Influence of Control Valve Delay and Dead Zone on the Stability of a Simple Hydraulic Positioning System

Figure 5

Linear stability chart at sampling time $t_s=0.1\hspace{0.17em}\text{s}$ and time delay $t_d=0\text{,}$$t_d=t_s/7\text{,}$$t_d=t_s/5\text{,}$$t_d=t_s/4\text{,}$$t_d=t_s/3\text{,}$$t_d\to t_s/2\text{,}$$t_d=t_s.$