  In this research we propose a new compound Fractional Order Sliding Mode
Controller (FOSMC) and SuperTwisting Controller (FOSMC+STC) to control of a
MEMS gyroscope. A new sliding mode surface has been defined to design the
proposed new sliding mode controller. The main advantages of a FOSMC is its
high tracking performance and robustness against external perturbation, but it
is susceptible to chattering. By augmenting a STC with a FOSMC, the chattering
phenomenon is eliminated, singularity problem is solved and systems robustness
has significatnetly improved. Simulation results validate the effectiveness of
the proposed control approach.
