What are the categories of the process control?

Process control can be categorized into three main types: feedforward control, feedback control, and cascade control. Feedforward control anticipates disturbances and adjusts the input accordingly, while feedback control monitors the output and makes adjustments based on deviations from the desired performance. Cascade control involves multiple control loops, where one controller's output serves as the setpoint for another, enhancing system stability and performance. Each category plays a crucial role in maintaining desired operational conditions in various industrial processes.