论文标题
在一步的单侧刚度扰动下，在3D双滑动模型下进行强大的动态行走：朝着兼容的地形上的双皮运动
Robust Dynamic Walking for a 3D Dual-SLIP Model under One-Step Unilateral Stiffness Perturbations: Towards Bipedal Locomotion over Compliant Terrain
论文作者
论文摘要
两人步行是机器人一直试图模仿数十年的人类最重要的标志之一。尽管以前的控制方法已经达到了在某些地形上行走的机器人，但仍需要一个框架，可以在各种兼容的表面上进行稳定和稳健的运动。这项工作提出了一种新型的生物力学风格的控制器，该控制器调节腿的刚度，以支持在兼容的领域上进行稳健和动态的两足球运动。首先，扩展了3D双滑道模型，以支持具有可变刚度和阻尼参数的兼容表面上的首次运动。然后，将提出的控制器与线性季度调节器（LQR）控制器进行比较，就踏上软地形的稳健性而言。 LQR控制器显示仅达到174 kN/m的中等地面刚度水平，而其刚度较低，则其失败。相反，所提出的控制器可以在低至30 kN/m的刚度水平下产生稳定的步态，从而导致腿部垂直的地面穿透距其静止长度的10％深度。提出的框架可以通过为多种合规形的地形产生稳定的步行轨迹来推进两足步行的领域，并通过改善具有可调刚度的假体设备的控制器来改善控制器。
Bipedal walking is one of the most important hallmarks of human that robots have been trying to mimic for many decades. Although previous control methodologies have achieved robot walking on some terrains, there is a need for a framework allowing stable and robust locomotion over a wide range of compliant surfaces. This work proposes a novel biomechanics-inspired controller that adjusts the stiffness of the legs in support for robust and dynamic bipedal locomotion over compliant terrains. First, the 3D Dual-SLIP model is extended to support for the first time locomotion over compliant surfaces with variable stiffness and damping parameters. Then, the proposed controller is compared to a Linear-Quadratic Regulator (LQR) controller, in terms of robustness on stepping on soft terrain. The LQR controller is shown to be robust only up to a moderate ground stiffness level of 174 kN/m, while it fails in lower stiffness levels. On the contrary, the proposed controller can produce stable gait in stiffness levels as low as 30 kN/m, which results in a vertical ground penetration of the leg that is deeper than 10% of its rest length. The proposed framework could advance the field of bipedal walking, by generating stable walking trajectories for a wide range of compliant terrains useful for the control of bipeds and humanoids, as well as by improving controllers for prosthetic devices with tunable stiffness.
