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研究了双二重八面体变几何桁架机器人的逆位置分析,针对双二重八面体变几何桁架机器人单元结构特点,建立起机构逆位置分析的封闭解。 相似文献
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N重八面体变几何桁架机器人速度、加速度分析 总被引:1,自引:0,他引:1
结合变几何桁架机器人的特点 ,研究了 N重八面体变几何桁架机器人的速度、加速度分析方法 ,导出了 N重八面体变几何桁架机器人速度、加速度分析递推公式 ,提出了末端平台参考点的速度和加速度正解的分析方法 ,为动力学分析打下了基础 相似文献
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基于神经网络的冗余度四面体变几何桁架机器人位置控制 总被引:1,自引:0,他引:1
提出了一个基于双重 BP神经网络的冗余度四面体变几何桁架机器人位置控制方案 ,通过增加关节角变化最小的约束条件 ,定义了优化的目标函数 ,在此基础上建立了冗余度四面体变几何桁架机器人位置控制模型 ,并以四重四面体变几何桁架机器人位置控制为例进行了系统仿真。 相似文献
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冗余度变几何桁架机器人动力学计算 总被引:1,自引:0,他引:1
应用模糊神经网络对机器人逆动力学模型进行辨识,将整个动力学模型系统分为三个子系统,分别采用三个模糊神经网络系统对广义质量矩阵、向心力及哥氏力矩阵和重力矩阵进行学习,求解了冗余度四面体变几何桁架机器人的逆动力学问题,并对四重四面体的变几何桁架机器人进行了仿真计算。 相似文献
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一种新型四自由度并联平台机构及其位置分析 总被引:11,自引:1,他引:10
提出了一种能实现空间三维移动和绕 z轴转动的并联机器人机构模型——空间4- TRT并联机构。文中采用螺旋理论分析了它能实现空间三维移动和绕 z轴转动的机构学原理 ,计算了它的自由度 ;给出了其位置反解的方法 ,推导出了位置正解的封闭方程 ,并进行了数值验证。 相似文献
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The inverse kinematics problems of robots are usually decomposed into several Paden–Kahan subproblems based on the product of exponential model. However, the simple combination of subproblems cannot solve all the inverse kinematics problems, and there is no common approach to solve arbitrary three-joint subproblems in an arbitrary postural relationship. The novel algebraic geometric (NAG) methods that obtain the general closed-form inverse kinematics for all types of three-joint subproblems are presented in this paper. The geometric and algebraic constraints are used as the conditions precedent to solve the inverse kinematics of three-joint subproblems. The NAG methods can be applied in the inverse kinematics of three-joint subproblems in an arbitrary postural relationship. The inverse kinematics simulations of all three-joint subproblems are implemented, and simulation results indicating that the inverse solutions are consistent with the given joint angles validate the general closed-form inverse kinematics. Huaque III minimally invasive surgical robot is used as the experimental platform for the simulation, and a master–slave tracking experiment is conducted to verify the NAG methods. The simulation result shows the inverse solutions and six sets given joint angles are consistent. Additionally, the mean and maximum of the master–slave tracking experiment for the closed-form solution are 0.1486 and 0.4777 mm, respectively, while the mean and maximum of the master–slave tracking experiment for the compensation method are 0.3188 and 0.6394 mm, respectively. The experiments results demonstrate that the closed-form solution is superior to the compensation method. The results verify the proposed general closed-form inverse kinematics based on the NAG methods. 相似文献
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运用回转变换张量法,求解了三个腕关节轴线相交于一点的6自由度喷涂机器人的运动学逆解,并利用消元法简化了运动学逆解的求解过程,得出了较为简易的解析解。利用Matlab软件编写了机器人的逆解计算程序,并进行实例计算,不仅证明了运动学逆解的正确性,也为后续研究奠定了基础。 相似文献
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C.-Y. Chen M.-G. Her Y.-C. Hung M. Karkoub 《The International Journal of Advanced Manufacturing Technology》2002,20(5):375-380
A new scheme based on recursive fuzzy logic is presented in this paper for solving the point-to-point inverse kinematics problem
of serial robots. To improve the convergence problem in the whole workspace, the membership functions of the fuzzy logic are
searched for, tuned, and optimised using a simple genetic algorithm. A dominant joint, which brings the end-effect closer
to the desired target, has to be selected before the implementation of the fuzzy logic in order to reduce the number of fuzzy
logic iterations. The inverse kinematics solution of robots is usually obtained by direct inversion of the kimenatics equations,
but this technique often leads to a singular Jacobian matrix during the calculations. The work presented in this paper provides
a direct approach to the calculation of the kinematics inverse problem which bypasses the kinematic singularities. Computer
simulations of the proposed scheme confirm the findings of the theoretical developments. 相似文献