Control assistance device, control system, and filter adjustment method

A control assistance device configured to assist in setting a plurality of first filters provided in a servo control device configured to control a motor, the control assistance device comprising:

• a resonance detection unit configured to detect a plurality of resonance points in frequency characteristics in input-output gain of the servo control device, the frequency characteristics being measured based on an input signal and an output signal each having a varying frequency;
• a filter setting unit configured to set, to suppress the plurality of resonance points, a plurality of second filters that are greater in number than the plurality of first filters;
• and
• a grouping unit configured to separately group the plurality of second filters to set the plurality of first filters,
• wherein the grouping unit sets the plurality of first filters, by combining two or more filters in the plurality of second filters to provide at least one composite filter, and the number of the plurality of first filters is equal to or less than a restriction number of filters provided in the servo control device, and
• the servo control device controls the motor based on the setting of the plurality of first filters.