FAS plots the magnitude versus frequency and phase versus frequency for both the Galil motion controller and the plant. The plant’s frequency response is measured from the actual plant. The controller’s response is simulated based on the selected control parameters. The product of the two functions is the system open loop frequency response.
The Frequency Analysis Software allows the designer to try various simulations of the controller parameters such as the PID filter and notch parameters and combine them with the plant to give the open loop frequency response. Based on the simulations, the designer can determine the best controller parameters to meet the desired performance criteria of phase margin and cross-over frequency for his system.