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System of trajectory planning for robotic manipulators based on pre-defined time-optimum trajectory shapes

机译:基于预定义的时间最优轨迹形状的机械手轨迹规划系统

摘要

A system for providing the reliable and numerically efficient generation of time-optimum trajectories with easy-to-track or continuous acceleration profiles for simple and blended moves of single- and multi-arm robotic manipulators, such as an extension and retraction move along a straight line or a rotary move following a circular arc, with velocity, acceleration, jerk, and jerk rate constraints. A time-optimum trajectory is the set of the position, velocity, and acceleration profiles which describe the move of a selected end effector along a given path in the shortest time possible without violating given constraints, with a special case being an optimum abort trajectory, which brings the moving arm into complete rest in the shortest time. The invention involves firstly identifying the set of fundamental trajectory shapes which cover all possible combinations of constraints for a given category of moves, e.g., a move along a straight line or along a circular arc; next, decomposing the fundamental shapes into segments where a single constraint is active; and, then, determining the time optimum paths in the segments. As a result, a unique design of time-optimum trajectories is produced based on a set of pre-defined trajectory shapes. The invention also involves the blending of simple moves into a single trajectory by decomposing trajectories of the individual moves into their orthogonal components and overlapping them for a given time interval, which results in a non-stop move along a smooth transfer path.
机译:该系统可提供可靠且在数值上高效的时间最优轨迹生成,具有易于跟踪或连续的加速度曲线,可用于单臂和多臂机器人操纵器的简单混合运动,例如沿直线的伸展和缩回运动沿圆弧的直线或旋转运动,并具有速度,加速度,加加速度和加加速度的约束。时间最佳轨迹是位置,速度和加速度曲线的集合,描述了选定的末端执行器在最短的时间内沿给定路径在不违反给定约束的情况下的运动,其中一种特殊情况是最优中止轨迹,这样可以在最短的时间内使动臂完全休息。本发明首先涉及识别一组基本轨迹形状,这些基本轨迹形状覆盖了给定种类的运动,例如,沿着一条直线或一条圆弧的运动的所有可能的约束组合。接下来,将基本形状分解为单个约束处于活动状态的分段;然后,确定分段中的时间最佳路径。结果,基于一组预定义的轨迹形状产生了时间最优轨迹的独特设计。本发明还涉及通过将单个运动的轨迹分解成它们的正交分量并将它们重叠给定的时间间隔来将简单的运动混合成单个轨迹,这导致沿着平滑传递路径的不间断运动。

著录项

  • 公开/公告号US6216058B1

    专利类型

  • 公开/公告日2001-04-10

    原文格式PDF

  • 申请/专利权人 BROOKS AUTOMATION INC.;

    申请/专利号US19990322858

  • 发明设计人 MARTIN HOSEK;HAKAN ELMALI;

    申请日1999-05-28

  • 分类号G06F190/00;

  • 国家 US

  • 入库时间 2022-08-22 01:04:40

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