Quench limit cycle using different dither signal in a servo motor system

This paper concerns about the implementation of dither signals to quench the undesirable limit cycle was produced by saturation and backlash in a dc servo motor system. Various shapes of dither signals are injected into the system. Simulation results show that three dither signals evidently work differently. In this system, sinusoidal and saw-tooth dither can quench the limit cycle better than square wave dither.