Design of Vibration Isolator of Six Degree-of-freedom by Using Magnet-spring with Energy Source of Permanent Magnet

永磁能源磁力弹簧六自由度隔振器设计

• 批准号: 12555064
• 负责人: NAKAGAWA Noritoshi
• 金额: $ 8.45万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555064/
• 关键词: Permanent magnet; Magnet-Spring; Vibration isolator of 6 d.o.f.; Vibrational energy; 6自由度震動絶縁; 磁石ばね; 振動制御; 振動絶縁; 非称形振動

In recent years, accompanying the practical use of permanent magnets that have a high coercive force and high residual magnetic flux density, researches about magnetic bearings, MR dampers and so on, which use magnetic force and magnetic fluid to control vibration are flourishing.In this study, the spring characteristic, which is in a quasi-zero state under specific displacement range, has been created. This characteristic has been obtained by combing negative spring constant of metal spring withnon-linear characteristic of magnet-spring using a resisting force of magnet^<1)>. This magnet is made from rare-earth magnets (Nd-Fe-B) that have a high coercive force and high residual magnetic flux density. But, because this system needs large magnets and complicated mechanism of link, it has the point at issue of huger device, heat loss of link part and so on.So a magnet-circuit with a periodic magnetic field has been created to solve these points at issue^<2)>. In this system, the non-linear characteristics of a magnet-circuit with a periodic magnetic field and the linear characteristics of the metal spring are combined to create a spring characteristic which has linear characteristics when the spring constant is in a quasi-zero state under normal conditions of use, but which overall is a non-linear spring constant.In this paper, to expand the displacement range that the spring constant is in quasi-zero state, the circuit was improved by increasing pole of outside magnet. And a pendulum suspension system model using this characteristic (experimental model) was built, and the vibration characteristics of this model were confirmed.

近年来，随着具有高矫顽力和高剩磁通密度的永磁体的实用化，利用磁力和磁流体控制振动的磁力轴承、磁流变阻尼器等的研究蓬勃发展。本研究创造了在特定位移范围内处于准零状态的弹簧特性。该特性是通过将金属弹簧的负弹簧常数与利用磁体的阻力^<1)>的磁体弹簧的非线性特性相结合而获得的。该磁铁由稀土磁铁（Nd-Fe-B）制成，具有高矫顽力和高剩余磁通密度。但是，由于该系统需要大型磁体和复杂的连杆机构，因此存在装置庞大、连杆部分的热量损失等问题。因此，创建了具有周期性磁场的磁路来解决这些问题^<2)>。该系统将具有周期性磁场的磁路的非线性特性和金属弹簧的线性特性相结合，形成了弹簧特性，在正常使用条件下弹簧常数处于准零状态时具有线性特性，但总体上是非线性弹簧常数。本文为了扩大弹簧常数处于准零状态的位移范围，通过增加外部磁体的极数对电路进行了改进。并利用该特性建立了摆悬架系统模型（实验模型），并证实了该模型的振动特性。

项目成果

E.Fujita: "An Experimental Study for Collision Stimulus Device Using a Magnet-Spring"Proc.DETC2001 ASME International 2001 Design Engineering Technical Conferences. (CD-ROM). (2001)

E.Fujita：“An Experimental Study for Collision Stimulus Device using a Magnet-Spring”Proc.DETC2001 ASME 国际 2001 年设计工程技术会议。

E.Fujita: "An Experimental Study for Collision Stimulus Device Using a Magnet-Spring"Proc. DETC2001 ASME International 2001 Design Engineering Technical Conferences. (CD-ROM). (2001)

E.Fujita：“使用磁力弹簧的碰撞刺激装置的实验研究”Proc。

E. Fujita: "An Experimental Study for Frequency Characteristics of Vibration Isolator Using a Magnet-circuit with a Periodic Magnetic Field"JSME Dynamics & Design Conference 2001. (CD-ROM). (2001)

E. Fujita：“使用周期性磁场磁路的隔振器频率特性的实验研究”JSME Dynamics

藤田悦則: "周期磁界型磁石ばねを利用した制振装置の振動特性に関する実験的研究"日本機械学会Dynamics & Design Conference 2001. (CD-ROM). (2001)

Etsunori Fujita：“使用周期性磁场型磁力弹簧的阻尼装置的振动特性的实验研究”日本机械工程师学会动力学与设计会议 2001 年。（CD-ROM）。

E. Fujita: "An Experimental Study for Collision Stimulus Device Using a Magnet-Spring"Proc. DETC2001 ASME International 2001 Design Engineering technical Conferences. (CD-ROM). (2001)

E. Fujita：“使用磁力弹簧的碰撞刺激装置的实验研究”Proc。