Different types of disturbances in control system?


These energy variations are called disturbances, upsets, or load changes.
Types of disturbances in control system are

Change in setpoint - The setpoint is the desired value of the
measured variable.
Change in supply - This is a variation in any of the energy inputs to
the process
Change in Demand-This is a disturbance in the output flow of energy.
Environmental Changes-Ambient temperature or atmospheric pressure