Study on Compact Fine Positioner with Thermal Compensation Capability

具有热补偿功能的紧凑型精密定位器的研究

• 批准号: 09650285
• 负责人: YAMAMOTO Yoshio
• 金额: $ 1.92万
• 依托单位: Tokai University (1998-1999)Ibaraki University (1997)
• 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 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650285/
• 关键词: Giant Magnetostrictive Material; Positioning Device; Positioner; Actuator; Smart Material; Thermal Expansion; Rare-earth Alloy; 位置決めアクチュエータ; 熱補償制御; フィードバック制御; 力検出; 微動機構

In view of the application of giant magnetostrictive materials to compact, fine positioner, two kinds of prototypes have been developed through analyses and design modification. Results of this study are summarized below.1. In-situ preload meassuring: Proper preloading to giant magnetostrictive materials vital for an efficient use of the material. In-situ preload measuring is available by means of strain measurement of the housing of the positioner. This not only provides accurate preloading but also serves sensing capability of the displacement output of the positioner. Based on the displacement signal, the input current to the solenoid coil can be controlled via feedback to adjust the output.2. Design elaboration for thermal compensation: When the direct current is supplied to the solenoid coil, joule heat emitted by the coil results in outstanding thermal expansion of the giant magnetostrictive material and nearby parts, which significantly degrades the performance of the positioner. In this study, design modification was made such that the thermal expansion is internally offset.3. Thermal effect instrumentation system: In order to evaluate the thermal expansion of the various parts of the positioner, a measuring system was newly developed. In this system temperature of the positioner is accurately controlled via external heat source and a variety of measurement signals can be gathered simultaneously including displacement output, strain output, and temperatures on more than one spots.4. Magnetic circuit design via finite element analysis: Giant magnetostrictive material has a very low permeability and a caution needs to be paid so that sufficient magnetic flux passes through the material. Finite element method was used to analyze the magnetic circuit so that about 80% of the generated flux passes through the material.

针对超磁致伸缩材料在紧凑、精细定位器中的应用，通过分析和设计修改，研制了两种样机。本研究结果总结如下： 1．现场预载测量：对超磁致伸缩材料进行适当的预载对于材料的有效使用至关重要。通过定位器外壳的应变测量可实现现场预载测量。这不仅提供了精确的预载，而且还具有定位器位移输出的传感能力。根据位移信号，通过反馈控制电磁线圈的输入电流，从而调节输出。2．热补偿设计细化：当向电磁线圈通入直流电时，线圈发出的焦耳热会导致超磁致伸缩材料及其附近部件产生显着的热膨胀，从而显着降低定位器的性能。在这项研究中，对设计进行了修改，使热膨胀在内部抵消。 3．热效应仪表系统：为了评估定位器各部分的热膨胀，新开发了测量系统。该系统通过外部热源精确控制定位器的温度，同时采集位移输出、应变输出、多点温度等多种测量信号。 4．通过有限元分析进行磁路设计：超磁致伸缩材料的磁导率非常低，需要小心，以便有足够的磁通量通过材料。采用有限元法分析磁路，使产生的磁通约80%穿过材料。

项目成果

EDA, H.: "Giant Magnetostrictive Actuators and Sensors"Instrumentation and Control. Vol.38. 197-201 (1999)

EDA, H.：“巨型磁致伸缩执行器和传感器”仪表和控制。

Y. Yamamoto: "Three-dimensional Magnetostrictive Vibration Sensor: Development, Analysis and Applications,"Journal of Alloys and Compounds. Vol.258. 107-113 (1997)

Y. Yamamoto：“三维磁致伸缩振动传感器：开发、分析和应用”，合金与化合物杂志。

江田弘,山本佳男ほか: "超磁歪を用いた制振デバイスの制御に関する研究"第6回「運動と振動の制御」シンポジウム講演論文集. 355-358 (1999)

Hiroshi Eda、Yoshio Yamamoto 等：“利用巨磁致伸缩控制减振装置的研究”第六届“运动与振动控制”研讨会论文集355-358（1999）。

Y. Yamamoto: "Application of Giant Magnetostrictive Materials to Positioning Actuators"Proceedings of 1999 IEEE・ASME Int. Conf. on Advanced Intelligent Mechatronics. 215-220 (1999)

Y. Yamamoto：“巨磁致伸缩材料在定位执行器中的应用”1999 年 IEEE/ASME 国际先进智能机电一体化会议论文集。

Yoshio Yamamoto,et.al.: "Micro Positioning and Actuation Devices Using Giant Magnetostriction Materials"Proceedings of 2000 IEEE Internmational Conference on Robotics and Automation. (to appear). (2000)

Yoshio Yamamoto 等人：“使用巨磁致伸缩材料的微定位和驱动装置”2000 年 IEEE 国际机器人与自动化会议论文集。