共查询到20条相似文献,搜索用时 156 毫秒
1.
《机械工程与自动化》2015,(4)
根据卫生陶瓷内外表面喷釉作业对机器人的要求,开发了一种手把手示教型串联关节施釉机器人机构。利用D-H法建立连杆坐标系,对机器人结构进行运动学分析,用矢量积的方法构造出雅可比矩阵,求得机器人的灵巧度,分析出最优结构。 相似文献
2.
3.
为了将3-RRR球面并联机器人用于空间定位跟踪的执行机构,以欧拉角描述机器人末端动平台的姿态,建立机器人位置方程,得到了关节转角的表达式.用几何分析的方法给出了机器人具有姿态空间的必要条件以及各关节必须满足的结构约束.将球面机构的连杆表示为球面上的大圆弧,连杆发生的运动干涉表现为两连杆圆弧的相交,采用球极映射的方法将代表连杆的空间圆弧映射为平面曲线,从而使得空间圆弧求交点问题简化为平面曲线求交.同时,考虑并联机器人在动平台的每个姿态下具有多种位置和每个连杆具有两侧边界的实际情形,提出了判别并联机器人发生运动学干涉的准则和流程.在实例中,以机器人各分支同时具有满足关节结构约束条件的运动学解为目标,探索出机器人姿态空间,进一步对姿态空间每一点进行运动干涉判别,得到了连杆运动干涉在姿态空间的分布. 相似文献
4.
5.
6.
7.
8.
仿生机器人研究是机器人学研究的热点之一,由于多年的进化,生物的各关节运动一般难以用机械结构完全实现。为克服目前仿生机器人普遍存在的刚度低、肢体功能弱等不足,以机器狗为研究对象,结合狗的基本行为特征和各关节的生理结构,将各关节的主要功能进行排序,并提出重要性/权重法作为机器狗设计中简化各运动关节的依据;据此分别运用并联双自由度转动机构RGRR-Ⅰ、RGRR-Ⅱ以及单自由度转动机构设计机器狗的各关节,并构造出24自由度的混联机器狗。所设计的混联机器狗具有结构简单、制造容易、刚度强、控制便捷、肢体运动灵活等优点。此研究思路和方法,对其他类型的仿生机器人设计有借鉴作用。 相似文献
9.
10.
针对上肢康复训练需求,设计一种采用二连杆串联结构的2自由度手臂康复机器人。基于D-H法对机器人的正、逆运动学进行理论分析,采用Matlab/Simulink和SimMechanics工具箱分别搭建机器人的正逆运动学理论模型与机构模型进行仿真对比,分析结果验证了机器人运动学建模的正确性。结合人体工程学相关标准和手臂关节运动范围要求,建立机器人与手臂机构的联合仿真模型,确定机器人的工作空间;并完成机器人进行画圆训练的轨迹规划,为机器人运动控制奠定了基础。基于联立约束法建立机器人的动力学模型,确定了机器人各关节驱动力矩大小,为驱动电机选取和控制器参数选择提供了依据。 相似文献
11.
根据对双足行走机器人的结构和步行步态的分析,将其简化为七连杆机构,并建立了运动学和动力学方程,在设定的双足机器人行走步态条件下,计算出其运动过程中各关节的运动轨迹及所需扭矩,并对其步行时步态的稳定性和各个关节扭矩进行了分析和比较,揭示了双足机器人行走时各关节所需扭矩之间的配比关系。 相似文献
12.
双足机器人并联踝关节优化设计 总被引:1,自引:1,他引:0
通过对人的踝关节运动机理分析,设计一种新型的双足机器人踝关节并联机构。建立并联机构的参数化模型,并对该模型进行运动学和动力学分析,得出该并联机构的一阶影响矩阵、伸缩运动的驱动力与零力矩点(Zero moment point, ZMP)轨迹关系。由于实际双足机器人行走时踝关节驱动力矩与角速度差异较大,为解决双足机器人步态行走中踝关节的动力学不平衡特性,结合并联机构的运动特点,迭代计算优化并联机构的结构参数,使踝关节两个驱动元件的驱动功率峰值和速度趋于一致。进行双足机器人步行试验研究,结果表明,优化后的并联结构踝关节的驱动功率峰值是串联结构下功率峰值的50 %左右,降低驱动元件的功率设计要求。在满足双足行走时踝关节的运动性能要求下选择小功率的驱动元件,有利于减小关节的体积和质量,减小能耗。 相似文献
13.
14.
15.
All over the world there exist several simulation systems, of varying degrees of sophistication, for robot working cells.
These systems can also perform respective operations for the analysis of situations in the robot work cell, such as output
of the actual parameters of all joints of the robot, graphic/display options and collision detection algorithms. A systematic
analysis of existing robot simulation systems showed that only a very few of them are able to perform a collision test. Although,
in the field of computational geometry and computer algebra, there exist several approaches for doing collision checks, most
of them seem to be not at a stage at which they can be really implemented or efficiently used.
In this paper we describe algorithms for static and dynamic collision detection, and its implementations in the frame of the
robot simulation system SMART. 相似文献
16.
17.
To investigate the design and the applications of elastic underactuated mechanisms for improving the energy efficiency of dynamic mechanical systems, the dynamics and control of a one-legged hopping robot with articulated leg is studied in this paper. To ensure the controllability of the elastic underactuated mechanism, a dynamics synthesis method is proposed for designing the underactuated mechanism so that the dynamics of the system can be transformed into the strict feedback normal form. To improve the energy efficiency of the one-legged locomotion system, an optimal motion planning method is presented to optimize the trajectories of the robot joints. A nonlinear controller is proposed to stabilize the hopping robot to its balance configuration in stance phase, and a switched linear controller is proposed to stabilize the continuous hopping movement. The stability of the presented controllers is analyzed in theory and verified by some numerical simulations. 相似文献
18.
介绍一种用于机器人手臂平衡的新型弹平衡机构的结构设计与分析方法。与过去的弹簧平衡机构形成互补,从而扩大了弹簧平衡机构的使用范围。新机构特别适用于类似美国PUMA型机器人大臂的平衡上。在新研制的喷浆机人主手手臂上得到了应用。 相似文献
19.
Hyeung-Sik Choi Tae-Hyeung Kim Woong-Ju Moon Paul I. Ro 《International Journal of Precision Engineering and Manufacturing》2009,10(4):49-56
This paper details a study performed on a new proposed twelve degree-of-freedom dual robot arm, which is very light but capable
of handling heavy loads. The proposed robot arm has a higher value for the ratio of the load capacity/robot weight than conventional
robot arms, which are actuated by motors with speed reducers, such as a harmonic drives, since it adopts a new type of robot
actuator based on a closed chain mechanism. Because of the high value of the ratio of the payload capacity/robot weight, it
can be used as a robot arm for mobile robots and for walking robots. Analyses of the design scheme and of the mechanism of
the joint actuator used for the robot arm are presented. Also, the control system developed for the robot arm is introduced.
The superior characteristics of the new proposed robot arm, handling heavy payloads with light weight links compared to industrial
robots, are presented through carrying out various payload capacity tests. Since the robot arm is designed with light links,
it has some deflections and these deflections of the links are analyzed using the Finite Element Method (FEM). The results
of performance tests are presented to check the correctness of the FEM analysis and to demonstrate the actual capability of
handling heavy payloads applied to the robot arm. 相似文献
20.
根据平面闭式运动链中复铰数目与总边数变化的对应关系,研究了复铰因子及其变化范围,然后按链节开放副间的边数综合法综合出了含复铰的8杆平面运动链的类型。方法比较简单直观。文中对两自由度7杆运动链的复铰型式也进行了探讨,从而验证了该方法的通用性。 相似文献