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We have many servo systems that require nano/micro level positioning accuracy. This requirement sets a number of interesting challenges from the viewpoint of sensing, actuation, and control algorithms. This paper considers the control aspect for precision positioning. In motion control systems at nano/micro levels, it has been noted that the control algorithm should be customized as much as possible...
This brief presents an adaptive output regulator, an add-on type output regulator with a frequency adaptation algorithm. The frequency adaptation algorithm, based on an internal model principle, is used to identify the frequency of a sinusoidal disturbance. By adding the modified adaptive algorithm to the add-on output regulator, the adaptive output regulator can reject a biased sinusoidal disturbance...
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