Adaptive Ankle Torque Control for Bipedal Humanoid Walking on Surfaces with Unknown Horizontal and Vertical Motion. - Jacob Stewart; I-Chia Chang; Yan Gu; Petros A. Ioannou (CoRR, 2024)

Rejection of Sinusoidal Disturbances With Unknown Slowly Time-Varying Frequencies for Linear Time-Invariant Systems. - Jacob Stewart; Petros A. Ioannou (IEEE Trans. Autom. Control., 2024)