Fall 2013—Assignment 3—Due at start of Class 4 on September 24
Second-order automatic feedback system diagram
Identify a system that includes two automatic feedback loops—
where one is nested inside the other (a second-order system)
- The system should not rely on a person to close either feedback loop.
Create a diagram of the system (on a single 8.5 x 11 inch page)
- Identify the components of the system and their functions (e.g., lever, height indicator)
- Describe the components of both feedback loops in cybernetic terms (e.g., sensor, comparator, actuator, etc.)
- Represent the relationships between components visually
- Title the system
- Include your name, the date, and the assignment number
Your diagram should help its audience answer these questions:
- Where is the boundary between the system and its environment?
- Where is the boundary between the observed system and the observing system?
- What is the goal of the observing system?
- What is the goal of the observed system?
(Hint: The observed system’s goal should be dynamic; that is, it should be changed by the observing system.)
- What forces typically disturb the system or push it away from its goal?
Be careful to avoid a situation where the two systems are actually two first-order loops that are NOT nested. You can tell this easily because, for the structure to be a second-order system, the outer system MUST alter the goal of the inner, nested system.
Goals of the assignment:
- Provide experience identifying second-order systems and describing their components
- Provide experience building and communicating models of systems
Please make 2 copies, one for yourself and one to hand in.
Please email a copy to email@example.com and firstname.lastname@example.org and also send to dropbox BEFORE class begins.
Whenever you email, with questions or updated assignments, please send to both the above email addresses.