First order systems are the simplest systems.  If you can't understand them you won't get anywhere.

• Why learn about first order systems?
• First order systems are the simplest systems, and they make a good place to begin a study of system dynamics.  If you can't get first order systems, it doesn't make any sense to go on.
• What should you know to learn about first order systems?
• You need to some basic ideas of differential equations.  First order systems are described by first order differential equations.
• What do you need to know about first order systems?
• Generic Transfer Function for 1st Order Systems.
• Parameters in 2nd Order Systems
• DC Gain, G_dc
• Time Constant, t
• Parameters in 2nd Order Systems - Relation to response characteristics.
• How the time constant changes dynamic behavior
• How do you use first order system concepts?
• First order system concepts form the foundation for understanding more complex systems.  Everything starts here.
• Problems
• Additional Information