Textbook in PDF format

Though there have been significant advances in the theory and applications of linear time-invariant systems, developments regarding repetitive control have been sporadic. At the same time, there is a dearth of literature on repetitive control (RC) for nonlinear systems.
Contents
Introduction
Preliminary
Repetitive Control for Linear System
Robustness Analysis of Repetitive Control Systems
Filtered Repetitive Control with Nonlinear Systems: Linearization Methods
Filtered Repetitive Control with Nonlinear Systems: An Adaptive-Control-Like Method
Continuous-Time Filtered Repetitive Control with Nonlinear Systems: An Additive-State-Decomposition Method
Sampled-Data Filtered Repetitive Control With Nonlinear Systems: An Additive-State-Decomposition Method
Filtered Repetitive Control with Nonlinear Systems: An Actuator-Focused Design Method
Repetitive Control with Nonlinear Systems: A Contraction Mapping Method