TRAC-IK和Orocos KDL类似,也是一种基于数值解的机器人运动学求解器,但是在算法层面上进行了很多改进(Specifically, KDL’s convergence algorithms are based on Newton’s method, which does not work well in the presence of joint limits — common for many robotic platforms. TRAC-IK concurrently runs
Motion Planning Library V-REP 从3.3.0开始,使用运动规划库OMPL作为插件,通过调用API的方式代替以前的方法进行运动规划(The old path/motion planning functionality is still functional for backward compatibility and available, but it is recommended not to use it anymore),这样更具灵活性. 运动规划就是在给定的位
A key concept in motion planning is configuration space, or C-space for short. Every point in the C-space C corresponds to a unique configuration q of the robot, and every configuration of the robot can be represented as a point in C-space. This desc
KDL(Kinematics and Dynamics Library)中定义了一个树来代表机器人的运动学和动力学参数,ROS中的kdl_parser提供了工具能将机器人描述文件URDF转换为KDL tree. Kinematic Trees: 链或树形结构.已经有多种方式来定义机构的运动学结构,KDL使用图论中的术语来定义: A closed-loop mechanism is a graph, 闭链机构是一幅图 an open-loop mechanism is a tree, 开链机构是
[题意] 机器人 Rob 可在一个树状路径上自由移动. 给定树状路径 T 上的起点 s 和终点 t, 机器人 Rob 要从 s 运动到 t. 树状路径 T 上有若干可移动的障碍物. 由于路径狭窄, 任何时刻在路径的任何位置不能同时容纳 2 个物体.每一步可以将障碍物或机器人移到相邻的空顶点上.设计一个有效算法用最少移动次数使机器人从 s 运动到 t. 输入文件示例input.txt5 0 31 1 21 1 21 3 0 1 30 2 2 41 1 3 输出文件示例output.txt3 [分析
机器人运动学逆解的问题经常出现在动画仿真和工业机器人的轨迹规划中:We want to know how the upper joints of the hierarchy would rotate if we want the end effector to reach some goal. IK Solutions: Analytical solutions are desirable because of their speed and exactness of solution. For
There are two ways of using the Jacobian matrix to solve kinematics. One is to use the transpose of the Jacobian JT. The other is to calculate the inverse of the Jacobian J-1. J is most likely redundant and non square,thus an ordinary inverse is not
参考文献: Efficient constrained path planning via search in state lattices Differentially Constrained Mobile Robot Motion Planning in State Lattices Spatiotemporal state lattices for fast trajectory planning in dynamic on-road driving scenarios 1. 整体思想 状