An integral resonant control scheme for a laser beam stabilization system

Laser beam stabilization systems have important engineering applications, for example in aircraft/spacecraft targeting, and free space laser-based communication, etc. Recent studies show that such systems are negative-imaginary systems with free body motion. Based on negative-imaginary theory, this paper proposes an integral resonant controller for the Quanser´s laser beam stabilization system and optimizes the controller parameters. The proposed control scheme not only compensates for vibration sources and stabilizes the laser beam position, but also guarantees the robustness with respect to system parameter uncertainty. Simulation results obtained from the Quanser´s laser beam stabilization simulation model are reported and comparisons are made with a PID controller.