A Method for Improving the Dynamic Accuracy of a Robot Performing a Repetitive Task. - Richard H. Middleton; Graham C. Goodwin; Richard W. Longman (Int. J. Robotics Res., 1989)

Liapunov Stability of Force-Controlled Grasps with a Multi-fingered hand. - Fuhua Jen; Moshe Shoham; Richard W. Longman (Int. J. Robotics Res., 1996)

Integrated adaptive-robust control of robot manipulators. - Gangbing Song; Richard W. Longman; Lilong Cai (J. Field Robotics, 1998)

Human-Like Actuated Walking that is Asymptotically Stable Without Feedback. - Katja D. Mombaur; Hans Georg Bock; Richard W. Longman (ICRA, 2001)

Stable One-Legged Hopping without Feedback and with a Point Foot. - Katja D. Mombaur; Richard W. Longman; Hans Georg Bock; Johannes P. Schlöder (ICRA, 2002)

Updating Procedures For Iterative Learning Control In Hilbert Space. - Konstantin Avrachenkov; Homayoon S. M. Beigi; Richard W. Longman (Intell. Autom. Soft Comput., 2002)

Direct Model Reference Learning and Repetitive Control. - SooCheol Lee; Richard W. Longman; Minh Q. Phan (Intell. Autom. Soft Comput., 2002)

The Phenomenon of Apparent Convergence Followed by Divergence in Learning and Repetitive Control. - Richard W. Longman; Yi-Cheng Huang (Intell. Autom. Soft Comput., 2002)

Design of a Noncausal FIR Model Inverse as a Compensator in Repetitive Control. - Richard W. Longman; Benjamas Panomruttanarug (HPSC, 2003)

Open-loop Stable Control of Periodic Multibody Systems. - Katja D. Mombaur; Hans Georg Bock; Johannes P. Schlöder; Richard W. Longman (HPSC, 2003)

Stability of Higher Order Repetitive Control. - Sang June Oh; Richard W. Longman (HPSC, 2003)

Open-loop stability - a new paradigm for periodic optimal control and analysis of walking mechanisms. - Katja D. Mombaur; Hans Georg Bock; Johannes P. Schlöder; Richard W. Longman (RAM, 2004)

Time-Optimal Elbow Robot Motion. - Guido Giese; Richard W. Longman; Hans Georg Bock (Int. J. Robotics Autom., 2005)

Open-loop stable running. - Katja D. Mombaur; Richard W. Longman; Hans Georg Bock; Johannes P. Schlöder (Robotica, 2005)

Self-stabilizing somersaults. - Katja D. Mombaur; Hans Georg Bock; Johannes P. Schlöder; Richard W. Longman (IEEE Trans. Robotics, 2005)

Designing Learning Control that is Close to Instability for Improved Parameter Identification. - Richard W. Longman; Kevin Xu; Benjamas Panomruttanarug (HPSC, 2006)

Optimizing Spring-Damper Design in Human Like Walking that is Asymptotically Stable Without Feedback. - Katja D. Mombaur; Richard W. Longman; Hans Georg Bock; Johannes P. Schlöder (HPSC, 2006)

Iterative learning control as a method of experiment design for improved system identification. - Richard W. Longman; Minh Q. Phan (Optim. Methods Softw., 2006)

Modeling of Non-ideal Variable Pitch Valve Springs for Use in Automotive Cam Optimization. - Henry Yau; Richard W. Longman (HPSC, 2009)

On the Theory and Design of Linear Repetitive Control Systems. - Richard W. Longman (Eur. J. Control, 2010)

On Quadratic Programming Based Iterative Learning Control for Systems with Actuator Saturation Constraints. - Fei Gao; Richard W. Longman (HPSC, 2012)

Robustification of iterative learning control and repetitive control by averaging. - Minh Q. Phan; Richard W. Longman; Benjamas Panomruttanarug; SooCheol Lee (Int. J. Control, 2013)

Optimal bilinear observers for bilinear state-space models by interaction matrices. - Minh Q. Phan; Francesco Vicario; Richard W. Longman; Raimondo Betti (Int. J. Control, 2015)

A Novel Second Order Repetitive Control That Facilitates Stability Analysis and its Application to Magnetically Suspended Rotors. - Peiling Cui; Zhiyuan Liu 009; Guoxi Zhang; Han Xu; Richard W. Longman (IEEE Access, 2019)

Modifying and optimizing the inverse of the frequency response circulant matrix as an iterative learning control compensator. - Shuo Liu; Richard W. Longman (CoRR, 2021)

On designing finite time iterative learning control based on steady state frequency response. - Shuo Liu; Richard W. Longman; Benjamas Panomruttanarug (CoRR, 2021)

An adaptive smooth second-order sliding mode repetitive control method with application to a fast periodic stamping system. - Chao Jia; Richard W. Longman (Syst. Control. Lett., 2021)

Stability of Sliding Mode ILC Design for a Class of Nonlinear Systems With Unknown Control Input Delay. - Xiaoyu Zhang 007; Richard W. Longman (IEEE Trans. Neural Networks Learn. Syst., 2022)

A Method to Speed Up Convergence of Iterative Learning Control for High Precision Repetitive Motions. - Richard W. Longman; Shuo Liu; Tarek A. Elsharhawy (CoRR, 2023)

Lifted Time Stable Inversion Based High Precision Feedforward Control for Non-minimum Phase Systems. - Shaoqin Zhu; Xiaoqiang Ji; Richard W. Longman; Yangsheng Xu (CDC, 2024)

Lifted time stable inversion based feedforward control for linear non-minimum phase systems. - Xiaoqiang Ji; Shaoqin Zhu; Yangsheng Xu; Richard W. Longman (Autom., 2025)