标题: | 对焦用音圈马达之创意设计与定位控制 Creative Design and Positioning Control of Voice Coil Motor for Focusing |
作者: | 吕宗熙 LIU TZONG-SHI 国立交通大学机械工程学系(所) |
关键字: | 音圈马达;图论;流值方法;短路圈;定位控制;Voice Coil Motor;Graph Theory;Flow Value Method;Shorted Turn |
公开日期: | 2010 |
摘要: | 近年來,由于音圈马达重量轻、价格低廉而且重现度好,正广泛地应 用在工业产品,譬如數位相机、手机相机和硬碟机,因此与超音波马达并 列伺服控制裡头举足轻重的致动器,值得研究。本计画分兩年执行,第一 年度拟利用图論的方法,以穷举演算从事磁路的创新设计,而穷举出所有 的磁路设计。为了从众多设计当中,筛选出适合轻薄短小化,适用于相机 对焦机构,而又具有优異致动能力的音圈马达,再利用流值方法和基因演 算法,比较所有的磁路设计,进行最佳化的程序。在本研究第一年度,将 建立系统化的磁路设计程序,设计并制作出新磁路结构之音圈马达。 既然产生了创新的音圈马达最佳设计,在本计画第二年度,旨在使音 圈马达的响应速度加快,缩短相机需要的对焦时间。因此不仅根据第一年 的创新与最佳设计之音圈马达磁路,本计画还将设计原有线圈之外的短路 圈,以期降低线圈的电感效应,使线圈的电阻-电感作用近乎于电阻电路, 快速电流响应,并使移动线圈能有更大的加速度。拟应用当代变压器原理 的互感,适当匹配线圈与短路圈,使得含短路圈之音圈马达获得最佳效能。 本计画第二年度拟针对含短路圈之音圈马达做理論推导,并对其系统性能 与响应进行电脑模拟。在磁场分析方面,以有限元素方法分析此音圈马达 之磁场。定位控制方面,本研究以顺滑模态控制为基础之模糊控制方法, 对此马达进行定位控制实验,利用雷射位移计测量其位移结果,比较含与 不含短路圈之音圈马达的稳定时间和定位精度。 Recently, voice coil motors (VCM) are widely used in industry such as digital cameras, cell phone cameras, and hard disk drives due to VCM merits of lightweight, cheap price, and good repeatability. Both ultrasonic motors and voice coil motors are promising actuators for servo control and worth research. This project will be conducted for two years. Based on magnetic circuit characteristics of VCM and graph theory, the first year will enumerate and generate innovative VCM designs. To screen VCMs of easy miniaturization for camera autofocusing usage and superb actuation capability among numerous designs that have been enumerated, this study will carry out a flow value method and genetic algorithm for comparison. The first year of this project will establish a systematic method for VCM innovative design. Now that innovative designs for VCM are created in the first year, the second year of this project aims to expedite VCM response time and shorten camera focusing time. Hence, this project will further design a shorted turn in addition to coils in the original magnetic circuit of VCM that is created in the first year of this project. The additional shorted turn will decrease the inductance effect of coils. The resistance and inductance in series effect of the coil will thus become closer to pure resistance, which expedites current response and increase acceleration. The theoretical model of VCM with shorted turn will be derived. Computer simulation will be carried out to investigate transient response. Finite element method will be conducted to compare magnetic flux density distributions between with and without shorted turn. For positioning control of VCM used in camera autofocusing, this project will develop and implement sliding-mode-based fuzzy control in experiments. Laser displacement sensors will be used to measure displacement and compare settling time and positioning accuracy between with and without a shorted turn. |
官方说明文件#: | NSC99-2221-E009-020-MY2 |
URI: | http://hdl.handle.net/11536/100035 https://www.grb.gov.tw/search/planDetail?id=2135272&docId=342826 |
显示于类别: | Research Plans |
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