Control system and control method for reducing rattle noise of brake caliper

A control system for reducing rattle noise of a brake caliper, the control system comprising:

• a wheel speed sensor configured to detect a wheel speed of each wheel to which a caliper device is configured to be mounted;
• a controller configured to determine a vibration level value according to a road surface state of a road on which a vehicle is driven by processing and analyzing a wheel speed signal received from the wheel speed sensor, and, when the road surface state of the road is determined as a road surface state in which unevenness exists from the determined vibration level value, output a control signal for applying oil pressure for preventing rattle noise to a wheel cylinder of a brake device provided to the wheel;
• a braking driver configured to generate and supply the oil pressure for preventing rattle noise according to the control signal output from the controller;
• and
• the wheel cylinder of the brake device, to which the oil pressure for preventing rattle noise, which is supplied by the braking driver, is applied,
• wherein the controller is configured to convert the wheel speed signal received from the wheel speed sensor into an acceleration signal, and, when a vibration level value evaluated by processing and analyzing the acceleration signal is not less than a setting value, determine the road surface state of the road as a road surface state in which unevenness exists, and
• wherein the vibration level value is a power spectral density (PSD) value evaluated by performing PSD analysis on the acceleration signal.