Invention Grant
US07975314B2 Scanning probe microscope and active damping drive control device 有权
扫描探针显微镜和主动阻尼驱动控制装置

Scanning probe microscope and active damping drive control device
Abstract:
There is provided a scanning probe microscope that allows active damping to be advantageously carried out.A Z scan control section functions as a driving control section to control a Z scanner that is a controlled object. Driving control is performed by supplying the controlled object with a driving signal processed by an adjustment function. The adjustment function adjusts the driving signal by using a simulated transfer function that simulates an actual transfer function indicative of an actual frequency characteristic of the controlled object so that executing processing of the simulated transfer function on the adjusted driving signal results in decrease of vibration of an output signal from the simulated transfer function. The adjustment function processing is configured so as to execute processing of the simulated transfer function G(s) on the driving signal, to execute processing of an inverse target transfer function K(s) corresponding to the inverse of the target transfer function on an output from the G(s), to determine the difference between the driving signal and the output of K(s), to apply a gain g to the difference, and to add the signal after the gain is applied to the driving signal. Therefore, the output from the G(s) approximates to the target transfer function which is the inverse of the K(s).
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