Chapter 6 8 Example:Determine the controllability of following systems 「-7 ●0 2 (1) = 0 2 9 -7 (2) Solution: 9 (1)Uncontrollable. (2)Controllable.8 Example: Determine the controllability of following systems u                          9 0 2 0 1 5 7 0 x x u                          7 5 4 0 0 1 0 1 5 7 0 x x （1） （2） Solution: (1) Uncontrollable. (2) Controllable. Chapter 6