申論題

Problem 1 (18%) The block diagram of a control system is displayed in Fig. 1.
Figure 1: Control system of Problem 1.

(b) (5%) If the control system is not controllable (or not observable) in part (a), is it possible to reassign the state variables so that it becomes a controllable (or observable) system? If your answer is yes, then reassign the state variables and recheck the condition of controllability and observability.