Consider the system shown in Fig. 3.68.
(a) Compute the closed-loop characteristic equation.
(b) For what values of (T,A) is the system stable? Hint: An approximate answer may be found using
Figure 3.68 Control system for Problem 3.47 or
For the pure delay .As an alternative, you could use the computer MATLAB (SIMULINK®) to simulate the system or to find the roots of the system's characteristic equation for various values of T and A.