Contour tracking of machine tool feed drive systems

Summarizes the current advancement in contour tracking control of machine tool feed drive systems. Contouring performance can be improved by introducing a trajectory dependent coupling effect among the feed drive axes. We summarize various approaches to synthesize these trajectory dependent cross-coupling controllers. Advancement in synthesizing linear parameter varying (LPV) controllers provided a good framework for designing trajectory dependent cross-coupling controllers. By transforming the machine tool feed drive dynamics to a local task-based coordinate frame, a contour tracking controller can be designed using a gain scheduling approach for LPV systems.