Dynamic Modeling and Control of Nonholonomic Wheeled Mobile Robot: when subjected to wheel slip

Improving navigation performance of autonomous wheeled mobile robot (WMR) in a dynamic, unstructured environment requires improved maneuverability. In such cases, the dynamics of wheel slip may violate the ideal no-slip constraint generally used to model nonholomic WMR. In this book, a new model is presented to tackle the modeling inadequacy that arises when slip is neglected by including both longitudinal and lateral slip dynamics into the overall dynamics of the WMR. The presented model provides a realistic simulation scenario that can be utilized to develop model-based controller to improve WMR navigation. In particular, to demonstrate how this model can be useful in developing model-based planning and control of WMR with wheel slip, a dynamic path-following controller is designed to allow the WMR to navigate efficiently by autonomously regulate its forward velocity based on the generated traction force at the wheel-surface contact point.