The controllability or the observability of the continuous time subsystems is not required since the controllers consist of the discrete event dynamics as well as the continuous time dynamics.

• 由于控制器的设计不仅包含控制器连续时间动态行为的设计还包含离散事件动态行为的设计，因此不要求混杂系统中每个连续子系统都具有可控性或可观性。