Identification of Time-varying Intrinsic and Reflex Joint Stiffness. - Heidi Giesbrecht; Mackenzie Baker; Daniel Ludvig; Ross Wagner; Robert E. Kearney (EMBC, 2006)

Real-Time Estimation of Intrinsic and Reflex Stiffness. - Daniel Ludvig; Robert E. Kearney (IEEE Trans. Biomed. Eng., 2007)

Closed-loop system identification of ankle dynamics using a subspace method with reference input as instrumental variable. - Yong Zhao; Daniel Ludvig; Robert E. Kearney (ACC, 2008)

Estimation of joint impedance using short data segments. - Daniel Ludvig; Eric J. Perreault (EMBC, 2011)

Efficient estimation of time-varying intrinsic and reflex stiffness. - Daniel Ludvig; Eric J. Perreault; Robert E. Kearney (EMBC, 2011)

Identification of Time-Varying Intrinsic and Reflex Joint Stiffness. - Daniel Ludvig; Tanya Starret Visser; Heidi Giesbrecht; Robert E. Kearney (IEEE Trans. Biomed. Eng., 2011)

Interpretation of non-parametric estimates of time-varying systems. - Daniel Ludvig; Eric J. Perreault (ACC, 2012)

Joint impedance decreases during movement initiation. - Daniel Ludvig; Stephen A. Antos; Eric J. Perreault (EMBC, 2012)

System Identification of Physiological Systems Using Short Data Segments. - Daniel Ludvig; Eric J. Perreault (IEEE Trans. Biomed. Eng., 2012)

Task-relevant adaptation of musculoskeletal impedance during posture and movement. - Daniel Ludvig; Eric J. Perreault (ACC, 2014)

The dynamic effect of muscle activation on knee stiffness. - Daniel Ludvig; Eric J. Perreault (EMBC, 2014)

Simultaneous in vivo Estimation of Muscle, Tendon, and Ankle Impedance. - Kristen L. Jakubowski; Daniel Ludvig; Sabrina S. M. Lee; Eric J. Perreault (EMBC, 2020)

Contributions of joint mechanics and neural control to the generation of torque during movement. - Daniel Ludvig; Mariah W. Whitmore; Eric J. Perreault (EMBC, 2020)

Quantitative comparison of time-varying system identification methods to describe human joint impedance. - Mark van de Ruit; Winfred Mugge; Gaia Cavallo; John Lataire; Daniel Ludvig; Alfred C. Schouten (Annu. Rev. Control., 2021)

Simultaneous Quantification of Ankle, Muscle, and Tendon Impedance in Humans. - Kristen L. Jakubowski; Daniel Ludvig; Daniel Bujnowski; Sabrina S. M. Lee; Eric J. Perreault (IEEE Trans. Biomed. Eng., 2022)

Unidirectional Human-Robot-Human Physical Interaction for Gait Training. - Lorenzo Amato; Lorenzo Vianello; Emek Baris Küçüktabak; Clément Lhoste; Matthew R. Short; Daniel Ludvig; Kevin M. Lynch; Levi J. Hargrove; José Luis Pons (CoRR, 2024)

Haptic Transparency and Interaction Force Control for a Lower Limb Exoskeleton. - Emek Baris Küçüktabak; Yue Wen; Sangjoon J. Kim; Matthew R. Short; Daniel Ludvig; Levi J. Hargrove; Eric J. Perreault; Kevin M. Lynch; José Luis Pons Rovira (IEEE Trans. Robotics, 2024)

Therapist-Exoskeleton-Patient Interaction: An Immersive Gait Therapy. - Emek Baris Küçüktabak; Matthew R. Short; Lorenzo Vianello; Daniel Ludvig; Levi J. Hargrove; Kevin M. Lynch; José Luis Pons Rovira (CoRR, 2025)