【单选题】For the system in Fig., determine the Nyquist plot and apply the Nyquist criterion to determine the range of values of K (k>0) for which the system is stable 提示:nyquist图不能包围(-1,j0)点, 与实轴负半轴的交点虚部为零,计算出...
【单选题】For the system in Fig., determine the Nyquist plot and apply the Nyquist criterion to determine the number of roots in the right half plan (RHP) for those values of K for which the system is unstable.
【单选题】Figure shows the Nyquist plot of the open loop transfer function G(s)H(s) of a system. If G(s)H(s) has one right hand pole, the closed loop system is