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Semi-global finite-time stabilisation via output feedback of planar non-linear systems with application to MPPT in photovoltaic systems

This paper investigates the problem of using output feedback to semi-globally stabilise a class of planar non-linear systems with unknown control coefficients. For any given bounded set of initial condition, a non-smooth output feedback controller using a reduced-order observer is explicitly constructed to stabilise the planar system in a finite time. We also show that the proposed non-smooth output feedback controller can be used to solve the problem of Maximum Power Point Tracking (MPPT) in Photovoltaic (PV) arrays for certain solar radiation and temperature.