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State machines
State Machines: A Formal Explanation A state machine is a formal model used to represent a system's behavior over time. It consists of a finite set of st...
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State Machines: A Formal Explanation A state machine is a formal model used to represent a system's behavior over time. It consists of a finite set of st...
A state machine is a formal model used to represent a system's behavior over time. It consists of a finite set of states, transitions between them, and a set of actions that can be executed within each state.
States: A state machine has a finite set of states, represented by variables or symbols. Each state represents the system's behavior in a specific condition.
Transitions: Transitions represent the changes in state that occur when the system transitions between different states. Each transition is represented by a pair of states, where the first state is the initial state, and the second state is the final state.
Actions: Actions are executed when the system transitions from one state to another. Each action can have a specific effect on the system's behavior, such as changing the system's state, triggering other events, or performing a specific task.
Example: Consider a vending machine that can be in either a "Hungry" or "Full" state. The machine transitions between these states when it detects a coin inserted. When the machine is full, it cannot accept any more coins, and it transitions back to the "Hungry" state.
Applications of State Machines: State machines find applications in various fields, including:
Cyber-Physical Systems: They are used to model the behavior of complex cyber-physical systems, such as smart devices, transportation systems, and medical equipment.
Artificial Intelligence: They are used to represent the behavior of intelligent agents and machines.
Game Design: They are used to design the behavior of video games, including character movement, item pickup, and game events.
Key Concepts:
State: A specific condition or situation that the system is in.
Transition: A change in state from one state to another.
Action: An event or task that is executed when the system transitions between states.
State diagram: A visual representation of the states, transitions, and actions of a state machine