Clutch control using a filtered piston position signal

A vehicle includes an engine, a transmission and a controller. The transmission includes a clutch pack, a clutch piston and a position sensor. The sensor measures a changing magnetic field in relation to the piston, and encodes the measured magnetic field as a raw position signal. The controller receives the raw position signal and processes the raw position signal by a signal processing module to generate a filtered signal, attenuates the signal noise in the position signal. The controller determines a commanded position of the piston and calculated using the commanded position and the filtered position signal separate proportional (P), differential (D) and integral (I) control terms. Additionally, the controller as a function of PID terms and the commanded position feedforward term computed using the commanded position a feedforward control term and a requested flow rate for actuating the clutch pack. The controller operates the clutch pack using the commanded flow.