An automated fluid flow control system with accelerated speed of response includes a programmable controller and a flow control device. The programmable controller includes a look-up table and a fine-adjustment software routine. The flow control device may be an angularly adjustable damper in a duct or a fan blower in a duct. A rotation device is used to rotate the damper blade. The rotation device rotates the damper blade to a specific angle according to a control signal value, which is associated with a fluid flow rate. The angle of the damper blade is associated with a fluid flow rate in the duct by sampling flow rate during commissioning. The fine-adjustment software routine includes sampling the fluid flow rate and increasing or decreasing the control signal value to obtain the desired fluid flow rate with the flow control device. A motor drive controller is used to drive the fan blower.