Methods and systems for emi assessment for brake pad wear estimation

A method for performing a data validity assessment for a brake pad wear estimation, comprising:

• providing an electric park brake assembly including a motor and a battery management sensor and a controller in electronic communication with the electric park brake assembly and the battery management sensor;
• receiving, by a controller, motor current data from the motor of the electric park brake assembly;
• receiving, by the controller, battery current data from the battery management sensor;
• determining, by the controller, a margin of current from the motor current data and the battery current data;
• receiving, by the controller, historical motor position data of the motor and instant motor position data of the motor;
• calculating, by the controller, the brake pad wear estimation using the motor current data;
• comparing, by the controller, the historical motor position data and the instant motor position data against an expected range of motor positions;
• determining, by the controller, an electromagnetic interference level from the margin of current, the historical and instant motor position data, and the calculated brake pad wear estimation;
• and
• discarding, by the controller, the motor current data when the electromagnetic interference level is above a predetermined threshold.

An automotive vehicle, comprising:

• a vehicle body enclosing a propulsion system including a vehicle battery and a wheel coupled to the vehicle body;
• a sensor coupled to the vehicle battery and configured to provide battery current data;
• a brake assembly coupled to the wheel, the brake assembly including an electric park brake and a motor coupled to the electric park brake;
• and
• a controller electronically connected to the brake assembly and the sensor, the controller configured to:
• receive motor current data and measured motor travel data from the motor coupled to the electric park brake;
• receive battery current data from the sensor coupled to the vehicle battery;
• calculate a margin of current from the motor current data and the battery current data;
• calculate a brake pad wear estimation from the motor current data;
• determine an expected motor travel of the motor coupled to the electric park brake;
• analyze the margin of current data, the measured motor travel data, the expected motor travel, and the calculated brake pad wear estimation to determine if a first condition is satisfied;
• when the first condition is satisfied, revise the calculated brake pad wear estimation using the motor current data;
• and
• when the first condition is not satisfied, discard the motor current data.