Actuators with high linear motion speed, high positioning resolution and long motion stroke are needed in many
precision machining systems. In some current systems, voice coil motors (VCMs) are implemented for servo control.
While the voice coil motors may provide long motion stroke needed in many applications, the main obstacle that hinders
the improvement of the machining accuracy and efficiency is its limited bandwidth. To fundamentally solve this issue,
we propose to develop a dual-stage actuation system that consists of a voice coil motor that covers the coarse motion and
a piezoelectric stack actuator that induces the fine motion to enhance the positioning accuracy. A flexure hinge-based
mechanism is developed to connect these two actuators together. A series of numerical and experimental studies are
carried out to facilitate the system design and preliminary control development.