...Douglas A. Bristow; Andrew G. Alleyne; Marina Tharayil This brief paper considers iterative learning control (ILC) for precision motion control (PMC) applications. This work develops a methodology to design a low pass filter, called the Q -filter, that is used to limit the bandwidth of the ILC...

...Chih-Lyang Hwang, Professor,; Yung-Ming Chen We consider the modeling and control of a high-displacement piezoelectric actuator system (HDPAS). An HDPAS includes a multilayer LVPZT bender actuator (MLBA) and a low-pass filter. The MLBA is subject to hysteresis, bending modes, measurement noise...

... in the repetitive signal generator of the internal model. Stability and robust performance is achieved through μ-synthesis. The modified low-pass filter is motivated by the attempt to reduce the sensitivity function by squaring it. The magnitude of the sensitivity function is substantially reduced at the periodic...

... theory (QFT) controller (a low pass filter) to minimize the oscillations within the boundary layer and considerably improve the tracking response. We also provide an example to demonstrate the key features of the proposed method. Corresponding author. Bartoli , G. , and Pydynowski , P...

... and scheduling the switching control gain automatically. Once the system enters the sliding motion, two classes of low-pass filters are introduced to work concurrently for the purpose of acquiring equivalent control, reducing the switching gain effectively, and as a result eliminating chattering. By virtue...