Wiley signals and systems e book TLFe BO 412

16.3 Feedback Systems 397 mTewill start with the first-order plant from Figure 16.6 The forward path of h e systerxi h;ts tlic first-ordrr transfer function aid R pole at s = a > in the right half of the s-plane It is thcrcforc unstable W e choose for the feedback path, a P-circuit, (shown in Figrare 8.24) with a ~ I ~ ~ l i ~ c a t i ~ ~ I Figure 16.6: First-ordvr plant with P-control (16.29) Fecdbark WIF dso have thcx oppositc cff'ect: a stable plant can bc c-lc>stal)ilised by feedback Hcrc w e start atgttln with Pigme lC6.6, hut t h i s time choose U <