The photovoltaic sun tracker allows us to increase the energy production. The
sun tracker considered in this study has two degrees of freedom (2-DOF) and
especially specified by the lack of sensors. In this way, the tracker will have
as a set point the sun position at every second during the day for a period of
five years. After sunset, the tracker goes back to the initial position (which
of sunrise). The sliding mode control (SMC) will be applied to ensure at best
the tracking mechanism and, in another hand, the sliding mode observer will
replace the velocity sensor which suffers from a lot of measurement
disturbances. Experimental measurements show that this autonomic dual axis Sun
Tracker increases the power production by over 40%