E4.2 A closed-loop system is used to track the sun to obtain maximum power from a photovoltaic array.

The tracking system may be represented by a unity feedback control system and

100 Ge(s)G(s) = TS+1' where 3s nominally. (a) Calculate the sensitivity of this system for a small change in 7. (b) Calculate the time constant of the closed-loop system response.