Reference model control for improving motion accuracy of a micro lathe
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A two-axis micro-lathe was developed in 1996 at the former Mechanical Engineering Laboratory in Tsukuba, Japan, for machining of small pieces as a part of the Micro-factory concept. Each axis is driven by a set of built-in PZT actuators. The work presented here concerns the design and implementation of a reference model control algorithm to improve the motion accuracy of the micro-lathe. The motion control was originally assured by a PI action considering dead zone. The performances of the reference model control were experimentally tested and compared with those obtained with PI control for four common trajectories used in manufacturing machines.
KeywordsMicro-lathe PZT actuator Accuracy Reference model control Micro-machines
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