PWM controlled Micro ER Valve and Its Application to Micro Actuator Control

PWM控制的微型ER阀及其在微型执行器控制中的应用

• 批准号: 09650262
• 负责人: NAKANO Masami
• 金额: $ 2.11万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650262/
• 关键词: ER Suspension; Micro ER Valve; PWM Control; Micro Flow Structure; Flow Rate Characteristics; Micro Actuator; PID Control Strategy; Position Control Characteristics; 流動特性

ER fluids are one of a family of functional fluids, which show dramatic and reversible rheological changes in several millisecond when the electric field is applied. Therefore, in the ER fluid hydraulic circuit systems, it impossible to control the pressure and flow rate using an ER valve consisting of only electrodes with no moving parts. In this research, the PWM control of the ER valve has been proposed because the ER valve works as an ON-OFF valve, and in order to develop a micro-actuator system driven by PWM controlled micro-ER valves featuring the miniaturization of the ER valve, the following investigations have been done.(1) The flow rate control characteristics and micro flow patterns of fundamental ER valves consisting of two glass electrodes whose gap ranges from 0.8 to 0.1 mm have been investigated under DC electric control and PWM control, and the effects of the gap size, the applied DC electric field strength, the carrier frequency of the PWM wave and the pressure differe … More nce across the ER valves on the flow rate control characteristics and micro flow patterns have been clarified.(2) For the oscillatory flow of an ER fluid within a two-dimensional rectangular channel consisting of two glass electrodes. the micro-structural flow patterns have been observed using a microscope, relating to the viscoelastic properties of the ER fluid evaluated from the relationship between a defined fluid strain and the pressure difference. The effects of the fluid strain amplitude and frequency of the oscillatory flow and applied electric field strength have been clarified.(3) On the basis of the above results, a miniature bellows actuator driven by three ports ER valve having a pair of micro ER valves has been developed, The several synchronized control strategies of a pair of PWM controlled ER valves have been tried to determine the suitable one. And then, a position feedback control strategy with P11)compensator in which the duty ratio of PWM wave for the ER valves was varied in proportion to the output -signal of the PID compensator was applied to the developed miniature actuator, and the control performance was investigated to construct a high precision micro servo-system using the ER fluid. Less

电流变液是一类功能流体，在外加电场的作用下，在几毫秒内表现出显著的可逆的流变性变化。因此，在电流变液压回路系统中，不可能使用只由电极组成、没有运动部件的电流变阀来控制压力和流量。本研究针对电流变阀作为开关阀的特点，提出了电流变阀的脉宽调制控制方法，并针对电流变阀小型化的特点，提出了一种基于脉宽调制控制的微电流变阀驱动系统。(1)研究了电流变阀在直流电控和脉宽调制两种控制方式下的流量控制特性和微流控特性，以及间隙大小、外加直流电场强度等因素对电流变阀的流量控制特性和微流态的影响。脉宽调制波的载波频率和压差…对于电流变流体在两个玻璃电极组成的二维矩形通道内的振荡流动，对电流变流体的流量控制特性和微观流型有了更多的了解。用显微镜观察了电流变流体的微观结构流动模式，根据定义的流体应变与压差之间的关系评价了电流变流体的粘弹性性质。在上述研究结果的基础上，研制了一种由一对微型电流变阀驱动的三端口电流变阀驱动的微型波纹管执行器，并尝试了一对脉宽调制电流变阀的几种同步控制策略。在此基础上，将电流变阀的脉宽调制占空比与PID补偿器的输出信号成正比的位置反馈控制策略应用于所研制的微型执行器，并对其控制性能进行了研究，以构建高精度的电流变液微伺服系统。较少

项目成果

中野政身: "知能流体はどこまで可能か-ER流体-" JSME第76期全国大会講演資料集. No.98-3(VI). 201-202 (1998)

中野雅美：“智能流体有多远？-ER流体-”JSME第76次全国会议演讲材料第98-3(VI)号（1998）。

S.L.Vieira: "Dynamic Viscoelasticity of an ER Fluid in Oscillatory Slit Flow and its ER Micro-structural Mechanism" Proc.of VII Int.Conference and Exhibition on Mobility Technology (SAE Brazil 98). No.SAE982894. 1-11 (1998)

S.L.Vieira：“振荡狭缝流中 ER 流体的动态粘弹性及其 ER 微观结构机制”Proc.of VII Int.Conference and Exhibition on Mobility Technology (SAE Brazil 98)。

M.Nakano: "Dynamic viscoelasticity in oscillatory slit flow of an ER suspension containing sulfonated polymer particles" International Journal of Modern Physics B. Vol.13, No.14 &15 印刷中. (1999)

M.Nakano：“含有磺化聚合物颗粒的 ER 悬浮液的振荡狭缝流中的动态粘弹性”，《国际现代物理学杂志》B. 第 13 卷，第 14 期和第 15 期，已出版（1999 年）。

M.Nakano: "PWM flow rate control of ER valve and its application to ER actuator control" Abstracts of Int.Conf.on ERMR 97. 55-56 (1997)

M.Nakano：“ER 阀门的 PWM 流量控制及其在 ER 执行器控制中的应用” Int.Conf.on ERMR 97. 55-56 (1997) 摘要

M.Nakano: "PWM flow rate control of ER valve and its application to ER actuator control" Proc.of 6th Int.Conf.on ERF,MRS and Applications. 772-779 (1998)

M.Nakano：“ER 阀门的 PWM 流量控制及其在 ER 执行器控制中的应用”Proc.of 6th Int.Conf.on ERF、MRS 和应用。