This paper proposes a new approach to disturbance estimation based on a curvature model to improve the disturbance rejection performance of a servo system. The main feature is that the stability of the control system is guaranteed when the disturbance estimation is incorporated directly into the designed control law. Simulation results show that disturbances are rejected efficiently when this a...

In this paper we solve tracking and disturbance rejection problems for stable infinitedimensional systems using a simple low-gain controller suggested by the internal model principle. For stable discrete-time systems, it is shown that the application of a low-gain controller (depending on only one gain parameter) leads to a stable closed-loop system which asymptotically tracks reference signals...

In this study Proportional-Integral-Derivative (PID) control of brushed DC Motor is analyzed. The parameters the PID controller are tuned with two different approaches, namely Ziegler-Nichols (ZN) and Particle Swarm Optimization (PSO). system tested under sinusoidal disturbance varying frequencies in order to evaluate compare rejection performances. It shown that PSO approach has clearly higher...

This paper presents an application of two-parameter robust repetitive control (TPRRC) in disk drive servo control, where the repeatable rrmout (RRO) and non-repeatable runout (NRRO) are rejected simultaneously. The repeatable disturbances are rejected by tbe internal model structure of TPRRC, while the nonrepeatable disturbances are attenuated by the robust performance specification. The design...