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形状记忆合金驱动器驱动方式研究 总被引:9,自引:0,他引:9
七文阐述了 S M A 驱动器的驱动原理,分析了 S M A 的性能和不同驱动方式对 S M A 驱动器输出性能的影响。文章认为, S M A 的相变温度范围越小,高低温时性能相差越大, S M A 双程驱动器的输出性能越好;差动式 S M A 双程驱动器与偏动式 S M A 双程驱动器相比,前者更容易获得较大的输出力和输出位移,但后者较容易控制,响应速度较快。 相似文献
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DYNAMICMODELLINGFORROLLINGSLIDEWAYSASSEMBLYWITHDAMPINGOIL-FILMS.DYNAMICMODELLINGFORROLLINGSLIDEWAYSASSEMBLYWITHDAMPINGOIL-FIL... 相似文献
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MIS和CAD是CIMS系统的两个重要组成部分,实现MIS与CAD系统的信息集成是建立CIMS系统的基础之一。本文在CIMS哲理指导下,通过研究和实践,提出了MIS与CAD系统的关系模型以及二者之间信息集成的一种实现方法,为企业在现有的MIS和CAD系统的基础上扩展CIMS系统创造了条件。 相似文献
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STUDYONISOMORPHISMOFPLANARKINEMATICCHAINSSTUDYONISOMORPHISMOFPLANARKINEMATICCHAINSLiWenhui;ZouHuijun;CaoZhikui(ShanghaiJiaoto... 相似文献
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MACHININGMECHANISMOFMIRROR-LIKESURFACEOFADVANCEDCERAMICSMACHININGMECHANISMOFMIRROR-LIKESURFACEOFADVANCEDCERAMICSWangZhongqi;C... 相似文献
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尺寸因素对低合金钢冲击韧性的影响 总被引:1,自引:0,他引:1
本言语用数学方法研究了尺寸因素对低合金钢30SiMn2MoVA钢冲击韧性的影响。评述了GB229、2106,ASTM23,ISO83、148三种标准测定结果的差异。 相似文献
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应用编程接口是CIMS集成平台的关键内容之一。本文给出了CIMS集成平台应用编程接口(API)的体系结构,详细描述了CIMS集成平台API在CIMS应用各个层次上的需求、调用和分类。最后给出了实现CIMS集成平台API技术支持和原型实现。 相似文献
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为扩大蒸汽发生器管间视频检查的范围,对SMA双程驱动器进行了分析比较,计算确定了SMA弹簧和偏压弹簧的参数,研制了用偏动式SMA双程驱动器驱动的微小型3-CSR并联机构,实现了微型摄像头的位姿调整。 相似文献
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针对单一的磁流变传动传递转矩较小的缺点,提出了一种电热形状记忆合金与磁流变联合传动方法,可以提高传动装置传递的转矩。基于形状记忆合金的热效应特性,建立了电热形状记忆合金弹簧挤压力与温度的关系;利用Maxwell软件,对磁场进行有限元分析,得到了不同电流下圆盘工作间隙中的磁场强度沿半径的分布情况;基于磁流变液的磁流变特性,建立了磁流变传递的转矩与磁场强度、半径等参数的关系;基于形状记忆合金弹簧的挤压特性,建立了摩擦转矩与挤压力、半径等参数的关系式。研究结果表明,电热形状记忆合金弹簧的挤压力产生的摩擦转矩随温度的升高而增大;磁场强度沿半径的增大而增强;电热形状记忆合金与磁流变联合传递的转矩比单一磁流变传递的转矩提升了53.8%。 相似文献
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The limited length shrinkage of shape memory alloy (SMA) wire seriously limits the motion range of SMA-based gripper. In this paper, a new soft finger without silicone gel was designed based on pre bent SMA wire, and the finger was back to its original shape by heating SMA wire, rather than relying only on heat exchange with the environment. Through imitating palm movement, a structure with adjustable spacing between fingers was made using SMA spring and rigid spring. The hook structure design at the fingertip can form self-locking to further improve the load capacity of gripper. Through the long thin rod model, the relationship of the initial pre bent angle on the bending angle and output force of the finger was analyzed. The stress-strain model of SMA spring was established for the selection of rigid spring. Three grasping modes were proposed to adapt to the weight of the objects. Through the test of the gripper, it was proved that the gripper had large bending amplitude, bending force, and response rate. The design provides a new idea for the lightweight design and convenient design of soft gripper based on SMA. 相似文献
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An in-pipe moving mechanism based on design parametric study of dynamic characteristics of clamping or moving module comprising
shape memory alloy (SMA) spring actuators has been fabricated and evaluated under in-pipe condition. Conventional in-pipe
moving mechanisms for pipe inspection, driven by electromagnetic motors, have large volume and mass. The SMA actuator can
be an alternative for a small-sized in-pipe moving mechanism due to its great power-to-weight ratio and simple structure.
Therefore, spring type SMA actuators are selected to fabricate an inchworm-like moving mechanism that consists of clamping
and moving modules. For selection of proper operating type (a bias type or a differential type) for clamping module and moving
module, displacements and dynamic characteristics of each operating type have been investigated. Based on experimental results,
we decide some design parameters such as wire diameters, spring diameters and the numbers of turns of SMA spring actuators
and fabricate the in-pipe moving mechanism according to the designed results. A moving speed of 34 mm/min and traction force
of 0.4 N have been obtained from the driving experiment in a pipe with the diameter of 39 mm. 相似文献
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论述了形状记忆合金 (SMA)弹簧驱动元件的应力、应变、温度和相变之间的关系并对铜基形状记忆合金螺旋弹簧进行了系统的测试。对试验结果及其机理进行了系统分析 ,试验结果表明 ,SMA弹簧元件在 3种基本使用状态下的应力—应变—温度关系呈现非线性 ,设计中不能直接应用虎克定律。测试结果为进一步揭示SMA驱动特性及设计SMA驱动元件提供了参考依据。 相似文献
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研究了一种以镍钛(NiTi)形状记忆合金带材为基本驱动材料的平面涡卷式扭转驱动器。该驱动器利用NiTi合金的单程形状记忆效应与回复弹簧的相互作用,实现驱动器在高低温状态下正反两向的扭矩输出。分析了驱动器的基本结构形式和驱动原理,探讨了NiTi合金驱动部件的设计方法和基本制备工艺。设计制作了驱动器原理样机,并测试了驱动器的输入输出特性。测试结果表明,该驱动器在给定的高低温环境(10~60℃)下能够在正反两个方向连续稳定地输出扭矩,最大行程范围为0~175°,最大输出扭矩达到0.33N·m。实测结果证明了驱动器设计方案与制备工艺的可行性。 相似文献
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