boost converter 1 control system 1 environmental conditions 1 higher order sliding mode observer (HOSMO) 1 instrumentation 1 integral-backstepping 1 maximum power point tracking (MPPT) 1 parameter estimation 1 photovoltaic (PV) photovoltaic system 1 solar radiation 1 strategic approach 1 super twisting control (STC) 1 temperature effect 1 tracking 1 voltage source inverter (VSI) 1