A sensor generates a sensor signal indicative of a sensed variable. A first filter is applied to the sensor signal, and filters the sensor signal based on a first set of sensor data, to generate a first filtered signal. A second filter is applied to the sensor signal, based on a second set of sensor data that is greater than the first set of sensor data, to generate a second filtered sensor signal. The first and second filtered sensor signals are compared to generate a control signal that can be used to control a controllable subsystem of a mobile machine.