Observer based kinematic tracking controllers for a unicycle-type mobile robot

In this paper the problem of global trajectory tracking for the kinematic model of a unicycle-type mobile robot is considered. It is assumed that some of the tracking error coordinates are not measurable. Using a cascaded systems approach we develop full order and reduced order observers, and introduce an observer based controller resulting in K-exponential convergence of the tracking error. Simulations are provided to illustrate the results.