Feed Forward Control: A Simple Explainer Video

Feed forward control is a proactive control strategy that anticipates and responds to disturbances before they affect a system's output.To understand the difference between feed forward and feedback control, let's use a simple driving analogy.In feed forward control, like a skilled driver, the system anticipates changes and responds proactively.The driver sees the curve ahead and starts turning the steering wheel before reaching it.In a feed forward control system, sensors continuously monitor potential disturbances.This is different from feedback control, which waits for errors to occur before making corrections.Feed forward control responds before the disturbance affects the system, while feedback control reacts after detecting an error.A feed forward control system consists of three main components working together to anticipate and prevent disturbances.First, we have the disturbance sensors that continuously monitor potential changes in the system.The control algorithm processes this sensor data using mathematical models to calculate necessary adjustments.Finally, actuators implement these calculated corrections before the disturbance can significantly impact the process.Let's look at a practical example using a home heating system.Outdoor temperature sensors continuously monitor the external temperature.When the sensors detect a temperature drop, the control algorithm calculates the necessary heating adjustment.The furnace then adjusts its output before the indoor temperature can be affected, maintaining a comfortable environment.Feed forward control systems offer significant advantages over traditional feedback control.When a disturbance occurs, feed forward control responds much faster than feedback control.Let's examine the key advantages of feed forward control systems.Feed forward control finds applications in various industrial and commercial systems.However, these systems have specific requirements to function effectively.To overcome these limitations, feed forward control is often combined with feedback control in a hybrid system.This combination provides both proactive disturbance rejection and error correction capabilities.