预测运动学控制机械臂的冲击诱导关节速度跳变
Predicting Impact-Induced Joint Velocity Jumps on Kinematic-Controlled Manipulator
AI总结:
针对机器人冲击任务中常用方法预测关节速度跳变误差大的问题,提出避免对病态矩阵求逆并计算复合刚体等效惯性特性的方法,在 Panda 基准上将平均预测误差降低 81.98%。
摘要:
为实现有目的的机器人冲击任务,预测关节速度跳变对于保证控制器可行性和硬件完整性至关重要。我们观察到,与使用 Panda 机械臂的 250 次基准实验相比,机器人学中常用方法存在相当大的预测误差。我们按如下方式将平均预测误差降低了 81.98%:首先,我们关注任务空间方程,而不对病态的关节空间惯性矩阵求逆。其次,在冲击事件发生前,考虑到高增益(刚性)运动学控制的机械臂表现得像一个复合刚体,我们计算了末端执行器尖端的等效惯性特性。
英文摘要:
In order to enable on-purpose robotic impact tasks, predicting joint-velocity jumps is essential to enforce controller feasibility and hardware integrity. We observe a considerable prediction error of a commonly-used approach in robotics compared against 250 benchmark experiments with the Panda manipulator. We reduce the average prediction error by 81.98% as follows: First, we focus on task-space equations without inverting the ill-conditioned joint-space inertia matrix. Second, before the impact event, we compute the equivalent inertial properties of the end-effector tip considering that a high-gains (stiff) kinematic-controlled manipulator behaves like a composite-rigid body.
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