mover of the mechanical structure part is composed of a magnet 6 and an armature 7, and is fixed on the center guide rod 10 through the linear bearings 2 at both ends, which can realize free sliding in the up and down direction, and the upper and lower ends of the mover are respectively preloaded by a compression spring 1 . The stator part is composed of a shell and a coil. The upper 3 and lower 9 plates are used to fix the positions of the guide rods, etc. The side shell 4 can cooperate with the magnetic field circuit of the mover to enhance the magnetic field strength passing through the coil. When the mechanical part is installed on the vibrating structure, the mover vibrates accordingly, and the coil 5 cuts the magnetic induction line to generate an induced current. The coil is connected to the digital circuit 12, and the output of the digital circuit is changed through a control algorithm, so that the equivalent resistance and equivalent capacitance of the equivalent circuit where the coil is located can be adjusted. Because the magnitude of the current in the coil is affected by the impedance of the circuit, different ampere forces are generated, and this ampere force will be fed back to the mechanical system to change the natural frequency and damping of the prime mover vibration. When the digital processing controller always makes the mover When the natural frequency and damping of the vibration are at relatively optimal values, the purpose of vibration absorber tuning can be achieved.
优选的，直线轴承选择线性直线轴承，导杆滑动部分为方形，控制动子绕中心转动的自由度。Preferably, the linear bearing is a linear linear bearing, and the sliding part of the guide rod is square to control the degree of freedom of the mover's rotation around the center.
优选的，侧面外壳选择导磁性能良好的材料，以加强通过线圈磁回路的磁场强度。Preferably, the side shell is made of a material with good magnetic permeability, so as to strengthen the magnetic field strength passing through the coil magnetic circuit.
优选的，在不妨碍动子振动的情况下缩小线圈与动子之间的间隙。Preferably, the gap between the coil and the mover is narrowed without hindering the mover from vibrating.
优选的，通过下板上的安装孔8用螺纹连接将该装置安装在振动结构上。Preferably, the device is mounted on the vibrating structure by threaded connection through the mounting hole 8 on the lower plate.
本发明为一种电磁机电耦合电路调谐吸振器，为使本发明实施的目的、技术方案和优点更加清楚，下面对本发明的技术方案进行更加详细的描述。在附图中，自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The present invention is an electromagnetic electromechanical coupling circuit tuned vibration absorber. In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in more detail below. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
本发明所述的一种电磁机电耦合电路调谐吸振器，可简化为振子-弹簧-阻尼系统，当吸振器的固有频率与基础振动结构的振动频率一致时可以达到最佳的振动抑制效果。当频率调节难以达到完全一致，可以通过调节该发明的阻尼来减小由于频率微小偏差而产生的影响。对于发明所述的一种电磁机电耦合电路调谐吸振器，不管是频率的调节还是阻尼的调节都是通过线圈所在电路特性的调节来实现的。结合图3说明其调节原理和具体实现方法：An electromagnetic electromechanical coupling circuit tuning vibration absorber described in the present invention can be simplified into a vibrator-spring-damping system, and the best vibration suppression effect can be achieved when the natural frequency of the vibration absorber is consistent with the vibration frequency of the basic vibration structure. When the frequency adjustment is difficult to achieve complete consistency, the damping of the invention can be adjusted to reduce the influence caused by the slight deviation of the frequency. For the electromagnetic electromechanical coupling circuit tuned vibration absorber described in the invention, both frequency adjustment and damping adjustment are realized by adjusting the characteristics of the circuit where the coil is located. Combined with Figure 3 to illustrate its adjustment principle and specific implementation method:
动子总质量为m，压缩弹簧的总刚度为k，动子振动的机械阻尼为c，动子由永久磁铁和衔铁组成，所以会动子周围会存在恒定的磁场，线圈处于磁场中，当动子振动时磁场发生位移，相对的，线圈切割磁感线而产生感应电流。同时线圈与数字电路相串联，通过控制器的控制处理后，就相当于与一个可变电阻器R和可变电容器C相连。根据牛顿运动第二定律和电路的基尔霍夫电流定律可以得到整个机械和电路系统的机电耦合微分控制方程：The total mass of the mover is m, the total stiffness of the compression spring is k, the mechanical damping of the mover vibration is c, the mover is composed of a permanent magnet and an armature, so there will be a constant magnetic field around the mover, and the coil is in the magnetic field. When the mover vibrates, the magnetic field is displaced. Correspondingly, the coil cuts the magnetic induction line to generate an induced current. At the same time, the coil is connected in series with the digital circuit, and after being controlled and processed by the controller, it is equivalent to being connected with a variable resistor R and a variable capacitor C. According to Newton's second law of motion and Kirchhoff's current law of the circuit, the electromechanical coupling differential control equation of the entire mechanical and circuit system can be obtained:
其中x为动子振动偏离静平衡位置的位移，单位为m，B为动子所提供的磁场强度，单位为特斯拉，I为电路中的交变电流，单位为安培，l是线圈的有效长度，单位为米，F为外激励力的大小，单位为牛顿，ω为外激励的圆频率，单位为1/秒，字母上方一点代表该物理量对时间的微分。Where x is the displacement of the mover vibration away from the static equilibrium position, the unit is m, B is the magnetic field strength provided by the mover, the unit is Tesla, I is the alternating current in the circuit, the unit is ampere, l is the coil Effective length, the unit is meter, F is the magnitude of the external excitation force, the unit is Newton, ω is the circular frequency of the external excitation, the unit is 1/second, and a point above the letter represents the differential of the physical quantity with respect to time.
对式(1)经过拉普拉斯变换得到该系统的等效刚度和等效阻尼为：The equivalent stiffness and equivalent damping of the system obtained by Laplace transform of formula (1) are:
当调节R和C时，等效刚度和等效阻尼大小就会发生改变，使得等于外激励频率ω就可以使得动力吸振器的减振效果达到最优，但是在现实情况下这种完美的调节状态是很难实现的，或者外界激励频率并不是恒定不变的，所以为了减少吸振器对频率变化的敏感度，需要为吸振器增加阻尼。增加阻尼的最佳大小为所以根据(2)，(3)式，得到调节的数字电路的阻抗特性应满足以下方程式：When R and C are adjusted, the equivalent stiffness and equivalent damping will change, making Equal to the external excitation frequency ω, the vibration reduction effect of the dynamic vibration absorber can be optimized, but in reality, this perfect adjustment state is difficult to achieve, or the external excitation frequency is not constant, so in order to reduce The sensitivity of the absorber to changes in frequency necessitates adding damping to the absorber. The optimal size for increasing damping is Therefore, according to formulas (2) and (3), the impedance characteristics of the adjusted digital circuit should satisfy the following equation:
本发明所述的数字处理电路包括AD模块、数字处理器和DA模块，AD将电流的模拟信号转化为数字信号，数字处理器对该信号进行包括幅值增益调节、相位调节等操作，输出信号通过DA后输出返回电路，从而实现对线圈电路的阻抗特性的调节。The digital processing circuit of the present invention includes an AD module, a digital processor and a DA module. The AD converts the analog signal of the current into a digital signal, and the digital processor performs operations such as amplitude gain adjustment and phase adjustment on the signal, and the output signal After passing through the DA, the output returns to the circuit, so as to realize the adjustment of the impedance characteristic of the coil circuit.
本发明所述的动子质量、弹簧刚度、磁场强度、线圈有效长度的大小和尺寸都是可变的，具体的大小，应该针对该发明所述的一种电磁机电耦合电路调谐吸振器的应用场合来考量和优化，需要理解的是，本发明并不局限于上述特定实施方式，本领域技术人员可以在权利要求的范围内做出各种变形或修改，这并不影响本发明的实质内容。The size and size of the mover mass, spring stiffness, magnetic field strength, and coil effective length described in the present invention are all variable, and the specific size should be aimed at the application of a tuned vibration absorber for electromagnetic electromechanical coupling circuits described in the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. .
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710721345.XACN107339352B (en) | 2017-08-21 | 2017-08-21 | An electromagnetic electromechanical coupling circuit tuned vibration absorber |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710721345.XACN107339352B (en) | 2017-08-21 | 2017-08-21 | An electromagnetic electromechanical coupling circuit tuned vibration absorber |
| Publication Number | Publication Date |
|---|---|
| CN107339352A CN107339352A (en) | 2017-11-10 |
| CN107339352Btrue CN107339352B (en) | 2019-08-06 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710721345.XAActiveCN107339352B (en) | 2017-08-21 | 2017-08-21 | An electromagnetic electromechanical coupling circuit tuned vibration absorber |
| Country | Link |
|---|---|
| CN (1) | CN107339352B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939901B (en)* | 2017-11-16 | 2019-06-14 | 上海工程技术大学 | A magnetorheological elastomer semi-active dynamic vibration absorber and its selection and installation method |
| CN108226944B (en)* | 2017-12-28 | 2020-10-16 | 乐清市秋瑞软件开发有限公司 | Anti-falling electromechanical integrated laser range finder |
| CN108343694A (en)* | 2018-03-07 | 2018-07-31 | 武汉理工大学 | A kind of mixed type dynamic vibration absorber using bicyclic concatenation type permanent magnet |
| CN110985582A (en)* | 2019-12-31 | 2020-04-10 | 中科振声（苏州）电子科技有限公司 | Composite electromagnetic type dynamic vibration absorber |
| CN112460178B (en)* | 2020-11-25 | 2024-03-22 | 中国舰船研究设计中心 | Self-tuning low-power actuator, active control system and control method |
| CN112984039A (en)* | 2021-02-24 | 2021-06-18 | 武汉理工大学 | Axial system transverse vibration large-force-value inertial type electromagnetic active control device |
| CN113323989B (en)* | 2021-05-25 | 2022-08-30 | 中国农业大学 | Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method |
| CN113669404B (en)* | 2021-06-25 | 2022-10-21 | 上海工程技术大学 | Magnetorheological elastomer composite vibration absorber device with double-vibrator structure |
| CN114704589B (en)* | 2022-04-21 | 2023-03-24 | 山东大学 | Local resonance type phononic crystal vibration reduction device and equipment |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1016983B (en)* | 1988-11-24 | 1992-06-10 | 清华大学 | Electromagnetic vibration damper with continuously-adjustable spring rigidity |
| JP2004360747A (en)* | 2003-06-03 | 2004-12-24 | Canon Inc | Spring constant variable magnetic spring device |
| CN101526121B (en)* | 2009-04-17 | 2010-09-08 | 哈尔滨工程大学 | A Semi-active Vibration Isolation Actuator with Redundant Variable Pitch Structure |
| CN102410336B (en)* | 2011-11-07 | 2014-06-11 | 哈尔滨工程大学 | Coil external type semiactive vibration absorber in enclosed structure |
| CN103291828B (en)* | 2013-04-03 | 2016-01-27 | 哈尔滨工程大学 | Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber |
| CN105511513B (en)* | 2015-11-24 | 2018-07-03 | 西安空间无线电技术研究所 | A kind of electromagnetic damping vibration control apparatus of satellite borne equipment |
| CN105909713B (en)* | 2016-05-12 | 2018-08-17 | 哈尔滨工程大学 | A kind of high linearity electromagnetic type semi active vibration absorber |
| CN106286666B (en)* | 2016-10-08 | 2019-06-04 | 中国船舶重工集团公司第七一九研究所 | Reluctance type electromagnetism active vibration absorber |
| Publication number | Publication date |
|---|---|
| CN107339352A (en) | 2017-11-10 |
| Publication | Publication Date | Title |
|---|---|---|
| CN107339352B (en) | An electromagnetic electromechanical coupling circuit tuned vibration absorber | |
| CN110671459B (en) | A compact quasi-zero stiffness vibration isolator | |
| Palomera-Arias et al. | Feasibility study of passive electromagnetic damping systems | |
| CN110365249B (en) | Quasi-zero stiffness vibration isolation and energy collection system based on Stewart platform | |
| CN110578770B (en) | Electromagnetic-piezoelectric composite vibration control device based on synchronous switch damping technology | |
| CN110513419B (en) | Adjustable quasi-zero stiffness vibration isolator based on magnetic circuit design | |
| CN108547896A (en) | An electromagnetic spring intelligent shock absorber | |
| CN107606018B (en) | An hourglass type electromagnetic vibration isolator | |
| CN105317912B (en) | Broadband rigidity and damp adjustable semi active vibration absorber | |
| WO2014023057A1 (en) | Magnetic mechanism with negative rigidity | |
| Olaru et al. | A novel vibration actuator based on active magnetic spring | |
| CN108425986A (en) | Drum type brake electric eddy-current damping device, damping adjusting method and bridge vibration-proof structure | |
| Firoozy et al. | Using time delay in the nonlinear oscillations of magnetic levitation for simultaneous energy harvesting and vibration suppression | |
| CN111779790B (en) | a vibration damping device | |
| CN100414136C (en) | Magneto-rheological elastomer active vibration-absorbing system and control method | |
| CN205207526U (en) | Half initiative bump leveller with adjustable broadband rigidity and damping | |
| CN110513422B (en) | Novel lever type nonlinear eddy current damper | |
| Mao et al. | Design and experimental study of a multiple-degree-of-freedom vibration absorber by using an inertial actuator | |
| CN109027124B (en) | A torsional quasi-zero stiffness vibration isolator with adjustable negative stiffness and its control method | |
| CN205350179U (en) | Adopt asymmetric magnetism tooth structure to realize half initiative isolator of electromagnetic type of zero accurate rigidity characteristic | |
| CN105757155B (en) | A kind of adjustable half active shock-absorbing means of quality | |
| CN105782306B (en) | The compound semiactive vibration-isolating actuator of permanent-magnetism electromagnetic | |
| CN208089848U (en) | Drum type brake electric eddy-current damping device and bridge vibration-proof structure | |
| CN107023607A (en) | Dynamic Damper Control | |
| Ye et al. | Motion characteristics and output voltage analysis of micro-vibration energy harvester based on diamagnetic levitation |
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |