The Study on Semi-Active Damper

半主动减振器的研究

• 批准号: 60850044
• 负责人: IGUCHI Masakazu
• 金额: $ 6.66万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60850044/
• 关键词: Electronic Controlled Suspension; Magnetic Fluid; Semi-Active Damper; Shock absorber; Active Control Technology; 振動制御; 防振装置

The purpose of this research is to investigate semi-active dampers which are controlled by electric current. Magnetic fluid whose viscous coefficient varies according to the magnetic fluid is used for working fluid of the dampers. Dumping ration of the dampers can be changed without mechanical system. This research is composed of three phases:(1) Fundamental experiments -- to investigate basic properties of magnetic fluid when it is used for dampers.(2) Making prototypes of semi-active dampers for automobile suspensions.(3) Theoretical study -- to investigate how to control the semiactive suspension system.In the Fundamental experiments relations between fluid velocity and pressure difference are measured under the variety of shape of magnetic poles, gap distance, current in coil and piston velocity. Dumping coefficient changes according to current. The change is caused by changes of viscosity. Its ratio increases as the velocity of the fluid (Reynolds number) decreases.In design and making prototypes of semi-active dampers it is important to use the above feature of this mechanism. Prototype dampers are designed and made. The part which yields dumping force are placed outside of the cylinder. The advantages of this form is to reduce the fluid velocity and to avoid heat effects from electric magnet.In theoretical study the application to vehicle suspensions is focused. Optimal control theory is applied to not only semi-active suspensions but also active suspension.

本研究旨在探讨电流控制之半主动阻尼器。粘性系数根据磁性流体而变化的磁性流体被用作阻尼器的工作流体。阻尼器的阻尼比可以在没有机械系统的情况下改变。本研究分为三个阶段：（1）基础实验--研究磁流体作为阻尼器的基本性能。(2)汽车悬架半主动阻尼器样机制作。(3)理论研究--研究半主动悬浮系统的控制方法。在基础实验中，测量了在不同磁极形状、气隙距离、线圈电流和活塞速度下流体速度与压差的关系。转储系数根据电流而变化。这种变化是由粘度的变化引起的。在设计和制作半主动阻尼器样机时，充分利用这一特性是十分重要的。设计并制作了阻尼器样机。产生倾倒力的部分被放置在圆筒的外部。这种形式的优点是降低了流体的速度，避免了电磁铁的热效应。最优控制理论不仅适用于半主动悬架，而且适用于主动悬架。

项目成果

永井正夫,沢田康宏: 日本機械学会第938回機械力学講演会、昭和61年8月. (1986)

Masao Nagai、Yasuhiro Sawada：日本机械工程师学会第 938 届机械动力学讲座，1986 年 8 月。（1986 年）

永井正夫,沢田康宏: 日本機械学会第15回技術講演会「車両の運動力学」講演論文集. No.860-13. 77-80 (1986)

Masao Nagai，Yasuhiro Sawada：日本机械工程师学会第 15 届技术会议论文集“车辆动力学”第 860-13 号（1986 年）。

阿久津治,井口雅一: 東大機械研究報告. 第21巻. 65-66 (1986)

Osamu Akutsu，Masakazu Iguchi：东京大学机械研究报告，第 21 卷。65-66 (1986)

Masao Nagai.Yasuhiro Sawada: "Active Suspension Control for Flexible Structure of Elastic Vehicle Body-Design Method for Control of Rigid Body Motion and Elastic Vibaration" JSME The 15th technical Conf. on Vehicle Dy namics. 860-13. 77-80 (1986)

永井正夫.泽田康宏：“弹性车身柔性结构的主动悬架控制——刚体运动和弹性振动控制的设计方法”JSME第十五届技术会议

Masao Nagai.Yasuhiro Sawada: "Optimal Control of Active Suspension for a High Speed Ground Vehicle-Analysis of a Two-DOF Model with Pneumatic Actuator-" JSME The 938th Conf. on Mechanical Dynamics. (1986)

Masao Nagai.Yasuhiro Sawada：“高速地面车辆主动悬架的优化控制-带有气动执行器的二自由度模型分析-”JSME第938届会议