Force control for an electromechanical brake actuator

A brake system comprising:

• an electromechanical brake actuator;
• and
• a ball screw,
• wherein the ball screw is configured to be extended, by the electromechanical brake actuator, in order to apply a requested force to a brake pressure plate in order to force a plurality of rotating discs and stators together in an axial direction in order to reduce a rotational speed of the plurality of rotating discs, and
• wherein the ball screw is configured to be extended, by the electromechanical brake actuator, based on a worn state of the plurality of rotating discs and a stiffness curve for the electromechanical brake actuator that represents force versus ball screw position for the worn state.

A method of controlling an electromechanical brake actuator of a brake assembly comprising:

• responsive to receiving a request to apply a requested force to the brake assembly, identifying, by an electromechanical brake actuator controller, a worn state of a plurality of rotating discs of the brake assembly;
• identifying, by the electromechanical brake actuator controller, a ball screw position based on the worn state and a stiffness curve for the electromechanical brake actuator that represents force versus ball screw position for the worn state;
• and
• responsive to identifying the ball screw position for the requested force from the stiffness curve for the electromechanical brake actuator, commanding, by the electromechanical brake actuator controller, the electromechanical brake actuator to extend a ball screw to the ball screw position to apply the requested force to a pressure plate towards an end plate thereby forcing the plurality of rotating discs together in an axial direction in order to reduce a rotational speed of the plurality of rotating discs.