What is the purpose of the integral action in a PID controller?

What is the purpose of the integral action in a PID controller?

Step 1: Understand what a PID controller is. It is a tool used to control systems by adjusting outputs based on errors.
Step 2: Know that PID stands for Proportional, Integral, and Derivative. Each part has a different role.
Step 3: Focus on the integral action. It looks at the error over time.
Step 4: The integral action adds up all the past errors. This means it keeps track of how long the error has been present.
Step 5: By accumulating the error, the integral action helps to correct any persistent error that doesn't go away on its own.
Step 6: This process helps to eliminate steady-state error, which is when the system settles at a value that is not the desired target.

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