A Mechatronics Framework for High Precision Machining

The development of a new mechatronic tool holder system that is capable of fast and precise local tool adjustments based on sensory feedbacks is proposed. Central to this development is the use of magnetic servo levitation for driving the tool as well as for measuring tool forces. To control the device, a Neural Network based model identifier and H-infinity based high servo stiffness scheme will be used. The device will be capable of a high bandwidth tool adjustment up to 300Hz and long range motion 1 mm. This long range feature is particularly desirable for fabricating non-rotationally symmetric surfaces considering that conventional piezoelectric driven systems average an order of magnitude smaller ranges. Since the beginning of the project 2 months ago, initial efforts have focused on sizing the electromagnets such that sufficient force can be generated while minimizing the volume of the actuator.