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In this paper we describe the cross-coupling effect between X-Y axes of piezoelectric tube (PZT) scanner used in an atomic force microscope (AFM). During raster scanning X-Y axes induced cross-coupling effect in the lateral positioning of the scanner stage of the AFM and as a result, it produces blurred or distorted images. To address this effect, an LQG controller is designed and implemented on AFM...
In this paper, we present a spiral scanning method using an atomic force microscope (AFM). Spiral motion is generated by applying slowly varying amplitude sine wave in the X-axis and cosine wave in the Y-axis of the piezoelectric tube (PZT) scanner of the AFM. An LQG controller also designed for damping the resonant mode of a PZT scanner for the lateral positioning of the AFM scanner stage. In this...
This paper presents the real time implementation of genetic algorithm (GA) based PI controller tuning for position control of DC motor. Here the initial value of proportional gain and integral gain of PI controller are selected from well recognized Ziegler Nichols tuning formula and then optimized by GA to achieve the best speed response. After observing the controller response in simulation, the...
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