共查询到19条相似文献,搜索用时 171 毫秒
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基于SMA驱动的微型机器人系统 总被引:2,自引:0,他引:2
本文提出了一种基于SMA驱动的刚/弹耦合式微型蠕动机器人,该机器人的特殊结构不但显著地增大了其移动速度,而且使该机器人具有了主动转弯能力,在一定程度上克服了目前SMA机器人移动速度慢、只能被动转弯的缺点.同时,该机器人利用两组偏心轮自锁机构及相应的平行四边形换向机构使其具有双向移动能力.文章最后对该机器人的控制系统进行了介绍. 相似文献
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对第一代形状记忆合金(SMA)驱动的微型六足步行机器人进行了改进,创新设计了双三足机器人的身体传动关节,并首次提出组合偏动SMA驱动器,使机器人的刚性躯体柔性化,从而实现了微型双三足步行机器人(MDTWR)的全方位运动。 相似文献
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针对形状记忆合金(SMA)丝、SMA弹簧驱动力和输出位移小的缺陷,提出了基于SMA弹簧阵列的人工肌肉设计方法。利用仿生学原理,设计了SMA弹簧阵列的空间串并联结构,推导了人工肌肉驱动力计算公式,对其输出模拟量用组合学方法进行了分析。利用UG和ADAMS建立了人工肌肉的多体动力学模型,同时,在Simulink上建立了人工肌肉的激活控制模型,在这些基础上,模拟仿生手臂弯曲伸展运动的工作过程,分析该人工肌肉的驱动和控制特性。仿真结果表明,SMA弹簧阵列结构能显著增大SMA驱动器输出位移和驱动力,并简化模拟量输出的控制。 相似文献
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压电陶瓷驱动微小型步行机的设计与仿真研究 总被引:1,自引:0,他引:1
为适应微细操作的需要,研制了一种压电陶瓷驱动的微小型步行机样机。该样机利用仿生蠕动原理,能方便地实现平面上三自由度运动。分析了步行机的移动机理及结构组成。基于ADAMS的动力学仿真结果分析了各种因素(包括步行机与运动平面的摩擦状况、激励电压的幅值和频率等)对步行机运动的影响。仿真结果表明了运动的可行性。 相似文献
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仿鱼鳞的减阻表面设计 总被引:1,自引:0,他引:1
基于对鱼鳞减阻原理的分析,讨论了不同鱼类表面的牺牲性粘液减阻、表面切向流减阻两种原理;提出了针对不同粘度介质中的运动物体,应采用相应的减阻表面设计;分析了鱼鳞的结构布置与几何曲线,提出了模仿鱼鳞原理与结构进行减阻表面仿生设计的方法,这对在水和其它流体中运动的机械表面减阻设计具有指导意义。 相似文献
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The previous research regarding the gait planning of quadruped robot focuses on the sequence for lifting o and placing the feet, but neglects the influence of body height. However, body height a ects gait performance significantly, such as in terms of the stride length and stability margin. We herein study the performance of a quadruped robot using the equivalent mechanism concept based on metamorphosis. Assuming the constraints between standing feet and the ground with hinges, the ground, standing legs and robot body are considered as a parallel mechanism, and each swing leg is regarded as a typical serial manipulator. The equivalent mechanism varies while the robot moves on the ground. One gait cycle is divided into several periods, including step forward stages and switching stages. There exists a specific equivalent mechanism corresponding to each gait period. The robot's locomotion can be regarded as the motion of these series of equivalent mechanisms. The kinematics model and simplified model of the equivalent mechanism is established. A new definition of the multilegged robot stability margin, based on friction coe cient, is presented to evaluate the robot stability. The stable workspaces of the equivalent mechanism in the step forward stage of trotting gait under di erent friction coe cients are analyzed. The stride length of the robots is presented by analyzing the relationship between the stable workspaces of the equivalent mechanisms of two adjacent step forward stages in one gait cycle. The simulation results show that the stride length is larger with increasing friction coe cient. We herein propose a new method based on metamorphosis, and an equivalent mechanism to analyze the stability margin and stable workspace of the multilegged robot. 相似文献