Force Feedback Control for Block Spring Motor

Abstract

High precise positioning and force control are based on nanotechnology. Nanotechnology, especially nanometer positioning technology with high speed and robust force feedback control requires the utilization of a variety of technical fields including magnetic recording, biotechnology and the semiconductor industry. Until now there have been various actuator systems proposed, but the structure models have only working distances of either under a millimeter or over ten millimeters. A structural model with working distances ranging several millimeters has not yet been designed. Therefore we are proposing a new structure design of actuator that would allow us to build actuator systems with working distances between those parameters. This new actuator consists of a voice coil motor and a new guide with an elastic support mechanism. The elastic support mechanism consists of a special spring which is restricted to moving only one-way. This new ESM does not cause any lose motion, mechanical play or friction with motion. Since characteristically voice coil motor thrusts and displaces the elastic support mechanism linearly, highly precise positioning and force control can be realized using a simple controller. This paper will provide basic data for developing future nano-actuator systems.