Question: A drive system with an elastically coupled load was presented in Problems 71 and 67 in Chapters 4 and 5, respectively (Thomsen, 2011). That drive
A drive system with an elastically coupled load was presented in Problems 71 and 67 in Chapters 4 and 5, respectively (Thomsen, 2011). That drive was shown in Figure P5.43 as the controlled unit in a feedback control system, where ΩL(s) = the load speed and Ωr(s) = the desired (reference) speed. If the controller transfer function is GC(s) = Kp + KI/s ; while all of the other parameters and transfer functions are the same as in Problem67 in Chapter 5, find the range of KP for stability of the system if KI = 0.1.

0.1 TL 2,(3) |Tem(s). KM 2,(s) Gds) G(s) FIGURE P5.43
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