Abstract: Disclosed examples include measuring, via a sensor, a brake torque generated by a braking system; determining an energy output of the braking system based on a mechanical power output of the braking system, the mechanical power output based on the brake torque; determining an efficiency based on the energy output and an energy input, the energy input corresponding to an electrical power input of a motor of the braking system; detecting a condition of the braking system based on the efficiency; and outputting an indication representative of the condition.

Abstract: Disclosed examples include measuring, via a sensor, a brake torque generated by a brake of a braking system; providing a first current to a motor to actuate the brake, the first current to cause the measured brake torque to satisfy a target brake torque; determining a residual value based on the first current and a second current of the motor associated with a first gap between a friction material and a braking surface of the brake; detecting a condition of the braking system based on the residual value and a difference between the second current and a third current of the motor, the third current associated with a second gap between the friction material and the braking surface; and outputting an indication representative of the detected condition.

Abstract: Methods and apparatus to estimate brake pad wear are disclosed. An example apparatus includes at least one processor circuit to obtain temperature data and power data associated with a brake pad of a vehicle, execute a neural network based on the temperature data and the power data, the neural network trained based on a loss value corresponding to a difference between (a) a first rate of change of an output of the neural network when the neural network is executed based on training data, the first rate of change evaluated at a first temperature and a first power, and (b) a second rate of change proportional to a ratio between the first temperature and the first power, determine, based on a result of the execution of the neural network, a brake wear metric corresponding to the brake pad, and cause presentation of the brake pad metric via a user interface.