What is the difference between open loop control, feedback control, and feedforward control? Open loop control is a system without feedback, where...

Open loop control, feedback control, and feedforward control are three different approaches to control systems. Open loop control is a system without feedback, where the output is determined solely by the input signal. In this type of control, there is no mechanism to measure or adjust the output based on the desired value or any feedback from the system. It relies solely on the input signal to produce the desired output. Feedback control, on the other hand, uses a comparator to measure the controlled variable and adjust the manipulated variable to reach the desired value. It involves continuously monitoring the output of the system and comparing it to the desired value. Any deviation from the desired value is used as feedback to adjust the system and bring it back to the desired state. Feedforward control takes corrective action before the process is disturbed by measuring one or more input variables and predicting their effect on the process. It anticipates disturbances or changes in the system and adjusts the control variables accordingly, without relying on feedback from the output. This type of control is useful in situations where the disturbances can be measured or predicted in advance. In summary, open loop control relies solely on the input signal, feedback control uses feedback from the output to adjust the system, and feedforward control takes corrective action based on predicted disturbances before they affect the system.