Real-time Model Identification for Beam Stabilization in Laser Pointing Systems

This paper investigates the problem of model identification in laser pointing systems, which is one of the most important issues to guarantee beam stabilization. This problem is essentially challenging in view of that misalignments always exist among individual optical components and result in uncertain modeling errors. Focusing on this problem, the structure of propagation equation of the laser beam is derived, and a filtering estimation algorithm is then proposed to identify the undetermined parameters. With this approach, a high-precision model can be estimated in real time for control laws. Finally, an illustrative example is simulated to substantiate the efficacy of the proposed approach.