The research project aims to develope a methodology for the control design taking into account the hysteresis effects and the self-excited chatter vibrations, which leave oscillation marks on the workpiece surface. In addition, the chatter vibrations bring time delay effect and time varying dynamics to the machining systems. It is well-known that when a closed loop system involves time delays effects, the system performance degrades seriously. In the literature, few works have been published to deal with both hysteresis and time delays effect. But the published methods are somehow complex for practical implementation. Simple and reliable control strategies are required.
The objective of the research project is to realize a technology to achieve ultraprecision positioning control using a piezo actuator based fast tool servo (FTS) modular. The developed modeling and control methodology will be verified both in virtual environment and physical experimental tests.