VTRのヘッド可動用アクチュエータの制振制御

概要

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An ultra small actuator for the moving magnetic head in the DTF (Dynamic Track Following) system in VCRs has been developed. This actuator is the moving-coil type, utilizing cylindrical permanent magnet. The DTF system consists of an actuator and a servo control system. In order to achieve DTF system with high performance, it is necessary to improve the mechanical vibration characteristics of the actuator. This paper deals with the design method of the active vibration control loop using the velocities and displacements of a moving magnetic head. These physical quantities are measured by means of a moving sensor coil installed near the driving coil. In this construction, the alternating current caused by mutual inductance effect led to the sensor coil plays an important role in the active vibration control loop, and it is shown experimentally that a velocity and displacement feedback control loop which accounts for these influences can reduce mechanical vibration.
一般社団法人日本機械学会の論文
1993-11-25