共查询到19条相似文献,搜索用时 109 毫秒
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针对现有下肢康复训练机器人人机连接柔顺性和关节对中性差的问题,提出了一种个体自适应的欠驱动康复训练机器人。欠驱动机器人系统只有4个直线驱动,驱动的直线运动通过连杆和人机连接机构转化为人下肢在矢状面内的屈伸运动,可带动人体进行步态康复训练。建立了机构的人机耦合模型,进行了正、逆运动学分析。然后,基于人机耦合模型,提出了一种人体参数与连接参数的在线辨识方法,可获得难以实际测量的人体肢体长度与人机连接参数等信息,并实现了个体自适应步态轨迹规划。最后,利用MATLAB和ADAMS软件进行了仿真验证,验证了参数辨识方法的正确性,以及提出的康复训练机器人具有个体适应性。 相似文献
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脑卒中现代人身体残疾的主要原因之一。相关肢体康复训练器的研究很多,但坐姿康复机器人的相关研究尚未见到。在基于中风康复训练的循序渐进要求和康复机器人的运动柔顺性控制前提下,设计了一种轨迹可调的五杆变胞机构下肢康复机器人。对机器人的下肢训练机构进行性能分析,求解两个曲柄处传动轴任意工作状态和任意时刻的受力分布情况,并利用MATLAB软件进行仿真。结果表明:我们设计的下肢运动机构满足运动幅度可调和承载力需求,不同工作状态下两传动轴承受的阻力变化不大;结合分析的结果使选用的电机功率可以达到最小化;根据受力的波动情况,也可为后期进一步研究康复机器人机构运动的柔顺性控制提供一定的依据。 相似文献
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针对人体下肢运动能力受损患者,研制了一种新型躺式下肢康复机器人。采用定轨式模拟椭圆形步态轨迹,进行康复训练。应用UG建模,进行了运动学分析和ADAMS仿真,验证了机构设计的可行性,具有一定的研究意义。 相似文献
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康复训练机器人的应用日益增多,同时机器人机构的正解和逆解是当前康复训练机器人的研究热点之一。选取某一康复训练机器人机构为研究对象,在综合对比分析后对肩关节康复训练机器人机构的构型进行了选择,确定将3-RRS球面并联机构来实现肩关节构型;在对其抽象简化后进行了运动分析,并在运动分析的基础上采用矩阵法和闭环矢量法相结合的方法详细推导了该机器人机构的位置逆解,得到了在期望执行动作的结果下机构的输入条件,也即在期望的康复训练结果下康复训练机器人机构3个支链的具体输入函数,获得了机构进行反向设计的函数。该分析计算能够以康复训练的最终执行动作作为设计目标和已知条件对机器人的机构进行设计,从而求得机器人机构的杆长、夹角等在内的各参数,在康复机器人的设计和研发过程中具有较高的实际应用价值。 相似文献
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两足步行椅机器人是一种为残疾人设计,用来替代轮椅和假肢的助残机器人.本文介绍了两足步行椅机器人的整体机构设计,并以前向运动为例,详细讨论了利用ZMP理论进行步行稳定性计算的方法,最后通过计算机仿真验证了这一计算方法的有效性. 相似文献
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针对人体步态周期的摆动相与承载相生物力学特征,创新性的提出一种集变胞仿生膝关节外骨骼机器人与具有“J”型轨迹特征运动副人体等效下肢为一体的人-机并联研究原型,在深入解析其变胞运动承载仿生工作机理的基础上,系统提出一种多体运动尺度综合方法。该方法首先基于多体运动学,系统构建人-机并联运动学模型;其次针对该外骨骼对其穿戴位置滑移与下肢个体差异的有效几何包容,提出一种新型运动学综合性能评价指标——仿生灵巧包容度;再次将多体运动尺度综合问题归结为一类多目标优化问题;最后计及不同人群的步态差异性,采用压缩粒子群算法,深入开展膝关节外骨骼系统多体运动尺度综合数值仿真。通过仿真数据对比与参数敏感性分析,佐证该膝关节外骨骼机器人所具有的变胞仿生运动学综合性能,以及多体运动尺度综合方法的合理性与有效性,为后续研究原型承载有效性的相关研究,提供理论基础。 相似文献
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With the widespread application of legged robot in various fields, the demand for a robot with high locomotion and manipulation ability is increasing. Adding an extra arm is a useful but general method for a legged robot to obtain manipulation ability. Hence, this paper proposes a novel hexapod robot with two integrated leg–arm limbs that obtain dexterous manipulation functions besides locomotion ability without adding an extra arm. The manipulation modes can be divided into coordinated manipulation condition and single-limb manipulation condition. The former condition mainly includes fixed coordinated clamping case and fixed coordinated shearing case. For the fixed coordinated clamping case, the degrees of freedom (DOFs) analysis of equivalent parallel mechanism by using screw theory and the constraint equation of two integrated limbs are established. For the fixed coordinated shearing case, the coordinated working space is determined, and an ideal coordinated manipulation ball is presented to guide the coordinated shearing task. In addition, the constraint analysis of two adjacent integrated limbs is performed. Then, mobile manipulation with one integrated leg–arm limb while using pentapod gait is discussed as the single-limb manipulation condition, including gait switching analysis between hexapod gait and pentapod gait, different pentapod gaits analysis, and a complex six-DOF manipulation while walking. Corresponding experiments are implemented, including clamping tasks with two integrated limbs, coordinated shearing task by using two integrated limbs, and mobile manipulation with pentapod gait. This robot provides a new approach to building a multifunctional locomotion platform. 相似文献
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设计下肢膝关节以上截肢患者髋关节康复训练器的控制系统。根据膝关节以上截肢患者的运动特点,使用AVR单片机控制磁粉制动器,产生康复者所需要的力矩,锻炼康复者的膝关节以上肌肉。计算截肢患者在康复训练中时间和能量消耗,对下肢康复训练建立一种新的训练模式。利用运算速率高、抗干扰功能强大和便于控制的AVR单片机,通过C语言编程,结合下肢残肢康复训练实际临床理论,达到自动控制理论和下肢康复训练之间的完美结合。该康复训练器运用自动控制原理可以成功的实现对髋关节部分肌肉的锻炼,精准的控制下肢康复训练的载荷,实现对髋关节肌肉康复训练系统的训练方案的进一步探索。 相似文献
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The equivalent mechanism of the system is often considered as one specific mechanism in most existing studies of multi-legged robots, however the equivalent mechanism is varying while the robot moves on the ground. Four typical tripod period gaits of a radial symmetrical six-legged robot are analyzed. Similar to the metamorphic mechanism, the locomotion of multi-legged robot is considered as a series of varying hybrid serial-parallel mechanisms by assuming the constraints of the feet on the ground with hinges. One gait cycle is divided into several periods, and in different walking period there is a specific equivalent mechanism corresponding to it, and the walking process of multi-legged robot is composed by these series of equivalent mechanisms. Walking performance can be got by analyzing these series of equivalent mechanisms. Kinematics model of the equivalent mechanism is established, workspaces of equivalent mechanisms are illustrated by simulation and a concept of static stability workspace is proposed to evaluate the static stability of these four gaits. A new method to calculate the stride length of multi-legged robots is presented by analyzing the relationship between the workspace of two adjacent equivalent parallel mechanisms in one gait cycle. The stride lengths of four gaits are given by simulations. Comparison of stride length and static stability among these four typical tripod gaits are given. It has been proved that mixed gait and insect-wave gait II have better static stability than mammal kick-off gait and insect-wave gait I. Insect-wave gait II displays its advantage on stride length while the height of robot body lower than 87 mm, mammal kick-off gait has superiority on stride length while the height of robot body higher than 115 mm, and insect-wave gait I shows its shortcoming in stride length. The proposed method based on metamorphic theory and combining the footholds and body height of robot provides a new method to comprehensive analyze the performance of multi-legged robot. 相似文献
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针对老年人或者下肢功能较弱患者自主行走存在一定困难的问题,研究了一种能够辅助其行走的套装式助力机器人.机器人工作时绑缚在人体上,为行走提供动力.机器人左右对称,单侧机构包括髋关节和膝关节两部分,分别由直流电机驱动丝杠螺母机构的电动缸实现.基于Matlab/Simulink和SimMechanics建立了套装式助力机器人... 相似文献