Positioning Improvement for a Laser Scanning System using cSORPD control

Friction is one of the significant factors to degrade the transient accuracy of positioning systems. In this respect, the present paper proposes implementing a nonlinear control to perform friction compensation to improve the positioning accuracy for a controlled DC motor of a laser positioning system with friction, which is assumed to be appropriately described using a dynamic friction model. The global asymptotic positioning stability proof was performed using Lyapunov’s direct method.