Precision Motor Control System for VTR using Disturbance and Velocity Observer

Abstract

In this paper, we describe a high performance VTR motor servo system based on modern control theory, which eliminates wow and flutter and improves control capability. Specifically, we developed a new method of motor control, composed of an acceleration controller and a sensor noise reduction system using disturbance and velocity observers. The results of this development were a reduction in wow-flutter by nearly 20dB measured at the capstun motor and 10 dB measured at the drum motor. In addition, high band disturbance estimation using the velocity observer's noise reduction system allowed a design of robust system using disturbance compensation.