TPAD controller performance for three force components. TPAD controller performance for three force components. (A) Fx in medial-lateral direction satisfies to be within ±1.5% BW. (B) Fy in anterior-posterior direction is within ±1.5% BW. (C) Fz in vertical direction is controlled to be at −10% BW. J. Kang et al. Sci. Robotics 2017;2:eaan2634 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works