Problem:

Control theory deals with behaviour of dynamical systems. Traditionally mechanical and electro-mechanical solutions were employed to control a system, but to diminish cost and implement more complex functionality; computers in the form of embedded systems were introduced as controllers.

a) Consider an automobile's cruise control, which is device designed to sustain a constant vehicle speed.

i. Illustrate out how the notion of control theory can be applied in above case, based upon open-loop control system.

ii. Illustrate out how the system can be monitored with close-loop control system.

iii. Which one will be more proper: a closed-loop or open-loop control system?

b) Make a distinction between time-triggered execution model and event-triggered execution model.

c) Outline how the following control systems operate.

i. Polling system

ii. Interrupt based system

iii. Process-based system