Abstract
It has been popular to use the sampled data control system in mechanical positioning control system. On the other hand, the positioning mechanical system has several resonance frequencies that diminish the precise positioning performance. The purpose of this study is to clear the influence between the sampling frequency and the resonance frequency from the precise positioning point of view. In this paper, a controller using FPGA (Field Programmable Gate Array) that can 40 MHz sampling rate applied to a positioning mechanism that consists of a DC motor and a rotary encoder. In this paper, the characteristics of the mechanism and the suitable sampling rate to the mechanical resonance are described.
